Dealumination kinetics of composite ZSM-5/mordenite zeolite during steam treatment: An in-situ DRIFTS study

Xiaoxiao Zhang; Dangguo Cheng; Fengqiu Chen; Xiaoli Zhan

doi:10.1016/j.cjche.2017.11.009

Your Location：

Home >

Browse articles >

Dealumination kinetics of composite ZSM-5/mordenite zeolite during steam treatment: An in-situ DRIFTS study

Catalysis, Kinetics and Reaction Engineering | Updated：2026-01-06

- Dealumination kinetics of composite ZSM-5/mordenite zeolite during steam treatment: An in-situ DRIFTS study
- Dealumination kinetics of composite ZSM-5/mordenite zeolite during steam treatment: An in-situ DRIFTS study
- 中国化学工程学报（英文版） 2018年26卷第3期页码：545-550
- Affiliations：
  
  Zhejiang Provincial Key Laboratory of Advanced Chemical Engineering Manufacture Technology, College of Chemical and Biological Engineering, Zhejiang University,Hangzhou,China,310027
- Author bio：
- Funds：
- DOI：10.1016/j.cjche.2017.11.009
  中图分类号：
- 纸质出版：2018
- Accepted：
Scan QR Code
Xiaoxiao Zhang, Dangguo Cheng, Fengqiu Chen, 等. Dealumination kinetics of composite ZSM-5/mordenite zeolite during steam treatment: An in-situ DRIFTS study[J]. 中国化学工程学报（英文版）, 2018,26(3):545-550.

DRIFTS study[J]. Chinese Journal of Chemical Engineering, 2018, 26(3): 545-550.
Xiaoxiao Zhang, Dangguo Cheng, Fengqiu Chen, 等. Dealumination kinetics of composite ZSM-5/mordenite zeolite during steam treatment: An in-situ DRIFTS study[J]. 中国化学工程学报（英文版）, 2018,26(3):545-550. DOI： 10.1016/j.cjche.2017.11.009.

DRIFTS study[J]. Chinese Journal of Chemical Engineering, 2018, 26(3): 545-550. DOI： 10.1016/j.cjche.2017.11.009.

摘要

Abstract

To get a better understanding of structural deactivation of ZSM-5/MOR during the catalytic cracking of n-heptane in the steam atmosphere

a comprehensive mechanism of hydrothermal dealumination was proposed through in-situ diffuse reflectance Fourier transform infrared spectroscopy (DRIFTS) in this work. The mechanism can be divided into two steps:firstly

the hydrolysis of four Al-O bonds

and secondly

the self-healing of Si-OH bonds accompanied with partial condensation of the extra-framework Al species. Accordingly

the kinetics of dealumination process has also been fully discussed. In the IR spectra

the range of 3450-3850 cm

-1

could be deconvolved to distinguish the hydroxyl groups on the different position and calculate the consumption of each hydroxyl group during the reaction. Based on results from the in-situ DRIFTS

the kinetics of dealumination was hence developed and also in well agreement with the kinetics of deactivation of ZSM/MOR catalysts during the reaction in the presence of little coke deposits.

关键词

Keywords

references

浏览量

115

Downloads

CSCD

文章被引用时，请邮件提醒。

Submit

工具集

关联资源

Hydrothermal synthesis of zeolitic material from circulating fluidized bed combustion fly ash for the highly efficient removal of lead from aqueous solution

Ethylbenzene disproportionation and p-xylene selectivity enhancement in xylene isomerization using high crystallinity desilicated H-ZSM-5

COS generation behavior during desulfurization for H2S over zeolite in simulated blast furnace gas

Synthesis of ZSM-5 zeolite from desiliconization solution of coal fly ash and adsorption properties of Pb2+ containing wastewater

Mechanism insights into radical driven antibiotic degradation and green H2O2 production of Al2O3/g-C3N5 piezocatalyst