Furfural and levoglucosenone production from the pyrolysis of ionic liquid pre-treated sugarcane straw
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ORIGINAL RESEARCH
Furfural and levoglucosenone production from the pyrolysis of ionic liquid pre-treated sugarcane straw Pobitra Halder . Sazal Kundu . Savankumar Patel . Mojtaba Hedayati Marzbali . Rajarathinam Parthasarathy . Kalpit Shah
Received: 18 May 2020 / Accepted: 19 October 2020 Ó Springer Nature B.V. 2020
Abstract The current work focuses on the comparison of renewable choline cation-based ionic liquids (ILs) with imidazolium cation-based ILs for their delignification performance. Choline cation-based ILs removed a higher percentage of lignin (78.1–83.7% vs. 51.4–64.5%) and hemicellulose (64.7–72.8% vs. 7.1–29.9%) from sugarcane straw pre-treatment compared to imidazolium cation-based ILs. This was mainly attributed to the presence of fewer alkyl group and extra –OH group in choline cation. In general, ILs pre-treatment significantly increased the volatile matter and reduced fixed carbon in regenerated cellulose-
rich material. Higher content of cellulose and higher crystallinity in the case of choline-based ILs enhanced the production of furfural and levoglucosenone from the pyrolysis of regenerated cellulose rich material. On the contrary, the presence of higher content of amorphous cellulose from imidazolium-based ILs, particularly 1-ethyl-3-methylimidazolium acetate produced c-butyrolactone. Therefore, ILs pre-treatment can be favourable for the selective production of platform chemicals via pyrolysis route.
Electronic supplementary material The online version of this article (https://doi.org/10.1007/s10570-020-03547-2) contains supplementary material, which is available to authorized users. P. Halder S. Kundu S. Patel M. H. Marzbali R. Parthasarathy K. Shah (&) Chemical and Environmental Engineering, School of Engineering, RMIT University, Melbourne, VIC 3000, Australia e-mail: [email protected]
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Cellulose
Graphic abstract
Keywords Green ionic liquids Lignocellulosic biomass Pre-treatment Pyrolysis Biochemicals Biorefinery
Introduction Lignocellulosic biomass is considered as one of the most effective renewable feedstocks for the sustainable production of chemicals and biofuels. Pre-treatment of lignocellulosic biomass has received significant attention and is considered to be an effective method for the deconstruction of the lignocellulosic structure prior to the further processing of biomass into fuels and chemicals (Chen et al. 2017). An effective pre-treatment of biomass can separate each of the fractions i.e., cellulose, lignin, and hemicellulose, which can be used as a feedstock for the selective production of various chemicals (i.e., anhydrosugars, phenols, furfural, etc.). Additionally, pre-treatment enhances the conversion efficiency of lignocellulosic biomass. For instance, enzymatic hydrolysis of pre-treated biomass exhibits higher sugars yield when compared with the hydrolysis of untreated biomass; anaerobic digestion of pre-treated lignocellulosic materials shows higher methane production compared to
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