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4 RESULTS FOR THE SYNTHESIS OF METHANOL 4.1 KPI evaluation Table 2 summarises MeOH CDU plant technological, economic and environmental KPIs. For the consumption of catalyst, it is assumed that the 44.5 t Cu/ZnO/Al2O3 [91] are renewed once a year [112]. Appendix 1 Table 12 details the prices considered for the estimation of operating costs. To evaluate indirect emissions, the factor used is 0.508 tCO2/MWh for electricity consumption, as the average of the European energy system [113]. The plant generates covers its own steam needs. Table 2: KPIs results for the MeOH CDU plant. Technological Metrics Mass balance (t/tMeOH) Inlet CO2 1.460 Inlet H2O 1.990 Inlet air furnace 0.813 Outlet MeOH 1 Outlet H2O 0.768 Outlet O2 1.592 Flue gas from furnace 0.905 Energy balance (MWh/tMeOH) Electricity consumption Electricity consumption (w/o electrolyser) 0.177 Heating needs 0.439 Cooling needs 0.862 CO2convR (%) 22 CO2convP (%) 94 H2convR (%) 17 H2convP (%) 100 11.954 CO2 used (tCO2/tMeOH) (renewable electrolyser) Economic metrics 1.280 ISBL (M€) 270 CAPEX (M€) 565 VCP (M€/yr) 494 FCP (M€/yr) 31 GM (M€/yr) 167 BCR (-) 0.29 Environmental metrics (see Table 3 for conventional plant values) CO2 not-emitted (tCO2/tMeOH) 0.6 CO2 change (%) 77 As shown in Table 2, the main feed streams are H2O and CO2. There is an amount of water produced (and a small amount of unreacted water from the electrolysis process), considered as a 37PDF Image | evaluation of CO2 utilisation for fuel production
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