Affinity characteristics of neutral and anion exchange polymer resin adsorbents for main components in a simulated biomass hydrolysate

摘要

Batch adsorption equilibrium experiments were carried out to find the polymer resin adsorbents suitable for fractionation of constituents in a simulated biomass hydrolysate during sugar purification. Considering affinity characteristics of ten neutral and anion exchange polymer resins for its constituents, the polymer resins could be classified as four types of adsorbents. Among type A neutral resin adsorbents, XAD-16 adsorbed the two aromatic aldehydes, furfural and vanillin, most preferentially thanks to pi-pi interaction between the aromatic compounds and styrene-divinylbenzene matrix of the resin, and strong hydrophobic interaction between aldehyde functionality and the nonpolar matrix. Among type B neutral resin adsorbents, L-493 adsorbed furans and phenolic compounds most preferentially because it had not only styrene-divinylbenzene matrix but also hydrophilic surface interacting with hydroxyl groups of phenolic compounds. IRA67 was the best anion exchange resin adsorbent for selective adsorption of acids because of its weaker pi-pi interaction than the other anion exchange resins as well as its very high anion exchange ability. A new overall sugar purification process of six adsorption steps was proposed based on these adsorption results, and most components in the simulated biomass hydrolysate could be fractionated with high selectivities in the process. (C) 2020 The Korean Society of Industrial and Engineering Chemistry. Published by Elsevier B.V. All rights reserved.