Model
Number
Elementary Reaction
FT-I
1 2 3 4 5 6 7 8
CO + s ↔ COs COs + s ↔ Cs + Os H2 + 2s ↔ 2Hs Cs + Hs ↔ CHs + s CHs + Hs ↔ CH2s + s Os + Hs → HOs + s HOs + Hs → H2Os + s H2O + s → H2Os
FT-II
1 2 3 4 5 6 7
CO + s ↔ Cos H2 + 2s ↔ 2Hs COs + Hs ↔ HCOs + s HCOs + Hs ↔ Cs + H2Os Cs + Hs ↔ CHs + s CHs + Hs ↔ CH2s + s H2O + s → H2Os
FT-III
CO + s ↔ COs COs + H2 ↔ H2COs H2COs+ H2 ↔ CH2s + H2O COs + s ↔ Cs + Os Cs + Hs ↔ CHs + s CHs + Hs ↔ CH2s + s Os + H2 → H2Os H2O + s → H2Os