期刊
CHEMICAL SCIENCE
卷 8, 期 12, 页码 7941-7946出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c7sc03427j
关键词
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资金
- JST ACT-C [JPMJCR12YT]
- JST CREST, Japan [17-141003297]
- Natural Science Foundation of China [91645113, U1510110]
The finite petroleum resources and environmental crisis compel the development of non-petroleum carbon resources by chemical transformation routes. Syngas (CO + H-2) is a crucial junction point that exclusively bridges the non-petroleum carbon resources and other basic chemicals like alcohols, alkane/alkenes, etc. However, the one-pass conversion of syngas to value-added aromatics, especially paraxylene, is still a big challenge. Here we presented a promising hybrid catalyst, named Cr/Zn-Zn/Z5@S1, to effectively realize the one-pass conversion of syngas to para-xylene. This hybrid catalyst exhibited enhanced activity on syngas conversion (CO conversion of 55.0%), good stability of catalyst lifetime and considerable selectivity of para-xylene (27.6% in the total products and 77.3% in xylene). The characterization and catalytic performance evaluation revealed that the well-designed core-shell Zn/Z5@S1 zeolite, as a vital part of this Cr/Zn-Zn/Z5@S1 hybrid catalyst, substantially contributed to its extreme performance for the para-xylene one-pass precise synthesis from syngas. The concerted combination of two components in this hybrid catalyst can effectively depress the formation of unwanted by-products and facilitate the oriented synthesis of para-xylene from syngas with unprecedented efficiency at the same time.
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