Characteristic Study on Water Absorption and Dehydration of 4A Molecular Sieve

Wang Hongliang; Zhang Zhen; Zhang Yongping; Hu Hongjie; Liu Hongzhao; Wang Wei

doi:10.3969/j.issn.1000-6532.2023.03.027

2023 No. 3

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Article navigation > Multipurpose Utilization of Mineral Resources > 2023 > 44(3): 161-164, 180

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Wang Hongliang, Zhang Zhen, Zhang Yongping, Hu Hongjie, Liu Hongzhao, Wang Wei. Characteristic Study on Water Absorption and Dehydration of 4A Molecular Sieve[J]. Multipurpose Utilization of Mineral Resources, 2023, 44(3): 161-164, 180. doi: 10.3969/j.issn.1000-6532.2023.03.027

Citation:

Wang Hongliang, Zhang Zhen, Zhang Yongping, Hu Hongjie, Liu Hongzhao, Wang Wei. Characteristic Study on Water Absorption and Dehydration of 4A Molecular Sieve[J]. Multipurpose Utilization of Mineral Resources, 2023, 44(3): 161-164, 180. doi: 10.3969/j.issn.1000-6532.2023.03.027

Characteristic Study on Water Absorption and Dehydration of 4A Molecular Sieve

1.
Zhengzhou Institute of Multipurpose Utilization of Mineral Resources, CAGS, China National Engineering Research Center for Utilization of Industrial Minerals, Key Laboratory for Polymetallic Ores' Evaluation and Utilization, MNR, Engineering Technology Innovation Center for Development and Utilization of High Purity Quartz ,Key Laboratory of Comprehensive Utilization of Gold Resource in Henan Province, Zhengzhou, Henan, China
2.
Northwest China Center for Geosience Innovation, Xi’an, Shaanxi, China
3.
China Astronaut Research and Training Center, Beijing, China

Received Date: 27 May 2020

Revised Date: 15 June 2020

Publish Date: 25 June 2023

Abstract

Abstract

This is a paper in the field of ceramics and composites. In order to understand the water content distribution characteristics of 4A molecular sieve in the process of water absorption and dehydration, the calculation methods of high temperature dehydration and low temperature water absorption were used to discuss the water content distribution of 4A molecular sieve under different desorption temperature and atmosphere. The results showed that when the desorption temperature was 200~230 ℃, the effective residual water was 4%~5%, the effective desorption water was 24%~25% and the water absorption was 83%~87% in the non vacuum air desorption under vacuum, the effective residual water was 1%~2%, the effective desorption water was 27%~28%, and the water absorption is 93%~97%. In order to make the effective residual water content less than 2%, the best desorption regeneration conditions are vacuum atmosphere and desorption temperature not less than 200 ℃.The effective dewater and residual water of molecular sieve in non vacuum atmosphere can be estimated by differential thermal analysis. The water absorption rate of the sample after vacuum desorption is higher than that of the sample without vacuum desorption.
- 4A molecular sieve /
- Ceramics and composites /
- Vacuum desorption /
- Effective adsorbed water /
- Effective residual water /
- Effective desorption water

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References

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