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Table 3 Standard Gibbs free energies (∆G0′) of different degradation reactions of phenylacetate (C8H7O2) and phenylpropionate (C9H9O2)

From: Formation of phenylacetic acid and phenylpropionic acid under different overload conditions during mesophilic and thermophilic anaerobic digestion

No Reactiona ∆G0′ [kJ mol−1 substrate]  
1 C8H7O2 + 8 H2O → 3 CH3COO + 2 CO2 + 6 H2 + 2 H+ + 123.1 Phenylacetate conversion to acetate, CO2 and H2 via α-oxidation
2 C9H9O2 + 2 H2O → C8H7O2 + CO2 + 3 H2 + 73.6 Phenylpropionate conversion to phenylacetate, CO2 and H2 via α-oxidation
3 C9H9O2 + 10 H2O → 3 CH3COO + 3 CO2 + 9 H2 + 2 H+ + 196.7 Phenylpropionate conversion to acetate, CO2 and H2 via α-oxidation
  1. aReactions according to [19]