Thermal stability of polyethylenimine based carbon dioxide adsorbents and its influence on selection of regeneration strategies

By T. Drage, A. Arenillas, K. M. Smith, Colin Snape. 2008

286 citations recorded by the source corpus.

Abstract Two approaches, thermal swing desorption over a range of temperatures and time in an atmosphere of CO 2 and using nitrogen as a stripping gas at elevated temperatures, are explored for the regeneration of the polyethylenimine based adsorbents. Thermal swing regeneration was demonstrated to give good cyclic regeneration capacities (2 mmol g −1 ). However, further reaction of the regenerable carbamate ion to form urea linkages, significantly reduces cyclic capacity and therefore the lifetime of the adsorbent. Regeneration of this secondary reaction product at elevated temperatures was attempted in a nitrogen atmosphere, and whilst recovering some of the original capacity did not fully regenerate the adsorbent. Adsorbent regeneration with nitrogen as a stripping gas was used as an alternative regeneration method, the results of which suggest that steam stripping may be a potential method for adsorbent regeneration.

Subfields: Mechanical Engineering

View Paper: https://www.semanticscholar.org/paper/0673b2cf6a4c67f207f4ad7d1a69e1b41c39de9c

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In Mechanical Engineering

1. David S. Sholl
2. Christopher W. Jones
3. Krista S. Walton

Citations in the corpus

• CO2 capture via adsorption in amine-functionalized sorbents (2016, background): “Degradation of amines through formation of urea linkages has been observed at high temperature in presence of pure CO2 [46,47].”