Carbon Capture Costs: FEED & pre-FEED Cost Reports

The University of Texas at Austin, with AECOM Technical Services and Trimeric Corporation, is conducting a FEED study for the Piperazine Advanced Stripper (PZAS) CO₂ capture process at Golden Spread Electric Cooperative’s Mustang Station in Denver City, Texas. Designed for two GE gas turbines with HRSGs and a steam turbine totaling 464 MWe, the PZAS process uses 30 wt% piperazine for higher efficiency, solvent stability, smaller absorber size, and cost savings compared to conventional amine systems. The project will deliver a 30–60% complete design package and a capital cost estimate with ±15% accuracy.

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.

Milton R. Young Station Unit 2 is conducting a FEED study to add a post-combustion CO₂ capture system using Fluor’s Econamine FG Plus™ technology to its lignite-fueled power plant in North Dakota. The design targets 3.6 million tonnes of CO₂ captured annually—twice the scale of the largest existing facility—while integrating advanced heat recovery, aerosol and solvent degradation controls, and cold-climate optimization to achieve the lowest levelized cost of capture at world scale. The study will deliver detailed design, cost, and performance data for financing, permitting, and final project scheduling.