Efficient low temperature solvent removal of acid gases

摘要: A high pressure synthetic gas stream is produced by gasifying coal. Hydrogen sulfide removed contacting the with a physical solvent, such as an alcohol, in absorber column. low temperature maintained column, typically chilling both solvent and incoming stream, where portion of cooling requirement supplied adiabatically expanding cleaned exiting absorber. Typically, will be expanded turbine expander to provide mechanical energy addition capacity. The useful fuel or chemical feedstock.