EconPapers    
Economics at your fingertips  
 

A comparison of several organosolv pretreatments for improving the enzymatic hydrolysis of wheat straw: Substrate digestibility, fermentability and structural features

Hongmei Chen, Jia Zhao, Tianhang Hu, Xuebing Zhao and Dehua Liu

Applied Energy, 2015, vol. 150, issue C, 224-232

Abstract: Four organosolv pretreatment processes, namely Formiline, Acetoline, sulfuric acid-catalyzed ethanol (SACE) and auto-catalyzed ethanol (ACE) pretreatments were used to pretreat wheat straw under respective optimal conditions. Comparative studies were performed in terms of the enzymatic digestibility of cellulosic solids, simultaneous saccharification and fermentation (SSF) for ethanol production, mass balance analysis and structural features of the pretreated solids. The results indicated that Formiline and Acetoline pretreatments showed higher degrees of delignification, lower xylose degradation and lower solid glucan recoveries than SACE and ACE processes. The SACE and ACE pretreated solids still had high lignin contents but demonstrated higher initial enzymatic hydrolysis rates than Formiline and Acetoline pretreated solids. Formiline pretreatment obtained the highest final enzymatic glucan conversion, glucose concentration and ethanol yield, while Acetoline pretreatment obtained the lowest. After organosolv pretreatment, the compact and beehive-like cell wall structure was disrupted and cellulose fibers became separated. The SACE and ACE pretreated solids showed more depositions on fiber surface, which probably came from the condensation and precipitation of lignin.

Keywords: Lignocellulosic biomass; Wheat straw; Organosolv pretreatment; Delignification; Enzymatic hydrolysis; Ethanol (search for similar items in EconPapers)
Date: 2015
References: View complete reference list from CitEc
Citations View citations in EconPapers (5) Track citations by RSS feed

Downloads: (external link)
http://www.sciencedirect.com/science/article/pii/S0306261915004857
Full text for ScienceDirect subscribers only

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:eee:appene:v:150:y:2015:i:c:p:224-232

Ordering information: This journal article can be ordered from
http://www.elsevier.com/wps/find/journaldescription.cws_home/405891/bibliographic
http://www.elsevier. ... 405891/bibliographic

Access Statistics for this article

Applied Energy is currently edited by J. Yan

More articles in Applied Energy from Elsevier
Series data maintained by Dana Niculescu ().

 
Page updated 2017-09-29
Handle: RePEc:eee:appene:v:150:y:2015:i:c:p:224-232