整体煤气化联合循环（Integrated Gasification Combined Cycle，IGCC），是将煤气化技术和联合循环相结合的动力系统。

在该系统中，煤或其他碳基燃料在气化炉中的欠氧和高压环境下气化后经过除尘、脱硫的净化，成为清洁的天然气 - 合成煤气（合成气），再使用燃气蒸汽联合循环发电技术发电。

煤气化技术种类很多，分类方法也有多种。根据气化炉**流的形式，可分为固定床、流化床及气流床三大类。 根据IGCC的特点和要求，大型化的气化技术中，目前应用最多的是气流床技术。气流床技术中按原料进料方式可分为干煤粉进料及水煤浆进料两类。

An integrated gasification combined cycle (IGCC) is a technology that uses a high pressure gasifier to turn coal and other carbon based fuels into pressurized gas—synthesis gas (syngas). It can then remove impurities from the syngas prior to the power generation cycle. Some of these pollutants, such as sulfur, can be turned into re-usable byproducts through the Claus process. This results in lower emissions of sulfur dioxide, particulates, mercury, and in some cases carbon dioxide. With additional process equipment, a water-gas shift reaction can increase gasification efficiency and reduce carbon monoxide emissions by converting it to carbon dioxide. The resulting carbon dioxide from the shift reaction can be separated, compressed, and stored through sequestration. Excess heat from the primary combustion and syngas fired generation is then passed to a steam cycle, similar to a combined cycle gas turbine. This process results in improved thermodynamic efficiency compared to conventional pulverized coal.