Deactivation mechanism of beta-zeolite catalyst for synthesis of cumene by benzene alkylation with isopropanol

Yefei Liu; Yang Zou; Hong Jiang; Huanxin Gao; Rizhi Chen

doi:10.1016/j.cjche.2016.11.001

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Deactivation mechanism of beta-zeolite catalyst for synthesis of cumene by benzene alkylation with isopropanol

Catalysis, kinetics and reaction engineering | Updated：2026-01-06

- Deactivation mechanism of beta-zeolite catalyst for synthesis of cumene by benzene alkylation with isopropanol
- Deactivation mechanism of beta-zeolite catalyst for synthesis of cumene by benzene alkylation with isopropanol
- 中国化学工程学报（英文版） 2017年25卷第9期页码：1195-1201
- Affiliations：
  
  1. State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing Tech University,Nanjing,China,210009
  2. SINOPEC Shanghai Research Institute of Petrochemical Technology,Shanghai,China,201208
- Author bio：
- Funds：
- DOI：10.1016/j.cjche.2016.11.001
  中图分类号：
- 纸质出版：2017
- Accepted：
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Yefei Liu, Yang Zou, Hong Jiang, 等. Deactivation mechanism of beta-zeolite catalyst for synthesis of cumene by benzene alkylation with isopropanol[J]. 中国化学工程学报（英文版）, 2017,25(9):1195-1201.

Yefei Liu, Yang Zou, Hong Jiang, Huanxin Gao, Rizhi Chen. Deactivation mechanism of beta-zeolite catalyst for synthesis of cumene by benzene alkylation with isopropanol[J]. , 2017, 25(9): 1195-1201.
Yefei Liu, Yang Zou, Hong Jiang, 等. Deactivation mechanism of beta-zeolite catalyst for synthesis of cumene by benzene alkylation with isopropanol[J]. 中国化学工程学报（英文版）, 2017,25(9):1195-1201. DOI： 10.1016/j.cjche.2016.11.001.

Yefei Liu, Yang Zou, Hong Jiang, Huanxin Gao, Rizhi Chen. Deactivation mechanism of beta-zeolite catalyst for synthesis of cumene by benzene alkylation with isopropanol[J]. , 2017, 25(9): 1195-1201. DOI： 10.1016/j.cjche.2016.11.001.

摘要

Abstract

The alkylation of benzene with isopropanol over beta-zeolite is a more cost-effective solution to cumene production. During the benzene alkylation cycles

the cumene selectivity slowly increased

while the benzene conversion presented the sharp decrease due to catalyst deactivation. The deactivation mechanism of betazeolite catalyst was investigated by characterizing the fresh and used catalysts. The XRD

SEM and TEM results show that the crystalline and particle size of the beta-zeolite catalyst almost remained stable during the alkylation cycles. The drop in catalytic activity and benzene conversion could be explained by the TG

BET

-TPD and GC-MS results. The organic matters mainly consisted of ethylbenzene

-xylene and 1-ethyl-3-(1-methyl) benzene produced in the benzene alkylation deposited in the catalyst

which strongly reduced the specific surface area of beta-zeolite catalyst. Moreover

during the reaction cycles

the amount of acidity also significantly decreased. As a result

the catalyst deactivation occurred. To maintain the catalytic performance

the catalyst regeneration was carried out by using ethanol rinse and calcinat

ion. The deactivated catalyst could be effectively regenerated by the calcination method and the good catalytic performance was obtained.

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