Development of process model of CESAR1 solvent system and validation with large pilot data

Conference · Wed Oct 26 04:00:00 EDT 2022

DOI:https://doi.org/10.2139/ssrn.4276820· OSTI ID:1967440

Morgan, Joshua ^[1]; Campbell, Matthew ^[2]; Putta, Koteswara ^[2]; Shah, Muhammad Ismail ^[2]; Matuszewski, Michael ^[1]; Omell, Benjamin ^[3]

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1. NETL Site Support Contractor, National Energy Technology Laboratory
2. Technology Centre Mongstad
3. National Energy Technology Laboratory (NETL)

The United States (U.S.) Department of Energy (DOE)-sponsored Carbon Capture Simulation for Industry Impact (CCSI2) is collaborating with Norway’s Technology Centre Mongstad (TCM) on the development and validation of a process model of the CESAR1 solvent system for post-combustion carbon capture applications. The CESAR1 solvent, developed through the CO2 Enhanced Separation and Recovery (CESAR) project, is an aqueous blend of 2-amino-2-methyl-1-propanol (AMP) and piperazine (PZ) with concentrations of approximately 3 M and 1.5 M, respectively. The process model, developed in the Aspen Plus® software platform, uses thermodynamic and kinetic models from the AMP-H2O-CO2 and PZ-H2O-CO2 system models distributed by Aspen Tech. Enhancements in this work include calibrating the interaction parameters for the AMP-PZ pair with thermodynamic data from the open literature for the AMP-PZ-H2O-CO2 system and updating the reaction kinetics parameters to ensure thermodynamic consistency with the chemical equilibria. The process model is validated with a set of seven steady-state test runs, collected over a wide range of operating conditions at the pilot plant at TCM (12 MWe scale) with natural gas-based combined cycle turbine flue gas (~ 3.5 vol% CO2). The integrated process model developed for the TCM pilot plant includes rate-based models for the CO2 absorption and solvent regeneration processes and predicts key output variables (e.g., CO2 capture percentage, specific reboiler duty) within ± 5% for the validation data set. This paper presents model development and validation work for an initial version of the CESAR1 process model along with discussion of future updates to be made to the model prior to its open-source release.

• Research Organization: National Energy Technology Laboratory (NETL), Pittsburgh, PA, Morgantown, WV, and Albany, OR (United States)
• Sponsoring Organization: USDOE Office of Fossil Energy (FE)
• OSTI ID: 1967440
• Country of Publication: United States
• Language: English