期刊
CATALYSIS COMMUNICATIONS
卷 8, 期 3, 页码 625-628出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.catcom.2006.08.019
关键词
gamma-Bi2MoO6; effect of pH; n-butene; 1,3-butadiene; oxidative dehydrogenation; oxygen mobility; temperature-programmed reoxidation (TPRO)
gamma-Bi-2-MoO6 catalysts were prepared by a co-precipitation method with a variation of pH value (pH 1-7), and they were applied to the oxidative dehydrogenation of n-butene to 1,3-butadiene in a continuous flow fixed-bed reactor. Temperature-programmed reoxidation (TPRO) measurements were carried out to determine the oxygen mobility to make up lattice oxygen of gamma-Bi2MoO6 consumed in the reaction. It was observed that the catalytic performance of gamma-Bi2MoO6 was closely related to the oxygen mobility of gamma-Bi2MoO6. The yield for 1.3-butadiene was monotonically increased with decreasing TPRO peak temperature and with increasing TPRO peak area. Among the catalysts tested, the gamma-Bi2MoO6 catalyst prepared at pH 3 showed the best catalytic performance due to its facile oxygen mobility. (c) 2006 Elsevier B.V. All rights reserved.
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