Synthesis and Catalytic Performance of a Dual-Sites Fe-Zn Catalyst Based on Ordered Mesoporous Al2O3 for Isobutane Dehydrogenation
Synthesis and Catalytic Performance of a Dual-Sites Fe-Zn Catalyst Based on Ordered Mesoporous Al2O3 for Isobutane Dehydrogenation
复制标题
基于有序介孔Al2O3的双位铁锌异丁烷脱氢催化剂的合成及催化性能
DOI：
10.1007/s10562-019-02686-x
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发表时间：
2019
影响因子：
2.8
通讯作者：
Chou Lingjun
中科院分区：
文献类型：
--
作者：
Cheng Ming;Zhao Huahua;Yang Jian;Zhao Jun;Yan Liang;Song Huanling;Chou Lingjun
摘要 通过一锅蒸发诱导自组装（EISA）方法结合初湿策略，可以轻松制备有序介孔 Zn/OMA-Fe 材料。对这些材料进行异丁烷脱氢为异丁烯，在 13Zn/OMA-10Fe 催化剂上，在 580 °C、300 h−1GHSV 条件下，异丁烷转化率为 50.7%，收率 37.8%。合成的材料具有大比表面积和均匀的孔径，并通过 XRD、N2 吸附-脱附、TEM、XPS、H2-TPR、Mіssbauer 和 NH3-TPD 进行了表征。一部分Fe物种高度分散在载体表面，其他物种融入Al2O3骨架中，Zn物种以六方ZnO相的形式存在。这些催化剂的总酸度通过引入锌而增加，促进异丁烷的转化。此外，Fe物质的转化可能在提高异丁烯选择性方面发挥重要作用。图形摘要
AbstractOrdered mesoporous Zn/OMA-Fe materials were easily prepared via one pot evaporation induced self-assembly (EISA) method in combination with incipient wetness strategy. Dehydrogenation of isobutane to isobutene were carried out on these materials, the isobutane conversion of 50.7% and the yield of 37.8% were obtained over 13Zn/OMA-10Fe catalyst at 580 °C with 300 h−1GHSV. The synthesized materials with large specific surface areas and uniform pore sizes were characterized by XRD, N2adsorption–desorption, TEM, XPS, H2-TPR, Mӧssbauer and NH3-TPD. A portion of Fe species were highly dispersed on the support surface and others incorporated into Al2O3frameworks, Zn species existed in the form of hexagonal ZnO phase. The total acidity of these catalysts was increased by the introduction of Zn, facilitating the conversion of isobutane. Moreover, the conversion of Fe species might play a major role in improving isobutene selectivity.Graphical Abstract