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Hydrate‐Based Gas Separation for Methane Recovery from Coal Mine Gas using Tetrahydrofuran
Author(s) -
Zhao Jianzhong,
Zhao Yangsheng,
Liang Weiguo
Publication year - 2016
Publication title -
energy technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.91
H-Index - 44
eISSN - 2194-4296
pISSN - 2194-4288
DOI - 10.1002/ente.201600047
Subject(s) - methane , tetrahydrofuran , clathrate hydrate , natural gas , hydrate , chemistry , coal , gas separation , methane gas , chemical engineering , organic chemistry , biochemistry , solvent , membrane , engineering
Coal mine methane (CMM) gas is an unconventional natural gas that can be used as a clean supplementary energy resource when the methane is enriched. In this work, a new technology for separating methane from low‐concentration CMM gas was investigated using gas hydrate formation in the presence of tetrahydrofuran (THF). The concentration of THF was fixed at 19 %, the initial pressure fixed at 0.3 MPa, 0.5 MPa, 0.8 MPa, 1.0 MPa, respectively, and the temperature was maintained at 278.15 K. The results indicated that gas hydrate formation and the separation of CH 4 can be easily achieved at 0.3–1.0 MPa in THF solution. It was determined that the hydrate‐based separation process for CH 4 recovery from the CMM gas mixture performed better at medium and low initial pressures. The separation factor decreased from 9.5451 to 7.1834 as the reaction pressure rose from 0.3 to 1.0 MPa.