Liquid Sorbents

Liquid Sorbents

Aim:

The main aims are:

  • To design and test reactive ionic liquids (ILs) which exhibit excellent capture and release of CO2
  • To investigate structure-CO2 capture correlation to determine optimum structural design
  • To understand how the ionic liquid systems developed respond to impurities in the gas feed based on anaerobic/flue gas feeds (H2O, CH4, H2S, NOx and SOx)
  • To further adapt the ionic liquids to reduce negative effects on CO2 capacity and increase recyclability.

Main Achievements:

  • Detailed studies conducted of co-absorption of water and CO2 in a set of tetraalkylphosphonium superbase ILs
  • Developed the highest CO2 absorption capacity IL (with a single site for absorption) to date; [N66614][124Triz] which has a CO2 capacity of 1.33 nCO2:nIL
  • Demonstrated the use of mixed monoethanolamine-IL (MEA-IL) systems to give enhanced CO2 absorption
  • Supply of low melting point ionic liquids for optimisation of microbubble technology
  • In steady flow, studied effect of  Ionic Liquids on bubble size
  • Measured CO2 adsorption for biogas sweetening using Ionic Liquids and MEA
  • Undertaken computational modelling of carbon capture liquids (MEA and ILs) with rising microbubbles heat, mass, and momentum transport processes

Selected Outputs:

  • “CO2 capture in wet and dry superbase ionic liquids”, S.F.R. Taylor, C. McCrellis, C. McStay, M. Mercy, R.G. Bell, N.H. de Leeuw, J. Jacquemin and C. Hardacre, Journal of Solution Chemistry (Accepted)
  • “CO2 capture under wet and dry conditions utilising ionic liquids composed of superbase anions”, S.F.R. Taylor, 248th ACS National Meeting & Exposition, San Francisco (USA), August 2014 (Oral presentation)
  • “Carbon Dioxide conversion to biofuel (biomethane) using microbubble generated by fluidic oscillation”, MK Al-Mashhadani & K Armstrong, ICCDU XII, Washington (USA), June 2013 (Oral presentation)

 ⇒ Modelling

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