Jump to main content
Jump to site search


Universal kinetic solvent effects in acid-catalyzed reactions of biomass-derived oxygenates

Author affiliations

Abstract

The rates of Brønsted-acid-catalyzed reactions of ethyl tert-butyl ether, tert-butanol, levoglucosan, 1,2-propanediol, fructose, cellobiose, and xylitol were measured in solvent mixtures of water with three polar aprotic cosolvents: γ-valerolactone; 1,4-dioxane; and tetrahydrofuran. As the water content of the solvent environment decreases, reactants with more hydroxyl groups have higher catalytic turnover rates for both hydrolysis and dehydration reactions. We present classical molecular dynamics simulations to explain these solvent effects in terms of three simulation-derived observables: (1) the extent of water enrichment in the local solvent domain of the reactant; (2) the average hydrogen bonding lifetime between water molecules and the reactant; and (3) the fraction of the reactant accessible surface area occupied by hydroxyl groups, all as a function of solvent composition. We develop a model, constituted by linear combinations of these three observables, that predicts experimentally determined rate constants as a function of solvent composition for the entire set of acid-catalyzed reactions.

Graphical abstract: Universal kinetic solvent effects in acid-catalyzed reactions of biomass-derived oxygenates

Back to tab navigation

Supplementary files

Publication details

The article was received on 02 Dec 2017, accepted on 08 Feb 2018 and first published on 08 Feb 2018


Article type: Paper
DOI: 10.1039/C7EE03432F
Citation: Energy Environ. Sci., 2018, Advance Article
  •   Request permissions

    Universal kinetic solvent effects in acid-catalyzed reactions of biomass-derived oxygenates

    T. W. Walker, A. K. Chew, H. Li, B. Demir, Z. C. Zhang, G. W. Huber, R. C. Van Lehn and J. A. Dumesic, Energy Environ. Sci., 2018, Advance Article , DOI: 10.1039/C7EE03432F

Search articles by author

Spotlight

Advertisements