Elucidating the effect of oxides on the zeolite catalyzed alkylation of benzene with 1-dodecene

doi:10.1016/j.cjche.2022.07.010

中国化学工程学报 ›› 2023, Vol. 56 ›› Issue (4): 126-135.DOI: 10.1016/j.cjche.2022.07.010

• Full Length Article • 上一篇下一篇

Elucidating the effect of oxides on the zeolite catalyzed alkylation of benzene with 1-dodecene

Shiyong Xing¹, Yan Cui², Tiefeng Wang¹, Jinwei He³, Minghan Han¹

1. Beijing Key Laboratory of Green Chemical Reaction Engineering and Technology, Department of Chemical Engineering, Tsinghua University, Beijing 100084, China;
2. Petrochemical Research Institute, PetroChina Company Limited, Beijing 100195, China;
3. Henan Energy and Chemical Industry Group Company Limited, Zhengzhou 450046, China

收稿日期:2022-06-02 修回日期:2022-06-26 出版日期:2023-04-28 发布日期:2023-06-13
通讯作者: Minghan Han,E-mail:hanmh@mail.tsinghua.edu.cn
基金资助:
The Beijing PARATERA Tech Corp., Ltd. should be acknowledged for the computational resources.

Elucidating the effect of oxides on the zeolite catalyzed alkylation of benzene with 1-dodecene

Shiyong Xing¹, Yan Cui², Tiefeng Wang¹, Jinwei He³, Minghan Han¹

1. Beijing Key Laboratory of Green Chemical Reaction Engineering and Technology, Department of Chemical Engineering, Tsinghua University, Beijing 100084, China;
2. Petrochemical Research Institute, PetroChina Company Limited, Beijing 100195, China;
3. Henan Energy and Chemical Industry Group Company Limited, Zhengzhou 450046, China

Received:2022-06-02 Revised:2022-06-26 Online:2023-04-28 Published:2023-06-13
Contact: Minghan Han,E-mail:hanmh@mail.tsinghua.edu.cn
Supported by:
The Beijing PARATERA Tech Corp., Ltd. should be acknowledged for the computational resources.

摘要/Abstract

摘要： In the present work, the effect of oxides on the alkylation of benzene with 1-dodecene was comprehensively investigated over MCM-49 n-heptanol, n-heptaldehyde and n-heptanoic acid were selected as the model oxides herein, and obvious decrease of lifetime could be caused by only trace amount of oxides added in the feedstocks. However, the deactivated catalysts were difficult to be regenerated by extraction with hot benzene. Additionally, coke-burning was also proved to be incapable to regenerate the deactivated catalysts mainly for the dealumination during calcination. Further characterizations complementary with DFT calculations were conducted to demonstrate that the deactivation was mainly due to the firm adsorption of oxides on the acid sites.

关键词: Zeolite, 1-dodecene, Alkylation, Oxides, Deactivation

Abstract: In the present work, the effect of oxides on the alkylation of benzene with 1-dodecene was comprehensively investigated over MCM-49 n-heptanol, n-heptaldehyde and n-heptanoic acid were selected as the model oxides herein, and obvious decrease of lifetime could be caused by only trace amount of oxides added in the feedstocks. However, the deactivated catalysts were difficult to be regenerated by extraction with hot benzene. Additionally, coke-burning was also proved to be incapable to regenerate the deactivated catalysts mainly for the dealumination during calcination. Further characterizations complementary with DFT calculations were conducted to demonstrate that the deactivation was mainly due to the firm adsorption of oxides on the acid sites.

Key words: Zeolite, 1-dodecene, Alkylation, Oxides, Deactivation

Shiyong Xing, Yan Cui, Tiefeng Wang, Jinwei He, Minghan Han. Elucidating the effect of oxides on the zeolite catalyzed alkylation of benzene with 1-dodecene[J]. 中国化学工程学报, 2023, 56(4): 126-135.

Shiyong Xing, Yan Cui, Tiefeng Wang, Jinwei He, Minghan Han. Elucidating the effect of oxides on the zeolite catalyzed alkylation of benzene with 1-dodecene[J]. Chinese Journal of Chemical Engineering, 2023, 56(4): 126-135.

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Elucidating the effect of oxides on the zeolite catalyzed alkylation of benzene with 1-dodecene

Elucidating the effect of oxides on the zeolite catalyzed alkylation of benzene with 1-dodecene

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