Powerful peracetic acid–ionic liquid pretreatment process for the efficient chemical hydrolysis of lignocellulosic biomass. (August 2016)

• Record Type: Journal Article
• Authors: Uju, ; Goto, Masahiro; Kamiya, Noriho
• Is Part Of: Bioresource technology. Volume 214(2016)
• Page Start: 487
• Page End: 495
• Publication Date: 2016-08
• Subjects: Ionic liquid -- Hydrolysis -- Lignocellulosic biomass -- Peracetic acid; 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.2016.04.121
• Languages: English
• ISSNs: 0960-8524

Abstract

Graphical abstract: Highlights: A new method for efficient lignocellulosic biomass (LB) hydrolysis was proposed. LB was pretreated by peracetic acid (PAA) followed by ionic liquid-HCl hydrolysis. PAA treatment disrupted lignin fraction, and enhanced depolymerization of cellulose. At low molar HCl, [Bmpy][Cl]-HCl hydrolysis yielded 80–98% cellulose conversion. PAA-[Bmpy][Cl] treatment caused transformation from cellulose I to II. Abstract: The aim of this work was to design a new method for the efficient saccharification of lignocellulosic biomass (LB) using a combination of peracetic acid (PAA) pretreatment with ionic liquid (IL)-HCl hydrolysis. The pretreatment of LBs with PAA disrupted the lignin fractions, enhanced the dissolution of LB and led to a significant increase in the initial rate of the IL-HCl hydrolysis. The pretreatment of Bagasse with PAA prior to its 1-buthyl-3-methylimidazolium chloride ([Bmim][Cl])-HCl hydrolysis, led to an improvement in the cellulose conversion from 20% to 70% in 1.5 h. Interestingly, the 1-buthyl-3-methylpyridium chloride ([Bmpy][Cl])-HCl hydrolysis of Bagasse gave a cellulose conversion greater than 80%, with or without the PAA pretreatment. For LB derived from seaweed waste, the cellulose conversion reached 98% in 1 h. The strong hydrolysis power of [Bmpy][Cl] was attributed to its ability to transform cellulose I to II, and lowering the degree of polymerization of cellulose.