Advanced Amine Solvent Formulations and Process Integration for Near-Term CO2 Capture Success

Fisher, Kevin S. ; Searcy, Katherine ; Rochelle, Gary T. ; Ziaii, Sepideh ; Schubert, Craig

关键词: AMINES;    CAPACITY;    CONFIGURATION;    ECONOMICS;    ELECTRICITY;    METRICS;    POWER PLANTS;    SCRUBBING;    SOLVENTS;    STEAM;    CARBON DIOXIDE;    CAPTURE CO2 Capture;    amine scrubbing;    heat integration;    greenhouse gas;    GHG;    carbon capture;    carbon;   

DOI  :  10.2172/945367
RP-ID  :  DOE/ER/84625-1 Final Report
PID  :  OSTI ID: 945367
Others  :  TRN: US201113%%330

学科分类：电力

美国|英语

来源: SciTech Connect

【 摘 要 】

This Phase I SBIR project investigated the economic and technical feasibility of advanced amine scrubbing systems for post-combustion CO2 capture at coal-fired power plants. Numerous combinations of advanced solvent formulations and process configurations were screened for energy requirements, and three cases were selected for detailed analysis: a monoethanolamine (MEA) base case and two “advanced” cases: an MEA/Piperazine (PZ) case, and a methyldiethanolamine (MDEA) / PZ case. The MEA/PZ and MDEA/PZ cases employed an advanced “double matrix” stripper configuration. The basis for calculations was a model plant with a gross capacity of 500 MWe. Results indicated that CO2 capture increased the base cost of electricity from 5 cents/kWh to 10.7 c/kWh for the MEA base case, 10.1 c/kWh for the MEA / PZ double matrix, and 9.7 c/kWh for the MDEA / PZ double matrix. The corresponding cost per metric tonne CO2 avoided was 67.20 $/tonne CO2, 60.19 $/tonne CO2, and 55.05 $/tonne CO2, respectively. Derated capacities, including base plant auxiliary load of 29 MWe, were 339 MWe for the base case, 356 MWe for the MEA/PZ double matrix, and 378 MWe for the MDEA / PZ double matrix. When compared to the base case, systems employing advanced solvent formulations and process configurations were estimated to reduce reboiler steam requirements by 20 to 44%, to reduce derating due to CO2 capture by 13 to 30%, and to reduce the cost of CO2 avoided by 10 to 18%. These results demonstrate the potential for significant improvements in the overall economics of CO2 capture via advanced solvent formulations and process configurations.