Energy Balance of Global CO_2 Recycling and Amounts of Reduction of CO_2 Emission

概要

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On the basis of tailoring of amorphous alloy electrodes for seawater electrolysis to form H_2 and amorphous alloy catalysts for conversion of CO_2 to CH_4, we are proposing global CO_2 recycling : At deserts; power generation by solar energy, at coasts close to the deserts; production of H_2 by electrolysis of seawater, production of CH_4 by the reaction of H_2 and CO_2 transported, and at energy consuming districts; combustion of CH_4, recovery of CO_2 and transportation of liquefied CO_2 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 CO_2 emission in the global CO_2 recycling between Middle East and Japan are estimated for the operation of a 1 GW CH_4-combustion power plant. The energy consumed in a year up to liquefaction of CH_4 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 CO_2 recycling is only 8.7% higher than the energy necessary for LNG combustion for power generation without control of CO_2 emission. The extra energy is for recovery, liquefaction and transportation of CO_2. The reduction of CO_2 emission by the global CO_2 recycling is 79% of CO_2 emission from an LNG combustion power plant, that is, 2.62 Mtons/year.Global CO_2 recyclingCO_2CH_4electrodecatalystglobal warmingenergy supply
東北大学の論文
1997-03-25