Abstract The main objective of this work was to study BTX production for bituminous coal pyrolysis using co-modified HZSM-5 catalysts. A tube furnace reactor, and a thermogravimetric analyzer coupled with a mass spectrometer analyzer (TG-MS) were used to perform the pyrolysis characteristics of Ningxia bituminous coal with and without a catalyst. The collected products were determined by using a gas chromatography-mass spectrometry analyzer (GC–MS). In addition, an XRD analyzer and an N2-physical adsorption analyzer were employed to evaluate the Fe2O3/MoSi2 co-modified HZSM-5 catalyst. The results show that adding metal components into HZSM-5 improved the BTX production from bituminous coal pyrolysis, and the activity order of the catalysts was Fe2O3-MoSi2/HZSM-5> Fe2O3/HZSM-5 > MoSi2/HZSM-5>HZSM-5. The weight loss of coal increased by 10 % during pyrolysis in the presence of 10 wt.% (Fe2O3-MoSi2)/HZSM-5 catalyst with a Fe2O3/MoSi2 mass ratio of 1:1. The conversion rate of coal char was significantly increased, and especially the increase in the relative content of BTX products was 254 % in the liquid phase. In addition, the Ea of coal was lower by 8.253 kJ/mol during catalytic pyrolysis in the range of 350–600 ℃. A significant synergistic effect was observed between Fe2O3 and MoSi2 compositions on the production of BTX. A relative content and mass yield of 59.66 area% and 7.78 mg/(g·coal) of BTX were respectively achieved during the bituminous coal catalytic pyrolysis.

中文翻译：

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Fe2O3/MoSi2-HZSM-5催化剂促进烟煤热解生产BTX

摘要 这项工作的主要目的是研究使用共改性 HZSM-5 催化剂生产烟煤热解 BTX。采用管式炉反应器、热重分析仪与质谱分析仪（TG-MS）联用对宁夏烟煤加催化剂和不加催化剂的热解特性进行了研究。通过使用气相色谱-质谱分析仪（GC-MS）测定收集的产物。此外，采用XRD分析仪和N2-物理吸附分析仪评估Fe2O3/MoSi2共改性HZSM-5催化剂。结果表明，在HZSM-5中加入金属组分提高了烟煤热解BTX的产量，催化剂活性顺序为Fe2O3-MoSi2/HZSM-5>Fe2O3/HZSM-5>MoSi2/HZSM-5>HZSM- 5. 在 Fe2O3/MoSi2 质量比为 1:1 的 10 wt.% (Fe2O3-MoSi2)/HZSM-5 催化剂存在下，煤热解过程中的重量损失增加了 10%。煤焦的转化率显着提高，尤其是液相中BTX产品的相对含量提高了254%。此外，在350-600 ℃范围内催化热解过程中，煤的Ea降低了8.253 kJ/mol。观察到 Fe2O3 和 MoSi2 组合物对 BTX 生产的显着协同作用。烟煤催化热解过程中BTX的相对含量和质量收率分别为59.66面积%和7.78 mg/(g·煤)。尤其是液相中 BTX 产品的相对含量增加了 254%。此外，在350-600 ℃范围内催化热解过程中，煤的Ea降低了8.253 kJ/mol。观察到 Fe2O3 和 MoSi2 组合物对 BTX 生产的显着协同作用。烟煤催化热解过程中BTX的相对含量和质量收率分别为59.66面积%和7.78 mg/(g·煤)。尤其是液相中 BTX 产品的相对含量增加了 254%。此外，在350-600 ℃范围内催化热解过程中，煤的Ea降低了8.253 kJ/mol。在 Fe2O3 和 MoSi2 组成之间观察到显着的协同效应对 BTX 的生产。烟煤催化热解过程中BTX的相对含量和质量收率分别为59.66面积%和7.78 mg/(g·煤)。