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Published byRandolph Lawson Modified over 6 years ago
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Projects/funding for 1 or 2 Funded by consortium of 24 companies
Prof. Gary T. Rochelle CPE 5.462, 15 PhD Projects/funding for 1 or 2 Technology Area CO2 Capture from Flue Gas ( to address Global Climate Change) By Aqueous Absorption/Stripping Funded by consortium of 24 companies Fundamental Areas Mass Transfer with Reaction in the Boundary Layer Applied Aqueous Solution Chemistry Aqueous Thermodynamics Aqueous Reaction Kinetics/Engineering Crystallization in Aqueous Solutions Applied Process Simulation & Optimization Mass Transfer in Gas/Liquid Contactors
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The Present Problem Global climate change is happening
Because of CO2 emissions From Coal Combustion
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System for CO2 Sequestration
Disposal Well Net Power Power CaCO 3 CO 2 Coal Boiler ESP FGD Abs/Str Flyash CaSO 4 30 psia Steam
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MEA Absorption/Simple Stripping
CO2 DT=10oC H2O Rich Lean Absorb Strip 50°C 117°C 1 atm 2 atm Steam 30 psia 10% CO2 5% O2 12% H2O Purge to 30% MEA Reclaim SO2, HCl, NO
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Practical Problems Energy = 20-30% of power plant output
Steam for stripping CO2 Compression Gas pressure drop Amine degradation 10% of cost Environmental impact Capital Cost 5 x 50 ft diameter absorbers and strippers 50 ft packing
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Approaches to Practical Problems
Better Solvents – Such as Piperazine Faster CO2 Transfer Greater Capacity Greater Stability - Oxidation inhibitors Better Processes - Stripping by Multistage flash Solvent Reclaiming CaSO4/K2SO4 Precipitation Better contacting Packing to get G/L area
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Fundamental Lab and Modeling Problems
Measure & Model Thermo with high amine & ions Measure & Model Mass Transfer w Reaction Measure/Minimize oxidative & thermal degradation Develop Methods of Solvent Reclaiming
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Modeling and Pilot Plant Activities
Develop Integrated Models Validate Models with Pilot Plant Test and Develop Packing Develop Innovative Flowsheets
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