Dehydrogenation and Isomerization of Butane over Cr Catalysts Supported on H-SSZ-35 Type Zeolites
Dehydrogenation and Isomerization of Butane over Cr Catalysts Supported on H-SSZ-35 Type Zeolites
复制标题
H-SSZ-35 型沸石负载 Cr 催化剂上丁烷脱氢和异构化
DOI：
10.1246/bcsj.77.381
复制
发表时间：
2004
影响因子：
4
通讯作者：
Y. Kurata
中科院分区：
文献类型：
--
作者：
M. Inaba;K. Murata;M. Saito;I. Takahara;N. Mimura;H. Hamada;Y. Kurata
研究了分子筛负载Cr催化剂上丁烷脱氢和异构化制异丁烯的反应。虽然沸石载体，特别是低Si/Al 2比的沸石载体，有利于丁烷的裂解而不是脱氢和异构化，但由于强的固体酸性，Cr在沸石载体上的负载促进了丁烷的脱氢和异构化。以cis，cis，cis-N-甲基六氢久洛尼碱氢氧化物为结构导向剂（SDA），水热法合成了具有一维笼型孔道结构的H-SSZ-35型分子筛。结果表明，Cr/H-SSZ-35（Si/Al 2 = 500）具有中等的丁烷转化率和异丁烯选择性。结果表明，在本研究所用的催化剂中，异丁烯的产率（丁烷转化率×异丁烯选择性）最高。在500°C下，其活性保持不变6小时。我们的证据表明，丁烷在沸石载体或Cr2 O3颗粒上脱氢，并且一部分脱氢产物在沸石载体上异构化为异丁烯。
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/Al 2 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 structure0direction agret (SDA) We found that Cr/H-SSZ-35 (Si/Al 2 = 500) showed moderate butane conversion and isobutcne selectivity. As a result, the yield of isobutene (conversion of butane x selectivity of isobutene) was the highest among the cat6alysts 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 Cr 2 O 3 particles, and a proportion of the dehydrogenated products were isomerized to isobatene over the zeolite support.