81 巻 (2016) 6 号 p. 452-457
CO2 separation technology is essentially important to develop natural gas fields including CO2 gas, especially gas fields with CO2 gas of high concentration, and to utilize collected CO2 gas in oil fields applying CO2-Enhanced Oil Recovery (EOR). Japan Oil, Gas and Metals National Corporation (JOGMEC), Chiyoda Corporation and Mitsubishi Chemical Corporation have been developing CO2 separation technology using chabazite type zeolite membrane in the framework of JOGMEC's Technical Solution Program since 2013. The developed technology features its high CO2/CH4 separation factor as well as excellent high CO2 permeability. As the results obtained in the basic research works using simulations as well, it is found that a compact system for CO2 separation with minimum energy consumption can be provided with this technology, especially in the case where this CO2 separation technology is applied to gas fields with high gas pressure in the gas well, and compressors are not required for the separation processing and single stage type of this separation process is employed. For example, the energy consumption of the hybrid system which employs this developed zeolite membrane process and Acid Gas Removal (AGR) employing amine solution method is expected to be reduced by approximately 60% at the highest, compared to that of AGR single system in some case. Besides, the total value of CAPEX and OPEX for ten years on the hybrid system is expected to be reduced by 30% at the highest, compared to that of AGR single system in this case.