Catalysis Communications ( IF 3.7 ) Pub Date : 2019-01-02 , DOI: 10.1016/j.catcom.2019.01.001 Hui Xu , Minzhe Li , Muhammad Asif Nawaz , Dianhua Liu
Direct synthesis of aromatics from syngas is a split-new research direction of coal-to-chemicals industry over the years. The effects of Zn and K on FeZr catalysts combined with Ni modified zeolite (Ni/HZSM-5) were investigated for the reaction. Modified catalysts exhibited excellent catalytic activity, showing superior selectivity of aromatic products (more than 82% in C5+ hydrocarbons) under stable CO conversion over 90%. The results demonstrated that catalyst structure could be adjusted by controlling Zn content and the acidic properties could be regulated by introducing K as a promoter. Finally, the total aromatic selectivity was conclusively ascended to 39.48%, with a controlled selectivity of CO2 lower than 25%.
中文翻译:
FeZr-Ni / ZSM-5中K和Zn元素的掺杂:合成气转化为芳烃的高选择性催化剂
从合成气直接合成芳烃是多年来煤化工行业的一个新的研究方向。研究了Zn和K对FeZr催化剂和Ni改性沸石(Ni / HZSM-5)结合反应的影响。改性的催化剂表现出优异的催化活性,在稳定的CO转化率超过90%时,芳烃产物(在C 5+烃中大于82%)表现出优异的选择性。结果表明,通过控制锌含量可以调节催化剂的结构,而引入钾作为助催化剂可以调节其酸性。最后,总芳烃选择性最终提高到39.48%,而CO 2的受控选择性低于25%。