상위피인용논문
- 조회1,239
Auburn University
Abstract
Tae Hyun Kima, Jun Seok Kimb, Changshin Sunwooc, Y.Y Leea
a Department of Chemical Engineering, Auburn University, Auburn, AL 36849, USA
b Chemical Engineering, Kyonggi University, Suwon, South Korea
c Chemical Engineering, Chonnam National University, Gwangju, South Korea
Corresponding author : Y.Y Lee
Received 12 August 2002. Revised 12 March 2003. Accepted 14 March 2003. Available online 11 June 2003.
Abstract
Corn stover was pretreated with aqueous ammonia in a flow-through column reactor, a process termed ammonia recycled percolation (ARP). This method was highly effective in delignifying of the biomass, reducing the lignin content by 70?85%. Most lignin removal occurred within the first 20 min of the process. Lignin removal by ARP was further confirmed by FTIR analysis and lignin staining. The ARP process solubilized 40?60% of the hemicellulose but left the cellulose intact. The solubilized carbohydrate existed in oligomeric form. Carbohydrate decomposition during the pretreatment was insignificant. Corn stover treated for 90 min exhibited enzymatic digestibility of 99% with 60 FPU/g of glucan enzyme loading, and 92.5% with 10 FPU/g of glucan. The digestibility of ARP treated corn stover was substantially higher than that of α-cellulose. The enzymatic digestibility was related with the removal of lignin and hemicellulose, perhaps due to increased surface area and porosity. The SEM pictures indicated that the biomass structure was deformed and its fibers exposed by the pretreatment. The crystallinity index increased with pretreatment reflecting removal of the amorphous portion of biomass. The crystalline structure of the cellulose in the biomass, however, was not changed by the ARP treatment.
Keywords
Corn stover; Pretreatment; Aqueous ammonia; Enzymatic hydrolysis; Lignin; Hemicellulose
논문정보
- Research article
- 2003년 10월 (BRIC 등록일 )
- 국내+국외 연구진
- 120회 이상 인용된 논문
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