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Steady-state and dynamic control of hydrocracking tail oil distillation process for high-valued products Asia Pac. J. Chem. Eng. (IF 1.8) Pub Date : 2024-04-24 Min Li, Wenzhi Liu, Yan Gao, Zhuocheng Huang, Gaoyang Li, Hui Pan, Hao Ling
The maximum utilization of hydrocracking tail oil becomes increasingly important for petrochemical industry. The aim of this work is to develop optimized distillation processes to achieve various high-valued qualified oil products from hydrocracking tail oil. Six different oil products is produced and the steady-state distillation process, which aims to fractionate six qualified narrow distillates
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Study on solid-air dendrite growth and motion with thermosolutal convection-diffusion using non-isothermal PF-PSLBM model Asia Pac. J. Chem. Eng. (IF 1.8) Pub Date : 2024-04-22 Chaolong Li, Jian Wen, Ke Li, Simin Wang
This study unveils a numerical paradigm that amalgamates the partially saturated lattice Boltzmann method (PSLBM) with the non-isothermal quantitative phase-field (PF) model. This innovative integration equips us with a prognostic tool ready to elucidate the progression and motion of solid-air dendritic growth in the presence of both natural and forced convection. The PSLBM is employed to compute the
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Investigation of the asymmetric flow structure in a hydrocyclone Asia Pac. J. Chem. Eng. (IF 1.8) Pub Date : 2024-04-22 Jian-gang Wang, Yan Zheng, Hua-lin Wang, Zhi-shan Bai, Yang Qiu
The flow field of a hydrocyclone was investigated using both computational fluid dynamics (CFD) and particle image velocimetry (PIV). A refractive index matching method was employed to improve the precision of the PIV measurements. The CFD results are in good agreement with PIV measurements. Detailed analysis reveals significant axial asymmetry in the velocity components, with the radial velocity component
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Simple and rapid synthesis of zeolite W from K-feldspar via the improved hydrothermal method Asia Pac. J. Chem. Eng. (IF 1.8) Pub Date : 2024-04-22 Zixuan Zhao, Kai Yang, Yun Li, Jilin Cao
An improved hydrothermal method was proposed to rapidly synthesize zeolite W from alkali fusion-activated K-feldspar. The effects of m (KOH)/m (K-feldspar), n (SiO2)/n (Al2O3), n (H2O)/n (SiO2), crystallization time, and crystallization temperature on the synthesis of the zeolite W were investigated. The optimal synthesis conditions were m (KOH)/m (K-feldspar) ratio of 1.5:1, the activation time of
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Synthesis and evaluation of PVC-Cu/Al2O3 nanocomposite membranes for removing of natural organic matter from the wastewater Asia Pac. J. Chem. Eng. (IF 1.8) Pub Date : 2024-04-18 Seyed Mehdi Sajjadi, Habib Etemadi, Masoumeh Zaremanesh
The synthesis of Cu/Al2O3 nanoparticles (NPs) was conducted by the citric acid sol–gel technique. We used the synthesized NPs to enhance PVC membranes and create PVC-Cu/Al2O3 nanocomposite membranes. The quantities of NPs utilized were 0, 0.5, 1, 1.5, and 2 wt.% of solid phase. The point of this study was to look into how PVC-Cu/Al2O3 membranes can be used to remove natural organic matter (NOM) from
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Sensitive and highly selective biosensor based on innovative V2O5 nanoparticles for detection of glutathione Asia Pac. J. Chem. Eng. (IF 1.8) Pub Date : 2024-04-18 Han Lu, Zhenbo Xiang, Qiang Ren
In this study, V2O5 nanoparticles with flake or prism-like morphology were synthesized using a two-step solvothermal synthesis and calcination process for the first time. These nanoparticles exhibited intrinsic oxidase-like activity, catalyzing the oxidation of 3,3′,5,5′-tetramethylbenzidine to produce blue oxidized 3,3′,5,5′-tetramethylbenzidine even in the absence of H2O2, with a characteristic absorption
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Investigation of collector desorption behavior on the coal surface during flotation conditioning Asia Pac. J. Chem. Eng. (IF 1.8) Pub Date : 2024-04-17 Fengwei Li, Yong Zhang, Hongzheng Zhu, Gaochao Pan, Xiaojian Wang, Kun Chen, Zhanbei Ou
Mechanical stirring during the flotation conditioning process is a commonly employed and efficient method to enhance the effectiveness of slurry conditioning. However, excessive stirring intensity can lead to the desorption of collectors from the surface of coal slurry particles, compromising the conditioning efficacy. Thus, determining the optimal range of stirring intensity to enhance conditioning
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Synthesis of biomass‐derived ethyl levulinate from steam‐exploded corn straw Asia Pac. J. Chem. Eng. (IF 1.8) Pub Date : 2024-04-16 Haoran Zhao, Yu Jia, Yihang Chen, Xuanyu Liang, Jinbo Hao, Binglin Chen, Chao He, Liang Liu, Chun Chang, Guizhuan Xu
Ethyl levulinate (EL) production from steam‐exploded corn straw (SCS) in a cascade of reaction using a Brønsted (B) acid and a Lewis (L) acid in ethanol was studied. The entangled structure of corn straw could be obviously damaged through steam explosion when the pressure was 1.5 MPa holding 10 min. The content of cellulose can be increased from 35.9% to 46.8%, and the contents of hemicellulose and
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Catalytic and noncatalytic CO2 abs‐desorption studies of MEA‐TETA‐DEEA/MEA‐TETA‐AMP tri‐solvents at specific blended ratios Asia Pac. J. Chem. Eng. (IF 1.8) Pub Date : 2024-04-15 Yan Wei, Huancong Shi, Jing Jin, Yingli Ge, Yongcheng Feng
To discover the “coordinative effect” within MEA‐polyamines, the non‐catalytic CO2 absorption‐desorption tests were conducted within tri‐solvents of “MEA‐TETA (triethylenetetramine)‐DEEA (N, N‐diethylethanolamine)/AMP(2‐amino‐2‐methyl‐1‐propanol)” at specific concentrations of .1 ~ .5 + 2 + 2 mol/L for the first time. The energy efficient combinations were detected of MEA‐TETA based tri‐solvents with
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A novel hybrid forecasting approach for NOx emission of coal‐fired boiler combined with CEEMDAN and self‐attention improved by LSTM Asia Pac. J. Chem. Eng. (IF 1.8) Pub Date : 2024-04-11 Hua Yan, Yunchi Chen, Bin Yang, Yang Yang, Hu Ni, Ying Wang
The precise prediction of NOx generation concentration in coal‐fired boilers serves as the foundational cornerstone for the judicious optimization and control of selective catalytic reduction denitrification (SCR) systems. Owing to the intricate nature of the denitrification process within SCR, there exists a temporal delay in regulating the ammonia injection rate based on the monitored data of NOx
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Impact of chemical reaction on hybrid nanofluid (GO + MoS2) flow over an exponentially stretching sheet with Soret and Dufour effects Asia Pac. J. Chem. Eng. (IF 1.8) Pub Date : 2024-04-11 Arumugam Manigandan, Panyam Venkata Satya Narayana
The Soret and Dufour effects play a crucial role in various fields such as geosciences, groundwater pollutant migration, chemical reactor operations, binary alloy solidification, and isotope separation. This study focuses on examining the impact of mixed convective flow on hybrid nanofluid through an exponentially stretching sheet with Soret and Dufour effects. The flow is affected by factors like
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Physicochemical characterisation and kinetic modelling of wet torrefied oil palm trunk in pyrolysis condition Asia Pac. J. Chem. Eng. (IF 1.8) Pub Date : 2024-04-08 Yu Si Wang, Frederick Jit Fook Phang, Megan Soh, Jiuan Jing Chew, Agus Saptoro, Jaka Sunarso
Over 218 million tonnes of oil palm trunks (OPT) waste is produced annually by Malaysian oil palm industry, which can be converted to biofuels via wet torrefaction. This study assessed the fuel characteristics of wet torrefied OPT (WT‐OPT) using proximate analysis, higher heating value (HHV) analysis, Fourier transform infrared spectroscopy (FTIR), and scanning electron microscopy–energy dispersive
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Evaluation of mechanical, permeation, and degradation properties of poly(hydroxybutyrate) blends for sustainable packaging Asia Pac. J. Chem. Eng. (IF 1.8) Pub Date : 2024-04-04 Simran Ahuja, Amisha Verma, Sanjiv Arora
This study explores the development of environmentally sustainable, high-quality packaging materials by incorporating poly(hydroxybutyrate) (PHB) with different polymers. To accomplish this objective, pure PHB was blended with poly(ethylene glycol) (PEG) in a precise 9:1 ratio. Subsequently, this blend was further combined with 50 wt% of various polymers, namely, polycaprolactone, poly(vinylacetate)
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Enhancing coal slime processing: Investigating the efficacy of sodium dodecyl sulfonate in the adsorption on kaolinite surfaces Asia Pac. J. Chem. Eng. (IF 1.8) Pub Date : 2024-04-05 Fangqin Lu, Lingyun Liu, Chuilei Kong, Hongyu Zhao
Addressing the issue of processing fine kaolinite and quartz particles in coal slime, this study utilized molecular simulation and Density Functional Theory (DFT) to investigate the chelate adsorption characteristics of sodium dodecyl sulfate (SDS) on kaolinite surfaces. As a major clay mineral component in coal slime, kaolinite reduces coal's calorific value but holds potential for industrial and
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Preparation of Ti4O7/h‐BN self‐supported ceramic photoelectrode and its photoelectrocatalytic performance for water purification Asia Pac. J. Chem. Eng. (IF 1.8) Pub Date : 2024-04-03 Shanshan Li, Yanan Gong, Md Azharul Hossain, Zeqi Jiang, Jiarong Zhang, Guowen Wang, Yinghuan Fu, Pengyuan Wang, Yu Song, Hongchao Ma
The construction of high‐efficiency self‐supported ceramic photoelectrode based on ideal semiconductor materials is essential for achieving effective degradation of pollutants by photoelectrocatalysis (PEC) technology. Herein, a Ti4O7/h‐BN composite ceramic photoelectrode with a unique microstructure was fabricated by a step‐by‐step calcination process and used in PEC water pollution remediation. The
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Scale inhibition performance of carboxylic acid polymers containing ether groups in artificial seawater: Experiments and MD simulation Asia Pac. J. Chem. Eng. (IF 1.8) Pub Date : 2024-04-03 Jiajia Zhang, Xueni Sun, Hui Shao
The lowered dispersibility of carboxylic acid polymers in the seawater system with high salt content results in reduced scale inhibition efficiency. To solve this problem, a series of carboxylic acid polymers containing ether groups were prepared by free radical polymerization using α‐allyl glycerol ether (AG) and vinyl monomers containing different numbers of carboxylic acid groups (acrylic acid [AA]
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Issue Information Asia Pac. J. Chem. Eng. (IF 1.8) Pub Date : 2024-04-02
No abstract is available for this article.
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Experimental investigation on dynamic characteristics of methane/air combustion in double‐layer pellets porous media Asia Pac. J. Chem. Eng. (IF 1.8) Pub Date : 2024-04-01 Hui Wang, Ning Wang, Guangshun Wang, Xiangyu Wang, Xiang Liu, Yuxuan Zhu
The double‐layer porous media burner is considered as an effective way to realize stable lean‐burn. In order to quickly achieve a stable combustion state in a double‐layer porous media burner, this work investigated the dynamic characteristics of methane/air premixed combustion in a bench‐scale double‐layer porous media burnspanning from ignition to stable combustion and ultimately flameout. The experimental
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Research on the influence of aeration manners on the mass transfer characteristics of bubbles in multi‐column airlift photobioreactor Asia Pac. J. Chem. Eng. (IF 1.8) Pub Date : 2024-04-01 Shuangcheng Fu, Chenxi Liu, Faqi Zhou, Tao Yu, Kewei Li, Yue Zhang, Shenghu Yan, Xiang Zhang
Mass transfer of bubbles is important in microalgae cultivation. In this study, aiming to improve the microalgae culturing efficiency, computational fluid dynamics (CFD) was adopted to study the influence of the aeration manners on mass transfer of bubbles within ascending columns in multi‐column airlift photobioreactor (PBR) and the hydrodynamic conditions within the PBR under different aeration manners
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Design and hydraulic study of double‐partition dividing‐wall column Asia Pac. J. Chem. Eng. (IF 1.8) Pub Date : 2024-03-28 Shengyi Guan, Yongshuai Li, Gaoyang Li, Litao Zhu, Hui Pan, Hao Ling
Dividing‐wall column (DWC) provides tremendous advantages in terms of energy savings and capital costs for three‐component and even multi‐component separations. With increasing industrial application of three‐component DWCs, DWCs for separation of four‐component have received considerable research attention. The aim of this work is to investigate the design of the two‐staggered wall region and gas–liquid
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Laminar flame speed measurement and combustion mechanism optimization for ethylene–air mixtures Asia Pac. J. Chem. Eng. (IF 1.8) Pub Date : 2024-03-27 Lei Wang, Ruida Hou, Zixing Zhang, Yindong Song
Ethylene plays a crucial role as an intermediate component in the cracking and combustion processes of large molecular alkane and olefins. In this article, the laminar flame speed of ethylene–air mixtures was measured using the heat flux method. The mechanism of ethylene was simplified by utilizing the error propagation directed relationship graph (DRGEP) and sensitivity analysis (SA), and the Arrhenius
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Controllable synthesis of snowflake‐like α‐calcium sulfate hemihydrate microstructures using Na2EDTA as morphology modifier Asia Pac. J. Chem. Eng. (IF 1.8) Pub Date : 2024-03-26 Lingling Lv, Yang Gao, Ming Guo, Minfu Liu, Baocun Zhang, Han Lin, Xingong Zhang, Chenguang Liu
In this work, snowflake‐like α‐CaSO4·0.5H2O (α‐CSH) hierarchical architectures were successfully synthesized by a facile one‐pot method in an ethylene glycol‐water system using Na2EDTA as a crystal morphology modifier. Characterization techniques including X‐ray diffraction (XRD), thermogravimetric (TG) analysis, differential scanning calorimetry (DSC), scanning electron microscopy (SEM), and Fourier
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Utilization of industrial by‐product gypsum to prepare urea gypsum cocrystals as a sustained release fertilizer: A review Asia Pac. J. Chem. Eng. (IF 1.8) Pub Date : 2024-03-25 Jiang Zhao, Caiyun Jia, Xiaoxia Fang, Anni Xiao, Haijun Zhang
The large‐scale accumulation of industrial by‐product gypsum has led to land embezzlement and serious environmental pollution. Meanwhile, as a predominantly used nitrogen fertilizer, urea shows a disadvantage of high solubility in soil. Therefore, it can hydrolyze into large amounts of ammonium salts so rapidly that cannot be absorbed efficiently by crops. The sustainable method of using industrial
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Statistical physics modelling of adsorption isotherms of water vapour on shale: Stereographic, energetic and thermodynamic investigations Asia Pac. J. Chem. Eng. (IF 1.8) Pub Date : 2024-03-22 Shuo Duan, Shiyu Shen, Guodong Li, Xiangyang Ling, Pengfei Shen
Understanding the mechanisms of shale–water interaction by water vapour adsorption is crucial for predicting shale gas productivity. In this study, equilibrium adsorption data of water vapour on four different shales of the Sichuan Basin at three temperatures (298, 308, and 318 K) were measured using static gravity techniques. The water vapour adsorption isotherms were simulated by three statistical
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Dividing‐wall column for separating wide boiling mixture: Optimal design and servo control strategy Asia Pac. J. Chem. Eng. (IF 1.8) Pub Date : 2024-03-22 Md Aurangzeb, Sudip Banerjee, Subhankar Roy, Ravi Tejasvi
The dividing‐wall column (DWC) stands as an energy‐efficient distillation technology designed to efficiently separate ternary systems into their pure components within a single column. Despite its efficiency, integrating two towers into a DWC poses challenges in controllability. Published studies have focused on developing controllers for disturbance rejection but have not addressed the issue of servo
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Effects of air inlet and outlet on thermal management of electric vehicle battery pack equipped with fins Asia Pac. J. Chem. Eng. (IF 1.8) Pub Date : 2024-03-21 Jie Yu, Yunsen Zhang, Cong Qi, Lin Liang
To solve the high heat dissipation problem of lithium ion battery, the air‐cooled heat dissipation with fins is adopted for the thermal management. Heat dissipation characteristics of two types of air inlets and outlets (single air inlet and outlet, and double air inlet and outlet) and two types of surfaces (smooth and fin structure) were simulated and compared. When the air inlet and outlet are single
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K2CO3 on porous supports for moisture‐swing CO2 capture from ambient air Asia Pac. J. Chem. Eng. (IF 1.8) Pub Date : 2024-03-18 Shiqiang Zheng, Xinyue Cheng, Wenjia Zhou, Tong Wang, Liangliang Zhu, Hang Xiao, Xi Chen
Direct air capture (DAC) of CO2 is an important technology to mitigate mobile carbon emissions, reduce atmospheric CO2 concentration, and cope with climate change. Moisture‐swing adsorption is regarded as one of the most promising technologies in DAC due to its low energy consumption and ease of operation. In this work, a cheap and easily available moisture‐swing adsorbent of potassium carbonate loaded
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Kinetics of microwave carbothermal reduction of Sb2O3: Isothermal and non‐isothermal microwave thermogravimetric analysis Asia Pac. J. Chem. Eng. (IF 1.8) Pub Date : 2024-03-13 Qinsheng Yang, Chenhui Liu, Xiongjin Zhu, Chandrasekhar Srinivasakannan, Yingwei Li, Ying Dai
Kinetics of antimony production via carbothermal reduction of Sb2O3–carbon powder–NaCl mixture using microwave and conventional heating was investigated to identify the dominant controlling mechanism. Results of conventional heating revealed the temperature range of conventional carbothermal reduction reaction is 500°C to 800°C, with the average activation energy of each stage being 81.97 kJ/mol (α
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Microencapsulation of pyriproxyfen using the particles from gas‐saturated solutions process as a controlled‐release system Asia Pac. J. Chem. Eng. (IF 1.8) Pub Date : 2024-03-11 Tanjina Sharmin, Hiroyuki Tashiro, Hiroki Sakai, Kouichiro Shibata, Konoka Ema, Keiichi Irie, Tomomitsu Satho, Kenji Mishima
The purpose of this investigation was to determine whether pyriproxyfen (PPF), a synthetic juvenile hormone analog (JHA), could be encapsulated in supercritical carbon dioxide (scCO2) using the process particles from the gas‐saturated solutions (PGSS) for a controlled‐release system. The PGSS process represents a promising two‐step production system especially suited for the encapsulation and controlled‐release
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Motion and interaction of in‐line bubbles in quiescent non‐aqueous solutions of hydrocarbon resin Asia Pac. J. Chem. Eng. (IF 1.8) Pub Date : 2024-03-08 Li Mei, Denghan Luo, Zhongyao Zhang, Xiaopeng Chen, Lifang Huang, Jiezhen Liang, Xiaojie Wei, Bei Liu, Linlin Wang
Hydrocarbon resin (HR) is an essential fine chemical. The preparation and application process of HR involves lots of gas–liquid heterogeneous reactions, and the bubbly flow behavior influences them significantly. Using high‐speed photography and digital image processing techniques, the motion and interaction of in‐line bubbles in non‐aqueous solutions of HR are examined in this article. The results
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Flow stirred by open turbine: A modal analysis of multiscale flow characteristics Asia Pac. J. Chem. Eng. (IF 1.8) Pub Date : 2024-03-05 Jie Jin, Shaoyang Bu, Ying Fan, Jianjun Han, Kuangdi Yin, Wenyi Chen
The turbulence observed in the stirred tank is a result of the superposition of flows at different scales, each exerting various influences on the operational processes. To understand the flow characteristics associated with stirring, this paper undertakes particle image velocimetry (PIV) experimental research on an unbaffled tank stirred by an open turbine featuring four distinct blade deflection
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Preparation of hollow carbon nanospheres from oxidation of spent tyre oil‐derived carbon black in air Asia Pac. J. Chem. Eng. (IF 1.8) Pub Date : 2024-03-04 Chiemeka Onyeka Okoye, Zhezi Zhang, Dongke Zhang
Hollow carbon nanospheres (HCNS) were prepared from carbon black (CB) derived from spent tyre pyrolysis oil. The pristine CB produced by partial oxidation of the pyrolysis oil in a drop tube furnace was subsequently oxidised in air in a fixed bed reactor to yield HCNS. The effect of oxidation temperature (300 to 700°C) and time (1 to 8 h) on the burn‐off (Bt) of the sample over the duration (t) of
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Promoted catalytic performance of sugarcane bagasse ash supported by γ‐alumina as efficient, stable, and ecofriendly catalyst for dehydration of methanol to dimethyl ether Asia Pac. J. Chem. Eng. (IF 1.8) Pub Date : 2024-03-04 Abd El‐Aziz A. Said, Mohamed N. Goda, Mohamed M. M. Abd El‐Wahab, Nadia O. El‐Gamal, Mohamed Abd El‐Aal
The aim of this study was to use different proportions (1% to 20% by weight) of γ‐alumina to modify sugarcane bagasse ash (SCBA) for the production of dimethyl ether (DME) through the dehydration of methyl alcohol. A simple precipitation method was utilized to fabricate (1–20 wt.%) Al2O3/SCBA catalysts. X‐ray fluorescence, X‐ray diffraction, Fourier‐transform infrared spectroscopy, transmission electron
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Three‐dimensional simulation of dripping and jetting phenomenon in a flow‐focusing geometry Asia Pac. J. Chem. Eng. (IF 1.8) Pub Date : 2024-02-27 Saikat Biswas, Partho S. G. Pattader, Tapas K. Mandal
3D simulations have been achieved on a flow‐focusing geometry employing the VOF method to study the consequence of viscosity, surface tension, wettability, and geometry on drop generation for the dripping regime. Here the dispersed phase is the PDMS oil (polydimethylsiloxane), and the continuous phase is the water. Simulations were performed at different oil‐to‐water viscosity ratios of 3, 12, 27,
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The production of bacterial cellulose from coconut water and its application as a green photocatalyst composite membrane Asia Pac. J. Chem. Eng. (IF 1.8) Pub Date : 2024-02-27 Tintin Mutiara, Ajeng Catra Jingga, Amanda Zulfa Widya
In this research work, bacterial cellulose was produced from the fermentation of coconut water and incubated for 4, 5, and 6 days. The bacterial cellulose membrane was utilized as immobilized silver nanoparticles (AgNPs). A green photocatalyst membrane was prepared by reducing silver ions in the bacterial cellulose matrix structure using local fruit extracts, tomatoes, Citrus hystrix fruit, and mangosteen
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Effects of coal gangue on the ash initial deformation temperature and gasification characteristic of biomass Asia Pac. J. Chem. Eng. (IF 1.8) Pub Date : 2024-02-25 Hongli Fan, Fenghai Li, Mingxi Guo, Guopeng Han, Qianqian Guo, Meiling Xu
The effects of coal gangue (CG) on the ash initial deformation temperature (IDT) and CO2 gasification characteristic of biomass (chestnut shell [CS] and soybean straw [SS]) were investigated by ash fusion tester and thermogravimetric analyzer, respectively. The IDTs of CS and SS ashes were low because of the presence of abundant low melting point (MP) airchildite (K2Ca(CO3)2) and arcanite (K2SO4),
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Density and viscosity of deep eutectic solvents at different temperatures and compositions: Measurement and prediction model Asia Pac. J. Chem. Eng. (IF 1.8) Pub Date : 2024-02-21 Haiou Wang, Yinuo Wang, Shizhuo Wang, Hongjuan Li, Sheng Peng, Yatao Wang, Hao Li, Jing Fang
Deep eutectic solvents (DESs) are becoming increasingly promising as environmentally friendly solvents, and accurate prediction of their density and viscosity is crucial for their successful industrial application. However, existing density and viscosity prediction models primarily rely on temperature variations and often overlook changes in the molar ratio of hydrogen bond acceptors (HBA) to hydrogen
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Enhancement in kerosene droplet–coal particle collision and adsorption by bubble trailing vortex in coal slurry conditioning: Energy evolution of collision process Asia Pac. J. Chem. Eng. (IF 1.8) Pub Date : 2024-02-20 Hongzheng Zhu, Zhiqian Qin, Kun Chen, Wenliang Zhu, Qinghui Shi, Ming Yang, Chao Li, Yong Zhang
Understanding the collision between kerosene droplets and coal particles in the bubble trailing vortex region is crucial for enhancing slurry conditioning. We found the area of the bubble trailing vortex region increased as the bubble size increased via the Fluent 6.3.26 software. A kerosene droplet velocity range of 0.074–0.106 m/s and a coal particle velocity range of 0.062–0.104 m/s were obtained
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Issue Information Asia Pac. J. Chem. Eng. (IF 1.8) Pub Date : 2024-02-16
No abstract is available for this article.
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Study on the equilibrium constants and initial formation temperature of NH4HSO4 and (NH4)2SO4 in coal-fired flue gas Asia Pac. J. Chem. Eng. (IF 1.8) Pub Date : 2024-02-15 Xinfeng Yu, Zhuo Chen, Wentao Du, Rongyu Shao, Hao Zhou
With the development and utilization of high-sulfur coal, generating ammonium bisulfate (ABS) and ammonium sulfate (AS) during the coal combustion process has garnered increasing attention. This study examined the formation of ABS and AS under varying temperatures and different initial reactant ratios of SO3 and NH3 by establishing a self-constructed experimental setup. Based on the experimental data
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Cu-modified Fe-Mn magnetic mercury adsorbent and anti-SO2 characteristic Asia Pac. J. Chem. Eng. (IF 1.8) Pub Date : 2024-02-14 Yu Shang, Ruhao Gong, Yufeng Duan, Qiang Zhou
A series of Fe6Mn1Cux adsorbents for mercury removal were prepared by using co-precipitation and impregnation methods. The performance of mercury adsorption and anti-SO2 characteristic was studied in a fixed-bed experimental system. The effect of Cu doping amount, reaction temperature, and flue gas components on mercury removal was investigated. The mercury species on the spent adsorbent was analyzed
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Synthesis of alkynyl alcohol derivatives and its corrosion inhibition on N80 steel in 5 M HCl Asia Pac. J. Chem. Eng. (IF 1.8) Pub Date : 2024-02-13 Sheng Tu, Pengxi Li, Lunhong Ai, Qi Tang
Alkynyl alcohol derivatives (N-14) were synthesized by 2-chloromethyl pyridine, propargyl alcohol and bromotetradecane and the structure was confirmed by 1H NMR, 13C NMR, MS and FTIR. The corrosion inhibition performance was evaluated by weight loss, Tafel polarization, EIS measurements and DFT quantum calculations. The results proved that N-14 effectively inhibited the acid corrosion of N80 steel
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Balancing strength and sustainability: Incorporating recycled tyres and pawpaw fibre in polystyrene composites Asia Pac. J. Chem. Eng. (IF 1.8) Pub Date : 2024-02-06 Adewale George Adeniyi, Sulyman Age Abdulkareem, Mubarak A. Amoloye, Ebuka Chizitere Emenike, Abdelrahman O. Ezzat, Kingsley O. Iwuozor, Hamad A. Al-Lohedan, Favour Taiye Aransiola, Ifeoluwa Peter Oyekunle
The study presents the development and characterization of rubberized fibrillated polystyrene composites using recycled rubber tires and pawpaw fibres. The composites were prepared by varying the proportions of rubber and fibre. FTIR, SEM, EDX and hardness testing were used to characterize the composites. FTIR spectroscopy revealed distinct peaks, including hydroxyl and amine, but with a notable absence
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Study on thermodynamic response in liquefied natural gas storage tanks under static pressurization and sloshing conditions Asia Pac. J. Chem. Eng. (IF 1.8) Pub Date : 2024-02-05 Xinshan Sun, Zhan Liu, Wenlong Xue, Yunfan Yang
Liquefied natural gas (LNG) is becoming a potential power fuel in ocean transport and will be widely utilized in the near future. However, severe thermodynamic imbalance issues, caused by environmental heat leakage and external sloshing disturbances, must to be efficiently addressed to improve the operation reliability and safety storage of LNG fuel tanks. In this paper, a comprehensive theoretical
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Kinetic study of the reduction reaction of red mud and CO under fluidization condition Asia Pac. J. Chem. Eng. (IF 1.8) Pub Date : 2024-02-05 Hao Kong, Tuo Zhou, Zhe Wang, Chaoran Li, Man Zhang, Hairui Yang
Pyrometallurgical method of iron recovery from red mud (RM) has advantages of simple procedures, high recovery efficiency and significant waste minimization. The fluidization reduction process using CO as reductant addresses the issues of high energy consumption and long reaction time of pyrometallurgical method. In order to optimize the operational conditions of the fluidization reduction process
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Numerical simulation on adsorption of CO2 using K2CO3 particles in the bubbling fluidized bed Asia Pac. J. Chem. Eng. (IF 1.8) Pub Date : 2024-02-05 Shuyan Wang, Guangjun Kuang, Baoli Shao, Xi Chen, Lei Xie, Yimei Ma
With the increase of greenhouse gas emissions, global warming has become an urgent problem, and the use of solid adsorbents to capture CO2 gas in flue gas has attracted more and more attention. In this study, the process of CO2 capture by K2CO3 particles in the bubbling fluidized bed (BFB) is numerically simulated with Eulerian–Eulerian(E–E) two fluid model incorporating with the kinetic theory of
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Evaluation on thermal pyrolysis of biomass straw waste: Focusing aspects of products yields, syngas emissions and solid products characterization Asia Pac. J. Chem. Eng. (IF 1.8) Pub Date : 2024-02-05 Xiwen Yao, Haodong Zhou, Pengyuan Qi, Kaili Xu
In this study, a systematic and quantitative investigation of the pyrolysis characteristics of biomass was conducted in a fixed-bed tubular reactor, and the influence of pyrolysis temperature on product yields, gas emission characteristics, and syngas compositions as well as physicochemical characterization of resulting solids (i.e., char/ash morphologies, mineral transformations, and elemental compositions)
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Hydrodynamic analysis of nanofluids flow over 45° inclined porous square cylinder using Darcy–Brinkman–Forchheimer model Asia Pac. J. Chem. Eng. (IF 1.8) Pub Date : 2024-02-05 Jaspinder Kaur, Jatinder Kumar Ratan, Roderick Melnik, Anurag Kumar Tiwari
Various engineering applications commonly involve the flow of nanofluids over a porous 45° inclined square cylinder. Therefore, the current study is to assess the impact of the Darcy parameter (Da), nanoparticle volume fraction (ϕ), and Reynolds number (Re) on the momentum transport characteristics over the 45° inclined porous square cylinder. The governing equations were solved numerically using the
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First-principles study on the surface properties and floatability of magnesite tailings and its main gangue Asia Pac. J. Chem. Eng. (IF 1.8) Pub Date : 2024-02-04 Zhonghua Xue, Yali Feng, Haoran Li, Jun Yang, Mengyao Liu, Yufeng Cui
The accumulation of magnesite tailings (MT) poses challenges such as resource wastage, land occupation, dust generation, and environmental pollution, thereby jeopardizing both physical and mental health. Urgent attention is required for the proper treatment of this solid waste material. An in-depth investigation into enhancing the flotation processes of MT is essential. A comprehensive comprehension
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Analytical modeling of particle size effect on impact wear deformation characteristics of ductile materials Asia Pac. J. Chem. Eng. (IF 1.8) Pub Date : 2024-02-01 Xuewen Cao, Junwen Chen, Xuerui Zang, Jiaxin Feng, Wenshan Peng, Xiaoyang Sun, Jian Hou, Jiang Bian
This study aims to analytically predict the material impact wear rate and improve the prediction accuracy and applicability of existing impact wear prediction models. The ABAQUS software was used to numerically model and analyze the erosion pit morphology and stress distribution characteristics. Micromorphological testing was used to investigate the impact wear damage mechanism, and an improved impact
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Stability and thermodynamic property of TiO2/R141b nanorefrigerants by multi-objective optimization Asia Pac. J. Chem. Eng. (IF 1.8) Pub Date : 2024-01-28 Ming Xing, Yuling Zhai
Utilizing nanorefrigerants as working fluids can significantly enhance the energy efficiency of low-temperature waste heat recovery systems (≤ 50°C). Refrigerants with low viscosity and density require a substantial amount of surfactant to maintain a stable suspension of nanoparticles. However, the excessive use of surfactants, which have a notably low thermal conductivity, could lead to foam generation
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Application of PC-SAFT EoS and SCFT for the modeling of thermophysical properties comprising deep eutectic solvent and alcohols Asia Pac. J. Chem. Eng. (IF 1.8) Pub Date : 2024-01-28 Ncomeka Mgxadeni, Bakusele Kabane, Ariel Hernández, Indra Bahadur, Faruq Mohammad, Ahmed Abdullah Soleiman, Hamed Hashemi, Mwadham M. Kabanda
Zinc (II) chloride based deep eutectic solvent (DES) were formed by mixing zinc (II) chloride with phosphoric acid. Fourier-transform infrared spectroscopy was used to identify any possible shifts when the two compounds were assorted, and differential scanning calorimetry (SDT Q600 V20.9 Build 2D) was utilized to evaluate the formation of deep eutectic solvent. Densities, ρ $$ \uprho $$ , and speed
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Synthesis of mesocarbon microbeads from high-temperature coal tar pitch: Effects of quinoline insoluble Asia Pac. J. Chem. Eng. (IF 1.8) Pub Date : 2024-01-25 Gu Zishuo, Wang Fei, Wang Yunyang, Fang Yilin, Zhu Yaming, Lv Jun, Cheng Junxia, Wang Ying, Zhao Xuefei
Mesocarbon microbeads (MCMBs) were a kind of functional artificial carbon materials, which was widely used in varied areas with its excellent properties. MCMB was generally produced by thermal-polymerization of high-temperature coal tar pitch under oxygen-free atmosphere. Generally, the content of primary quinoline insoluble (PQI) play a key role on the quality of the derived MCMB. In order to confirm
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Efficient separation and recovery of Co and Ni from ammonium sulfate roasting-water leaching solutions of oceanic cobalt-rich crusts by sulfide precipitation and P507–Cyanex 272 synergistic extraction Asia Pac. J. Chem. Eng. (IF 1.8) Pub Date : 2024-01-21 Jinrong Ju, Yali Feng, Haoran Li, Zhonghua Xue, Jun Yang, Xingquan Du
Oceanic cobalt-rich crusts contain many valuable metals including Co, Ni, Cu, and Mn, of which Co and Ni are scarce metal resources on terrestrial land. Co, Ni, Cu, and Mn in cobalt-rich crusts can be efficiently extracted by the ammonium sulfate roasting-water leaching (ARWL) process, but separating and recovering Co and Ni from the leaching solution containing high concentrations of Mn is a challenging
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Operational process stability in pilot dry anaerobic digester of source-sorted organic fraction municipal solid waste Asia Pac. J. Chem. Eng. (IF 1.8) Pub Date : 2024-01-16 Afifi Zainal, Razif Harun, Liyana Yahya, Syazwani Idrus
The organic fraction of municipal solid waste (OFMSW) is a major portion of solid waste in Malaysia, with 44.5% of the total waste being food waste-derived sources. This study investigates the performance of dry anaerobic digester (DAD) operation using the pilot dry anaerobic digester (PDAD), a plug flow reactor, in treating source-sorted organic fraction municipal solid waste (SS-OFMSW) for biogas
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A study on the performance of a swirling–straight composite nozzle Asia Pac. J. Chem. Eng. (IF 1.8) Pub Date : 2024-01-15 Dongxing Yu, Shuchao Li, Jun Zhang, Ning Wang, Zongyu Ling
The nozzle is the key component of water mist fire extinguishing system. As a response to the problems of small injection angle associated with straight jet nozzles and the weak axial momentum of swirl nozzles, a swirling–straight composite nozzle is designed in this work. The comparison with a straight jet nozzle and a pressure swirl nozzle shows that the swirling–straight composite nozzle has a larger
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Study on characteristics and mechanism of re-entrainment in intake filtration components of the gas turbine Asia Pac. J. Chem. Eng. (IF 1.8) Pub Date : 2024-01-14 Yunda Fei, Jianhua Wang, Yanming Liu, Shijun Sun
Aiming at the problem that the droplet re-entrainment in the intake filtration components affects the gas intake quality and the safe operation of gas turbines, the characteristics and mechanism of the re-entrainment in a marine double-hook inertial stage filter are studied, and the distribution of liquid film and re-entrainment under different inlet air velocities and droplet size distributions are
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Indirect solution modeling of melting behavior of SiO2 based on the image processing technology Asia Pac. J. Chem. Eng. (IF 1.8) Pub Date : 2024-01-11 Cunhao Lu, Yi Zhang, Jiayi Zhang, Weixiang Sun, Anying Xia, Mingli Zhang, Jian Chen
The utilization of tempered blast-furnace slag through the direct fiber forming process to produce high-value thermal insulation materials offers a dual benefit: it efficiently utilizes the latent heat in the unused slag and significantly increases the value of blast-furnace slag utilization. However, measuring the melting properties of iron slag at high temperatures is challenging. In this study,
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Influence of ionomer concentration and membrane thickness on membrane electrode assembly in alkaline fuel cell performance Asia Pac. J. Chem. Eng. (IF 1.8) Pub Date : 2024-01-07 Nur Ubaidah Saidin, Omar Syah Jehan, Kok Seng Leong, Thye Foo Choo, Wai Yin Wong, Kee Shyuan Loh, Rozan Mohamad Yunus
The alkaline fuel cell is subject to extensive research owing to its fast kinetic response relative to acidic media. However, the efficiency of the catalytic layer at the electrodes depends on the amount and distribution of ionomers present there. It is crucial to have the right ionomer concentration to have the best cell performance. Additionally, the membrane thickness is a significant parameter
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Study on the combination of the annular jet pump and static mixer to improve the fluid-carrying capacity of gas wells Asia Pac. J. Chem. Eng. (IF 1.8) Pub Date : 2024-01-07 Huizhen Liang, Chengzhen Li, Jian Ma, Lin Mu
Aiming at the problem that the suction chamber of the gas-driven jet pump has insufficient mixing of the power gas and the sucked fluid leading to efficiency reduction, this study proposes to effectively combine the static mixer with the annular jet pump and design a new type of annular jet pump and apply it to the gas wells to improve the fluid recovery capacity. Numerical simulations based on the