The catalytic dehydrogenation of isobutane and the stability enhancement over Fe incorporated SBA-15
The catalytic dehydrogenation of isobutane and the stability enhancement over Fe incorporated SBA-15
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异丁烷的催化脱氢以及掺铁 SBA-15 的稳定性增强
DOI：
10.1016/j.micromeso.2018.02.046
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发表时间：
2018-08
影响因子：
5.2
通讯作者：
Lingjun Chou
中科院分区：
文献类型：
--
作者：
Ming Cheng;Huahua Zhao;Jian Yang;Jun Zhao;Liang Yan;Huanling Song;Lingjun Chou
以尿素为ph自调节剂，采用水热法制备了fe - SBA-15催化剂，所制得的催化剂具有高度有序的介孔结构，并对其异丁烷脱氢活性进行了XRD和TEM表征。活性位点为中酸性和强酸性位点以及Fe3+。有序介孔铁-二氧化硅催化剂比无定形铁-二氧化硅催化剂表现出更好的催化稳定性，这归因于有序介孔结构的约束效应。此外，框架铁改善了铁与载体的相互作用，增加了更多的弱酸性位点，有利于抑制焦炭的形成。焦炭是催化失活的主要原因。
Fe-incorporated SBA-15 catalysts were prepared via hydrothermal method using urea as self-regulator for pH. The obtained catalysts expressed highly ordered mesoporous structures proved by N2adsorption-desorption, XRD and TEM characterization, also were tested for their activity in dehydrogenation of isobutane. Moderately and strongly acidic sites as well as Fe3+species were identified as active sites. The ordered mesoporous iron-silica catalyst displayed better catalytic stability as compared with amorphous iron-silica catalyst, which was ascribed to the confinement effect of ordered meso-structure. Moreover, framework iron improved the interaction of iron with the support and increased more weakly acidic sites, which were favorable to restrain the coke formation. The coke was a major cause for catalytic deactivation.
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影响因子：
5.2
作者：
Xueguang Wang;Y. Tseng;J. Chan;S. Cheng
通讯作者：
Xueguang Wang;Y. Tseng;J. Chan;S. Cheng
影响因子：
5.3
作者：
D. Seddon
通讯作者：
D. Seddon
影响因子：
5.5
作者：
H. Shimada;T. Akazawa;N. Ikenaga;Toshimitsu Suzuki
通讯作者：
H. Shimada;T. Akazawa;N. Ikenaga;Toshimitsu Suzuki
影响因子：
--
作者：
Yu Zhou;Jing Yang;Jia Yuan Yang;Fangna Gu;Ying Wang;J. Zhu
通讯作者：
Yu Zhou;Jing Yang;Jia Yuan Yang;Fangna Gu;Ying Wang;J. Zhu
影响因子：
6.7
作者：
Yamashita, Toru;Hayes, Peter
通讯作者：
Hayes, Peter