Current Activites for Commercialization of Oxyfuel Power Plant

Abstract

IHI has been developing oxyfuel technology as one of the CO2 capture technologies from coal fired power plants since 1989. For the demonstration of oxyfuel combustion technology, IHI jointly formed and participated in “Callide Oxyfuel Project” with Australian and Japanese partners in 2008. In the Project, the applicability of the technology to an existing power plant, the reliability and the effectiveness for CCS were demonstrated through achievement of more than 10,000 hours oxyfuel operation and underground injection of CO2 that captured from oxyfuel coal power plant. After completion of the demonstration, additional tests were carried out in the laboratory and at the pilot-scale combustion test facilities in IHI’s Aioi Works. The additional test purpose is to check the performance of the equipment mostly used in current power plants in order for the technology to be flexibly applied to them. For example, the vertical type roller mill and the ESP were tested. In vertical type roller mill test, it was made clear that the effect of moisture concentrated in the flue gas in oxyfuel system was not so big for the pulverization of coal. In ESP test, it was clearly found that the dust collection efficiency in oxyfiring combustion is higher than that in airfiring combustion.