Thermodynamics and Kinetics of CO 2 /CH 4 Adsorption on Shale from China: Measurements and Modeling

Yuan Chi, Changzhong Zhao, Junchen Lv, Jiafei Zhao and Yi Zhang
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Yuan Chi: Key Laboratory of Ocean Energy Utilization and Energy Conservation of Ministry of Education, School of Energy and Power Engineering, Dalian University of Technology, Dalian 116024, China
Changzhong Zhao: Key Laboratory of Ocean Energy Utilization and Energy Conservation of Ministry of Education, School of Energy and Power Engineering, Dalian University of Technology, Dalian 116024, China
Junchen Lv: Key Laboratory of Ocean Energy Utilization and Energy Conservation of Ministry of Education, School of Energy and Power Engineering, Dalian University of Technology, Dalian 116024, China
Jiafei Zhao: Key Laboratory of Ocean Energy Utilization and Energy Conservation of Ministry of Education, School of Energy and Power Engineering, Dalian University of Technology, Dalian 116024, China
Yi Zhang: Key Laboratory of Ocean Energy Utilization and Energy Conservation of Ministry of Education, School of Energy and Power Engineering, Dalian University of Technology, Dalian 116024, China

Energies, 2019, vol. 12, issue 6, 1-13

Abstract: CO 2 -enhanced shale gas recovery (CO 2 -ESGR) sequestrates anthropogenic CO 2 and improves the profitability of shale gas exploitation. This work investigated the adsorption behaviors of CO 2 and CH 4 on shale from China at 20, 40, 60 and 80 °C. The pressure ranges for CO 2 and CH 4 were 1–5 and 1–15 MPa, respectively. The excess adsorbed amount of CH 4 increased with increasing pressure from the beginning to the end, while the maximum excess CO 2 adsorption was observed at approximately 4 MPa. The absolute average deviations (AADs) of CO 2 and CH 4 , determined by the Langmuir + k model, were 2.12–3.10% and 0.88–1.11%, respectively. Relatively good adsorptivity for CO 2 was exhibited when the pressure was less than 5 MPa, which was beneficial to the implementation of CO 2 -ESGR. With continuous increases in pressure, the adsorption capacity of CO 2 was weaker than that of CH 4 , suggesting that the injected CO 2 would reduce the partial pressure of CH 4 for CO 2 -ESGR and the displacement effect would no longer be significant. In addition, the adsorption rate of CO 2 was much faster than that of CH 4 . CO 2 was more active in the competitive adsorption and it was advantageous to the efficiency of CO 2 -ESGR.

Keywords: adsorption; thermodynamic models; CO 2 -ESGR; high pressures; kinetics (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: 2019
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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