요 약 Dimethyl Ether(DME)제조공정에서Abstract Carbon dioxide should be removed to increase the productivity of dimethyl ether(DME) from the DME manufacturing process. In this study, carbon dioxide can be removed using a physical absorbent through a solvent absorption method and membrane separation method. After performing the simulation for the carbon dioxide removal process, the energy consumption of the processes was compared. Methanol was used as a physical absorbent for the rectisol process, dimethyl ethers of polyethylene glycol for the Selexol process and N-methyl pyrrolidone for the Purisol process. By performing the simulation for each process, the energy consumption was compared. The Purisol process had the lowest energy consumption, followed in order by the Selexol process, Rectisol process and Membrane process. Therefore, the Purisol process was the most suitable method for the carbon dioxide process in the DME manufacturing process.Key Words : Absorption method, Carbon dioxide removal process, DME manufacturing process, Energy consumptions, Membrane separation method 본 논문은 LNG플랜트 사업단 연구과제로 수행되었음. DME는 아래와 같은 반응 메커니즘을 통해 얻을 수 있다. 식 (1)과 식 (2)와 같이 메탄이 주성분인 천연가스
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