期刊
APPLIED CATALYSIS A-GENERAL
卷 404, 期 1-2, 页码 113-119出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.apcata.2011.07.020
关键词
1-Butene metathesis; Mordenite-alumina; Acid leaching; Aluminum molybdate
资金
- National Natural Science Foundation of China [20773120, 20903088]
Molybdenum oxide supported on mordenite zeolite-alumina composite is post-treated by nitric acid leaching with varying periods (12-48h). The post-treated molybdenum catalysts display much higher stability for propene formation in 1-butene metathesis reaction. The evolution of Mo species has been characterized by laser Raman, (27)AI MAS NMR and X-ray photoelectron spectroscopy. Characterization results have shown the extraction of aluminum molybdates (Al-2(MoO4)(3)) after acid leaching post-treatment. This structural transformation relates to a transition in coke species on the spent molybdenum catalysts, and leads to the improvement in metathesis stability. (C) 2011 Elsevier B.V.. All rights reserved.
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