Impact of CCS on the Economics of Coal-Fired Power Plants : Why Investment Costs Do and Efficiency Doesn’t Matter

In this paper we analyze how development of the economics related to CCS technology in coal-fired power plants affects market diffusion. Specifically, we (1) show the (significant) variance in economic expectations for commercial-grade CCS hard coal power plants observed in selected recent scientific publications; (2) analyze the impact of economic factors related to CCS on electricity generation costs; and (3) study possible deployment of CCS technology in Europe using the bottom-up electricity sector model HECTOR. Simulation results show that investment costs strongly influence the market deployment of coal-fired CCS power plants, leading to a share of 16% in European generation capacity by 2025 with the lowest observed investment costs of 1400 €/kW, but only 2% with the highest of 3000 €/kW. A variation of conversion efficiency between 37% and 44%, the minimum and maximum observed values, only leads to a share of CCS-equipped power plants between 13 and 15%. These findings are robust for the Base Case with a CO2 price of 43 €/t and also for sensitivities with 30 and 20 €/t CO2, but with a lower effect, as the overall share of CCS is significantly reduced at these prices