The technical performance of a reformer is calculated by modelling the reaction with a 1D pseudo-homogeneous model (equations ( )-( )), using a Ni-based steam reforming catalyst, as described by Xu and Froment . As the reforming is performed in large scale, the cost of the unit is estimated according to real plant data, with a total cost of 8'000 €/Nm 3 CH4 . The CO2 capture unit is operated with methyl diethanolamine (MDEA) with a CO2 capture rate of 98% . The CCS cost equals to approximately 80 €/tCO2, with an energy requirement of 200 kWh/tCO2 .