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Effect of ozonation on the reactivity of lignocellulose substrates in enzymatic hydrolyses to sugars

  • Chemical Kinetics and Catalysis
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Abstract

The efficiency of pre-treatment of aspen wood with ozone for subsequent enzymatic hydrolysis into sugars is determined by the amount of absorbed ozone. The ozone absorption rate depended on the water content in the sample being ozonized and was maximum at a relative humidity of wood of ∼40%. As a result of ozone pre-treatment, the initial rate of the enzymatic hydrolysis of wood under the action of a cellulase complex increased eightfold, and the maximum yield of sugars increased tenfold depending on the ozone dose. The ozonation at ozone doses of more than 3 mol/PPU (phenylpropane structural unit of lignin) led to a decrease in the yield of sugars because of the oxidative destruction of cellulose and hemicellulose. The alkaline ozonation in 2 and 12% NaOH was inefficient because of the accompanying oxidation of carbohydrates and considerably decreased the yield of sugars.

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Correspondence to E. M. Ben’ko.

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Original Russian Text © E.M. Ben’ko, O.R. Manisova, V.V. Lunin, 2013, published in Zhurnal Fizicheskoi Khimii, 2013, Vol. 87, No. 7, pp. 1131–1137.

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Ben’ko, E.M., Manisova, O.R. & Lunin, V.V. Effect of ozonation on the reactivity of lignocellulose substrates in enzymatic hydrolyses to sugars. Russ. J. Phys. Chem. 87, 1108–1113 (2013). https://doi.org/10.1134/S0036024413070091

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  • DOI: https://doi.org/10.1134/S0036024413070091

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