CH4
Methane
Flags: Detected, RATE12
Empirical: CH4
Mass: 16 amu
Heat of formation: -66.8 kJ mol-1
Added to system: 2003-04-28 18:00:51
Reactions: Formation | Destruction
84 CH4 formation reactions
Reaction | α | β | γ | Tl - Tu (K) | |
---|---|---|---|---|---|
1 | H- + CH3 → CH4 + e- | 1.00e-9 | 0.00 | 0.00 | 10 - 41000 |
2 | CH4+ + C2H2 → C2H2+ + CH4 | 1.13e-9 | 0.00 | 0.00 | 10 - 41000 |
3 | CH4+ + C2H4 → C2H4+ + CH4 | 1.38e-9 | 0.00 | 0.00 | 10 - 41000 |
4 | CH4+ + CH3OH → CH3OH+ + CH4 | 1.80e-9 | -0.50 | 0.00 | 10 - 41000 |
5 | CH4+ + H2CO → H2CO+ + CH4 | 1.62e-9 | -0.50 | 0.00 | 10 - 41000 |
6 | CH4+ + H2S → H2S+ + CH4 | 9.45e-10 | -0.50 | 0.00 | 10 - 41000 |
7 | CH4+ + NH3 → NH3+ + CH4 | 1.65e-9 | -0.50 | 0.00 | 10 - 41000 |
8 | CH4+ + O2 → O2+ + CH4 | 3.90e-10 | 0.00 | 0.00 | 10 - 41000 |
9 | CH4+ + OCS → OCS+ + CH4 | 4.20e-10 | 0.00 | 0.00 | 10 - 41000 |
10 | CH3CHO + CRPHOT → CO + CH4 | 1.30e-17 | 0.00 | 263.50 | 10 - 41000 |
11 | CH3COCH3 + CRPHOT → H2CCO + CH4 | 1.30e-17 | 0.00 | 750.00 | 10 - 41000 |
12 | CH3OCH3 + CRPHOT → H2CO + CH4 | 1.30e-17 | 0.00 | 857.00 | 10 - 41000 |
13 | HCOOCH3 + CRPHOT → CO2 + CH4 | 1.30e-17 | 0.00 | 1000.00 | 10 - 41000 |
14 | C2H4+ + e- → CH4 + C | 5.60e-9 | -0.76 | 0.00 | 10 - 300 |
15 | C2H5OH+ + e- → H2CO + CH4 | 1.50e-7 | -0.50 | 0.00 | 10 - 300 |
16 | CH3CHOH+ + e- → CO + CH4 + H | 8.47e-7 | -0.74 | 0.00 | 10 - 1000 |
17 | CH3OCH4+ + e- → CH3 + CH4 + O | 7.48e-7 | -0.70 | 0.00 | 10 - 1000 |
18 | CH5+ + e- → CH4 + H | 1.40e-8 | -0.52 | 0.00 | 10 - 300 |
19 | PCH4+ + e- → P + CH4 | 3.00e-7 | -0.50 | 0.00 | 10 - 300 |
20 | C+ + CH3CH3 → C2H2+ + CH4 | 8.25e-11 | 0.00 | 0.00 | 10 - 41000 |
21 | C2H2 + C2H5+ → C3H3+ + CH4 | 6.84e-11 | 0.00 | 0.00 | 10 - 41000 |
22 | C2H3+ + CH3CH3 → C3H5+ + CH4 | 2.48e-10 | 0.00 | 0.00 | 10 - 41000 |
23 | C2H4+ + CH2CCH → C4H3+ + CH4 | 8.00e-10 | -0.50 | 0.00 | 10 - 41000 |
24 | C2H4+ + CH3CH3 → C3H6+ + CH4 | 5.15e-13 | 0.00 | 0.00 | 10 - 41000 |
25 | C2H4+ + H2S → H2CS+ + CH4 | 7.42e-11 | -0.50 | 0.00 | 10 - 41000 |
26 | C2H4 + C2H5+ → C3H5+ + CH4 | 3.90e-10 | 0.00 | 0.00 | 10 - 41000 |
27 | C2H4 + PH2+ → PCH2+ + CH4 | 1.44e-10 | 0.00 | 0.00 | 10 - 41000 |
28 | C + CH5+ → CH4 + CH+ | 1.20e-9 | 0.00 | 0.00 | 10 - 41000 |
29 | CH2 + CH5+ → CH4 + CH3+ | 9.60e-10 | 0.00 | 0.00 | 10 - 41000 |
30 | CH3+ + C2H4 → C2H3+ + CH4 | 3.50e-10 | 0.00 | 0.00 | 10 - 41000 |
31 | CH3+ + CH3CH3 → C2H5+ + CH4 | 1.48e-9 | 0.00 | 0.00 | 10 - 41000 |
32 | CH3+ + CH3CHO → CH3CO+ + CH4 | 1.65e-10 | -0.50 | 0.00 | 10 - 41000 |
33 | CH3+ + CH3OCH3 → CH3CHOH+ + CH4 | 3.50e-10 | -0.50 | 0.00 | 10 - 41000 |
34 | CH3+ + CH3OH → H3CO+ + CH4 | 2.30e-9 | -0.50 | 0.00 | 10 - 41000 |
35 | CH3+ + H2CO → HCO+ + CH4 | 1.60e-9 | -0.50 | 0.00 | 10 - 41000 |
36 | CH3+ + SiH4 → SiH3+ + CH4 | 1.80e-9 | 0.00 | 0.00 | 10 - 41000 |
37 | CH3OH + C3H+ → HC3O+ + CH4 | 1.76e-9 | -0.50 | 0.00 | 10 - 41000 |
38 | CH3OH + PH2+ → H2PO+ + CH4 | 5.40e-10 | -0.50 | 0.00 | 10 - 41000 |
39 | CH5+ + C2 → C2H+ + CH4 | 9.50e-10 | 0.00 | 0.00 | 10 - 41000 |
40 | CH5+ + C2H2 → C2H3+ + CH4 | 1.60e-9 | 0.00 | 0.00 | 10 - 41000 |
41 | CH5+ + C2H4 → C2H5+ + CH4 | 1.50e-9 | 0.00 | 0.00 | 10 - 41000 |
42 | CH5+ + C2H → C2H2+ + CH4 | 9.00e-10 | 0.00 | 0.00 | 10 - 41000 |
43 | CH5+ + C6H6 → C6H7+ + CH4 | 2.00e-9 | 0.00 | 0.00 | 10 - 300 |
44 | CH5+ + CH3CH3 → C2H7+ + CH4 | 1.20e-9 | 0.00 | 0.00 | 10 - 41000 |
45 | CH5+ + CO2 → HCO2+ + CH4 | 3.20e-11 | 0.00 | 0.00 | 10 - 41000 |
46 | CH5+ + CO → HCO+ + CH4 | 1.00e-9 | 0.00 | 0.00 | 10 - 41000 |
47 | CH5+ + H2CO → H3CO+ + CH4 | 4.50e-9 | -0.50 | 0.00 | 10 - 41000 |
48 | CH5+ + H2O → H3O+ + CH4 | 3.70e-9 | -0.50 | 0.00 | 10 - 41000 |
49 | CH5+ + H2S → H3S+ + CH4 | 1.50e-9 | -0.50 | 0.00 | 10 - 41000 |
50 | CH5+ + HC3N → HC3NH+ + CH4 | 4.50e-9 | -0.50 | 0.00 | 10 - 41000 |
51 | CH5+ + HCN → HCNH+ + CH4 | 1.20e-9 | -0.50 | 0.00 | 10 - 41000 |
52 | CH5+ + HCO → H2CO+ + CH4 | 8.50e-10 | -0.50 | 0.00 | 10 - 41000 |
53 | CH5+ + HCl → H2Cl+ + CH4 | 2.06e-9 | -0.50 | 0.00 | 10 - 41000 |
54 | CH5+ + HNC → HCNH+ + CH4 | 1.20e-9 | -0.50 | 0.00 | 10 - 41000 |
55 | CH5+ + Mg → Mg+ + CH4 + H | 1.40e-9 | 0.00 | 0.00 | 10 - 41000 |
56 | CH5+ + N2O → HN2O+ + CH4 | 9.00e-10 | 0.00 | 0.00 | 10 - 41000 |
57 | CH5+ + S → HS+ + CH4 | 1.30e-9 | 0.00 | 0.00 | 10 - 41000 |
58 | CH5+ + SiH4 → SiH3+ + CH4 + H2 | 2.00e-9 | 0.00 | 0.00 | 10 - 41000 |
59 | CH + CH5+ → CH4 + CH2+ | 6.90e-10 | -0.50 | 0.00 | 10 - 41000 |
60 | H3+ + C2H5OH → CH3+ + CH4 + H2O | 1.50e-9 | -0.50 | 0.00 | 10 - 41000 |
61 | H3+ + C2H5OH → H3CO+ + CH4 + H2 | 4.00e-10 | -0.50 | 0.00 | 10 - 41000 |
62 | H3+ + CH3CHCH2 → C2H3+ + CH4 + H2 | 9.00e-10 | 0.00 | 0.00 | 10 - 41000 |
63 | H3+ + CH3COCH3 → C2H3+ + CH4 + H2O | 1.16e-9 | -0.50 | 0.00 | 10 - 41000 |
64 | H3+ + CH3COCH3 → CH3CO+ + CH4 + H2 | 1.08e-9 | -0.50 | 0.00 | 10 - 41000 |
65 | H3+ + CH3COCH3 → CH5+ + CO + CH4 | 2.31e-10 | -0.50 | 0.00 | 10 - 41000 |
66 | HCN + C2H7+ → CH3CNH+ + CH4 | 2.20e-10 | -0.50 | 0.00 | 10 - 41000 |
67 | NH2 + CH5+ → NH3+ + CH4 | 9.90e-10 | -0.50 | 0.00 | 10 - 41000 |
68 | NH3 + CH5+ → NH4+ + CH4 | 2.50e-9 | -0.50 | 0.00 | 10 - 41000 |
69 | NH + CH5+ → CH4 + NH2+ | 7.10e-10 | -0.50 | 0.00 | 10 - 41000 |
70 | OH + CH5+ → H2O+ + CH4 | 7.00e-10 | -0.50 | 0.00 | 10 - 41000 |
71 | CH3 + C2H3 → C2H2 + CH4 | 1.70e-10 | -1.50 | 300.00 | 300 - 900 |
72 | CH3 + CH3 → CH4 + CH2 | 7.13e-12 | 0.00 | 5052.00 | 1950 - 2300 |
73 | CH3 + H2CO → HCO + CH4 | 1.34e-15 | 5.05 | 1636.00 | 300 - 2500 |
74 | CH3 + H2O → OH + CH4 | 2.30e-15 | 3.47 | 6681.00 | 300 - 3000 |
75 | CH3 + H2S → HS + CH4 | 3.30e-13 | 0.00 | 1105.00 | 300 - 2500 |
76 | CH3 + HCO → CO + CH4 | 2.00e-10 | 0.00 | 0.00 | 300 - 2500 |
77 | CH3 + HNO → NO + CH4 | 3.32e-12 | 0.00 | 0.00 | 10 - 913 |
78 | CH3 + NH2 → CH4 + NH | 4.76e-17 | 5.77 | -151.00 | 300 - 2000 |
79 | CH3 + NH3 → CH4 + NH2 | 9.55e-14 | 0.00 | 4890.00 | 300 - 2500 |
80 | CH3 + O2H → O2 + CH4 | 6.00e-12 | 0.00 | 0.00 | 10 - 2500 |
81 | CH3 + OH → CH4 + O | 3.27e-14 | 2.20 | 2240.00 | 298 - 2500 |
82 | H2 + CH3 → CH4 + H | 6.86e-14 | 2.74 | 4740.00 | 300 - 2500 |
83 | CH3CHO + PHOTON → CO + CH4 | 1.10e-9 | 0.00 | 1.50 | 10 - 41000 |
84 | CH3OCH3 + PHOTON → H2CO + CH4 | 1.50e-9 | 0.00 | 1.60 | 10 - 41000 |
Variation of log fractional abundance (relative to H2) with log time (years) in a dark cloud model. Ref. RATE12 paper.