2000 Fiscal Year Final Research Report Summary
Kinetic study for the production mechanism of Dibenzo-p-dioxin
| Project/Area Number |
11650795
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
反応・分離工学
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| Research Institution | Nagaoka University of Technology |
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Principal Investigator |
FUJII Nabuyuki Nagaoka University of Technology, Department of Chemistry, Professor, 工学部, 教授 (50011119)
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| Co-Investigator(Kenkyū-buntansha) |
MURAKAMI Yoshinori Nagaoka University of Technology, Department of Chemistry, Research Associate., 工学部, 助手 (70293256)
KOBAYASHI Takaomi Nagaoka University of Technology, Department of Chemistry, Associate Professor., 工学部, 助教授 (90225516)
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| Project Period (FY) |
1999 – 2000
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| Keywords | DIBENZO-p-DIOXIN / PRODUCTION / MECHANISM / KINETICS / PHENOXY-RADICAL / DEHYDROGENATION / DYMERIZATION / CYCLOPPENTADIENYL-RADICAL / CARBON MONOXIDE |
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| Research Abstract |
In order to confirm that the dibenzo-p-dioxin production channel in combustion is (1) c-C_5H_5+CO→C_6H_50 and (2) 2C_6H_50→C_6H_4O_2C_6H_4+2H, high temperature reactions of cyclopentadienyl radial (c-C_5H_5) and phenoxy radical (C_6H_5O) were performed over the temperature range of 1250-1700 K using shock-tubes. Here, cyclopentadiene (c-C_5H_6) and anisole (C_6H_5OCH_3) were used as sources of c-C_5H_5 and C_6H_5O, respectively. By comparing the experimental results with those by computer simulations, the reaction schemes were discussed and some rate constants were determined.
a) Oxidation of c-C_5H_5 radial was performed and the reactivity of c-C_5H_5 was evaluated. b) The CO formation rate in the decomposition of C_6H_5O was observed using Infrared emission and the rate constant of reaction (1) was determined.
c) The H-atom formation rate in the decomposition of C_6H_5O was observed using H-atom resonance absorption spectroscopy. From the results, the dibenzo-p-dioxin production channel was evaluated and the rate constant of reaction (2) was estimated.
d) Reaction products of C_6H_5O decomposition were measured using gas chromatography and the qualitative analysis for lower hydrocarbons and phenol was performed.
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