Simultaneous dehydrogenation and isomerization of n-butane to isobutene over Cr/WO_{3}–ZrO_{2} catalysts

Authors: Wang S.; Murata K.; Hayakawa T.; Hamakawa S.; Suzuki K.

Source: Catalysis Letters, Volume 66, Numbers 1-2, 2000 , pp. 13-17(5)

Publisher: Springer

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Abstract:

A series of WO_{3}-promoted Cr_{2}O_{3}-based catalysts were prepared and tested for the simultaneous dehydrogenation and isomerization of n-butane to isobutene. It is found that a Cr_{2}O_{3}/WO_{3}–ZrO_{2} system is an effective catalyst for this reaction; however, the catalytic behavior is dependent on Cr_{2}O_{3} and WO_{3} contents, space velocity and temperature. 10 wt% Cr_{2}O_{3}/20 wt% WO_{3}–ZrO_{2} can give high initial conversion and isobutene selectivity, but it deactivates rapidly due to the variation of surface properties and pore structure caused by carbon deposition.

Keywords: butane; dehydroisomerization; isobutene; CrO/WO–ZrO catalysts

Language: English

Document Type: Regular paper

Affiliations: 1: Department of Surface Chemistry, National Institute of Materials and Chemical Research, Tsukuba, Ibaraki 305, Japan E-mail: shaobin@eng.auburn.edu

Publication date: 2000-01-01