Extraction of methane hydrate energy by carbon dioxide injection-key challenges and a paradigm shift

doi:10.1016/j.cjche.2019.02.031

Abstract

Abstract: Significant effort including field work has been devoted to develop a natural gas extraction technology from natural gas hydrate reservoirs through the injection of carbon dioxide. Natural gas hydrate is practically methane hydrate. The hypothesis is that carbon dioxide will be stored as hydrate owing to its favorable stability conditions compared to methane hydrate. Although the dynamics of the CO₂/CH₄ exchange process are not entirely understood it is established that the exchange process is feasible. The extent is limited but even if the CH₄ recovery is optimized there is a need for a CH₄/CO₂ separation plant to enable a complete cyclic sequence of CO₂ capture, injection and CH₄ recovery. In this paper we propose an alternative paradigm to the Inject (CO₂)/Exchange with (CH₄)/Recover (CH₄) one namely Recover (CH₄) first and then Inject (CO₂) for Storage.

Key words: Carbon dioxide hydrate, Methane hydrate, Carbon storage, Carbon sequestration, Energy, Paradigm shift

摘要： Significant effort including field work has been devoted to develop a natural gas extraction technology from natural gas hydrate reservoirs through the injection of carbon dioxide. Natural gas hydrate is practically methane hydrate. The hypothesis is that carbon dioxide will be stored as hydrate owing to its favorable stability conditions compared to methane hydrate. Although the dynamics of the CO₂/CH₄ exchange process are not entirely understood it is established that the exchange process is feasible. The extent is limited but even if the CH₄ recovery is optimized there is a need for a CH₄/CO₂ separation plant to enable a complete cyclic sequence of CO₂ capture, injection and CH₄ recovery. In this paper we propose an alternative paradigm to the Inject (CO₂)/Exchange with (CH₄)/Recover (CH₄) one namely Recover (CH₄) first and then Inject (CO₂) for Storage.

关键词: Carbon dioxide hydrate, Methane hydrate, Carbon storage, Carbon sequestration, Energy, Paradigm shift

Peter Englezos. Extraction of methane hydrate energy by carbon dioxide injection-key challenges and a paradigm shift[J]. Chinese Journal of Chemical Engineering, 2019, 27(9): 2044-2048.

Peter Englezos. Extraction of methane hydrate energy by carbon dioxide injection-key challenges and a paradigm shift[J]. 中国化学工程学报, 2019, 27(9): 2044-2048.

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