Korean Chemical Engineering Research

The Korean Institute of Chemical Engineers (한국화학공학회)
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Pretreatment Characteristics of Ammonia Soaking Method for Cellulosic Biomass

암모니아 Soaking 방법을 이용한 섬유소계 바이오매스의 전처리 특성

  • 박용철 (경기대학교 화학공학과) ;
  • 김진우 (삼성전자(주) 삼성종합기술원) ;
  • 김준석 (경기대학교 화학공학과)
  • Published : 2011.06.30
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Abstract

Liberation of fermentable sugars from lignocellulosic biomass is one of the key challenges in production of cellulosic ethanol. Aqueous ammonia cleaves ether and ester bonds in lignin carbohydrate complexes. It is an effective swelling reagent for lignocellulosic biomass. The aqueous ammonia pretreatment selectively reduces the lignin content of biomass. However, at high temperatures, this process solubilizes more than 50% of the hemicellulose in the biomass. Here we conducted a SAA(Soaking in Aqueous Ammonia) process by moderate reaction temperatures at atmospheric pressure using various lignocellulosicbiomass. The optimum condition of this process was 15 wt% of aqueous ammonia at 50 of reaction time during 72 hr. The delignification was up to 60% basis on initial biomass and the enzymatic digestibility was 60-90% for agricultural biomass, respectively.

섬유소계 바이오매스의 전처리를 위한 암모니아수에 의한 침지공정(SAA; Soaking in Aqueous Ammonia)은 낮은 온도와 낮은 압력의 조건에서 수행하는 전처리 공정으로 고온고압이 필요로 하는 다른 전처리방법에 비해 그에 대한 비용을 절감할 수 있다는 장점이 있다. 본 연구에서는 다양한 바이오매스를 SAA공정에 적용시켜 그 특성을 보고자 한다. 실험을 행한 전처리 공정의 온도, 반응시간 그리고 암모니아수의 농도는 각각 $50{^{\circ}C}$, 72시간 그리고 15 wt%이다. 전처리 공정에 의해 초본계열은 탈리그닌이 초기 성분에 대해 60%로 되었고 전처리 전의 10-20%에 불과하던 당전환율이 전처리 후에 60-90%의 당전환율로 약 80%가 향상된 것으로 나타났지만 목본계열의 리그닌 성분은 10%정도만 제거되었고 당전환율은 전처리하지 않는 것과 별다른 차이를 보이지 않았다.

Keywords

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