The Pore Confinement Effect of FDU-12 Mesochannels on MoS2 Active Phases and Their Hydrodesulfurization Performance
The Pore Confinement Effect of FDU-12 Mesochannels on MoS2 Active Phases and Their Hydrodesulfurization Performance
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FDU-12介孔道对MoS2活性相的孔限域效应及其加氢脱硫性能
DOI：
10.1155/2016/5208027
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发表时间：
2016-01-01
影响因子：
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通讯作者：
Cui, Chunsheng
中科院分区：
文献类型：
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作者：
Liu, Cong;Yuan, Pei;Cui, Chunsheng
以具有高度有序的面心立方介孔结构的FDU-12为载体，制备了Mo/FDU-12催化剂，用于二苯并噻吩（DBT）加氢脱硫反应。采用等体积浸渍法制备了一系列MoO 3负载量分别为6、8、10、12和15 wt.%的Mo/FDU-12催化剂。本工作的目的是探索孔限制效果FDU-12介孔通道上的二硫化钼形态与各种金属负载。发现当MoO 3负载量从6增加到15 wt.%时，由于FDU-12载体笼状孔道的限制，MoS 2纳米晶由单层向多层转变，形貌由平直层状向弯曲状、环状、球状转变。HDS结果表明，MoO 3负载量为10 wt.%时，催化剂的活性先升高后降低，HDS性能最好。此外，还比较了以FDU-12为载体的Mo催化剂与以商品γ-Al 2 O3和SBA-15为载体的Mo催化剂的HDS活性，结果表明，FDU-12具有上级的大孔径和有序的三维开孔孔道结构，其催化剂的HDS活性优于其他两种载体。
FDU-12 silica with highly ordered face-centered cubic mesoporous structure is developed as support to prepare Mo/FDU-12 catalysts for hydrodesulfurization HDS of dibenzothiophene DBT. A series of Mo/FDU-12 catalysts are synthesized by using incipient wetness impregnation method with different MoO3 loadings 6, 8, 10, 12, and 15 wt.%. The objective of this work is to explore the pore confinement effect of FDU-12 mesochannels on the MoS2 morphology with various metal loadings. It is found that, as increasing MoO3 loadings from 6 to 15 wt.%, the MoS2 nanocrystallites transform from monolayer to multilayer and the morphology changes from straight layered to curved and then to ring-like and finally to spherical-like morphology due to the restriction of cage-like pore channels of FDU-12 support. The HDS results show that the catalytic activity increases first and then decreases with the best HDS performance at the MoO3 loading of 10 wt.%. In addition, we compared the HDS activity of Mo catalyst supported on FDU-12 with that on the commercial γ-Al2O3 and SBA-15; the result exhibits that FDU-12 is superior to the other two supports due to its large pore size and ordered three-dimensional open pore channels.