As an estimated amount of coal deposits is large and coal is widely distributed in the world, supply of coal is stable. It is considered that coal will be one of the most important fuels for power generation in the future. However, the global warming problem has recently become a subject of the world, and one of the principal substances responsible for global warming is CO{sub 2} which coal exhausts. To develop a technology for reducing emissions of CO{sub 2} is an urgent need. The integrated gasification combined cycle (IGCC), an environment-friendly power generation system of high thermal efficiency, is being developed via various approaches around the world. Kawasaki Heavy Industries Ltd. has conducted R and D on a Coal Partial Combustor (hereinafter referred to as CPC) as a gasifier since 1984, jointly with Center for Coal Utilization, Japan. Since 1994, Chubu Electric Power Co., Inc. and Electric Power Development Co., Ltd. have been cooperating. Through this activity, a structure of the CPC has been established, and influences of operating parameters on performance have been clarified. The purpose of the present study is to develop a Pressurized CPC (hereinafter referred to as PCPC) as a gasifier for the IGCC systemmore » by applying these techniques. For the present study, the authors had conducted systematic experiments using a 7 t/d bench scale test facility. After that they had constructed a 25 t/d pilot plant in the yard of Wakamatsu coal utilization research center, Electric Power Development Co., Ltd., in Japan in November 1997, and have conducted various tests, such as air-blown two-stage gasification, oxygen-enriched gasification, the expansion of coal varieties. This paper describes conceptual structure of the PCPC and the test results of a 25 t/d pilot plant.« less