Analysis of Lignins Solubilized in Two-Stage Organosolv and Alkaline Peroxide Treatments from Haloxylon ammodendron and Elaeagnus angustifolia

Sun, Run‐Cang; Sun, Xiaofang; Lu, Qi

doi:10.1080/10236660211186

Cited by 3 publications

(1 citation statement)

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“…Indeed, delignification of lignocellulosic biomass under oxidative conditions proceeds most efficiently at alkaline pH values (pH > 9), leading to a higher production of hydroxyl radicals and low molecular weight acids. 11,30 The relatively high delignification for condition D can be explained by the high oxidation temperature (200…”

Section: Wet Oxidation Pre-treatmentmentioning

confidence: 99%

Wet oxidation pre‐treatment of woody yard waste: parameter optimization and enzymatic digestibility for ethanol production

Lissens

Klinke

Verstraete

et al. 2004

J of Chemical Tech & Biotech

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Woody yard waste with high lignin content (22% of dry matter (DM)) was subjected to wet oxidation pre-treatment for subsequent enzymatic conversion and fermentation. The effects of temperature (185-200• C), oxygen pressure (3-12 bar) and addition of sodium carbonate (0-3.3 g per 100 g DM biomass) on enzymatic cellulose and hemicellulose (xylan) convertibility were studied. The enzymatic cellulose conversion was highest after wet oxidation for 15 min at 185• C with addition of 12 bars of oxygen and 3.3 g Na 2 CO 3 per 100 g waste. At 25 FPU (filter paper unit) cellulase g −1 DM added, 58-67% and 80-83% of the cellulose and hemicellulose contained in the waste were converted into monomeric sugars. The cellulose conversion efficiency during a simultaneous saccharification and fermentation (SSF) assay at 10% DM was 79% for the highest enzyme loading (25 FPU g −1 DM) while 69% conversion efficiency was still reached at 15 FPU g −1 DM. Total carbohydrate recoveries were high (91-100% for cellulose and 72-100% for hemicellulose) and up to 49% of the original lignin and 79% of the hemicellulose could be solubilized during wet oxidation treatment and converted into carboxylic acids mainly (total carboxylic acids = 3.1-7.4% on DM basis).

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Section: Wet Oxidation Pre-treatmentmentioning

confidence: 99%