CO2 enabled process integration for the production of cellulosic ethanol using bionic liquids
메타 데이터
바이오화학분류
바이오플라스틱
플라스틱
바이오정밀화학
용매
화학제품
연료
화장품용 기능성소재
계면활성제⁄증점제
의료용 화학소재
식품첨가제
논문
CO2 enabled process integration for the production of cellulosic ethanol using bionic liquids
학술지
Energy & environmental science
저자명
Sun, Jian; Konda, N. V. S. N. Murthy; Shi, Jian; Parthasarathi, Ramakrishnan; Dutta, Tanmoy; Xu, Feng; Scown, Corinne D.; Simmons, Blake A.; Singh, Seema
초록
<P>There is a clear and unmet need for a robust and affordable biomass conversion technology that can process a wide range of biomass feedstocks and produce high yields of fermentable sugars and biofuels with minimal intervention between unit operations. The lower microbial toxicity of recently-developed renewable ionic liquids (ILs), or bionic liquids (BILs), helps overcome the challenges associated with the integration of pretreatment with enzymatic saccharification and microbial fermentation. However, the most effective BILs known to date for biomass pretreatment form extremely basic pH solutions in the presence of water, and therefore require neutralization before the pH range is acceptable for the enzymes and microbes used to complete the biomass conversion process. Neutralization using acids creates unwanted secondary effects that are problematic for efficient and cost-effective biorefinery operations using either continuous or batch modes. We demonstrate a novel approach that addresses these challenges through the use of gaseous carbon dioxide to reversibly control the pH mismatch. This approach enables the realization of an integrated biomass conversion process that eliminates the need for intermediate washing and/or separation steps. A preliminary technoeconomic analysis indicates that this integrated approach could reduce production costs by 50-65% compared to previous IL biomass conversion methods studied.</P><P>Graphic Abstract</P><P>An integrated one-pot ionic liquid based biomass processing technology is developed that overcomes pH mismatch of the unit operations and enables ionic liquid reuse resulting in a 50% cost reduction compared with previously studied methods.<BR/><IMG SRC='http://pubs.rsc.org/services/images/RSCpubs.ePlatform.Service.FreeContent.ImageService.svc/ImageService/image/GA?id=c6ee00913a'/><BR/></P>