Instrumental Methods for Cage Occupancy Estimation of Gas Hydrate

Wenjiu Cai, Xin Huang and Hailong Lu
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Wenjiu Cai: College of Engineering, Peking University, Beijing 100871, China
Xin Huang: SINOPEC Petroleum Exploration and Production Research Institute, Beijing 100083, China
Hailong Lu: Beijing International Center for Gas Hydrate, School of Earth and Space Sciences, Peking University, Beijing 100871, China

Energies, 2022, vol. 15, issue 2, 1-24

Abstract: Studies revealed that gas hydrate cages, especially small cages, are incompletely filled with guest gas molecules, primarily associated with pressure and gas composition. The ratio of hydrate cages occupied by guest molecules, defined as cage occupancy, is a critical parameter to estimate the resource amount of a natural gas hydrate reservoir and evaluate the storage capacity of methane or hydrogen hydrate as an energy storage medium and carbon dioxide hydrate as a carbon sequestration matrix. As the result, methods have been developed to investigate the cage occupancy of gas hydrate. In this review, several instrument methods widely applied for gas hydrate analysis are introduced, including Raman, NMR, XRD, neutron diffraction, and the approaches to estimate cage occupancy are summarized.

Keywords: gas hydrate; cage occupancy; Raman; NMR; XRD; neutron diffraction (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: 2022
References: View complete reference list from CitEc
Citations: View citations in EconPapers (3)

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