Proposal for a low CO2 emission power generation system utilizing oceanic methane hydrate

Shigenao Maruyama, Koji Deguchi, Masazumi Chisaki, Junnosuke Okajima, Atsuki Komiya, Ryo Shirakashi

Research output: Contribution to journalArticlepeer-review

35 Citations (Scopus)


A power generation system with low carbon dioxide (CO2) emission is proposed. This system simultaneously performs power generation, methane hydrate utilization, and carbon dioxide capture and storage (CCS). In this system, CO2 resulting from the combustion is recovered by compressed seawater. A thermal stimulation method was selected to dissociate the oceanic methane hydrate. CO2-dissolved seawater is heated by the exhausted gas and injected into the hydrate layer to dissociate the methane hydrate. By means of process simulation, a feasibility study of the proposed system was conducted, during which a power generation system with approximately 30% thermal efficiency and above 90% CO2 recovery rate was achieved. Moreover, to quantify the heat loss during the injection of hot seawater into the hydrate layer, we conducted a numerical simulation of the internal pipe flow and determined that the appropriate pipe diameter can be selected in terms of heat and pressure loss through the pipe. In addition, the outlet temperature can be predicted by the thermal conductivity and the thickness of the insulation material. An appropriate insulation material can be selected to obtain the desired outlet temperature.

Original languageEnglish
Pages (from-to)340-347
Number of pages8
Issue number1
Publication statusPublished - 2012 Nov


  • Methane hydrate
  • Physical absorption method
  • Power generation system
  • Thermal stimulation method

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Building and Construction
  • Modelling and Simulation
  • Renewable Energy, Sustainability and the Environment
  • Fuel Technology
  • Energy Engineering and Power Technology
  • Pollution
  • Energy(all)
  • Mechanical Engineering
  • Industrial and Manufacturing Engineering
  • Management, Monitoring, Policy and Law
  • Electrical and Electronic Engineering


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