for methanol. For both cases, this corresponds to the product of the efficiencies of electrolysis, chemical synthesis and reforming. The higher efficiency of methanol process is originated from the lower exothermicity of the methanol synthesis from CO2 (compared to the Sabatier reaction) and the lower heat requirement of the reforming reaction. This is at the origin of the better indicators for methanol as an H2 carrier than methane. The situation is reversed when considering the electricity-to-electricity efficiency, where methane shows a higher value (28,87%) compared to methanol (21.73%). In any case, the re-electrification of the chemical bonds suffers from significant penalisation in efficiency due to the low effectiveness of the electricity production step.