Catalytic hydrothermal liquefaction of biomass with K2CO3 for production of gasification feedstockShow others and affiliations
2021 (English)In: Biofuels, ISSN 1759-7269, E-ISSN 1759-7277, Vol. 12, no 2, p. 149-160Article in journal (Refereed) Published
Abstract [en]
The introduction of alkali catalyst during hydrothermal liquefaction (HTL) improves conversion and allows the aqueous liquid product to be used as gasification feedstock. This study investigates the effect of reaction temperature (240–300°C), sawdust mass fraction (9.1–25%) and reaction time (0–60 min) during K2CO3-catalytic HTL of pine sawdust. The highest biomass conversion (75.2% carbon conversion and 83.0% mass conversion) was achieved at a reaction temperature of 270°C, 9.1% sawdust mass fraction and 30 min reaction time; meanwhile, the maximum aqueous product (AP) yield (69.0% carbon yield and 73.5% mass yield) was found at a reaction temperature of 300°C, 9.1% sawdust mass fraction and 60 min reaction time. Based on the main experimental results, models for carbon and mass yields of the products were developed according to face-centered central composite design using response surface methodology. Biomass conversion and product yields had a positive correlation with reaction temperature and reaction time, while they had an inverse correlation with sawdust mass fraction. Further investigation of the effects of biomass/water and biomass/K2CO3 ratios revealed that both high water loading and high K2CO3 loading enhanced conversion and AP yield.
Place, publisher, year, edition, pages
Taylor and Francis Ltd. , 2021. Vol. 12, no 2, p. 149-160
Keywords [en]
Hydrothermal liquefaction, K2CO3, pine sawdust, response surface methodology, Bioconversion, Carbon, Feedstocks, Gasification, Inverse problems, Liquefaction, Potash, Product design, Surface properties, Central composite designs, Hydrothermal liquefactions, Inverse correlation, Positive correlations, Reaction temperature, Biomass
National Category
Natural Sciences
Identifiers
URN: urn:nbn:se:ri:diva-52470DOI: 10.1080/17597269.2018.1461521Scopus ID: 2-s2.0-85046412235OAI: oai:DiVA.org:ri-52470DiVA, id: diva2:1529356
Note
Funding details: Swedish Foundation for International Cooperation in Research and Higher Education, STINT; Funding details: Japan Society for the Promotion of Science, KAKEN; Funding details: Swedish Foundation for International Cooperation in Research and Higher Education, STINT, JA2014-5724; Funding text 1: This work was supported by the Japan Society for the Promotion of Science (JSPS) and the Swedish Foundation for International Cooperation in Research and Higher Education (STINT) through the Japan–Sweden Research Collaboration Program. Flabianus Hardi thanks the Ministry of Education, Culture, Sports, Science and Technology (MEXT) of Japan for a Japanese government scholarship. The contributions of (1) Gustav Haggstro€m from the Lulea University of Technology for support during the commissioning of the batch reactor; (2) Dr. Akiko Nakagawa-Izumi from the University of Tsukuba and Dai Xin from the Tokyo Institute of Technology, for lignocellulosic analysis; and (3) Prof. Hirofumi Hinode from the Tokyo Institute of Technology, for ICP-AES analysis support, are deeply appreciated.; Funding text 2: This work was supported by the Japan Society for the Promotion of Science (JSPS); Swedish Foundation for International Cooperation in Research and Higher Education (STINT, grant number JA2014-5724); Ministry of Education, Culture, Sports, Science and Technology (MEXT) of Japan.
2021-02-182021-02-182023-05-16Bibliographically approved