CO2 capture from IGCC gas streams using the AC-ABC process
- SRI International, Menlo Park, CA (United States)
The objective of this project was to develop a novel, low-cost CO2 capture process from pre-combustion gas streams. The bench-scale work was conducted at the SRI International. A 0.15-MWe integrated pilot plant was constructed and operated for over 700 hours at the National Carbon Capture Center, Wilsonville, AL. The AC-ABC (ammonium carbonate-ammonium bicarbonate) process for capture of CO2 and H2S from the pre-combustion gas stream offers many advantages over Selexol-based technology. The process relies on the simple chemistry of the NH3-CO2-H2O-H2S system and on the ability of the aqueous ammoniated solution to absorb CO2 at near ambient temperatures and to release it as a high-purity, high-pressure gas at a moderately elevated regeneration temperature. It is estimated the increase in cost of electricity (COE) with the AC-ABC process will be ~ 30%, and the cost of CO2 captured is projected to be less than $27/metric ton of CO2 while meeting 90% CO2 capture goal. The Bechtel Pressure Swing Claus (BPSC) is a complementary technology offered by Bechtel Hydrocarbon Technology Solutions, Inc. BPSC is a high-pressure, sub-dew-point Claus process that allows for nearly complete removal of H2S from a gas stream. It operates at gasifier pressures and moderate temperatures and does not affect CO2 content. When coupled with AC-ABC, the combined technologies allow a nearly pure CO2 stream to be captured at high pressure, something which Selexol and other solvent-based technologies cannot achieve.
- Research Organization:
- SRI International, Menlo Park, CA (United States)
- Sponsoring Organization:
- USDOE Office of Fossil Energy (FE)
- Contributing Organization:
- Bechtel Hydrocarbon Technology Solutions, Inc.; EIG Inc., National Carbon Capture Center
- DOE Contract Number:
- FE0000896
- OSTI ID:
- 1344095
- Report Number(s):
- DOE-SR-00896
- Country of Publication:
- United States
- Language:
- English
Similar Records
Novel polymer membrane process for pre-combustion CO{sub 2} capture from coal-fired syngas
Rigorous Kinetic Modeling and Optimization Study of a Modified Claus Unit for an Integrated Gasification Combined Cycle (IGCC) Power Plant with CO 2 Capture