Effect of absorption enthalpy on temperature-swing CO2 separation process performance
van Nierop, Ernst A.
House, Kurt Z.
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CitationVan Nierop, Ernst A., Sahand Hormoz, Kurt Z. House, and Michael J. Aziz. 2011. “Effect of Absorption Enthalpy on Temperature-Swing CO2 Separation Process Performance.” Energy Procedia 4: 1783–1790. doi:10.1016/j.egypro.2011.02.054.
AbstractWe model a CO2 absorption process to elucidate the rationale for the search for a solvent with an enthalpy of absorption (ΔH) of low magnitude. We explore the relationship between ΔH and the system’s performance. While in general a lower magnitude appears to provide better system performance because it permits the stripper temperature to be decreased, as the magnitude drops below its value for monoethanolamine amine (MEA), 80 kJ/mol, the required solvent mass flow rate must increase precipitously and/or the flue gas must be cooled significantly. We argue that the associated parasitic pumping and cooling loads, as well as the increased capital cost, may set a practical lower limit on the magnitude of the enthalpy of absorption that is not very different from that of MEA.
Citable link to this pagehttp://nrs.harvard.edu/urn-3:HUL.InstRepos:34264570
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