文献类型：期刊文献

英文题名：Hierarchically macro-/mesoporous structured Co-Mo-Ni/γ-Al2O3 catalyst for the hydrodesulfurization of thiophene

作者：Huang, Yongli[1]; Zhou, Zhiming[1]; Qi, Yang[1]; Li, Xun[2]; Cheng, Zhenmin[1]; Yuan, Weikang[1]

机构：[1] State Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China; [2] School of Chemistry and Biological Engineering, Changsha University of Science and Technology, Changsha 410077, China

年份：2011

卷号：172

期号：1

起止页码：444

外文期刊名：Chemical Engineering Journal

收录：EI(收录号：20134016798173)

语种：英文

外文关键词：Scanning electron microscopy - X ray diffraction - Hydrodesulfurization - Catalyst supports - Fourier transform infrared spectroscopy - Porosity - Catalyst activity - Activation energy - Thiophene

摘要：A novel Co-Mo-Ni/γ-Al2O3 catalyst with a hierarchically macro-/mesoporous structure was prepared for the hydrodesulfurization of thiophene. The catalyst support and catalyst were characterized by N2 adsorption-desorption, scanning electron microscope (SEM), X-ray diffraction (XRD), Fourier-transformed infrared spectroscopy (FTIR), and energy-dispersive spectrometry (EDS) techniques. The hierarchically porous structure of the novel catalyst, i.e., the parallel arrays of macroporous channels and the accessible mesopores present in the walls that separated the macrochannels, was well preserved after high-pressure pelletization. Compared with a commercial Co-Mo-Ni/γ-Al2O3 catalyst, which had similar physicochemical properties with the novel catalyst except for the absence of macropores, the novel catalyst exhibited much higher hydrodesulfurization activity in the apparent kinetic region though similar activities were observed for the two catalysts in the intrinsic kinetic region. This result revealed the significant effect of the hierarchically macro-/mesoporous structure. Based on the experimental data, intrinsic and apparent activation energies of thiophene hydrodesulfurization for the novel catalyst were 65.8 and 50.8kJ/mol, respectively, while the corresponding values for the commercial catalyst were 69.9 and 35.0kJ/mol, respectively. The much lower apparent activation energy for the commercial catalyst further evidenced the diffusion-enhanced effect of the hierarchically porous structure of the novel Co-Mo-Ni/γ-Al2O3 catalyst. ? 2011 Elsevier B.V.