title: Hydrolysis kinetics of tulip tree xylan in hot compressed water.
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 5-30min, 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.
authors.affiliation: School of Chemical and Biological Engineering, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 151-744, Republic of Korea.
authors.forename: Junho
authors.initials: J
authors.lastname: Yoon
authors.affiliation: School of Chemical and Biological Engineering, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 151-744, Republic of Korea.
authors.forename: Hun Wook
authors.initials: HW
authors.lastname: Lee
authors.affiliation: School of Chemical and Biological Engineering, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 151-744, Republic of Korea.
authors.forename: Seungjae
authors.initials: S
authors.lastname: Sim
authors.affiliation: School of Chemical and Biological Engineering, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 151-744, Republic of Korea.
authors.forename: Aye Aye
authors.initials: AA
authors.lastname: Myint
authors.affiliation: School of Chemical and Biological Engineering, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 151-744, Republic of Korea.
authors.forename: Hee Jeong
authors.initials: HJ
authors.lastname: Park
authors.affiliation: School of Chemical and Biological Engineering, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 151-744, Republic of Korea; Institute of Chemical Processes, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 151-744, Republic of Korea. Electronic address: ywlee@snu.ac.kr.
authors.forename: Youn-Woo
authors.initials: YW
authors.lastname: Lee
mesh_terms: D018533:Biomass; D019149:Bioreactors; D001709:Biotechnology / Q000295:instrumentation / Q000379:methods*; D006868:Hydrolysis; D007700:Kinetics; D031567:Liriodendron / Q000737:chemistry*; D009844:Oligosaccharides / Q000737:chemistry / Q000378:metabolism; D013696:Temperature; D014867:Water; D014990:Xylans / Q000737:chemistry* / Q000378:metabolism
chemical_list: D009844:Oligosaccharides; D014990:Xylans; D014867:Water
keywords: Hot compressed water; Kinetics; Lignocellulosic biomass; Pretreatment; Xylan