Shear-thickening behavior of Fe-ZSM5 zeolite slurry and its removal with alumina/boehmites

Xiao-guang Liu; Yan Li; Wen-dong Xue; Jia-lin Sun; Qian Tang

doi:10.1007/s12613-018-1615-6

Volume 25 Issue 6

Jun. 2018

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Article Navigation > International Journal of Minerals, Metallurgy and Materials > 2018 > 25(6): 682-688

Xiao-guang Liu, Yan Li, Wen-dong Xue, Jia-lin Sun, and Qian Tang, Shear-thickening behavior of Fe-ZSM5 zeolite slurry and its removal with alumina/boehmites, Int. J. Miner. Metall. Mater., 25(2018), No. 6, pp. 682-688. https://doi.org/10.1007/s12613-018-1615-6

Cite this article as:

Xiao-guang Liu, Yan Li, Wen-dong Xue, Jia-lin Sun, and Qian Tang, Shear-thickening behavior of Fe-ZSM5 zeolite slurry and its removal with alumina/boehmites, Int. J. Miner. Metall. Mater., 25(2018), No. 6, pp. 682-688. https://doi.org/10.1007/s12613-018-1615-6

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Research Article

Shear-thickening behavior of Fe-ZSM5 zeolite slurry and its removal with alumina/boehmites

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Corresponding author:
Xiao-guang Liu E-mail: liuxg@ustb.edu.cn
Received: 20 September 2017; Revised: 24 November 2017; Accepted: 10 January 2018

Abstract

Abstract

A cryogenic scanning electron microscopy (cryo-SEM) technique was used to explore the shear-thickening behavior of Fe-ZSM5 zeolite pastes and to discover its underlying mechanism. Bare Fe-ZSM5 zeolite samples were found to contain agglomerations, which may break the flow of the pastes and cause shear-thickening behaviors. However, the shear-thickening behaviors can be eliminated by the addition of halloysite and various boehmites because of improved particle packing. Furthermore, compared with pure Fe-ZSM5 zeolite samples and its composite samples with halloysite, the samples with boehmite (Pural SB or Disperal) additions exhibited network structures in their cryo-SEM images; these structures could facilitate the storage and release of flow water, smooth paste flow, and avoid shear-thickening. By contrast, another boehmite (Versal 250) formed agglomerations rather than network structures after being added to the Fe-ZSM5 zeolite paste and resulted in shear-thickening behavior. Consequently, the results suggest that these network structures play key roles in eliminating the shear-thickening behavior.
- Fe-ZSM5 zeolite;
- cryogenic scanning electron microscopy;
- shear-thickening behavior;
- zeta potential;
- boehmite

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