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Enzyme Research
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Special Issues
Enzyme Research
/
2011
/
Article
/
Tab 1
/
Review Article
Formate Formation and Formate Conversion in Biological Fuels Production
Table 1
Free energy changes of some reactions involved in the degradation of fatty acids and alcohols to methane. Calculations based on Thauer et al. 1977 [
45
].
Reaction
ΔG°′ (kJ/mol)
ethanol + H
2
O → acetate
−
+ H
+
+ 2 H
2
+ 9.6
propionate + 2 H
2
O → acetate
−
+ H
+
+ CO
2
+ 3 H
2
+ 76
butyrate + 2 H
2
O → acetate
−
+ 2 H
2
+ 48
acetate
−
+ 2 H
2
O → 2 CO
2
+ 4 H
2
+ 96
4 H
2
+ CO
2
→ CH
4
+ 2 H
2
O
−131
4 formate + 4 H
+
→ CH
4
+ 3 CO
2
+ 2 H
2
O
−145
CO
2
+ H
2
→ formate + H
+
−4.5