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RITE and three national institutes have been jointly developing a CO2 mitigation system in the "Project of Chemical CO2 Fixation and Utilization Using Catalytic Hydrogenation Reaction" since 1990.

The concept of the system is comprised of the CO2 separation/recovery via membrane separation in large amounts of CO2 emitted from stationary sources such as power stations, ironworks, chemical plants and so on, tanker transportation of the CO2 to a coast close to a desert, H-2 production by water electrolysis generated by renewable energy, methanol synthesis From CO2 and H-2, and the transportation of the methanol produced to energy consumption site and/or as a chemical product

Analysis of conceptual designs and energy input for building plant energy input for running plant has been conducted based on a case using this system for a 1,000MW power plant, followed by an evaluation of the material balance and energy balance. Results showed 467 ton/h of CO2 out of 778 ton/h of the total CO2 emissions could be recovered and 323 ton/h (2.4million ton/y) of methanol could be produced.

Energy efficiency, the CO2 reduction rate and the balance ratio of the energy of the system is respectively 38%, 40% and 2, on the assumption that the primary energy was photovoltaic power generation, the stationary CO2 emission source was a coal fired power plant and the generation efficiency of the methanol power plant was 60%.

It dearly revealed that this system would be effective to reduce CO2 emissions and to utilize renewable energy.

Furthermore, the system was compared with a methane convert system and a liquid hydrogen transportation system, and it was proved that the energy efficiency of this system was higher.