Open AccessEffect of absorption enthalpy on temperature-swing CO2 separation process performance
Author(s) -
Ernst A. van Nierop,
Sahand Hormoz,
Kurt Zenz House,
Michael J. Aziz
Publication year - 2011
Publication title -
energy procedia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.474
H-Index - 81
ISSN - 1876-6102
DOI - 10.1016/j.egypro.2011.02.054
Subject(s) - swing , enthalpy , absorption (acoustics) , process (computing) , separation (statistics) , materials science , absorption refrigerator , thermodynamics , chemistry , analytical chemistry (journal) , chromatography , computer science , engineering , mechanical engineering , physics , composite material , refrigeration , machine learning , operating system
We 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
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