ABSTRACT
Both natural and synthetic gases carry impurities that must be removed before their downstream processing for heat, power, or liquid fuels. The nature of impurity depends on the source of natural and synthetic gas and its level of removal depends on the nature of the downstream applications. The removal of impurities are important for gas storage and transport as well. One big difference between impurities associated with natural gas and that from thermal gasication processes is the level of temperature of the gas. Natural gas is recovered at low temperatures, while synthesis gas produced by thermochemical processes is at higher temperatures. As shown in Section 7.10, more efforts are being made to remove impurities at higher temperatures from syngas for its better thermal integration with the downstream operations [1-5].
