Combustion - 國立中央大學機械工程學系

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Chapter 1 Introduction to <strong>Combustion</strong>Section 5 What is The <strong>Combustion</strong> Process?ME7761.5.1 Chemical Reactione.g. Methane burning in air(1) The global reaction of methane and oxygenCH 4 + 2O 2 CO 2 + 2H 2 O(2) The elementary reaction mechanism( by T. P. Coffee,1984 )Reaction A b B C1. OH + H 2 ↔ H 2 O + H 1.17E9 1.3 18252. H + O 2 ↔ OH + O 1.42E14 0.0 82503. O + H 2 ↔ OH + H 1.80E10 1.0 44804. H + O 2 +M’ ↔ H 2 O +M’ 1.03E18 - 0.72 05. H + HO 2 ↔ OH + OH 1.40E14 0.0 5406. H + HO 2 ↔ O + H 2 O 1.00E13 0.0 5407. H + HO 2 ↔ H 2 + O 2 1.25E13 0.0 08. OH + HO 2 ↔ H 2 O + O 2 7.50E12 0.0 09. O + HO 2 ↔ OH + O 2 1.40E13 0.0 54010. O + HO 2 ↔ OH + O 2 1.25E12 0.0 011. H + H + H 2 ↔ H 2 + H 2 9.20E16 - 0.6 012. H + H + N 2 ↔ H 2 + N 2 1.00E18 - 1.0 013. H + H + O 2 ↔ H 2 + N 2 1.00E18 - 1.0 014. H + H + HO 2 ↔ H 2 + O 2 6.00E19 - 1.25 015. H + H + CO ↔ H 2 + CO 1.00E18 - 1.0 016. H + H + CO 2 ↔ H 2 + CO 2 5.49E20 - 2.0 017. H + H + CH 4 ↔ H 2 + CH 4 5.49E20 - 2.0 018. H + OH + M” ↔ H 2 O +M” 1.60E22 - 2.0 019. H + O + M” ↔ OH +M” 6.20E16 - 0.6 020. OH + OH ↔ O + H 2 O 5.75E12 0.0 39021. OH + CO ↔ CO 2 + H 1.50E7 1.3 -38522. O + CO + M’ ↔ CO 2 + M’ 5.40E15 0.0 230023. H + CO + M’ ↔ CHO + M’ 5.00E14 0.0 75524. CH 4 + O 2 ↔ CH 3 + OH 4.07E14 0.0 704025. CH 4 + H ↔ CH 3 + H 2 7.24E14 0.0 759026. CH 4 + OH ↔ CH 3 + H 2 O 1.55E6 2.13 123027. CH 4 + M ↔ CH 3 + H + M 4.68E17 0.0 4691028. CH 3 + O ↔ CH 2 O + H 6.02E13 0.0 029. CH 2 O + O ↔ CHO + OH 1.82E13 0.0 155030. CH 2 O + H ↔ CHO + H 2 3.31E14 0.0 529031. CH 2 O + OH ↔ CHO + H 2 O 7.58E12E 0.0 7232. CHO + O 2 ↔ CO + H 2 O 3.00E12 0.0 033. CHO + H ↔ CO + H 2 4.00E13 0.0 016
34. CHO + OH ↔ CO + H 2 O 5.00E12 0.0 035. CHO + O ↔ CO + OH 1.00E13 0.0 036. CH 2 O + CH 3 ↔ CHO + CH 4 2.23E13 0.0 259037. CH 3 + OH ↔ CH 2 O + H 2 3.98E12 0.0 038. CH 3 + H 2 O ↔ CH 4 + O 2 1.02E12 0.0 20039. CO + H 2 O ↔ CO 2 + OH 1.50E14 0.0 1190040. CH 3 + CH 3 ↔ C 2 H 6 4.56E37 - 7.65 425041. C 2 H 6 + O ↔ C 2 H 5 + OH 2.51E13 0.0 320042. C 2 H 6 + + H ↔ C 2 H 5 + H 2 5.00E2 3.5 262043. C 2 H 6 + OH ↔ C 2 H 5 + H 2 O 6.63E13 0.0 67544. C 2 H 5 + H ↔ C 2 H 6 7.23E13 0.0 045. C 2 H 5 + H ↔ CH 3 + CH 3 3.73E13 0.0 046. C 2 H 5 ↔ C 2 H 4 + H 2.29E11 0.0 1912047. C 2 H 5 + O 2 ↔ C 2 H 4 + H 2 O 1.53E12 0.0 244648. C 2 H 4 + O ↔ CH 2 + CH 2 O 2.53E13 0.0 251649. C 2 H 4 + OH ↔ CH 2 O + CH 3 5.00E13 0.0 302050. C 2 H 4 + O ↔ C 2 H 3 + OH 2.53E13 0.0 251651. C 2 H 4 + O 2 ↔ C 2 H 3 + HO 2 1.33E15 0.0 2768052. C 2 H 4 + H ↔ C 2 H 3 + H 2 2.00E15 0.0 1000053. C 2 H 4 + OH ↔ C 2 H 3 + H 2 O 4.40E14 0.0 327054. C 2 H 3 + M ↔ C 2 H 2 + H + M 3.01E16 0.0 2038055. C 2 H 3 + O 2 ↔ C 2 H 2 + HO 2 1.57E13 0.0 503056. C 2 H 3 + H ↔ C 2 H 2 + H 2 7.53E13 0.0 057. C 2 H 3 + OH ↔ C 2 H 2 + H 2 O 1.00E13 0.0 058. C 2 H 2 + OH ↔ CH 3 + CO 5.48E13 0.0 689059. CH 3 + H ↔ CH 2 + H 2 2.00E11 0.7 -150060. CH 3 + OH ↔ CH 2 + H 2 O 6.00E10 0.7 101061. CH 2 + O 2 ↔ CHO + OH 1.00E14 0.0 186062. CH 2 + O 2 ↔ CH 2 O + O 1.00E14 0.0 186063. CH 2 + O 2 ↔ CO 2 + H 2 1.00E14 0.0 1860a[M] = total concentration; [M’] = [H 2 ] + 0.74[CO] + 1.47[CO 2 ] + 0.35[O 2 ] +6.5[H 2 O] + 0.44[N 2 ] ; [M”] = [H 2 ] + [CO] + [CO 2 ] + [O 2 ] +5.0[H 2 O] + [N 2 ]bA is in units of cm 3 /mole s or cm 6 /mole 2 s, k = AT B exp(-C/T)c 1.17E9 = 1.17 × 10 9Westbrook and Dryer (1984)Frenklach and Bornside (1984)150 forward reactions∼ Recently proposed chemical reaction mechanisms for soot formationconsist of as many as 2000 reactions.17
Page 2 and 3: Course ContentChapter 1 Introductio
Page 4 and 5: Chapter 1 Introduction to Combustio
Page 8 and 9: 1.2.2 Combustion needs fuele.g. die
Page 10 and 11: 1.2.4 SafetyFires Explosions Materi
Page 12 and 13: Finite reaction rates >> Thermodyna
Page 14 and 15: • Nonpremixed system abound.Indee
Page 18 and 19: Ch 1 Introduction to Combustion ME7

Combustion - 國立中央大學機械工程學系

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