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Explaining the influence of the introduced base sites into alkali oxide modified CsX towards side-chain alkylation of toluene with methanol

文献类型：期刊论文

作者Guo, Hongchen1; Li, Peidong1,2,3; Han, Qiao1,2,3; Zhang, Xiaomin2; Yuan, Yangyang2; Zhang, Yanfei1,2,3; Xu, Li2; Xu, Lei2
刊名RSC ADVANCES
出版日期2019
卷号9期号:23页码:13234-13242
ISSN号2046-2069
DOI10.1039/c9ra01798d
通讯作者Guo, Hongchen(hongchenguo@dlut.edu.cn) ; Xu, Lei(leixu@dicp.ac.cn)
英文摘要The effect of the introduced base sites in CsX with alkali oxide modification towards side-chain alkylation of toluene with methanol was systematically investigated in the present work. A series of alkali oxide modified CsX with a base properties (base strength and amount) gradient were prepared by impregnating CsX with alkali metal hydroxide. Here, CsX with different base strengths were selected as the parent zeolite, which is favorable to clarify the different types of base site in the modified CsX. The base properties of the samples were elucidated based on the CO2-TPD results as well as with characterization by XPS and FT-IR of adsorbed CO2. It was revealed that the base strength of the oxygen atoms with negative charge (O-) in the zeolite framework can be strengthened by the electron donating function of the alkali oxides in the supercage of CsX. Detailed analysis of the correlation between the reaction behaviors of side-chain alkylation reaction and the base properties of the indicated catalysts was carried out. It was found that the dehydrogenation of methanol to formaldehyde step was promoted by the increasing base properties of O- in the CsX framework and that was the main reason for the promotion of the whole side-chain alkylation reaction. However, it was also found that the stronger base properties of the alkali oxide modified CsX would enhance the formation of active hydrogen atoms, which aggravated the unwanted styrene conversion to ethylbenzene.
WOS关键词ZEOLITE-X ; FAUJASITE ZEOLITES ; CESIUM ; ADSORPTION ; CATALYSTS ; FRAMEWORK ; ELECTRONEGATIVITY ; EXCHANGE ; BASICITY ; ISOMERIZATION
资助项目National Natural Science Foundation of China[21576252]
WOS研究方向Chemistry
语种英语
WOS记录号WOS:000468636000052
出版者ROYAL SOC CHEMISTRY
资助机构National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China
源URL[http://cas-ir.dicp.ac.cn/handle/321008/171895]  
专题大连化学物理研究所_中国科学院大连化学物理研究所
通讯作者Guo, Hongchen; Xu, Lei
作者单位1.Dalian Univ Technol, Sch Chem Engn, State Key Lab Fine Chem, Dalian 116024, Peoples R China
2.Chinese Acad Sci, Dalian Inst Chem Phys, Natl Lab Clean Energy, Dalian 116023, Peoples R China
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式
GB/T 7714		 Guo, Hongchen,Li, Peidong,Han, Qiao,et al. Explaining the influence of the introduced base sites into alkali oxide modified CsX towards side-chain alkylation of toluene with methanol[J]. RSC ADVANCES,2019,9(23):13234-13242.
APA Guo, Hongchen.,Li, Peidong.,Han, Qiao.,Zhang, Xiaomin.,Yuan, Yangyang.,...&Xu, Lei.(2019).Explaining the influence of the introduced base sites into alkali oxide modified CsX towards side-chain alkylation of toluene with methanol.RSC ADVANCES,9(23),13234-13242.
MLA Guo, Hongchen,et al."Explaining the influence of the introduced base sites into alkali oxide modified CsX towards side-chain alkylation of toluene with methanol".RSC ADVANCES 9.23(2019):13234-13242.

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来源：大连化学物理研究所

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