Appendix A: CCS Costs

The document details CATF's costing approach for CCS retrofits, which utilizes a standalone gas-fired auxiliary boiler for steam to avoid coal plant heat rate penalties, contrasting this with the IPM platform v6's integrated approach. It provides specific capital and operational cost data for 200 MW and 400 MW coal retrofits, as well as NGCC retrofits, noting that while IPM costs favor very large plants through economies of scale, the CATF approach is more favorable for 400 MW units.

• CATF's modeling approach for coal CCS retrofits uses a standalone gas-fired auxiliary boiler to provide steam to the capture unit, while electricity is drawn from the base coal plant. This method ensures the coal plant's heat rate remains unchanged, though it reduces electricity sales by the auxiliary load and requires natural gas at a rate of 2.77 MMBtu per ton of CO2 captured.
• For 400 MW coal retrofits, CATF's incremental capital costs in 2017 dollars range from $1,501/kW for low heat rate plants (9500 Btu/kWh) to $1,724/kW for high heat rate plants (11500 Btu/kWh). For 200 MW units, these costs range from $1,952/kW to $2,240/kW.
• CATF assumes a modular implementation of post-combustion capture in 400 MW blocks, which allows the capture unit to run at full capacity 24 hours a day even if the coal plant cycles or turns down. Because this approach uses modules, it does not realize economies of scale for plants 1000 MW or larger.
• The IPM platform v6 approach integrates the capture unit into the base plant for steam and electricity, resulting in high capacity penalties (33.6% to 41%) and heat rate penalties (50.6% to 69.6%) for 400 MW units, though these penalties decrease significantly for 1000 MW units.
• For NGCC CCS retrofits, CATF's data for a 90% capture retrofit specifies an incremental capital cost of $808/kW (2017), incremental FOM of $18.25/kW-yr, and incremental VOM of $1.14/MWh, based on a heat rate of 7968 BTU/kWh.

APA

Clean Air Task Force (n.d.). Appendix A: CCS Costs. https://cdn.catf.us/wp-content/uploads/2017/06/21094006/ACE_Joint_NGO_Comments_CCS_AppendixA.pdf

Chicago

Clean Air Task Force. Appendix A: CCS Costs. n.d. https://cdn.catf.us/wp-content/uploads/2017/06/21094006/ACE_Joint_NGO_Comments_CCS_AppendixA.pdf.

Wikipedia

{{cite press release |author=Clean Air Task Force |title=Appendix A: CCS Costs |url=https://cdn.catf.us/wp-content/uploads/2017/06/21094006/ACE_Joint_NGO_Comments_CCS_AppendixA.pdf |access-date=23 October 2026 |via=Climate Insights Directory}}

BibTeX

@misc{cleanairtaskforcendappendix, author = {{Clean Air Task Force}}, title = {{Appendix A: CCS Costs}}, publisher = {Clean Air Task Force}, url = {https://cdn.catf.us/wp-content/uploads/2017/06/21094006/ACE_Joint_NGO_Comments_CCS_AppendixA.pdf}, urldate = {2026-10-23}, note = {Indexed by Climate Insights Directory} }