Details

Autor(en) / Beteiligte

• Kang, Xiheng
• Wang, Yun-Yan
• Wang, Shuangfei
• Song, Xueping

Titel

Xylan and xylose decomposition during hot water pre-extraction: A pH-regulated hydrolysis

Ist Teil von

• Carbohydrate polymers, 2021-03, Vol.255, p.117391-117391, Article 117391

Ort / Verlag

England: Elsevier Ltd

Erscheinungsjahr

2021

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• [Display omitted] •The hydrolysis process of xylan have been elaborated.•The hydrothermal degradation of d-xylose depended mainly on initial concentration.•Production of furfural could be effectively decrease by pH-regulation.•Production of formic acid could be effectively increase by pH-regulation.•Under alkaline conditions, d-xylose can degrade directly to formic acid. One of the key issues in the development of biofuels using lignocellulosic feedstocks is to increase the yield of fermented sugar, and simultaneously decrease the generation of fermentation inhibitors. Therefore, it is essential to understand the degradation mechanism of xylan during hot-water pretreatment. We analyzed the hydrothermal degradation products of xylan and xylose under different conditions. Results showed that furfural and formic acid formed from xylose reached a maximum value of 32.56 % and 35.14 %, respectively. By increasing the initial pH of the xylan solution, the furfural concentration can be reduced effectively to 2% and the formation of formic acid was preferred under alkaline conditions. On this basis, we proposed a new hydrothermal degradation pathway of xylan in alkaline solution. The in-depth understanding of xlyan degradation during hot water pre-treatment will be beneficial for improving the efficiency of biofuel production.