期刊
CHEMCATCHEM
卷 11, 期 6, 页码 1681-1688出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/cctc.201801937
关键词
Syngas; Bifunctional catalysis; Aromatics; Reaction-coupling
资金
- National Key Research and Development Program of Ministry of Science and Technology [2017YFB0602201]
- National Natural Science Foundation of China [91545203, 21673188, 21503174, 21433008, 21872112, 21403177]
- Fundamental Research Funds for the Central Universities [20720170025]
- Shaanxi Coal and Chemical Technology Institute Co., Ltd.
Direct conversion of syngas to aromatics is an extremely challenging target due to the complex reaction pathways. Herein, we present a well-designed bifunctional catalyst composed of Mo-doped ZrO2 nanoparticles and zeolite H-ZSM-5 for one-step conversion of syngas to aromatics. The Mo-ZrO(2 )converts syngas to methanol as reaction intermediate, which can be successively converted to aromatics by H-ZSM-5. Hydrogenation ability of mixed oxides is pivotal to both selectivity and productivity of aromatics. We intensively clarify the individual role of catalyst components among CO activation, H-2 activation and aromatization. With a Mo/Zr molar ratio of 1:68, the Mo - ZrO2/H-ZSM-5 resulted in 76% selectivity of aromatics at 22% CO conversion, and the productivity of aromatics reached 0.17 g g(cat)(-1)h(-1) at 400 degrees C and 4 MPa. Moreover, the distribution of aromatics can be tuned by surface modification of H-ZSM-5.
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