바이오 에탄올 생산을 위한 Membrane-Aided Distillation에 의한 물-에탄올 분리공정에 관한 연구

국문 초록 (Abstract)

이축연신 나이론 막을 사용한 단일투과증발막 셀을 이용하여 공급액의 온도 및 농도에 따른 투과실험식을 구하고, 투과증발막 모듈을 사용하여 이 실험식의 적합성 및 투과시 소요되는 소비에너지를 산출하였다. 투과증발막 모듈을 이용해서 투과측의 압력이 2 ㎜Hg와 20 ㎜Hg의 경우 공급액의 에탄올 농도 90 wt%를 99.5 wt%로 농축시키는 경우, 투과측압력이 2 ㎜Hg일 때가 20 ㎜Hg일 때에 비해 동일조건의 에탄올 농축을 위한 막의 면적이 증가하였다. 각 압력의 조건에서 나이론 막을 이용한 membrane-aided distillation의 모사를 한 막의 투과속도 및 선택성에 대한 실험식을 도출하고 이를 이용하여 10 wt%의 에탄올 수용액을 99.5 wt%로 농축하는 membrane-aided distillation공정의 소비에너지를 구하였다. 그 결과 막의 투과량이 과다한 경우 다시 증류탑에서 재 농축을 해야하므로 막에 의한 에너지소비 절감효과가 상쇄될 수 있음을 보여주었다. 따라서 이 공정에 의해 에탄올을 농축하는 경우 효과적으로 에너지를 절약하기 위해서는 막의 선택성이 매우 중요하다는 것을 보여주었다.

다국어 초록 (Multilingual Abstract)

Nylon membrane was used to separate ethanol-water by a pervaporation method. Experimental equations were derived to use the simulation of membrane-aided distillation using nylon. The increases in permeation pressure resulted in the decrease in selectivity and energy consumption. The energy cost to enrich ethanol from 94 wt% to 99.5 wt% was calculated to be 53.3 won/㎏ of ethanol with extractive distillation and 18.9 won/㎏ of ethanol with a pervaporation method. The saving energy by the pervaporation method is consumed by recycling the permeate residue into the distillation column in the membrane-aided distillation column. Therefore, membrane with the high selectivity to minimize the permeate residue recycle is required to effectively enrich ethanol in the membrane-aided distillation method.

목차 (Table of Contents)

• 요약
• Abstract
• 1. 서론
• 2. 실험방법
• 3. 실험결과 및 고찰
• 4. 결론
• 참고문헌

참고문헌 (Reference)

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