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题名: Effects of surface acidities of MCM-41 modified with MoO3 on adsorptive desulfurization of gasoline
作者: Shao, XC; Zhang, XT; Yu, WG; Wu, YY; Qin, YC; Sun, ZL; Song, LJ
收录类别: SCIE ; EI
出版日期: 2012-12-15
刊名: APPLIED SURFACE SCIENCE
卷号: 263
出版者: ELSEVIER
出版地: AMSTERDAM
英文摘要: A series of MCM-41 samples containing molybdenum oxide as active species in the mesoporous channels loaded by spontaneous monolayer dispersion (SMD) and impregnation (IM) have been prepared and characterized using XRD, N-2 adsorption-desorption analysis, Fourier transform infrared spectroscopy (FTIR) and intelligent gravimetric analyzer (IGA). The relative number of hydroxy on the adsorbents was investigated by in situ FTIR. Surface acidities of the adsorbents were studied by infrared spectroscopy of adsorbed pyridine and correlated with reactivity for adsorptive desulfurization. The IGA technique was employed to investigate adsorption behavior of thiophene and benzene on the adsorbents at 303 K. It is shown that MoO3 can be highly dispersed up to 0.2 g g(-1) in the MCM-41 channels by the SMD strategy with the ordered mesoporous structure of the MoMM samples remaining intact. The ordered mesostructure of MCM-41 is, however, destroyed at higher MoO3 contents of 0.26 and 0.32 g g(-1) with particle sizes of 1.2 nm and 3.6 nm, respectively, observed. For the MoMI(0.2) sample prepared by the IM method, the aggregation of the MoO3 particles takes place with a particle size of 6.5 nm obtained. The results are also revealed that the dispersion extent of the MoO3 species is related to the abundant surface hydroxy of MCM-41. The host species and guest species undergo solid-state reaction to form Si-O-Mo bonds in the mixtures which enhance both the Lewis acid and Bronsted acid of the samples. It has been concluded that the surface acidities of the sorbents contributes to the desulfurization performance which has also been investigated in this study. The octahedral coordinated species (Mo7O246-) are the adsorptive active species for desulfurization compared with the tetrahedral coordinated ones (MoO42-). (C) 2012 Published by Elsevier B.V.
关键词: MoO3 ; MCM-41 ; Adsorptive desulfurization ; Spontaneous monolayer dispersion in situ ; FTIR ; Pyridine
作者部门: [Shao, Xinchao ; Zhang, Xiaotong ; Yu, Wenguang ; Wu, Yuye ; Qin, Yucai ; Sun, Zhaolin ; Song, Lijuan] Liaoning ShiHua Univ, Key Lab Petrochem Catalyt Sci & Technol, Fushun 113001, Peoples R China ; [Qin, Yucai ; Song, Lijuan] China Univ Petr E China, Coll Chem & Chem Engn, Qingdao 257061, Shandong, Peoples R China ; [Sun, Zhaolin] Lanzhou Univ, Sch Chem & Chem Engn, Lanzhou 730000, Peoples R China
通讯作者: Song, LJ (reprint author), ShiHua Univ, Key Lab Petrochem Catalyt Sci & Technol, Fushun 113001, Peoples R China.
学科分类: Chemistry;Materials Science;Physics
文章类型: Article
所属项目编号: National Natural Science Foundation of China [20976077, 21076100] ; Ministry of Science and Technology of the People's Republic of China under the National Basic Research Program of China (973 Program) [2007CB216403] ; Innovation Team of Liaoning Province Colleges
所属项目名称: 国家自然科学基金项目 ; 国家重点基础研究发展计划以及国家重大科学研究计划(973计划)
项目资助者: NSFC ; MOST
语种: 英语
DOI: 10.1016/j.apsusc.2012.07.142
ISSN号: 0169-4332
WOS记录号: WOS:000311217500001
EI记录号: 20124815712365
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内容类型: 期刊论文
URI标识: http://ir.lzu.edu.cn/handle/262010/75245
Appears in Collections:化学化工学院_期刊论文

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Recommended Citation:
Shao, XC; Zhang, XT; Yu, WG; Wu, YY; Qin, YC; Sun, ZL; Song, LJ.Effects of surface acidities of MCM-41 modified with MoO3 on adsorptive desulfurization of gasoline,APPLIED SURFACE SCIENCE,2012,263():
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