Acidic Properties of Various Silica Catalysts Doped with Chromium for the Oxidative Dehydrogenation of Isobutane to Isobutene
Acidic Properties of Various Silica Catalysts Doped with Chromium for the Oxidative Dehydrogenation of Isobutane to Isobutene
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DOI：
10.1252/jcej.14we112
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发表时间：
2015-02
影响因子：
0.8
通讯作者：
S. Sugiyama;T. Ehiro;Y. Nitta;Ai Itagaki;Keizo Nakagawa;M. Katoh;Yuuki Katou;Shuji Akihara;T. Yasukawa;W. Ninomiya
中科院分区：
文献类型：
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作者：
S. Sugiyama;T. Ehiro;Y. Nitta;Ai Itagaki;Keizo Nakagawa;M. Katoh;Yuuki Katou;Shuji Akihara;T. Yasukawa;W. Ninomiya
尽管先前的研究人员已经发现掺杂有铬的FSM-16（#16折叠片介孔材料）和相关的掺杂Cr的二氧化硅催化剂对于异丁烷氧化脱氢为异丁烯显示出很大的活性，但是关于这些催化剂的性质的信息是不足的。在本研究中，三种类型的铬掺杂的二氧化硅催化剂制备通过应用模板离子交换法。CrOx/FSM-16和CrOx/SiO2用作参考。将这些催化剂用于氧化脱氢，然后通过各种技术对其进行表征。活性最高的催化剂是Cr掺杂的二氧化硅，其不具有介孔FSM-16所特有的六方结构。各种表征表明，Cr物质的催化活性源自弱酸性和氧化还原性，其源自硅酸盐和Cr阳离子的组合，而不是FSM-16的六方结构和强酸性。
Although previous researchers have found that FSM-16 (#16 Folded Sheet Mesoporous material) doped with chromium and related Cr-doped silica catalysts has shown great activity for the oxidative dehydrogenation of isobutane to isobutene, information on the nature of these catalysts is insufficient. For this study, three types of Cr-doped silica catalysts were prepared by applying the template ion exchange method. CrOx/FSM-16 and CrOx/SiO2 were used as references. These catalysts were used for oxidative dehydrogenation, which was then characterized via various techniques. The most active catalyst was Cr-doped silica, which did not have the hexagonal structure that is characteristic of mesoporous FSM-16. Various characterizations showed that the catalytic activity of the Cr-species, stemmed from a weak acidic nature and a redox nature that originated from the combination of silicate and a Cr cation, as opposed to the hexagonal structure and strong acidic nature of FSM-16.