In the search for other suitable amines with higher capacity for CO2 absorption than MDEA, the diamine, N1dodecyl-N3.N3-dimethylpropane-1,3-diamine (C12-DMAPA), was tested for its use in biomediated carbon capture and utilization to biomethane. C12-DMAPA, contains two amino-groups, one secondary and one tertiary amine group, both of which could interact with the CO2 to form bicarbonate and carbamate species.