Table 4.

Gibbs free energy of complete and incomplete oxidation of glycerol to CO₂ and acetic acid, respectively.

Reaction equation	ΔrGʹ (kJ/reaction)
	pH 3.9	pH 5.0
Eq. 1—Complete oxidation of glycerol to CO2
4 C3H8O3 + 7 SO42− + 14 H+ → 12 CO2 + 7 H2S + 16 H2O	−1142.8	−1099.0
Eq. 2—Oxidation of glycerol to acetic acid
4 C3H8O3 + 3 SO42− + 6 H+ → 4 C2H4O2 + 3 H2S + 8 H2O + 4 CO2	−781.3	−776.6
Eq. 3—Oxidation of acetic acid to CO2
C2H4O2 + SO42− + 2 H+ → 2 CO2 + H2S + 2 H2O	−90.4	−80.6

Δ_rG’ was calculated with Equilibrator (Flamholz et al., 2012) using concentrations of 1 mM for all reactants.