Taiichiro Suda

Development of energy saving technology for flue gas carbon dioxide recovery in power plant by chemical absorption method and steam system

The most important issue involved with the chemical absorption method for recovering carbon dioxide from a power plants flue gas is to develop energy-efficient absorbents. KS-1 absorbent was presented at ICCDR-2 in Kyoto. After the conference, efforts to develop energy-efficient absorbents have been made and a new absorbent KS-2 was developed as a result and its performance confirmed by the pilot plant. KS-2 has similar energy efficiency as KS-1 both of which require 20% less energy than MEA. KS-2 is however more stable than KS-1 and a more efficient absorbent for low CO2 content flue gas. Detailed steam system was also discussed in this conference and accurate calculation results were presented.

Research and development on energy saving technology for flue gas carbon dioxide recovery and steam system in power plant

The Kansai Electric Power Company and Mitsubishi Heavy Industries are jointly working on the development of CO2 recovery technology from combustion flue gas by the chemical absorption method. Recently our research and development work is focussing on the energy saving technology of CO2 recovery from flue gas. Among these energy saving technologies, the test results of several new energy saving solvents and very low pressure loss packing are presented. Also, the study results of an optimum steam system on the power station using the CO2 recovery process is presented.

Development of flue gas carbon dioxide recovery technology

Abstract In Japan, electric power companies account for about 30% of the total emitted CO2. Considering this, the Kansai Electric Company and Mitsubishi Heavy Industries are actively conducting research into flue gas carbon dioxide recovery. The research involves laboratory tests, bench scale tests, pilot plant tests and feasibility studies. The main efforts have been directed towards evaluating CO2 absorption performance, treating impurities in the flue gas and finding the most efficient integration of the CO2 recovery system into thermal power plants. This paper presents the results of these studies and outlines the areas where cost and energy savings can be made, to allow the practical use of flue gas carbon dioxide recovery processes in the power plant.