In an IGCC system coal is not burned but rather partially oxidized (reacted with limited quantities of oxygen from an air separation plant, and with steam) at high pressure in a gasifier.

• 在IGCC系统则不燃烧煤，而是让煤在与空气隔绝的高压气化炉中，与有限的氧气和蒸汽一同作用，进行部份氧化。