title: Lignocellulosic ethanol production without enzymes--technoeconomic analysis of ionic liquid pretreatment followed by acidolysis.
abstract: Deconstruction of polysaccharides into fermentable sugars remains the key challenge in the production of inexpensive lignocellulosic biofuels. Typically, costly enzymatic saccharification of the pretreated biomass is used to depolymerize its cellulosic content into fermentable monomers. In this work, we examined the production of lignocellulosic recovery, a process that does not require the use of enzymes to produce fermentable sugars. In the base case, the minimum ethanol selling price (MESP) was $8.05/gal, but with improved performance of the hydrolysis, extraction, and sugar recovery, the MESP can be lowered to $4.00/gal. Additionally, two scenarios involving lignin recovery were considered. Although the results based on current assumptions indicate that this process is expensive compared to more established technologies, improvements in the hydrolysis yield, the sugar extraction efficiency, and the sugar recovery were shown to result in more competitive processes.
authors.affiliation: Joint Bioenergy Institute, 5885 Hollis St., Emeryville, CA 94608, United States; Lawrence Berkeley National Laboratory, Physical Biosciences Division, 1 Cyclotron Road, Berkeley, CA 94720, United States. Electronic address: piotr.oleskowicz-popiel@put.poznan.pl.
authors.forename: Piotr
authors.initials: P
authors.lastname: Oleskowicz-Popiel
authors.affiliation: Joint Bioenergy Institute, 5885 Hollis St., Emeryville, CA 94608, United States; Lawrence Berkeley National Laboratory, Physical Biosciences Division, 1 Cyclotron Road, Berkeley, CA 94720, United States. Electronic address: DKlein@lbl.gov.
authors.forename: Daniel
authors.initials: D
authors.lastname: Klein-Marcuschamer
authors.affiliation: Joint Bioenergy Institute, 5885 Hollis St., Emeryville, CA 94608, United States; Lawrence Berkeley National Laboratory, Physical Biosciences Division, 1 Cyclotron Road, Berkeley, CA 94720, United States; Sandia National Laboratories, Biomass Science and Conversion Technology Department, Livermore, CA, United States. Electronic address: BASimmons@lbl.gov.
authors.forename: Blake A
authors.initials: BA
authors.lastname: Simmons
authors.affiliation: Joint Bioenergy Institute, 5885 Hollis St., Emeryville, CA 94608, United States; Lawrence Berkeley National Laboratory, Physical Biosciences Division, 1 Cyclotron Road, Berkeley, CA 94720, United States; University of California Berkeley, Department of Chemical Engineering, CA 94720, United States. Electronic address: blanch@berkeley.edu.
authors.forename: Harvey W
authors.initials: HW
authors.lastname: Blanch
mesh_terms: D000143:Acids / Q000737:chemistry*; D003365:Costs and Cost Analysis; D000431:Ethanol / Q000138:chemical synthesis*; D005240:Feasibility Studies; D052578:Ionic Liquids / Q000737:chemistry*; D008031:Lignin / Q000737:chemistry*
chemical_list: D000143:Acids; D052578:Ionic Liquids; C036909:lignocellulose; D000431:Ethanol; D008031:Lignin
keywords: Acidolysis; Biofuels; Ionic liquids; Pretreatment; Technoeconomic analysis