title: Recyclability of an ionic liquid for biomass pretreatment.
abstract: This study investigated the possibility of reusing an ionic liquid for the pretreatment of biomass. The effects of lignin and water content in a pretreatment solvent on pretreatment products were examined, along with the recyclability of an ionic liquid for pretreatment. It was discovered that the presence of lignin and water within a pretreatment solvent resulted in a far less effective pretreatment process. 1-Ethyl-3-methylimidazolium acetate/ethanolamine (60/40 vol%) presents more promising properties than EMIM-AC, providing a small decrease in sugar conversion and also a small increase of lignin deposition with an increasing lignin amount in the pretreatment solvent. Deteriorations of the ionic liquid were observed from considerably low sugar conversions and lignin extraction after using the 5th and 7th batch, respectively. Furthermore, the changes of ionic liquid properties and lignin accumulation in ionic liquid were determined by analyzing their thermal decomposition behavior (TGA) and chemical functional groups (FTIR and (1)H NMR).
authors: School of Chemical and Biomedical Engineering, Nanyang Technological University, Singapore 637459, Singapore.
authors: Piyarat
authors: P
authors: Weerachanchai
authors: School of Chemical and Biomedical Engineering, Nanyang Technological University, Singapore 637459, Singapore. Electronic address: jmlee@ntu.edu.sg.
authors: Jong-Min
authors: JM
authors: Lee
mesh_terms: D018533:Biomass; D001709:Biotechnology / Q000379:methods*; D007093:Imidazoles / Q000494:pharmacology; D052578:Ionic Liquids; D008031:Lignin / Q000032:analysis; D012275:Oryza / Q000737:chemistry / Q000187:drug effects; D066244:Proton Magnetic Resonance Spectroscopy; D059027:Recycling; D012997:Solvents; D014866:Waste Products
chemical_list: D007093:Imidazoles; D052578:Ionic Liquids; D012997:Solvents; D014866:Waste Products; D008031:Lignin; C518739:1-ethyl-3-methylimidazolium
keywords: Biomass; Ionic liquid; Pretreatment; Recycle; Reuse