Research on micro mechanism and influence of hydrate-based methane-carbon dioxide replacement for realizing simultaneous clean energy exploitation and carbon emission reduction

Chun-Gang Xu, Wei Zhang, Ke-Feng Yan, Jing Cai, Zhao-Yang Chen, Xiao-Sen Li*

*Corresponding author for this work

Research output: Contribution to journalJournal articlepeer-review

Abstract

New energy development and carbon emission reduction are two important issues of sustainable development for human beings. Hydrate-based methane - carbon dioxide (CH4-CO2) replacement is the promising technology for it can realize CH4 production from natural gas hydrate (NGH) and CO2 capture and sequestration (CCS) in the strata simultaneously and stably. This work reported the micro mechanism and the influence of the hydrate-based CH4-CO2 replacement by differential scanning calorimetry (DSC) measurements and in situ Raman spectroscopy measurements. It was found the replacement is affected by the potential energy of destruction (Eped) and the binding energy (Eb). The replacement
happens only when the Eped is larger than the Eb. The concentration of CO2 around the hydrate is the controlling influence on the replacement. The higher the concentration of CO2, the greater the Eped, and the higher CH4 production efficiency.
Original languageEnglish
Article number117266
JournalChemical Engineering Science
Volume248
Number of pages10
ISSN0009-2509
DOIs
Publication statusPublished - 2021

Keywords

  • Natural gas hydrate
  • CH4-CO2 replacement
  • Microcosmic mechanism
  • Methane recovery
  • CCS

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