Method and system for reducing CO2 emissions from industrial processes

摘要

A method and an integrated system for reducing CO₂ emissions in industrial processes. The method and integrated system (100) capture carbon dioxide (CO₂) gas from a first gas stream (104) with a chemical absorbent to produce a second gas stream (106) having a higher concentration of carbon monoxide (CO) gas and a lower concentration of CO₂ gas as compared to first gas stream. The CO gas in the second gas stream is used to produce C₅ to C₂₀ hydrocarbons in an exothermic reaction (108) with hydrogen (H₂) gas (138). At least a portion of the heat generated in the exothermic reaction is used to regenerate the chemical absorbent with the liberation of the CO₂ gas (128) captured from the first gas stream. Heat captured during the exothermic reaction can, optionally, first be used to generate electricity, wherein the heat remaining after generating electricity is used to thermally regenerate the chemical absorbent.