Enrichment of Hydrogen from a Hydrogen/Propylene Gas Mixture Using ZIF-8/Water-Glycol Slurry

Hai Li, Xueteng Gao, Chongzhi Jia, Wan Chen, Bei Liu, Lanying Yang, Changyu Sun and Guangjin Chen
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Hai Li: State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing 102249, China
Xueteng Gao: State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing 102249, China
Chongzhi Jia: State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing 102249, China
Wan Chen: State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing 102249, China
Bei Liu: State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing 102249, China
Lanying Yang: State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing 102249, China
Changyu Sun: State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing 102249, China
Guangjin Chen: State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing 102249, China

Energies, 2018, vol. 11, issue 7, 1-13

Abstract: In this work, zeolitic imidazolate framework-8 (ZIF-8), a subclass of metal organic frameworks (MOFs), was dispersed in a water-glycol solution to form a porous slurry. Using this porous slurry, a tail gas mixture containing hydrogen/propylene was separated. Experiments were performed to investigate the effects of using only the solid ZIF-8 material, a ZIF-8/water slurry, a ZIF-8/glycol slurry, or a ZIF-8/water-glycol slurry on the selectivity of the separation. The experimental results show that the slurry made from ZIF-8/water-glycol (20%) achieves good gas separation. The respective influences of the solid content, initial pressure, and temperature on the separation performance were also investigated in detail. We found that lower temperature, a ZIF-8 mass fraction of 20 wt %, and a higher operation pressure are suitable for the recovering of hydrogen from a H 2 /C 3 H 6 mixture. The selectivity of C 3 H 6 over H 2 reaches 128 at 680 kPa initial pressure. The slurries were completely reusable for at least three cycles. The structure of the ZIF-8 material was not altered after repeated separation, meaning the material can likely be reused more than three times on an industrial scale.

Keywords: porous slurry; adsorption; ZIF-8; separation; hydrogen (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2018
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