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Updated: Oct 10, 2025

Pretreatment of Lignocellulosic Biomass with Low-cost Ionic Liquids
Published on: August 10, 2016
Enhancing the interaction between cellulose and dilute aqueous ionic liquid solutions and its implication to ionic
Jinxu Zhang1, Dongzhe Zou1, Siyu Zhai1
1State Key Laboratory of Organic-Inorganic Composites and College of Life Science and Technology, Beijing University of Chemical Technology, North 3(rd) Ring East, # 15, Beijing 100029, China.
Abstract:
Cellulose-dissolving ionic liquids (ILs) have been used in biomass pretreatment for over a decade. Cellulose solubility in the ILs is strongly inhibited by water, which has negative impacts on IL pretreatment and reuse of the recycled ILs. Here, a distillation and aeration apparatus was used as the reactor for biomass pretreatment in dilute aqueous IL solutions and in recycled IL liquor without drying or purification. Four biomass types, switchgrass, miscanthus, sorghum and pine, were studied. X-ray diffraction (XRD) was used to measure the interaction between biomass and the IL. Small angle neutron scattering (SANS) was applied to monitor the changes of the pore structure in wet biomass samples. Satisfactory enzymatic hydrolysis results were obtained among all the pretreated samples.
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