Oligomer saccharide reduction during dilute acid pretreatment co-catalyzed with Lewis acids on corn stover biomass  

作　　者：John Degenstein Srinivas Reddy Kamireddy Melvin PTucker Yun Ji 

机构地区：[1]Department of Chemical Engineering,Purdue University,West Lafayette,Indiana 47907,USA [2]Department of Chemical Engineering,University of North Dakota,Grand Forks,North Dakota 58202,USA [3]National Renewable Energy Laboratory,Golden,Colorado 80401,USA

出　　处：《International Journal of Agricultural and Biological Engineering》2013年第2期54-62,共9页国际农业与生物工程学报（英文）

基　　金：This study was financially supported by National Renewable Energy Laboratory Subcontract No.AEV-0-40634-01;North Dakota Experimental Program to Stimulate Competitive Research(EPSCoR).

摘　　要：The dilute sulfuric acid pretreatment of lignocellulosic biomass is a well understood process that significantly enhances the yield of glucose after enzymatic saccharification.The goal of this research was to perform a systematic study to evaluate the yield of fermentable sugars during dilute sulfuric acid pretreatment that is co-catalyzed with the transition metal Lewis acid salts:AlCl_(3),FeCl_(2),FeCl_(3),and La(OTf)_(3).All Lewis acids apart from FeCl_(2)reduced the presence of xylo-oligomers by a large margin when compared to the non-co-catalyzed control sample pretreatments.The presence of these xylo-oligomers acts as inhibitors during enzymatic saccaharification step.The Lewis acids AlCl_(3),FeCl_(3),and La(OTf)_(3)were also able to marginally increase the overall enzymatic digestibility specifically for corn stover pretreated at 160℃with 10 mM of Lewis acids.The hard Lewis acid such as AlCl3 increased the formation inhibitory products such as furfural and 5-hydroxymethylfurfural(HMF).There was good correlation between reduction of xylo-oligomers and increased concentration furfural with increase in Lewis acid hardness.

关 键 词：PRETREATMENT corn stover BIOMASS BIOFUEL enzymatic saccharification Lewis acid transition metal 

分 类 号：O62[理学—有机化学]