Gasification is used today to convert a wide range of carbon-containing materials into clean synthesis gas. The reactions take place in a reducing atmosphere at elevated pressures and temperatures. Metals and mineral matters in the fuel are melted and recovered as slag. Pollutants, such as sulfur oxides, mercury and particulates are removed from the syngas prior to further processing to chemicals or prior to combustion in gas turbines (IGCC). Gasification today is not able to capitalize on one of its main features - the ability to capture a concentrated stream of CO2, with proven technology and cost-effectively. In a carbon constrained world, this benefit could further increase interest in this technology. High sustained energy prices are further contributing to the use of gasification to convert coal, petroleum coke, biomass, trash, and other carbon-containing materials to power, steam, hydrogen, substitute natural gas (SNG), chemicals, and fuels.