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Impact of Hot-Water Extraction on Acetone-Water Oxygen Delignification of Paulownia Spp. and Lignin Recovery

Author

Listed:
  • Chen Gong

    (Department of Paper and Bioprocess Engineering, College of Environmental Science and Forestry, State University of New York, Syracuse, NY 13210, USA)

  • Biljana M. Bujanovic

    (Department of Paper and Bioprocess Engineering, College of Environmental Science and Forestry, State University of New York, Syracuse, NY 13210, USA)

Abstract

A hardwood-based biorefinery process starting with hot-water extraction (HWE) is recommended in order to remove most of the hemicelluloses/xylans before further processing. HWE may be followed by delignification in acetone/water in the presence of oxygen (AWO) for the production of cellulose and lignin. In this study, the HWE-AWO sequence was evaluated for its effectiveness at removing lignin from the fast-growing species Paulownia tomentosa (PT) and Paulownia elongata (PE), in comparison with the reference species, sugar maple ( Acer saccharum , SM). HWE might lead to a remarkable increase in lignin accessibility, and as a result, a greater AWO delignification degree was observed for extracted PT, PE, and SM than for unextracted ones. Organosolv lignin was recovered from the spent liquor of AWO delignification of PT with/without prior HWE and characterized to evaluate the benefits of HWE on the lignin structure and purity. The lignin recovered from the spent liquor of HWE-AWO sequence is of higher purity and lighter color than that recovered from the AWO spent liquor. These properties along with low sulfur content are desirable for lignin high-value applications.

Suggested Citation

  • Chen Gong & Biljana M. Bujanovic, 2014. "Impact of Hot-Water Extraction on Acetone-Water Oxygen Delignification of Paulownia Spp. and Lignin Recovery," Energies, MDPI, vol. 7(2), pages 1-17, February.
    • Handle: RePEc:gam:jeners:v:7:y:2014:i:2:p:857-873:d:33073
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    References listed on IDEAS

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    1. Mangesh J. Goundalkar & Derek B. Corbett & Biljana M. Bujanovic, 2014. "Comparative Analysis of Milled Wood Lignins (MWLs) Isolated from Sugar Maple (SM) and Hot-Water Extracted Sugar Maple (ESM)," Energies, MDPI, vol. 7(3), pages 1-13, March.
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    Cited by:

    1. Kuo-Ting Wang & Chengyan Jing & Christopher Wood & Aditi Nagardeolekar & Neil Kohan & Prajakta Dongre & Thomas E. Amidon & Biljana M. Bujanovic, 2017. "Toward Complete Utilization of Miscanthus in a Hot-Water Extraction-Based Biorefinery," Energies, MDPI, vol. 11(1), pages 1-22, December.
    2. Mariana Abreu & Luís Silva & Belina Ribeiro & Alice Ferreira & Luís Alves & Susana M. Paixão & Luísa Gouveia & Patrícia Moura & Florbela Carvalheiro & Luís C. Duarte & Ana Luisa Fernando & Alberto Rei, 2022. "Low Indirect Land Use Change (ILUC) Energy Crops to Bioenergy and Biofuels—A Review," Energies, MDPI, vol. 15(12), pages 1-68, June.
    3. Derek B. Corbett & Neil Kohan & Grazielle Machado & Chengyan Jing & Aditi Nagardeolekar & Biljana M. Bujanovic, 2015. "Chemical Composition of Apricot Pit Shells and Effect of Hot-Water Extraction," Energies, MDPI, vol. 8(9), pages 1-15, September.

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