Energy balance of global CO2 recycling and amounts of reduction of CO2 emission

K. Hashimoto, Eiji Akiyama, H. Habazaki, A. Kawashima, M. Komori, K. Shimamura, N. Kumagai

Research output: Contribution to journalArticlepeer-review

11 Citations (Scopus)


On the basis of tailoring of amorphous alloy electrodes for seawater electrolysis to form H2 and amorphous alloy catalysts for conversion of CO2 to CH4, we are proposing global CO2 recycling: At deserts; power generation by solar energy, at coasts close to the deserts; production of H2 by electrolysis of seawater, production of CH4 by the reaction of H2 and CO2 transported, and at energy consuming districts; combustion of CH4, recovery of CO2 and transportation of liquefied CO2 to the coast close to the deserts. Since Egyptian scientists agree with us to do collaboration, the energy balance and the amount of reduction of CO2 emission in the global CO2 recycling between Middle East and Japan are estimated for the operation of a 1 GW CH4-combustion power plant. The energy consumed in a year up to liquefaction of CH4 including that corresponding to the repayment of solar power plant is almost the same as that spent up to obtaining LNG. The energy necessary for the global CO2 recycling is only 8.7% higher than the energy necessary for LNG combustion for power generation without control of CO2 emission. The extra energy is for recovery, liquefaction and transportation of CO2. The reduction of CO2 emission by the global CO2 recycling is 79% of CO2 emission from an LNG combustion power plant, that is, 2.62 Mtons/year.

Original languageEnglish
Pages (from-to)153-160
Number of pages8
JournalScience Reports of the Rerearch Institutes Tohoku University Series A-Physics
Issue number2
Publication statusPublished - 1997 Mar 1


  • CH
  • CO
  • Catalyst
  • Electrode
  • Energy supply
  • Global CO recycling
  • Global warming

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Metals and Alloys


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