Abstract
Tens of million tons per year of CO2 are being captured from raw feed gas by natural gas plants and are then being released to the atmosphere. As interest in reducing CO2 emissions from the natural gas plants has increased in recent years, CO2 capture and storage (CCS) has gained in importance. Among the several types of CO2 capture technologies, chemical solvent based technology is widely used to meet product natural gas specification in CO2 contentThis paper discusses a new chemical solvent based CO2 capture technology (HiPACT ; High Pressure Acid-gas Capture Technology), a new concept to improve economic efficiency in CCS implementation, jointly developed by JGC and BASF. The solvent has high stability against thermal degradation, which enables high pressure and elevated temperature operation during solvent regeneration to reduce CO2 compression cost downstream. The solvent also has a higher CO2 absorption capacity than commercially available solvent technologies, which results in decreased solvent circulation rates and lower AGRU (Acid Gas Removal Unit) capital and operating costs. After the concept has been confirmed with pilot plant runs with stimulant gas, a demonstration test using INPEX's commercial natural gas plant has successfully completed.
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