Extrusion of honeycomb monoliths of ZSM-5: A systematic method for determining the plasticity of zeolite pastes and optimizing extrusion workability

Zhou Zihao; Liu Yingshu; Sun Ningqi; Li Ziyi

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Extrusion of honeycomb monoliths of ZSM-5: A systematic method for determining the plasticity of zeolite pastes and optimizing extrusion workability

Updated：2026-08-24

- Extrusion of honeycomb monoliths of ZSM-5: A systematic method for determining the plasticity of zeolite pastes and optimizing extrusion workability
- Chinese Journal of Chemical Engineering Vol. 94, Issue 6, Pages: 291-300(2026)
- Affiliations：
  
  School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, China
  Songshan Lake Materials Laboratory, Dongguan 523808, China
  Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
- Author bio：
  
  Corresponding authors. E-mail addresses: liuyingshu@sslab.org.cn(Y. Liu)
  ziyili@ustb.edu.cn(Z. Li)
- Funds：
- DOI：
  CLC：
- Received：01 September 2025，
  
  Revised：2025-12-26，
  
  Accepted：29 December 2025，
  
  Online First：13 February 2026，
  
  Published：2026-06
- Accepted：
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Zhou Zihao, Liu Yingshu, Sun Ningqi, et al. Extrusion of honeycomb monoliths of ZSM-5: A systematic method for determining the plasticity of zeolite pastes and optimizing extrusion workability[J]. Chinese Journal of Chemical Engineering, 2026, 94(6): 291-300.
DOI：

Zhou Zihao, Liu Yingshu, Sun Ningqi, et al. Extrusion of honeycomb monoliths of ZSM-5: A systematic method for determining the plasticity of zeolite pastes and optimizing extrusion workability[J]. Chinese Journal of Chemical Engineering, 2026, 94(6): 291-300. DOI：

摘要

Abstract

Honeycomb monoliths of zeolites (HMZs) exhibit low pressure drop and high mass transfer efficiency due to their designable through-channels and the uniform distribution of the active phase throughout the structure which HMZs are promising for gas adsorption an

d separation applications under high space velocities and abrasive environments. However

most zeolites cannot be directly extruded due to their lack of plasticity similar to clay. Therefore

the plasticity of zeolite pastes needs to be determined for optimizing the extrusion process with an optimal composition. Here in

a novel analytical method was developed to characterize the plastic behavior of zeolite pastes based on the stress-deformation curve. This curve was divided into elastic

yield

and plastic zones under defined conditions. Empirical equations were also established to predict the extrusion workability of ZSM-5 zeolite pastes by considering the effects of their composition and preparation processes. The plastic behavior of the ZSM-5 zeolite paste differed from those of ceramic and clay pastes (such as Al

and SiO

)

particularly in the plastic zone. Using montmorillonite as an inorganic binder prevented the formation of shear-thickening branches within the elastic zone of the stress-deformation curves

contrary to those observed in the curves for kaolin and attapulgite. Methyl cellulose and hydroxypropyl methyl cellulose enhanced the plasticity of the paste

and the latter improved the yield stress more effectively. The ZSM-5 zeolite paste

with a liquid-solid ratio of 44.5

successfully met the plastic-zone conditions without the influence of deformation rates and exhibited optimized extrusion workability. In addition

vacuum refining considerably enhanced extrusion workability by reducing the air content and interparticle spacing in the ZSM-5 powder. The accuracy of the proposed method for predicting the extrusion behavior of HMZs was verified

via

extrusion experiments. The results yielded valuable insights into optimizing the extrusion workability of zeolite pastes.

关键词

Keywords

references

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