In this research, zeolite ZSM-12 with Si/Al ratio = 80 was synthesized by hydrothermal method. The synthesized zeolite ZSM-12 was modified using Fe and Ga metals and a combination of these two metals, 1 % iron metals (Z80-Fe) and 1 % gallium metals(Z80-Ga), and a 2 % combination of these two metals (Z80-Fe-Ga). The physicochemical properties of synthesized zeolites were evaluated and compared by XRD, EDX-dot-mapping, NH3-TPD, BET, FT-IR, and TGA analyses. The catalytic assessment of synthesized zeolites in the HTO (n-hexane to olefins) process in a fixed bed reactor under atmospheric pressure and Weight hourly space velocity (WHSV) equal to 4 h at 550 °C was evaluated. Various parameters such as selectivity towards light olefins, propylene to ethylene (P/E ratio), production of light alkanes, and aromatic compounds (BTX) were investigated. The results show that using metals led to the improvement and adjustment of the acid sites of zeolite, and the highest amount of light olefin and the lowest amount of coke were obtained. The result of the n-hexane to olefin process showed that the yield of light olefins was significantly improved in all modified catalysts compared to parent zeolite MTW. Compared to other modified zeolites, Z80-Fe-Ga zeolite has the highest yield of light olefins, equal to 59 %. This zeolite performs better due to the presence of gallium and iron metals and shows the highest propylene selectivity (P/E = 2.4). In addition, according to the results of the TGA analysis, the content of coke on the Z80-Fe-Ga catalyst after the catalytic reaction is much less than that of other catalysts after the catalytic reactor test.

中文翻译：

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ZSM-12催化剂上金属(Fe/Ga)浸渍提高正己烷裂化催化剂活性

本研究采用水热法合成了Si/Al比=80的ZSM-12沸石。使用 Fe 和 Ga 金属以及这两种金属的组合（1% 铁金属 (Z80-Fe) 和 1% 镓金属 (Z80-Ga)）以及这两种金属的 2% 组合对合成的 ZSM-12 沸石进行改性(Z80-Fe-Ga)。通过 XRD、EDX 点图、NH3-TPD、BET、FT-IR 和 TGA 分析评估和比较合成沸石的物理化学性质。在大气压和重时空速 (WHSV) 等于 4 小时、550 °C 的固定床反应器中，对 HTO（正己烷制烯烃）过程中合成沸石的催化评估进行了评估。研究了各种参数，例如轻质烯烃的选择性、丙烯与乙烯（P/E 比）、轻质烷烃的产量和芳香族化合物（BTX）。结果表明，金属的使用导致了沸石酸位点的改善和调整，获得了最高的轻质烯烃含量和最低的焦炭含量。正己烷制烯烃过程的结果表明，与母体沸石MTW相比，所有改性催化剂的轻质烯烃产率均得到显着提高。与其他改性沸石相比，Z80-Fe-Ga沸石的轻质烯烃产率最高，为59%。由于存在镓和铁金属，这种沸石性能更好，并显示出最高的丙烯选择性 (P/E = 2.4)。另外，根据TGA分析结果，经过催化反应器测试后，Z80-Fe-Ga催化剂上催化反应后的焦炭含量远低于其他催化剂。