(5) Combined reforming is considered: dry reforming is considered to convert CO2 to syngas, while steam reforming is also involved in adjusting the ratio between CO and H2 in the final syngas. Both reforming processes can be assumed to achieve equilibrium. (6) A reforming process is closely connected to FT or MS, thus resulting in a single subsystem. (7) The heating utility can be replaced with low-carbon electricity for a flexible design for utility supply.