2005 Fiscal Year Final Research Report Summary
Kinetic Study of the Combustion of Dimethylether
| Project/Area Number |
16560672
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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 |
Reaction engineering/Process system
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| Research Institution | Niigata Sangyo University |
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Principal Investigator |
FUJII Nobuyuki Niigata Sangyo University, Department of Industry, Professor (50011119)
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| Co-Investigator(Kenkyū-buntansha) |
ABDUTEYIM Abuduaini Niigata Sangyo University, Department of Industry, Research Professor (80367416)
MURAKAMI Yoshinori Nagaoka Univ. of Technology, Dept of Chemistry, Research Associate (70293256)
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| Project Period (FY) |
2004 – 2005
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| Keywords | DIMETHYL-ETHER / COMBUSTION / KINETICS / SHOCKTUBE-EXPERIMENT / OH-EMISSION / PRODUCTS-ANALYSIS / H-ATOM-ABSORPTION / QUANTUM-CHEMICAL-CALCULATION |
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| Research Abstract |
In order to confirm the combustion mechanism of dimethylether (DME, CH_3OCH_3), high temperature oxidation of DME were performed behind reflected shock waves using time-resolved OH emission, H-atom resonance absorption spectroscopy and reacted gas analysis with gas chromatographs. The studies were done using DME-O_2-Ar also ethanol (EtOH, C_2H_5OH, isomer of DME) -O_2-Ar mixtures in the temperature range 1300-1800K at pressures in the range 1.3-2.7 atm. By comparing the experimental results with those by computer simulations, the reaction schemes were discussed and the roles of some elementary reactions important in the initial stage of DME oxidation were evaluated.
1) Combustion of DME was measured using OH emission at 310 nm and the induction periods of OH were evaluated by comparison with computer simulations.
2) The reacted gases for the oxidation of DME and of EtOH in the shock tube were extracted and analyzed by two gas chromatographs each having a thermal conductivity and a flame ionization detector. The selectivity of CO, CO_2, C_2H_4 and other products in the oxidation of DME were compared with those of EtOH oxidation, especially under fuel rich condition. From the comparison, the reaction scheme in the initial stage of DME oxidation was discussed.
3) The H-atom formation rate in the oxidation of DME was observed using H-atom resonance absorption spectroscopy. From the results, the relaxation times for H atom formation were evaluated and compared with the simulated values using some reaction scheme. From the comparison, it was found that the decomposition rate of DME was important in the initial stage of DME oxidation.
4) Quantum chemical calculation for the oxidation and decomposition of CH_3OCH_2 radical at low temperature were performed for understanding the roles of the mechanism for those reactions.
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[Presentation] ジメチルエーテルの燃焼化学反応2005
Author(s)
村上 能規・A.Abdureyim・藤井 信行
Organizer
第43回 燃焼シンポジウム
Place of Presentation
タワーホール船堀
Year and Date
2005-12-05
Description
「研究成果報告書概要(和文)」より
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