title: Effects of solubility properties of solvents and biomass on biomass pretreatment.
abstract: Hildebrand solubility parameters of biomasses and pretreatment solvents were examined by a method of intrinsic viscosity. This is to be used as basic information in selecting a suitable solvent for biomass pretreatment processes. The effects of mixing1-ethyl-3-methylimidazolium acetate (EMIM-AC) and different solvents, lignin content in a pretreatment solvent, and biomass type on the Hildebrand solubility parameter and thermodynamic properties were carried out and calculated in this work. The Hildebrand solubility parameters of the mixtures are according to those of organic solvents: δH[EMIM-AC/DMA]=25.07<δH[EMIM-AC/DMF]=25.48<δH[EMIM-AC/DMSO]=26.10<δH[EMIM-AC/Ethanolamine]=26.95. The Hildebrand solubility parameters of biomass compositions (microcrystalline cellulose, xylan and alkali lignin) and biomasses (cassava pulp residue and rice straw) vary in the ranges of 25.14-26.13. The increases of lignin content in the pretreatment solvents lead to the Hildebrand solubility parameter becoming closer to that of lignin.
authors.affiliation: School of Chemical and Biomedical Engineering, Nanyang Technological University, Singapore 637459, Singapore.
authors.forename: Piyarat
authors.initials: P
authors.lastname: Weerachanchai
authors.affiliation: School of Nano-Bioscience and Chemical Engineering, Ulsan National Institute of Science and Technology, Ulsan 689-798, Republic of Korea.
authors.forename: Sang Kyu
authors.initials: SK
authors.lastname: Kwak
authors.affiliation: School of Chemical and Biomedical Engineering, Nanyang Technological University, Singapore 637459, Singapore. Electronic address: jmlee@ntu.edu.sg.
authors.forename: Jong-Min
authors.initials: JM
authors.lastname: Lee
mesh_terms: D018533:Biomass; D007093:Imidazoles / Q000737:chemistry; D008031:Lignin / Q000032:analysis*; D012995:Solubility; D012997:Solvents / Q000737:chemistry*; D013816:Thermodynamics; D014783:Viscosity
chemical_list: D007093:Imidazoles; D012997:Solvents; D008031:Lignin; C518739:1-ethyl-3-methylimidazolium
keywords: Biomass; Hildebrand solubility parameter; Ionic liquid; Pretreatment