Abstract

Abstract Mitsubishi Heavy Industries, Ltd. (MHI) and The Kansai Electric Power Co., Inc. have been developing flue gas CO recovery technology since 1990 as a measure against Global Warming. As a result of the research and development efforts which have now been carried out for seven years, the new energy-efficient solvents KS-1 and KS-2 which are less corrosive and cause less degradation than those used previously, have been developed. In addition, a research has produced a new packing, KP-1, that can reduce the size of CO2 absorbers and the horsepower requirements of flue gas blowers. The pilot plant, which is located in Nanko Power Plant of The Kansai Electric Power Co., Inc. has been used for the pilot tests of The Central Electric Power Council targeted for all utility companies in Japan and MHI since the fiscal year of 1995. The newest developments are presented in this paper, as well as a cost study of power plants flue gas CO2 recovery and compression to evaluate application of the technology for enhanced oil recovery. This new flue gas CO2 recovery technology, in comparison with the conventional technology (Monoethanol Amine Process), dramatically reduces the CO2 recovery cost. A cost evaluation study reveals, if the power plant is located near the oil field (a couple of hundred kilometers), it is feasible to supply CO2 at 1 USD/MSCF or below, while if the fuel (gas or coal) cost is around 0.5 USD/MMBTU, CO2 recovery and compression cost can be reduced to 0.7 USD/MSCF. These CO2 delivery costs are equivalent to CO2 delivery cost in the United States for enhanced oil recovery. P. 333

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