Engineered carbon molecular sieves (CMSs) with tapered pores, high surface area, and high total pore volume were investigated for their CO₂, CH₄, water, and acetone adsorption properties at 288.15, 298.15, 308.15 K, and pressures of <1 bar. The results were compared with BPL carbon. The samples exhibited higher adsorption capacity for CO₂ compared to BPL carbon, with Carboxen 1005 being the highest due to the presence of ultramicropores (pores smaller than 0.8 nm). Similar observations were made for CH₄ except at 288.15 K. Although the CMSs exhibited higher hydrophobicity than BPL carbon, the latter had the highest acetone uptake for all investigated temperatures due to its higher oxygen content, which facilitates stronger interactions with polar VOC molecules. Heats of adsorption were calculated using the Clausius–Clapeyron equation after fitting the isotherms with the dual-site Langmuir–Freundlich model, and results largely corroborated the order of adsorption capacities of CO₂, CH₄, and water on the carbon materials.

中文翻译：

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CO2、CH4、水和丙酮在锥形多孔碳分子筛上的单组分吸附平衡

研究了具有锥形孔、高表面积和高总孔体积的工程碳分子筛 (CMS)在 288.15、298.15、308.15 K 和 <1 bar 压力下的CO ₂、CH ₄ 、水和丙酮吸附性能。结果与 BPL 碳进行了比较。与BPL碳相比，样品对CO ₂表现出更高的吸附能力，其中Carboxen 1005由于存在超微孔（孔径小于0.8 nm）而最高。_{除了 288.15 K 外，对 CH 4}也进行了类似的观察。虽然 CMS 表现出比 BPL 碳更高的疏水性，但后者在所有研究温度下具有最高的丙酮吸收率，因为其氧含量较高，有利于与极性 VOC 分子更强的相互作用。用双位点Langmuir-Freundlich模型拟合等温线后，利用Clausius-Clapeyron方程计算吸附热，结果很大程度上证实了碳材料上CO ₂、CH ₄和水的吸附能力顺序。