title: Ozonolysis: An advantageous pretreatment for lignocellulosic biomass revisited.
abstract: Ozonolysis, as a lignocellulosic biomass pretreatment, goes back to 80s; however, in the last years it is becoming widespread again owing to its efficiency and mild operation conditions. Ozone reacts preferably with lignin than carbohydrates, promoting biomass destructuration and delignification, and so the sugar release by enzymatic hydrolysis. The hydrolysate from pretreated biomass has being used as sugars source for second-generation fuels production, mainly ethanol, methane and hydrogen. Short-chain carboxylic acids are the main inhibitory compounds generated, being properly removed by water washing. The most common inhibitory compounds reported for other pretreatments, furfural and HMF (5-hydroxymethylfurfural), are not found in ozone-pretreated hydrolysates. Composition of pretreated biomass and ozone consumption depends on several process parameters: reactor design, moisture content, particle size, pH, reaction time, ozone/air flow and ozone concentration. Additional studies are necessary to clarify process parameters effect and to optimize the process to achieve high yields with economic feasibility.
authors.affiliation: Department of Chemical Engineering and Environmental Technology, University of Valladolid, Calle Doctor Mergelina s/n, 47011 Valladolid, Spain.
authors.forename: Rodolfo
authors.initials: R
authors.lastname: Travaini
authors.affiliation: Department of Chemical Engineering and Environmental Technology, University of Valladolid, Calle Doctor Mergelina s/n, 47011 Valladolid, Spain.
authors.forename: Judit
authors.initials: J
authors.lastname: Martín-Juárez
authors.affiliation: Department of Chemical Engineering and Environmental Technology, University of Valladolid, Calle Doctor Mergelina s/n, 47011 Valladolid, Spain.
authors.forename: Ana
authors.initials: A
authors.lastname: Lorenzo-Hernando
authors.affiliation: Department of Chemical Engineering and Environmental Technology, University of Valladolid, Calle Doctor Mergelina s/n, 47011 Valladolid, Spain. Electronic address: silvia@iq.uva.es.
authors.forename: Silvia
authors.initials: S
authors.lastname: Bolado-Rodríguez
mesh_terms: D056804:Biofuels / Q000032:analysis*; D018533:Biomass; D002241:Carbohydrates / Q000737:chemistry; D002482:Cellulose / Q000737:chemistry*; D000431:Ethanol; D005662:Furaldehyde / Q000031:analogs & derivatives; D006868:Hydrolysis; D008031:Lignin / Q000737:chemistry*; D010126:Ozone / Q000737:chemistry*; D010316:Particle Size; D012037:Refuse Disposal / Q000379:methods
chemical_list: D056804:Biofuels; D002241:Carbohydrates; D000431:Ethanol; D010126:Ozone; C008046:5-hydroxymethylfurfural; D002482:Cellulose; D008031:Lignin; D005662:Furaldehyde
keywords: Biofuel; Lignocellulosic biomass; Ozone; Pretreatment; Sugar release