Structure-Controlled Pyrolysis of Biomass with Sodium Hydroxide for Suppression of Tar Formation

• Ohmukai Yoshikage

  Department of Chemical Engineering, Kyoto University

• Fujimoto Kosuke

  Department of Chemical Engineering, Kyoto University

• Hasegawa Isao

  Department of Chemical Engineering, Kyoto University

• Hayashi Shigeya

  Ube Industries, Ltd.

• Mae Kazuhiro

  Department of Chemical Engineering, Kyoto University

Abstract

Pyrolysis of NaOH-loaded Douglas fir and cellulose has been carried out to determine the effect of sodium hydroxide on the pyrolysis profile. A tar yield of 0 wt% and the char yield of 32 wt% were obtained at a final pyrolysis temperature of 500°C. It was revealed that the amount of hydroxyl groups in the residue significantly decreased at 200°C and that the structure of cellulose was distorted via cross-linking at the same temperature through spectroscopic analyses and diffraction patterns. The cross-linking led to the increase in char yield at 500°C. A detailed analysis showed that char yield from cellulose at 500°C correlated linearly with the degree of cross-linking calculated from the amount of dehydration at 200°C. These results showed a possibility that the pyrolysis profile of biomass may be controlled through an appropriate pretreatment to change the structure of the intermediate.

Journal

• JOURNAL OF CHEMICAL ENGINEERING OF JAPAN

  JOURNAL OF CHEMICAL ENGINEERING OF JAPAN 41 (4), 312-318, 2008

  The Society of Chemical Engineers, Japan

Keywords

• Pyrolysis
• Biomass
• Inorganic Compound
• Cross-Linking

Details

• CRID: 1390001204568393984
• NII Article ID: 10021110139
• NII Book ID: AA00709658
• DOI: 10.1252/jcej.07we262
• ISSN: 18811299
• ISSN: 00219592
• NDL BIB ID: 9463066
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I9463066
• Web Site: http://www.jstage.jst.go.jp/article/jcej/41/4/41_07we262/_pdf
• Text Lang: en
• Data Source:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
• Abstract License Flag: Disallowed