期刊
JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL
卷 264, 期 1-2, 页码 237-240出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.molcata.2006.09.030
关键词
beta-Bi2Mo2O9; n-butene; 1,3-butadiene; oxidative dehydrogenation; thermal stability; oxygen mobility; synergy effect
资金
- Korea Institute of Industrial Technology(KITECH) [2005-E-ID11-P-02-0-000, 2005-E-ID11-P-02] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
A beta-Bi2Mo2O9 catalyst was prepared by a co-precipitation method and applied to the oxidative dehydrogenation of n-butene to 1,3-butadine. It was found that the beta-Bi2Mo2O9 catalyst retained lower oxygen mobility than gamma-Bi2MoO6. It was also revealed that the beta-Bi2MoO9 was thermally unstable and decomposed into alpha-Bi2Mo3O12 and gamma-Bi2MoO6 at a reaction temperature of 420 degrees C. However, the beta-Bi2Mo2O9 showed a higher catalytic performance than the alpha-Bi2Mo3O12 and gamma-Bi2MoO6 catalysts in the oxidative dehydrogenation of n-butene, in spite of its thermal instability and low oxygen mobility. Moreover, the beta-Bi2Mo2O9 showed a stable catalytic performance with time on stream without catalyst deactivation. The high and stable catalytic performance of beta-Bi2Mo2O9 can be attributed to the synergy effect of alpha-Bi2Mo3O12 and gamma-Bi2MoO6 formed via the decomposition of beta-Bi2Mo2O9 during the catalytic reaction, to the high intrinsic catalytic activity of beta-Bi2Mo2O9, and to the well-crystallized parts of beta-Bi2Mo2O9. (c) 2006 Elsevier B.V. All rights reserved.
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