DME 합성 및 분리공정에서 CO2 제거를 위한 RectisolⓇ 공정과 SelexolTM 및 PurisolⓇ 공정 사이의 성능비교 = Comparison of CO2 Removal Capabilities among RectisolⓇ, SelexolTM, and PurisolⓇ Process for DME Synthesis and Separation Process

다국어 초록 (Multilingual Abstract)

In the dimethyl ether (DME) synthesis and separation process, over 8% by mole of CO2 is fed to the DME synthesis reactor which lowers DME productivity. Therefore, this work focused on the removal of CO2 using three kinds of processes with physical absorbents by comparing the utility consumption through computer simulation of each process. Among the processes selected for comparison are RectisolⓇ process using methanol, PurisolⓇ process using n-methyl pyrrolidone (NMP), and SelexolTM process using dimethyl ethers of polyethylene glycol (DEPG) as a solvent. As a result of this study, it was concluded that PurisolⓇ process consumes the least energy followed by SelexolTM process. Therefore, it is considered that PurisolⓇ process is the most suitable method to absorb CO2 contained in the feed of DME synthesis reactor.

국문 초록 (Abstract)

Dimethyl Ether (DME) 합성 및 분리공정에서 8% 이상의 CO2가 DME 합성반응기로 유입되면 DME 생산성이 저하되는 문제가 발생된다. 따라서 본 연구에서는 DME 합성기로 유입되는 CO2 제거를 위한 방법으로 물리적 흡수제를 이용한 대표적인 세 가지 공정에 대해 전산모사를 통해 에너지 소모량을 서로비교 하였다. 비교 대상으로 선정한 공정으로는 메탄올을 사용하는 RectisolⓇ 공정, 폴리에틸렌글리콜 디메틸에테르(dimethyl ethers of polyethylene glycol, DEPG)를 사용하는SelexolTM 공정 그리고 노말 메틸 피로리돈(n-methyl pyrrolidone, NMP)를 사용하는 PurisolⓇ 공정으로 하였다. 각 공정에대한 에너지 소모량을 비교해 본 결과 RectisolⓇ 공정 >> SelexolTM 공정 > PurisolⓇ 공정 순으로 에너지가 많게 소모됨을 알수 있었다. 그러므로 DME 제조공정에서 물리적 흡수제를 사용한 CO2제거공정으로 가장 적합한 공정은 PurisolⓇ 공정이라판단된다.

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