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Received October 26, 2010
Accepted November 15, 2010
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암모니아 Soaking 방법을 이용한 섬유소계 바이오매스의 전처리 특성
Pretreatment Characteristics of Ammonia Soaking Method for Cellulosic Biomass
경기대학교 화학공학과, 443-760 경기도 수원시 영통구 이의동 산 94-6 1삼성전자(주) 삼성종합기술원, 446-712 경기도 용인시 기흥구 농서동 산 14-1
Department of Chemical Engineering, Kyonggi University, San 94-6, Yiui-dong, Yeongtong-gu, Suwon-si, Gyeonggi 443-760, Korea 1Samsung Advanced Institute of Technology, San 14-1, Nongseo-dong Giheung-gu, Youngin-si, Gyeonggi 446-712, Korea
Korean Chemical Engineering Research, June 2011, 49(3), 292-296(5), NONE Epub 8 June 2011
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Abstract
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 oC, 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_x000D_
제거되었고 당전환율은 전처리하지 않는 것과 별다른 차이를 보이지 않았다.
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._x000D_
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.
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Kim KH, Tucker M, Nguyen Q, Bioresource Technology., “Conversion of Barkrich Biomass Mixture into Fermentable Sugar by Two-stage Dilute Acid-catalyzed Hydrolysis", 96, 1249 (2005)
Sherrard EC, Kressman FW, Eng. Chem., “Review of Processes in the United States Prior to World War II. Ind", 37, 5 (1945)
Lynd LR, Wyman CE, Gerngross TU, Biotechnol. Prog., “Biocommodityengineering", 15(5), 777 (1999)
Rani KS, Swamy MV, Seenayya G, Process Biochem., “Production Ofethanol from Various Pure and Natural Cellulosic Biomass by Clostridium Thermocellum Strains SS21 and SS22", 33(4), 435 (1998)
Bellamy WD, Biotechnol. Bioeng., “Single Cell Protein from Cellulosic Wastes", 26, 869 (1974)
Kim TH, Kim JS, Sunwoo C, Lee YY, Bioresour. Technol., “Pretreatment of Corn Stover by Aqueous Ammonia", 90(1), 39 (2003)
Kim TH, Taylor F, Hicks KB, Bioresource Technology., “Bioethanol Production from Barley Hull Using SAA(soaking in aqueous ammonia) Pretreatment", 99, 5694 (2008)
Kim TH, Lee YY, Appl. Biochem. Biotechnol., “Pretreatment of Corn Stover Bysoaking in Aqueous Ammonia", 121, 1119 (2005)
Kim TH, Lee YY, Bioresour. Technol., “Fractionation of Corn Stover by Hotwaterand Aqueous Ammonia Treatment", 97(2), 224 (2006)
Kim TH, Lee YY, Appl.Biochem. Biotechnol., “Pretreatment of Corn Stover by Soaking Inaqueous Ammonia at Moderate Temperature", 136, 81 (2007)
National Renewable Energy Laboratory, Standard Biomass Analytical Procedures. http://www.nrel.gov/biomass/analytical_ procedures.html.
