Multilayer modeling of porous grain surface chemistry - I. The GRAINOBLE model

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Table 2

Surface reactions and activation energies.

Number	Reaction	E_a (K)

1	O + O − → O₂	0
2	O + O₂ − → O₃	0
3	H + H − → H_2,gas	0
4	H + O − → OH	0
5	H + OH − → H₂O	0
6	H + O₂ − → HO₂	0
7	H + HO₂ − → H₂O₂	0 (36%)^a
8	H + HO₂ − → OH + OH	0 (57%)^a
9	H + H₂O₂ − → H₂O + OH	1400^b
10	OH + OH − → H₂O₂	0
11	H + O₃ − → O₂ + OH	0
12	H + CO − → HCO	400^c < E_a < 2500^d
13	H + HCO − → H₂CO	0
14	H + H₂CO − → CH₃O	400^c < E_a < 2500^d
15	H + CH₃O − → CH₃OH	0

Notes.

^(a)

Branching ratios measured by Cuppen et al. (2010);

^(b)

Klemm et al. (1975);

^(c)

Fuchs et al. (2009);

^(d)

Woon (2002).

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