TY - JOUR
T1 - Understanding the Role of Choline Chloride in Deep Eutectic Solvents Used for Biomass Delignification
AU - Smink, Dion
AU - Juan, Alberto
AU - Schuur, Boelo
AU - Kersten, Sascha R.A.
N1 - ACS deal
PY - 2019/9/11
Y1 - 2019/9/11
N2 - The role of choline chloride in biomass delignification by a deep eutectic solvent (DES) containing lactic acid was investigated. In this study, the influence of choline chloride on pulping of Eucalyptus globulus chips was determined. Pulping experiments were performed at 120 °C for 8 h with a DES to wood ratio of 20:1. Various experiments were performed to study the influence of choline chloride on lignin solubility, cleaving reactions, and mass transfer in order to gain an understanding of the observed pulping results. It was found that the chloride anion is the active component of choline chloride. In fact, the inexpensive salt NaCl performed as well as choline chloride in that respect. Furthermore, choline chloride is already effective in a 1:250 M ratio to lactic acid. Studies on milled wood lignin show that choline chloride increases the cleavage rate of β-O-4 and thereby increases the delignification rate of biomass. Furthermore, choline chloride slightly decreased the solubility of lignin in DESs and due to an increase in viscosity decreased the estimated mass transfer coefficient. Overall, the delignification rate of Eucalyptus by lactic acid increased by the addition of halide salts.
AB - The role of choline chloride in biomass delignification by a deep eutectic solvent (DES) containing lactic acid was investigated. In this study, the influence of choline chloride on pulping of Eucalyptus globulus chips was determined. Pulping experiments were performed at 120 °C for 8 h with a DES to wood ratio of 20:1. Various experiments were performed to study the influence of choline chloride on lignin solubility, cleaving reactions, and mass transfer in order to gain an understanding of the observed pulping results. It was found that the chloride anion is the active component of choline chloride. In fact, the inexpensive salt NaCl performed as well as choline chloride in that respect. Furthermore, choline chloride is already effective in a 1:250 M ratio to lactic acid. Studies on milled wood lignin show that choline chloride increases the cleavage rate of β-O-4 and thereby increases the delignification rate of biomass. Furthermore, choline chloride slightly decreased the solubility of lignin in DESs and due to an increase in viscosity decreased the estimated mass transfer coefficient. Overall, the delignification rate of Eucalyptus by lactic acid increased by the addition of halide salts.
KW - UT-Hybrid-D
UR - http://www.scopus.com/inward/record.url?scp=85072572755&partnerID=8YFLogxK
U2 - 10.1021/acs.iecr.9b03588
DO - 10.1021/acs.iecr.9b03588
M3 - Article
AN - SCOPUS:85072572755
SN - 0888-5885
VL - 58
SP - 16348
EP - 16357
JO - Industrial & engineering chemistry research
JF - Industrial & engineering chemistry research
IS - 36
ER -