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ZERO FORMATION OF DIOXINS AND SUPPRESSION OF DE NOVE SYNTHESIS

Research Project

Project/Area Number 14205110
Research Category

Grant-in-Aid for Scientific Research (A)

Allocation TypeSingle-year Grants
Section一般
Research Field Metal making engineering
Research InstitutionOSAKA UNIVERSITY

Principal Investigator

USUI Tateo  OSAKA UNIVERSITY, GRADUATE SCHOOL OF ENGINEERING, PROFESSOR, 大学院・工学研究科, 教授 (90029348)

Co-Investigator(Kenkyū-buntansha) ONO-NAKAZATO Hideki  OSAKA UNIVERSITY, GRADUATE SCHOOL OF ENGINEERING, ASSOCIATE PROFESSOR, 大学院・工学研究科, 講師 (30283716)
TANAKA Tishihiro  OSAKA UNIVERSITY, GRADUATE SCHOOL OF ENGINEERING, PROFESSOR, 大学院・工学研究科, 教授 (10179773)
HARA Shigeta  OSAKA UNIVERSITY, GRADUATE SCHOOL OF ENGINEERING, PROFESSOR, 大学院・工学研究科, 教授 (90029116)
Project Period (FY) 2002 – 2003
Project Status Completed (Fiscal Year 2003)
Budget Amount *help
¥40,040,000 (Direct Cost: ¥30,800,000、Indirect Cost: ¥9,240,000)
Fiscal Year 2003: ¥17,810,000 (Direct Cost: ¥13,700,000、Indirect Cost: ¥4,110,000)
Fiscal Year 2002: ¥22,230,000 (Direct Cost: ¥17,100,000、Indirect Cost: ¥5,130,000)
KeywordsCaO chips / dechlorination / dioxins / furans (Dioxins) / Electromagnetic wave / fly carbonaceous matters / high CO / CO_2 ratio / zero formation of Dioxins / 濃度・温度境界層の消散 / PVC燃焼 / 非平衡領域 / COリッチ濃度境界層 / 強制混合による濃度境界層の消散 / CaO粒子充填層 / 充填層
Research Abstract

From our fundamental studies on combustion experiments and thermodynamic evaluations, it is clarified that dioxins/furans (Dioxins) are mainly formed at the thermodynamically heterogeneous site with high CO/CO_2 ratio, which is the boundary layer on the surface of the fly carbonaceous (C^*) matters remaining in combustion gas. Therefore, it is considered that Dioxins are hardly formed by the decomposition or the disappearance of the fly C^* matters and by the dechlorination from the fly C^* matters. The present study has investigated whether zero formation of Dioxins was achieved or not by the dechlorination from the fly C^* matters with CaO, and by the dispersion of the boundary layer with high CO/CO_2 ratio around the fly C^* matters through an irradiation of electromagnetic wave with high energy density to combustion gas.
Electromagnetic wave was irradiated to an exhaust gas of PVC combustion, in which Dioxins concentration was 85 ng-TEQ/m^3 (s.t.p.). The irradiation conditions were the power of 1.8 kW, the frequency of 915 MHz, the irradiation time of 6 s, and the temperature of 423 K. Dioxins concentration after the irradiation of electromagnetic wave decreased to be 2.4 ng-TEQ/m3 (s.t.p.), the decomposition rate of about 97 %. It is regarded that a lot of Dioxins is decomposed by the dispersion of the boundary layer around the fly C^* matters, where Dioxins are formed, and by the decomposition or the burning out of the fly C^* matters with heating up. Decomposition rate of Dioxins are expected to improve more at higher temperature zone.
By setting CaO chips bed in the high temperature zone, Dioxins extremely decreased from 1 ng-TEQ/m^3 (s.t.p.) to 0.007 ng-TEQ/m^3 (s.t.p.) because chlorine in and around the fly C* matters was dechlorinated to thermodynamically stable CaCl2. The dechlorination at the high temperature zone is very effective for zero formation of Dioxins.

Report

(3 results)
  • 2003 Annual Research Report   Final Research Report Summary
  • 2002 Annual Research Report
  • Research Products

    (10 results)

All Other

All Publications (10 results)

  • [Publications] 川端 弘俊, 丸川 雄浄, 碓井 建夫, 原 茂太, 田中 敏宏, 中里 英樹: "Fe・Cu・プラスチック系混合スクラップの高温処理過程におけるダイオキシン類ゼロ生成"9th Symposium on "Microjoining and Assembly Technology in Electronics". Vol.9. 377-382 (2003)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] Hirotoshi KAWABATA, Tateo USUI, Hideki ONO-NAKAZATO, Masayuki TANABE, Katsukiyo MARUKAWA, Shigeta HARA, Toshihiro TANAKA: "Experimental Studies on the Factors Influencing the Formation of Dioxins in the Combustion Process"The Japan/Korea International Symposium on Resources Recycling and Material Sciences. 4-5 Sep.. 137-142 (2003)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] Hirotoshi KAWABATA, Tateo USUI, Hideki ONO-NAKAZATO, Masayuki TANABE, Katsukiyo MARUKAWA, Shigeta HARA, Toshihiro TANAKA: "Influence of Chlorine Forms and Dechlorination on Dioxins Formation/Suppression in the Combustion Processes"RESOURCES PROCESSING. Vol.51. 56-60 (2004)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] Hirotoshi KAWABATA, Katsukiyo MARUKAWA, Tateo USUI, Shigeta HARA, Toshihiro TANAKA, Hideki ONO-NAKAZATO: "Non-formation of Dioxins on High Temperature Processing with Scraps of Fe, Cu and Plastics Mixtures"9th Symposium on "Microjoining and Assembly Technology in Electronics" (JWS). Vol.9. 377-382 (2003)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] Hirotoshi KAWABATA, Tateo USUI, Hideki ONO-NAKAZATO, Masayuki TANABE, Katsukiyo MARUKAWA, Shigeta HARA, Toshihiro TANAKA: "Experimental Studies on the Factors Influencing the Formation of Dioxins in the Combustion Process"The Japan/Korea International Symposium on Resources Recycling and Material Sciences (Kansai University). 4-5 Sep.. 137-142 (2003)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] Hirotoshi KAWABATA, Tateo USUI, Hideki ONO-NAKAZATO, Masayuki TANABE, Katsukiyo MARUKAWA, Shigeta HARA, Toshihiro TANAKA: "Influence of Chlorine Forms and Dechlorination on Dioxins Formation/Suppression in the Combustion Processes"Resources Processing (RESOURCES PROCESSING). Vol.51, No.1. 56-60 (2004)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] 川端 弘俊, 丸川 雄浄, 碓井 建夫, 原 茂太, 田中 敏宏, 中里 英樹: "Fe・Cu・プラスチック系混合スクラップの高温処理過程におけるダイオキシン類ゼロ生成"9th Symposium on "Microjoining and Assembly Technology in Electronics". Vol.9. 377-382 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] Hirotoshi KAWABATA, Tateo USUI, Hideki ONO-NAKAZATO, Masayuki TANABE, Katsukiyo MARUKAWA, Shigeta HARA, Toshihiro TANAKA: "Experimental Studies on the Factors Influencing the Formation of Dioxins in the Combustion Process"The Japan/Korea International Symposium on Resources Recycling and Material Sciences. 4-5 Sep.. 137-142 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] Hirotoshi KAWABATA, Tateo USUI, Hideki ONO-NAKAZATO, Masayuki TANABE, Katsukiyo MARUKAWA, Shigeta HARA, Toshihiro TANAKA: "Influence of Chlorine Forms and Dechlorination on Dioxins Formation/Suppression in the Combustion Processes"RESOURCES PROCESSING. Vol.51-1. 1-5 (2004)

    • Related Report
      2003 Annual Research Report
  • [Publications] 川端 弘俊, 丸川 雄浄, 碓井 建夫, 原 茂太, 田中 敏宏, 中里 英樹: "Fe・Cu・プラスチック系混合スクラップの高温処理過程におけるダイオキシン類ゼロ生成"9th Symposium on "Microjoining and Assembly Technology in Electronics". Vol.9. 377-382 (2003)

    • Related Report
      2002 Annual Research Report

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Published: 2002-04-01   Modified: 2016-04-21  

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