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2009 Fiscal Year Final Research Report

Analysis of reaction mechanism and kinetics of biomass in pyrolysis and gasification

Research Project

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Project/Area Number 20760520
Research Category

Grant-in-Aid for Young Scientists (B)

Allocation TypeSingle-year Grants
Research Field Reaction engineering/Process system
Research InstitutionThe University of Tokyo

Principal Investigator

FUSHIMI Chihiro  The University of Tokyo, 生産技術研究所, 助教 (50451886)

Project Period (FY) 2008 – 2009
Keywordsバイオマス / 再生可能エネルギー / 水素 / 化学工学 / エネルギー全般
Research Abstract

Biomass gasification is a promising technology because of the high thermal efficiency. However, a large amount of condensable organic compounds (tar) which causes blockages and corrosion of pipes are evolved in biomass gasification.
In this study, the inhibition of the gasification rate of biomass char by H_2 and tar was investigated. At first, the reaction rate of char in steam gasification was measured using a thermobalance reactor by varying partial pressure of H_2 (P_<H2>=0, 3, 10, 25kPa). The rate of steam gasification was decelerated by the presence of H_2 and the inhibition was significant when the partial pressure of H_2 was high (P_<H2>=25kPa). It was found that reverse oxygen exchange occurred at first period and dissociative adsorption of H_2 on char occurred at second period. The effect of levoglucosan, which is major component of pyrolysis product from cellulose, on the reaction rate of char was also measured with a newly developed drop-tube/fixed bed thermobalance reactor. It was found that not only H_2 but also other hydrocarbons evolved by pyrolysis of levoglucosan substantially inhibit char gasification when the feed rate of levoglucosan was high (250mg/min).
In addition, the effects of alkali and alkaline earth metals (AAEM), which can act as an excellent catalyst for the gasification and combustion reactions, on the interactions between the three major components of biomass (cellulose, xylan and lignin) were investigated. It is found that AAEM decreased the generation of water-soluble tar derived from cellulose. AAEM do not have significant influence on the interaction between cellulose and xylan.

  • Research Products

    (6 results)

All 2009 2008 Other

All Journal Article (2 results) (of which Peer Reviewed: 2 results) Presentation (4 results)

  • [Journal Article] Elucidation of Interaction among Cellulose, Lignin and Xylan during Tar and Gas Evolution in Steam Gasification2009

    • Author(s)
      Chihiro Fushimi, Shingo Katayama, Atsushi Tsutsumi
    • Journal Title

      J. Analytical and Applied Pyrolysis vol.86

      Pages: 82-89

    • Peer Reviewed
  • [Journal Article] Inhibition of Steam Gasification of Biomass Char by Hydrogen and Tar

    • Author(s)
      Chihiro Fushimi, Tomoko Wada, Atsushi Tsutsumi
    • Journal Title

      Biomass and Bioenergy (改訂原稿投稿中)

    • Peer Reviewed
  • [Presentation] Effects of Volatile-Char Interaction on the Char Reactivity In the Biomass Gasification2009

    • Author(s)
      Tomoko Wada, Chihiro Fushimi, Atsushi Tsutsumi
    • Organizer
      2008 Annual Meeting of American Institute of Chemical Engineers (AIChE)
    • Place of Presentation
      Philadelphia, PA, USA
    • Year and Date
      20091116-20091121
  • [Presentation] Effects of Hydrogen and Levoglucosan on the Char Reactivity in the Biomass Gasification2009

    • Author(s)
      C. Fushimi, T. Wada, A. Tsutsumi
    • Organizer
      International Conference on Polygeneration Strategies 2009 (ICPS09)
    • Place of Presentation
      Vienna, Austria
    • Year and Date
      20090901-20090904
  • [Presentation] Interactive Effect of Char and Volatiles on the Char Reactivity in the Biomass Gasification2009

    • Author(s)
      Tomoko Wada, Chihiro Fushimi, Atsushi Tsutsumi
    • Organizer
      World Congress on Chemical Engineering 2009
    • Place of Presentation
      Montreal, Canada
    • Year and Date
      20090823-20090827
  • [Presentation] バイオマス水蒸気ガス化における揮発物質がチャーの反応性に及ぼす影響2008

    • Author(s)
      和田朋子・伏見千尋・堤敦司
    • Organizer
      第40回化学工学会秋季大会
    • Place of Presentation
      仙台
    • Year and Date
      20080924-20080926

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Published: 2011-06-18   Modified: 2016-04-21  

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