Pretreatment with Protic Ionic Liquids: Effect of Severity and Influence of Sub/super-critical CO Atmosphere on Pretreatment Performance

Overview

Journal RSC Adv

Publisher Royal Society of Chemistry

Specialty Chemistry

Date 2022 May 2

PMID 35493672

Authors

Francisco Malaret

Florence J V Gschwend

Joana M Lopes

Wei-Chien Tu

Jason P Hallett

Affiliations

Soon will be listed here.

Abstract

Deconstruction of lignocellulosic biomass with low-cost ionic liquids (ILs) has proven to be a promising technology that could be implemented in a biorefinery to obtain renewable materials, fuels and chemicals. This study investigates the pretreatment efficacy of the ionoSolv pretreatment of using the low-cost ionic liquid triethylammonium hydrogen sulfate ([N][HSO]) in the presence of 20 wt% water at 10% solids loading. The temperatures investigated were 120 °C and 150 °C. Also, the influence of performing the pretreatment under sub-critical and supercritical CO was investigated. The IL used is very effective in deconstructing eucalyptus, producing cellulose-rich pulps resulting in enzymatic saccharification yields of 86% for some pretreatment conditions. It has been found that under a CO atmosphere, the ionoSolv process is pressure independent. The good performance of this IL in the pretreatment of eucalyptus is promising for the development of a large-scale ionoSolv pretreatment processes.

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