期刊
CATALYSIS TODAY
卷 371, 期 -, 页码 85-92出版社
ELSEVIER
DOI: 10.1016/j.cattod.2020.07.076
关键词
SAPO zeolites; Shape-selectivity; Bifunctional; Syngas; Reaction coupling
资金
- National Key Research and Development Program of Ministry of Science and Technology [2017YFB0602201]
- National Natural Science Foundation of China [91945301, 21972116, 21872112, 21673188, 21690082]
Recent studies show that bifunctional catalysts of metal oxides and zeolites can control hydrocarbon distribution in syngas conversion. SAPO zeolites' micropore window size primarily determines the distribution, while cage size and reaction conditions only affect it within a narrow range of chain length. Zeolite topology has a similar impact on hydrocarbon distribution in syngas conversion compared to methanol conversion.
Recent studies demonstrate that bifunctional catalysts composed of metal oxide and zeolite can effectively control the hydrocarbon distribution in syngas conversion. In this effort, a set of eight silicoaluminophosphate (SAPO) zeolites with different topology structures are synthesized and integrated with a binary ZnAlO oxide for syngas conversion. The effects of micropore window size and cage size of SAPO zeolites, and reaction conditions on the hydrocarbon distribution are preliminarily investigated. It was found that the hydrocarbon distribution is primarily determined by the window size of SAPO zeolites, and a volcano trend was observed between the chain length of hydrocarbon products and the window sizes. The cage size of zeolites and reaction conditions only modifies the hydrocarbon distribution in a narrow range of chain length. The effect of zeolite topology on the hydrocarbon distribution in syngas conversion is overall in line with that in methanol conversion. These findings provide an efficient strategy to increase the selectivity of an individual hydrocarbon product in syngas conversion, such as ethylene, propylene, butenes, iso-butane and C5-C11 iso-paraffins.
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