中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
首页 机构 成果 学者
  
  1. CAS IR Grid
  2. 大连化学物理研究所
  3. 中国科学院大连化学物理研究所
Hydrogen transfer versus olefins methylation: On the formation trend of propene in the methanol-to-hydrocarbons reaction over Beta zeolites

文献类型：期刊论文

作者Yuan, Yangyang1; Zhang, Jie1,2; Xu, Lanjian1,2; Zhang, Yanfei1,2; Huang, Zhihua1,2; Zhang, Xiaomin1; Zhang, Xinzhi1; Xu, Lei1
刊名JOURNAL OF CATALYSIS
出版日期2018-12-01
卷号368页码:248-260
关键词Methanol to hydrocarbons Beta Bronsted acid site density Hydrogen transfer Methylation Cracking
ISSN号0021-9517
DOI10.1016/j.jcat.2018.10.015
通讯作者Yuan, Yangyang(yuanyangyang@dicp.ac.cn) ; Xu, Lei(leixu@dicp.ac.cn)
英文摘要Beta zeolites with similar textural properties but variable Bronsted acid site (BAS) densities in the range of 25.5-203.8 mu mol g(-1) were fabricated and investigated as catalysts in the methanol-to-hydrocarbons reaction. The intrinsic influence of BAS amount, BAS density and methanol conversion on the reaction mechanism was investigated. Interestingly, methanol conversion depends on the BAS amount regardless of the BAS density. The increase of methanol concentration could modulate the product distribution by promoting the methanol -induced hydrogen transfer reaction and enhancing the olefins methylation as well as inhibiting the cracking of higher olefins. As the BAS density decreases from 203.8 to 56.6 mu mol g(-1), hydrogen transfer reaction is gradually restrained while the olefin interconversion is enhanced, leading to gradual replacement of aromatics-based cycle by the olefins-based cycle and thus increasing the propene selectivity. However, as BAS density further decreases from 56.6 mu mol g(-1), the propene selectivity declines because the methylation route in the olefins-based cycle is much more favoured than the cracking route. After detailed investigation of the deactivation behaviours of involved Beta zeolites, it has been found that the accumulation of long-chain alkanes and large polycyclic aromatics is responsible for the catalyst deactivation. These results provide further insights into the effect of BAS density on the reaction mechanism and product selectivity. (C) 2018 Elsevier Inc. All rights reserved.
WOS关键词REACTION-MECHANISM ; CATALYTIC PERFORMANCE ; SHAPE SELECTIVITY ; PROPYLENE PRODUCTION ; PRODUCT SELECTIVITY ; COKE FORMATION ; MTO REACTION ; CONVERSION ; H-ZSM-5 ; DEACTIVATION
资助项目National Natural Science Foundation of China[21576252] ; National Natural Science Foundation of China[21506202]
WOS研究方向Chemistry ; Engineering
语种英语
WOS记录号WOS:000452582500024
出版者ACADEMIC PRESS INC ELSEVIER SCIENCE
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/321008/166446]  
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Yuan, Yangyang; Xu, Lei
作者单位1.Chinese Acad Sci, Dalian Inst Chem Phys, Dalian Natl Lab Clean Energy, Dalian 116023, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式
GB/T 7714		 Yuan, Yangyang,Zhang, Jie,Xu, Lanjian,et al. Hydrogen transfer versus olefins methylation: On the formation trend of propene in the methanol-to-hydrocarbons reaction over Beta zeolites[J]. JOURNAL OF CATALYSIS,2018,368:248-260.
APA Yuan, Yangyang.,Zhang, Jie.,Xu, Lanjian.,Zhang, Yanfei.,Huang, Zhihua.,...&Xu, Lei.(2018).Hydrogen transfer versus olefins methylation: On the formation trend of propene in the methanol-to-hydrocarbons reaction over Beta zeolites.JOURNAL OF CATALYSIS,368,248-260.
MLA Yuan, Yangyang,et al."Hydrogen transfer versus olefins methylation: On the formation trend of propene in the methanol-to-hydrocarbons reaction over Beta zeolites".JOURNAL OF CATALYSIS 368(2018):248-260.

入库方式： OAI收割

来源：大连化学物理研究所

浏览0
下载0
收藏0
其他版本

除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。