The Relationship between Thermal Characteristics and Microstructure/Composition of Carbon Dioxide Hydrate in the Presence of Cyclopentane

Chun-Gang Xu, Min Wang, Gang Xu, Xiao-Sen Li, Wei Zhang, Jing Cai and Zhao-Yang Chen
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Chun-Gang Xu: Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, China
Min Wang: Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, China
Gang Xu: Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, China
Xiao-Sen Li: Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, China
Wei Zhang: Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, China
Jing Cai: Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, China
Zhao-Yang Chen: Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, China

Energies, 2021, vol. 14, issue 4, 1-17

Abstract: Hydrate-based carbon dioxide (CO 2 ) separation and capture is a new technology for achieving CO 2 emission reduction. However, it is still not commercially applied for the ambiguity of microscopic hydrate formation mechanism. In a constant volume experiment of hydrate formation, there are two or more pressure platforms, indicating that there might be two or more different hydrates formation in succession. In order to reveal the relationship between the microscopic process and the gas consumption in the process of hydrate formation, hydrate composition and formation mechanism of cyclopentane-CO 2 (CP-CO 2 ) system was investigated using a differential scanning calorimeter (DSC) and Raman spectroscopy. The results indicated CO 2 -CP binary hydrate and CO 2 hydrate are formed successively, and they coexist in the final hydrate. CP-CO 2 binary hydrates forms preferentially, and as crystal seeds, inducing the formation of CO 2 hydrates. The two hydrates formation processes cause the two pressure-drops. The results provide a scientific basis for increasing the gas consumption in different stages of gas hydrate formation in the presence of hydrate formation promoter.

Keywords: carbon emission reduction; hydrate; microscopic mechanism; binary hydrate; DSC (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: 2021
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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