Table 1 Summary of reactions performed by C. autoethanogenum and C. kluyveri

Clostridium autoethanogenum

Acetate

4 CO + 2 H₂O ⟶ CH₃COO⁻ + H⁺ + 2 CO₂

Ethanol

6 CO + 3 H₂O ⟶ C₂H₅OH + 4 CO₂

Alcohols indirect^a

2 CO + H₂O + X_n–COOH + H⁺ ⟶ X_n–CH₂OH + 2 CO₂

Clostridium kluyveri

Butyrate^b

6 C₂H₅OH + 4 CH₃COO⁻ ⟶ 5 C₃H₇COO⁻ + H⁺ + 3 H₂O + 2 H₂

Caproate^b

6 C₂H₅OH + 5 C₃H₇COO⁻ ⟶ 5 C₅H₁₁COO⁻ + CH₃COO⁻ + H⁺ + 3 H₂O + 2 H₂