Review Article

Reverse Methanogenesis and Respiration in Methanotrophic Archaea

Table 1

Gibbs free energy changes under standard conditions () for anaerobic methane oxidation coupled to different electron acceptors (possibly) performed by ANME.

ReactionGibbs free energy (, kJ mol−1)

CH4 + + HS+ H2O−16.3
(2) CH4 + 4 + 4 + H2O + H+−517.2
(3) CH4 + 8 Fe(OH)3 + 16 H+ → CO2 + 8 Fe2+ + 22 H2O−571.2
(4) CH4 + 4 MnO2 + 8 H+ → CO2 + 4 Mn2+ + 6 H2O−763.2
(5) CH4 + 4/3 Cr2 + 32/3 H+ → 8/3 Cr3+ + CO2 + 22/3 H2O−841.4