E ?1## : power generation of NGCC, GJ/h E ?1##@;"' : net power out for a NGCC coupled with PSA, GJ/h E ?1##@!:' : net power out for a NGCC coupled with MEA, GJ/h In this work, heating is proposed to be partially substituted by CCS electricity. As such, lowcarbon heating is used in the CCU system. Herein, the GHG emission factor for low-carbon heating is calculated as follows, 1) Roh et al. 2) Cuéllar-Franca et al. 3) Munoz et al. 4) Average the emission factors of propene and propane in the software Umberto (method: