An evaluation of dilute acid and ammonia fiber explosion pretreatment for cellulosic ethanol production. (January 2016)

• Record Type: Journal Article
• Authors: Mathew, Anil Kuruvilla; Parameshwaran, Binod; Sukumaran, Rajeev Kumar; Pandey, Ashok
• Is Part Of: Bioresource technology. Volume 199(2016)
• Page Start: 13
• Page End: 20
• Publication Date: 2016-01
• Subjects: Dilute acid -- Ammonia fiber explosion -- Pretreatment -- Enzymatic hydrolysis -- Corn stover; Biomass -- Periodicals; Biomass energy -- Periodicals; Bioremediation -- Periodicals; Agricultural wastes -- Periodicals; Factory and trade waste -- Periodicals; Organic wastes -- Periodicals; Bioénergie -- Périodiques; Déchets agricoles -- Périodiques; Déchets industriels -- Périodiques; Déchets organiques -- Périodiques; Déchets (Combustible) -- Périodiques; 662.88
• DOI: 10.1016/j.biortech.2015.08.121
• Languages: English
• ISSNs: 0960-8524

Abstract

Highlights: AFEX treated corn stover resulted in larger pore size compared to DA. Nonspecific adsorption of cellulases was lower in AFEX treated biomass. Higher adsorption of cellulase onto AFEX treated cellulose than DA. AFEX treated hydrolysate was superior to DA for ethanol production. Abstract: The challenge associated with cellulosic ethanol production is maximizing sugar yield at low cost. Current research is being focused to develop a pretreatment method to overcome biomass recalcitrance in an efficient way. This review is focused on two major pretreatments: dilute acid (DA) and ammonia fiber explosion (AFEX) pretreatment of corn stover and how these pretreatment cause morphological and chemical changes to corn stover in order to overcome the biomass recalcitrance. This review highlights the key differences of these two pretreatments based on compositional analysis, cellulose and its crystallinity, morphological changes, structural changes to lignin, enzymatic reactivity and enzyme adsorption onto pretreated solids and finally cellulosic ethanol production from the hydrolysate of DA and AFEX treated corn stover. Each stage of the process, AFEX pretreated corn stover was superior to DA treated corn stover.