• Title/Summary/Keyword: chemical mechanism

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Mechanism of Quenching by Dimethylanilines in Liquid Scintillation Counting (Liquid Scintillation Counting 에서의 Dimethylaniline 에 依한 消光機構)

  • Lee, Ik-Choon
    • Journal of the Korean Chemical Society
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    • v.8 no.2
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    • pp.43-46
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    • 1964

  • Quenching constants, q, determined for N,N-dimethylanilines by liquid scintillation counting indicate that the quenching involves an energy transfer process to these compounds causing strong n-${\pi}$ interaction within the quencher molecule, which is then followed by an non-radiative degradation of the excitation energy to ground state.

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A Chemical Reactor Modeling for Prediction of NO Formation of Methane-Air Lean Premixed Combustion in Jet Stirred Reactor (제트 혼합 반응기 내 희박 예혼합 메탄-공기 연소의 NO 생성 예측을 위한 화학 반응기 모델링)

  • Lee, Bo-Rahm;Park, Jung-Kyu;Lee, Do-Yong;Lee, Min-Chul;Park, Won-Shik
    • Transactions of the Korean Society of Mechanical Engineers B
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    • v.34 no.4
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    • pp.365-373
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    • 2010

  • A chemical reactor model (CRM) was developed for a jet stirred reactor (JSR) to predict the emission of exhaust such as NOx. In this study, a two-PSR model was chosen as the chemical reactor model for the JSR. The predictions of NO formation in lean premixed methane-air combustion in the JSR were carried out by using CHEMKIN and GRI 3.0 methane-air combustion mechanism which include the four NO formation mechanisms. The calculated results were compared with Rutar's experimental data for the validation of the model. The effects of important parameters on NO formation and the contributions of the four NO pathways were investigated. In the flame region, the major pathway is the prompt mechanism, and in the post flame region, the major pathway is the Zelodovich mechanism. Under the lean premixed condition, the N2O mechanism is the important pathway in both flame and postflame regions.

  • https://doi.org/10.3795/KSME-B.2010.34.4.365 인용 PDF KSCI