Hydrolysis kinetics of tulip tree xylan in hot compressed water. (August 2016)

• Record Type: Journal Article
• Authors: Yoon, Junho; Lee, Hun Wook; Sim, Seungjae; Myint, Aye Aye; Park, Hee Jeong; Lee, Youn-Woo
• Is Part Of: Bioresource technology. Volume 214(2016)
• Page Start: 679
• Page End: 685
• Publication Date: 2016-08
• Subjects: Hot compressed water -- Pretreatment -- Lignocellulosic biomass -- Kinetics -- Xylan; Biomass -- Periodicals; Biomass energy -- Periodicals; Bioremediation -- Periodicals; Agricultural wastes -- Periodicals; Factory and trade waste -- Periodicals; Organic wastes -- Periodicals; Bioénergie -- Périodiques; Déchets agricoles -- Périodiques; Déchets industriels -- Périodiques; Déchets organiques -- Périodiques; Déchets (Combustible) -- Périodiques; 662.88
• DOI: 10.1016/j.biortech.2016.05.019
• Languages: English
• ISSNs: 0960-8524

Abstract

Highlights: A kinetic study on hot compressed water pretreatment of tulip tree. Application of kinetic results to three different reaction systems. Semi-continuous reaction systems are recommended for high yield and conversion. High conversion and high yield can be achieved at low temperature and short space time in semi-continuous reaction systems. Abstract: Lignocellulosic biomass, a promising renewable resource, can be converted into numerous valuable chemicals post enzymatic saccharification. However, the efficacy of enzymatic saccharification of lignocellulosic biomass is low; therefore, pretreatment is necessary to improve the efficiency. Here, a kinetic analysis was carried out on xylan hydrolysis, after hot compressed water pretreatment of the lignocellulosic biomass conducted at 180–220 °C for 5–30 min, and on subsequent xylooligosaccharide hydrolysis. The weight ratio of fast-reacting xylan to slow-reacting xylan was 5.25 in tulip tree. Our kinetic results were applied to three different reaction systems to improve the pretreatment efficiency. We found that semi-continuous reactor is promising. Lower reaction temperatures and shorter space times in semi-continuous reactor are recommended for improving xylan conversion and xylooligosaccharide yield. In the theoretical calculation, 95% of xylooligosaccharide yield and xylan conversion were achieved simultaneously with high selectivity (desired product/undesired product) of 100 or more.