Membranes postcombustion

The technologies currently available for post-combustion capture are classified into five main groups absorption, adsorption, cryogenics, membranes and biological separation. The most mature and closest to market technology and so, the representative of first generation of postcombustion options, is capture absorption from amines. 

Postcombustion Capture Processes with Membrane Separation... 

Merkel T., Lin H., Wei X., Baker R. 2010. Power plant postcombustion carbon dioxide capture An opportunity for membranes. Journal of Membrane Science 359 126-139. 

Favre, E., Membrane processes and postcombustion carbon dioxide capture Challenges and prospects. Chemical Engineering Journal, 2011. 171(3) 782-793. 

Yang, D. et al.. Potential of two-stage membrane system with recycle stream for COj capture from postcombustion gas. Energy and Fuels, 2009. 23(10) 4755-4762. 

Chabanon, E., Roizard, D., Favre, E. 2011. Membrane contactors for postcombustion carbon dioxide capture A comparative study of wetting resistance on long time scales. Ind. Eng. Chem. Res. 50 8237-8244. 

R. Bounaceur, N. Lape, D. Roizard, C. Vallieres, E. Favre, Membrane processes for postcombustion carbon dioxide capture A parametric study, Energy, 31, 2556-2570 (2006). 

Hybrid membranes have been reported to successfully increase the performance of polymeric materials in different gas separation applications, such as the production of enriched oxygen or nitrogen streams, biogas and natural gas upgrading, and CO2 capture in postcombustion. 

Lately, a large proportion of research efforts have been focused on the development of gas separation membranes for CO2 captnre, nnder pre- or postcombustion conditions, becanse membrane technology offers a more environmentally friendly and sustainable approach compared with traditional systems (ie, absorption columns) and can compete in a wide variety of operating conditions with liqnid absorption [25]. 

However, for processes such as postcombustion removal of CO2 from the flue gases of coal-fired power stations, improvements in membrane performance are required to make them economically viable (76). 

Postcombustion CO2/N2 Gas-liquid absorption in chemical solvent (MEA) 1. Hybrid process Membrane contactors (intensified gas-liquid... 

It should be noted that, similarly to other studies in the field, CO2 is systematically considered as the fast permeating species for polymeric membrane simulations. In fact, apart from a very specific observation, no polymeric material has been reported with N2 permeating faster than CO2. The decisive advantages that a nitrogen selective material would offer for CO2 postcombustion capture have been discussed on a theoretical basis. 

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