Carbon Capture Costs: FEED & pre-FEED Cost Reports

Tampa Electric Company, with ION Clean Energy, Sargent & Lundy, Koch Specialty Plant Services, and Siemens Energy, completed a FEED study to retrofit post-combustion CO2 capture onto Unit 2 of the Polk Power Station, a 1,190 MWe (1,168 MWe net) 4x4x1 natural gas combined cycle plant in Mulberry, Florida. Using ION Clean Energy's ICE-31 advanced solvent across two parallel capture trains, the design targets at least 95% capture, nearly 3.7 million tonnes of CO2 per year, with downstream Siemens compression and dehydration and integrated pipeline transport to dedicated Class VI geologic storage. Each train includes a direct contact cooler, absorber, stripper, and compression, with the absorber columns sized to support 1x1 operation at 75% combustion turbine load to preserve dispatch flexibility. The study was funded under DOE Award DE-FE0032224 and produced an AACE Class 3 (-20%/+30%) capital cost and cost-of-capture estimate.

In March 2010, the Scottish CCS (Carbon Capture & Storage) Consortium began an extensive Front End, Engineering and Design (FEED) study to assess what exactly would be required from an engineering, commercial and regulatory, perspective in order to progress the CCS demonstration project at Longannet Power station in Scotland (Goldeneye) through to construction. The study has yielded invaluable knowledge in areas such as cost, design, end-to-end CCS chain operation, health and safety, environment, consent and permitting, risk management, and lessons learnt.

Studied the replacement of the SMR units with auto-thermal reforming (ATR) technology. ATRs produce a high concentration CO₂ stream, instead of low concentration combustion flue gases, that is more efficient to capture for sequestration. H₂ production from the unit may also be oversized to provide H₂ as a fuel source for the ATR if target overall CO₂ recovery of the facility is not achieved with the replacement of the SMR alone. The facility capacity is based on the total H₂ production requirements of the existing Plant 01 and Plant 09 ammonia synthesis units. 3 | P a g e Public – Approved for external distribution The scope for the study involves the SMR unit replacement with an integrated ATR and downstream syngas purification including CO₂ capture. The project scope also includes an Air Separation Unit (ASU) to supply oxygen to the ATR unit.