5931-91-9Relevant articles and documents
Dehydrogenation and Isomerization of Butane over Cr Catalysts Supported on H-SSZ-35 Type Zeolites
Inaba, Megumu,Murata, Kazuhisa,Saito, Masahiro,Takahara, Isao,Mimura, Naoki,Hamada, Hideaki,Kurata, Yohei
, p. 381 - 386 (2007/10/03)
The dehydrogenation and isomerization of butane to isobutene over Cr catalysts supported on zeolites were investigated. Although a zeolite support, especially with a low Si/Al2 ratio, favors the cracking of butane over its dehydrogenation and isomerization, due to strong solid acidity, the loading of Cr on a zeolite support enhances the dehydrogenation and isomerization of butane. H-SSZ-35 type zeolite, which has a one-dimensional cage-type channel structure, was hydrothermally synthesized using cis,cis,cis-N-methylhexahydrojulolidinium hydroxide as a structure-directing agent (SDA). We found that Cr/H-SSZ-35 (Si/Al2 = 500) showed moderate butane conversion and isobutene selectivity. As a result, the yield of isobutene (conversion of butane x selectivity of isobutene) was the highest among the catalysts used in this study. Its activity at 500 °C remained unchanged for 6 h. Our evidence suggests that butane was dehydrogenated over the zeolite support or Cr2O3 particles, and a proportion of the dehydrogenated products were isomerized to isobutene over the zeolite support.