TY - JOUR
T1 - Intensification of Hydrothermal Biomass Fractionation with the Help of Oxygen
T2 - Kinetics and Modeling
AU - Rissanen, Jussi Väinönpoika
AU - Lagerquist, Lucas
AU - Hemming, Jarl
AU - Eränen, Kari
AU - Eklund, Patrik
AU - Grénman, Henrik
N1 - Funding Information:
Financial support for the research was received from the Academy of Finland (Grant number: 310652), which is gratefully acknowledged.
Publisher Copyright:
© 2022 American Chemical Society. All rights reserved.
PY - 2022/9/26
Y1 - 2022/9/26
N2 - The aim of this study was to examine the influence of the oxygen atmosphere on hydrothermal fractionation of Norway spruce at 130-160 °C and 1-50 bar. The quantitative kinetics and qualitative aspects of the hemicellulose extraction were studied. The results show that the fractionation can be considerably enhanced already by low concentrations of oxygen. The ratio of lignin to hemicellulose extracted from the wood did not significantly vary with the gas atmosphere. A mathematical model was successfully developed for the extraction kinetics revealing an activation energy of 114 kJ/mol and 1/5 reaction order for the hydronium ion concentration and 1/7 reaction order for oxygen concentration. The method is easily applicable also to existing equipment and is nontoxic for obtaining extracts for use also in, for example, the alimentary and cosmetics industries, without the need for costly separation steps. Moreover, the process intensification results in increased energy, space, and time efficiency.
AB - The aim of this study was to examine the influence of the oxygen atmosphere on hydrothermal fractionation of Norway spruce at 130-160 °C and 1-50 bar. The quantitative kinetics and qualitative aspects of the hemicellulose extraction were studied. The results show that the fractionation can be considerably enhanced already by low concentrations of oxygen. The ratio of lignin to hemicellulose extracted from the wood did not significantly vary with the gas atmosphere. A mathematical model was successfully developed for the extraction kinetics revealing an activation energy of 114 kJ/mol and 1/5 reaction order for the hydronium ion concentration and 1/7 reaction order for oxygen concentration. The method is easily applicable also to existing equipment and is nontoxic for obtaining extracts for use also in, for example, the alimentary and cosmetics industries, without the need for costly separation steps. Moreover, the process intensification results in increased energy, space, and time efficiency.
KW - green engineering
KW - hemicellulose extraction
KW - hydrothermal processing
KW - mathematical modeling
KW - quantitative kinetics
UR - http://www.scopus.com/inward/record.url?scp=85138770111&partnerID=8YFLogxK
U2 - 10.1021/acssuschemeng.2c03869
DO - 10.1021/acssuschemeng.2c03869
M3 - Article
AN - SCOPUS:85138770111
SN - 2168-0485
VL - 10
SP - 12808
EP - 12816
JO - ACS Sustainable Chemistry and Engineering
JF - ACS Sustainable Chemistry and Engineering
IS - 38
ER -