Carbon Capture Costs: FEED & pre-FEED Cost Reports

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.

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.

A Front End Engineering and Design (FEED) study was undertaken to design an advanced CO2 Capture Unit (CCU) to produce 1000 tonnes per day of CO2 from the exhaust of three Once-Through Steam Generators (OTSG’s) at Devon Energy’s Jackfish 1 thermal in-situ operations and estimate the capital expenditure for the facilities within +/-15% accuracy. The process utilizes HTC Purenergy Carbon Capture Technology to capture CO2 from the OTSG exhaust gas using an aqueous chemical solvent in an absorber tower, after which the CO2-loaded solvent is passed to a stripper tower where the CO2 is released and the solvent regenerated. The study excludes downstream CO2 compression, dehydration, transportation and storage.