Co-capture and storage of CO2 with other impurities from coal and heavy fuel-fired power plant flue gases

Publisher Summary The cost of emissions reduction for several key components of power plant flue gas incurs substantial increases to electricity costs. The components established as most important are CO 2 , SO 2 , NO x , and mercury. IEA wished to examine the technical feasibility, potential synergies and associated cost reductions associated with simultaneous capture, transportation and sequestration of two or more pollutants. Using eight fuels covering a range of thermal coals plus petroleum coke and bitumen emulsion, SNC-Lavalin International Inc. (SLII) established three base cases: State-of-the art conventional thermal power generation; partial oxidation/gasification, and combustion using pure oxygen with recycled flue gas. For each flue gas stream, SLII developed conceptual designs and cost estimates for capture technology and equipment to recover the pollutants to an approximate standard expected to be the norm in the EU five- ten years from now. The designs include transport of the captured streams for a nominal distance of 100 km, injection into four sinks: enhanced oil recovery, enhanced coal bed methane recovery, depleted oil & gas reservoirs, and deep saline aquifers.