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2007 Fiscal Year Final Research Report Summary

Pyrolysis mechanisms of woody biomass at the molecular level for controlling the product selectivity

Research Project

Project/Area Number 18580163
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field 林産科学・木質工学
Research InstitutionKyoto University

Principal Investigator

KAWAMOTO Haruo  Kyoto University, Graduate School of Energy Science, Associate Professor (80224864)

Co-Investigator(Kenkyū-buntansha) SAKA Shiro  Kyoto Univeristy, Graduate School of Energy Science, Professor (50205697)
Project Period (FY) 2006 – 2007
KeywordsBiomass / Pyrolysis / Molecular mechanis / Process control / Lignin / Sustainable society / Renewable resources / Biomass energy
Research Abstract

In this research, the following results were obtained. (1) Role of lignin-substructures on pyrolytic formation of condensed, depolymerized and carbonized products from wood lignin.
Lignin is a heterogeneous polymer of phenyl propane derivatives, which are linked through various ether (C-O-C) and C-C linkages. Thus, pyrolysis mechanisms of these substructures are very important to understand the pyrolysis of lignin in wood. In this research, various dimeric model compounds were used to study the pyrolysis pathways and mechanisms of the substructures. Then, the results were discussed with the results of pyrolysis of the isolated lignin from wood (lignin polymer). Based on these results, pyrolysis behaviors of the isolated lignin (i.e., condensation, depolymerization and carbonization) were explained with the roles of the pyrolysis of the substructures. Furthermore, the ether cleavage mechanisms (homolysis vs. heterolysis), a key reaction for lignin depolymerization, were identified with v … More arious model compounds. Lignin carbonization is recognized as polyaromatization of the aromatic rings in lignin. The molecular mechanism of this carbonization was proposed for the first time in this research. All these results are essential to control the pyrolysis reactions of lignin for improving the product selectivity.
(2) Role of lignin pyrolysis in wood gasification mechanism
Wood pyrolysis is a key role even in the wood gasification, which is conducted at much higher temperature (800-1000℃) than pyrolysis. The primary pyrolysis products (volatiles and char) are further decomposed into gaseous products (secondary reactions). Thus, the primary pyrolysis is recognized as the source of the reactants to the secondary decomposition stage. Based on the results as described in the section (1), the gasification mechanism of woody biomass was approached at the molecular level. As a result, the behaviors of lignin in wood gasification and the roles of lignin pyrolysis on wood gasification were clarified. These results are very useful to control the gasification process for improving the product selectivity, i.e. tar reduction. Less

  • Research Products

    (41 results)

All 2008 2007 2006 Other

All Journal Article (20 results) (of which Peer Reviewed: 10 results) Presentation (20 results) Book (1 results)

  • [Journal Article] Role of O-CH3 group in carbonization of lignin-derived volatile components2008

    • Author(s)
      T. Hosoya, H. Kawamoto, S. Saka
    • Journal Title

      Journal of Analytical and Applied Pyrolysis (印刷中)

    • Description
      「研究成果報告書概要(和文)」より
    • Peer Reviewed
  • [Journal Article] Secondary reactions of lignin-derived primary tar components2008

    • Author(s)
      T. Hosoya, H. Kawamoto, S. Saka
    • Journal Title

      Journal of Analytical and Applied Pyrolysis (印刷中)

    • Description
      「研究成果報告書概要(和文)」より
    • Peer Reviewed
  • [Journal Article] Gasification reactivities of cenulose-and lignin-derived tar and char fractions as studied with a closed ampoule reactor2008

    • Author(s)
      T. Hosoya, H. Kawamoto, S. Saka
    • Journal Title

      Journal of Analytical and Applied Pyrolysis (印刷中)

    • Description
      「研究成果報告書概要(和文)」より
    • Peer Reviewed
  • [Journal Article] Pyrolysis behavior of milled wood lignin and model dimers at various temperatures2008

    • Author(s)
      T. Nakamura, H. Kawamoto, S. Saka
    • Journal Title

      Journal of Analytical and Applied Pyrolysis 80

      Pages: 173-182

    • Description
      「研究成果報告書概要(和文)」より
    • Peer Reviewed
  • [Journal Article] Different pyrolytic cleavage mechanisms of β-ether bond depending on the side-chain structure of lignin dimers2008

    • Author(s)
      H. Kawamoto, M. Ryoritani, S. Saka
    • Journal Title

      Journal of Analytical and Applied Pyrolysis 81

      Pages: 88-94

    • Description
      「研究成果報告書概要(和文)」より
    • Peer Reviewed
  • [Journal Article] Pyrolytic cleavage mechanis of lignin ether-linkages: A study on p-substituted dimers and trimers2008

    • Author(s)
      H. Kawamoto, T. Nakamura, S. Saka
    • Journal Title

      Holzforschung 62

      Pages: 50-56

    • Description
      「研究成果報告書概要(和文)」より
    • Peer Reviewed
  • [Journal Article] Pyrolysis behavior of milled wood lignin and model dimers at various temperatures2008

    • Author(s)
      Nakamura, T., Kawamoto, H., Saka, S
    • Journal Title

      J. Anal. Appl. Pyrolysis 80

      Pages: 173-182

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Different pyrolytic cleavage mechanisms of β-ether bond depending on the side-chain structure of lignin dimers2008

    • Author(s)
      Kawamoto, H., Ryoritani, M., Saka, S
    • Journal Title

      J. Anal. Appl. Pyrolysis 81

      Pages: 88-94

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Pyrolytic cleavage mechanism of lignin ether-linkages : A study on p-substituted dimers and trimers2008

    • Author(s)
      Kawamoto, H., Nakamura, T., Saka, S
    • Journal Title

      Holzforschung 62

      Pages: 50-56

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Role of side-chain hydroxyl groups in pyrolytic reaction of phenolic β-ether type of lignin dimer2007

    • Author(s)
      H. Kawamoto, S. Saka
    • Journal Title

      Journal of Wood Chemistry and Technology 27

      Pages: 113-120

    • Description
      「研究成果報告書概要(和文)」より
    • Peer Reviewed
  • [Journal Article] Condensation reactions of some lignin related compounds at relatively low pyrolysis temperature2007

    • Author(s)
      T. Nakamura, H. Kawamoto, S. Saka
    • Journal Title

      Journal of Wood Chemistry and Technology 27

      Pages: 121-133

    • Description
      「研究成果報告書概要(和文)」より
    • Peer Reviewed
  • [Journal Article] Effects of side-chain hydroxyl groups on pyrolytic β-ether cleavage of phenolic lignin model dimer2007

    • Author(s)
      H. Kawamoto, S. Horigoshi, S. Saka
    • Journal Title

      Journal of Wood Science 53

      Pages: 268-271

    • Description
      「研究成果報告書概要(和文)」より
    • Peer Reviewed
  • [Journal Article] Pyrolysis reactions of various lignin model dimers2007

    • Author(s)
      H. Kawamoto, S. Horigoshi, S. Saka
    • Journal Title

      Journal of Wood Science 53

      Pages: 168-174

    • Description
      「研究成果報告書概要(和文)」より
    • Peer Reviewed
  • [Journal Article] Role of side-chain hydroxyl groups in pyrolytic reaction of phenolic β-ether type of lignin dimer2007

    • Author(s)
      Kawamoto, H., Saka S
    • Journal Title

      J. Wood Chem. Technol 27

      Pages: 113-120

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Condensation reactions of some lignin related compounds at relatively low pyrolysis temperature2007

    • Author(s)
      Nakamura, T., Kawamoto, H., Saka, S
    • Journal Title

      J. Wood Chem. Technol 27

      Pages: 121-133

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Effects of side-chain hydroxyl groups on pyrolytic β-ether cleavage of phenolic lignin model dimer2007

    • Author(s)
      Kawamoto, H., Horigoshi, S., Saka S
    • Journal Title

      J. Wood Sci 53

      Pages: 268-271

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Pyrolysis reactions of various lignin model dimers2007

    • Author(s)
      Kawamoto, H., Horigoshi, S., Saka S
    • Journal Title

      J. Wood Sci 53(2)

      Pages: 168-174

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Role of O-CH_3 group in carbonization of lignin-derived volatile components

    • Author(s)
      Hosoya, T., Kawamoto, H., Saka, S
    • Journal Title

      J. Anal. Appl. Pyrolysis (in press)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Secondary reactions of lignin-derived primary tar components

    • Author(s)
      Hosoya, T., Kawamoto, H., Saka S
    • Journal Title

      J. Anal. Appl. Pyrolysis (in press)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Gasification reactivities of cellulose-and lignin-derived primary tar and char fractions as studied with a closed ampoule reactor under pyrolysis conditions

    • Author(s)
      Hosoya, T., Kawamoto, H., Saka S
    • Journal Title

      J. Anal. Appl. Pyrolysis (in press)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Presentation] リグニン由来タールの気相炭化における分子機構2008

    • Author(s)
      細谷隆史、河本晴雄、坂 志朗
    • Organizer
      第58回日本木材学会大会
    • Place of Presentation
      つくば市
    • Year and Date
      20080317-19
    • Description
      「研究成果報告書概要(和文)」より
  • [Presentation] Molecular mechanism of carbonization of lignin-derived pyrolysis vapor2008

    • Author(s)
      Hosoya, T., Kawamoto, H., Saka, S
    • Organizer
      58th Annual meeting of the Japan wood society
    • Place of Presentation
      Tsukuba, Japan
    • Year and Date
      20080317-19
    • Description
      「研究成果報告書概要(欧文)」より
  • [Presentation] リグニン熱分解物の気相における二次熱分解機構2007

    • Author(s)
      細谷隆史、河本晴雄、坂 志朗
    • Organizer
      第52回リグニン討論会
    • Place of Presentation
      宇都宮市
    • Year and Date
      20071114-15
    • Description
      「研究成果報告書概要(和文)」より
  • [Presentation] リグニンβ-エーテル構造の熱分解ラジカル連鎖開裂反応2007

    • Author(s)
      渡辺敏弘、河本晴雄、坂 志朗
    • Organizer
      第52回リグニン討論会
    • Place of Presentation
      宇都宮市
    • Year and Date
      20071114-15
    • Description
      「研究成果報告書概要(和文)」より
  • [Presentation] Secondary reactions of lignin-derived pyrolysis vapor2007

    • Author(s)
      Hosoya, T., Kawamoto, H., Saka, S
    • Organizer
      52th lignin symposium
    • Place of Presentation
      Utsunomiya, Japan
    • Year and Date
      20071114-15
    • Description
      「研究成果報告書概要(欧文)」より
  • [Presentation] Radical chain reactions in pyrolytic cleavage of β-ether-type lignin model dimers2007

    • Author(s)
      Watanabe, T., Kawamoto, H., Saka, S
    • Organizer
      52th lignin symposium
    • Place of Presentation
      Utsunomiya, Japan
    • Year and Date
      20071114-15
    • Description
      「研究成果報告書概要(欧文)」より
  • [Presentation] フェノール性β-エーテル型リグニン2量体モデル化合物の熱分解に及ぼす側鎖水酸基メチル化の影響2007

    • Author(s)
      河本晴雄、坂 志朗
    • Organizer
      第57回日本木材学会大会
    • Place of Presentation
      広島市
    • Year and Date
      20070808-10
    • Description
      「研究成果報告書概要(和文)」より
  • [Presentation] Influence of methylation of side-chain hydroxyl groups on pyrolytic reactions of phenolic β-ether type lignin model dimers2007

    • Author(s)
      Kawamoto, H., Saka, S
    • Organizer
      57th Annual meeting of the Japan wood society
    • Place of Presentation
      Hiroshima, Japan
    • Year and Date
      20070808-10
    • Description
      「研究成果報告書概要(欧文)」より
  • [Presentation] タールの2次分解におけるセルロースとリグニンの相違2007

    • Author(s)
      細谷隆史、河本晴雄、坂 志朗
    • Organizer
      第16回日本エネルギー学会大会
    • Place of Presentation
      福岡市
    • Year and Date
      20070802-03
    • Description
      「研究成果報告書概要(和文)」より
  • [Presentation] Different secondary decomposition behaviors of cellulose-and lignin derived primary tar fractions2007

    • Author(s)
      Hosoya, T., Kawamoto, H., Saka, S
    • Organizer
      16th Annual meeting of the Japan energy society
    • Place of Presentation
      Fukuoka, Japan
    • Year and Date
      20070802-03
    • Description
      「研究成果報告書概要(欧文)」より
  • [Presentation] Wood pyrolysis mechanism on molecular basis for selective conversioOninto liquid fuels2006

    • Author(s)
      H. Kawamoto, S. Saka
    • Organizer
      Sustainable Energy and Environment 2006
    • Place of Presentation
      タイ、バンコク
    • Year and Date
      20061121-23
    • Description
      「研究成果報告書概要(和文)」より
  • [Presentation] Wood Pyrolysis Mechanism on Molecular Basis for Selective Conversion into Liquid Fuels2006

    • Author(s)
      Kawamoto, H., Saka, S
    • Organizer
      Sustainable Energy and Environment 2006
    • Place of Presentation
      Bangkok, Thailand
    • Year and Date
      20061121-23
    • Description
      「研究成果報告書概要(欧文)」より
  • [Presentation] フェノール性リグニンβ-エーテル型2量体モデル化合物の熱分解機構に及ぼすCγ-水酸基の影響2006

    • Author(s)
      河本晴雄、料理谷 正和、坂 志朗
    • Organizer
      第51回リグニン討論会
    • Place of Presentation
      札幌市
    • Year and Date
      20061026-27
    • Description
      「研究成果報告書概要(和文)」より
  • [Presentation] Influence of Cγ-hydroxyl group on pyrolytic cleavage mechyanism of phenolic β-ether type lignin model dimer2006

    • Author(s)
      Kawamoto, H., Ryoritani, M., Saka, S
    • Organizer
      51th lignin symposium
    • Place of Presentation
      Sapporo, Japan
    • Year and Date
      20061026-27
    • Description
      「研究成果報告書概要(欧文)」より
  • [Presentation] Pyrolysis mechanism of lignin in thermochemical conversion of woody biomass2006

    • Author(s)
      H. Kawamoto, S. Saka
    • Organizer
      Renewable Energy 2006
    • Place of Presentation
      千葉市
    • Year and Date
      20061009-13
    • Description
      「研究成果報告書概要(和文)」より
  • [Presentation] Pyrolysis mechanism of lignin in thermochemical conversion of woody biomass2006

    • Author(s)
      Kawamoto, H., Saka S
    • Organizer
      Renewable Energy 2006
    • Place of Presentation
      Chiba, Japan
    • Year and Date
      20061009-13
    • Description
      「研究成果報告書概要(欧文)」より
  • [Presentation] モデル化合物および単離リグニンの熱分解挙動より示唆される木材リグニンエーテル構造の熱分解開裂機構2006

    • Author(s)
      河本晴雄、料理谷 正和、坂 志朗
    • Organizer
      第15回日本エネルギー学会大会
    • Place of Presentation
      東京都
    • Year and Date
      20060803-04
    • Description
      「研究成果報告書概要(和文)」より
  • [Presentation] Pyrolytic cleavage mechanisms as indicated from the studies of model compounds and isolated lignin2006

    • Author(s)
      Kawamoto, H., Ryoritani, M., Saka, S
    • Organizer
      l5th Annual meeting of Japan energy society
    • Place of Presentation
      Tokyo, Japan
    • Year and Date
      20060803-04
    • Description
      「研究成果報告書概要(欧文)」より
  • [Presentation] Depolymerization mechanism of lignin in wood pyrolysis2006

    • Author(s)
      H. Kawamoto, T. Nakamura, S. Saka
    • Organizer
      The 17th International Symposium on Analytical and Applied Pyrolysis(Pyrolysis 2006)
    • Place of Presentation
      ハンガリー、ブタペスト
    • Year and Date
      20060521-26
    • Description
      「研究成果報告書概要(和文)」より
  • [Presentation] Depolymerization mechanism of lignin in wood pyrolysis2006

    • Author(s)
      Kawamoto, H., Nakamura, T., Saka, S
    • Organizer
      The 17th International Symposium on Analytical and Applied Pyrolysis (Pyrolysis 2006)
    • Place of Presentation
      Budapest, Hungary
    • Year and Date
      20060521-26
    • Description
      「研究成果報告書概要(欧文)」より
  • [Book] バイオマスの熱分解ガス化プロセス-原材料・原理・特性、ガス化炉-In「バイオマスからの気体燃料製造とそのエネルギー利用」(分担執筆)2007

    • Author(s)
      河本晴雄
    • Total Pages
      10
    • Publisher
      エヌ・ティ・エス
    • Description
      「研究成果報告書概要(和文)」より

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Published: 2010-02-04  

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