Table 2. Coupled reactions resulting from the activities of CODH enzymes, with the molar free energy of reaction.
Product | Reaction
Reactions from CO |
ΔG
0
a,
kJ mol CO −1 |
---|---|---|
Formate | CO + H 2O à HCOO − + H + | −16 |
Hydrogen | CO + H 2O à H 2 + CO 2 | −20 |
Ethanol | 6CO + 3H 2O à CH 3CH 2OH + 4CO 2 | −37 |
n-Butanol | 12CO + 5H 2O à CH 3(CH 2) 3OH + 8CO 2 | −40 |
Acetate | 4CO + 2H 2O à CH 3COO − + H + + 2CO 2 | −44 |
Butyrate | 10CO + 4H 2 à CH 3(CH 2)2COO − + H + + 6CO 2 | −44 |
Methane | 4CO + 2H 2O à CH 4 + 3CO 2 | −53 |
Reactions from H 2/CO | ||
Methanol | CO + 2H 2 à CH 3OH | −39 |
Acetate | 2CO + 2H 2 à CH 3COO − + H + | −67 |
Ethanol | 2CO + 4H 2 à CH 3CH 2OH + H 2O | −72 |
Butyrate | 4CO + 6H 2 à CH 3(CH 2) 2COO − + H + + 2H 2O | −80 |
n-Butanol | 4CO + 8H 2 à CH 3(CH 2) 3OH + 3H 2O | −81 |
Methane | CO + 3H 2 à CH 4 + H 2O | −151 |
aΔG 0 values at standard temperature and pressure.