Catalysis Letters ( IF 2.3 ) Pub Date : 2021-05-13 , DOI: 10.1007/s10562-021-03617-5 Tengfei Han 1 , Hong Xu 1 , Jianchao Liu 1 , Ligong Zhou 2 , Xuekuan Li 2 , Jinxiang Dong 1 , Hui Ge 2
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Alkylbenzenes have a wide range of uses and are the most demanded aromatic chemicals. The finite petroleum resources compels the development of production of alkylbenzenes by non-petroleum routes. One-pass selective conversion of benzene and syngas to alkylbenzenes is a promising alternative coal chemical engineering route, yet it still faces challenge to industrialized applications owing to low conversion of benzene and syngas. Here we presented a Cu–ZnO–Al2O3/ZSM-5 bifunctional catalyst which realizes one-pass conversion of benzene and syngas to alkylbenzenes with high efficiency. This bifunctional catalyst exhibited high benzene conversion (benzene conversion of 50.7%), CO conversion (CO conversion of 55.0%) and C7&C8 aromatics total yield (C7&C8 total yield of 45.0%). Characterizations and catalytic performance evaluations revealed that ZSM-5 with well-regulated acidity, as a vital part of this Cu–ZnO–Al2O3/ZSM-5 bifunctional catalyst, substantially contributed to its performance for the alkylbenzenes one-pass synthesis from benzene and syngas due to depress methanol-to-olefins (MTO) reaction. Furthermore, matching of the mass ratio of two active components in the dual-function catalyst and the temperature of methanol synthesis with benzene alkylation reactions can effectively depress the formation of unwanted by-products and guarantee the high performance of tandem reactions.
Graphic Abstract
中文翻译：
Cu-ZnO-Al 2 O 3 和 ZSM-5 继电器将苯和合成气一次性转化为烷基苯
烷基苯用途广泛，是需求量最大的芳香族化学品。有限的石油资源迫使发展非石油路线的烷基苯生产。苯和合成气一次性选择性转化为烷基苯是一种很有前景的替代煤化工路线，但由于苯和合成气转化率较低，其工业化应用仍面临挑战。在这里，我们提出了一种Cu-ZnO-Al 2 O 3 /ZSM-5双功能催化剂，该催化剂实现了苯和合成气高效单程转化为烷基苯。该双功能催化剂表现出较高的苯转化率（苯转化率50.7%）、CO转化率（CO转化率55.0%）和C7&C8芳烃总收率（C7&C8总收率45.0%）。表征和催化性能评估表明，具有良好调节酸度的ZSM-5作为Cu-ZnO-Al 2 O 3 /ZSM-5双功能催化剂的重要组成部分，极大地提高了其从烷基苯单程合成的性能。由于抑制甲醇制烯烃（MTO）反应而产生苯和合成气。此外，双功能催化剂中两种活性组分的质量比与甲醇合成与苯烷基化反应的温度相匹配，可以有效抑制不需要的副产物的形成，保证串联反应的高性能。
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