Table 1. Methanogenesis pathways
Pathways
Reactions
References
Hydrogenotrophic pathway
CO
2
+ 4H
2
→ CH
4
+ 2H
2
O
[
57
,
58
,
87
,
89
]
Methylotrophic pathway
CH
3
OH + H
2
→ CH
4
+ H
2
O
4CH
3
OH → 3CH
4
+ CO
2
+ 2H
2
O
CH
3
NH
2
+ H
2
→ CH
4
+ NH
3
[
98
,
121
]
CO
2
, carbon dioxide; H
2
, hydrogen; CH
4
, methane; H
2
O, water; CH
3
OH, methanol; CH
3
NH
2
, methylamine.