CO2 Capture by Cold Membrane Operation - Science Direct
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CO2 Capture by Cold Membrane Operation - Science Direct
A relatively high CO2 capture rate is required to drive down the cost per tonne of ... membrane module, as a function of CO2 recovery, in both sweep and ...
Available online at www.sciencedirect.com
ScienceDirect Energy Procedia 63 (2014) 186 – 193
GHGT-12
CO2 Capture by Cold Membrane Operation David Hasse1, Jiefu Ma1, Sudhir Kulkarni1,* ,1Paul Terrien2, Jean-Pierre Tranier3, Ed 1 1 Sanders , Trapti Chaubey , Jacob Brumback 1
Air Liquide Delaware Research & Technology Center, Newark, DE, USA Air Liquide Engineering and Construction, Champigny sur Marne, France 3 Air Liquide R&D-Centre de Recherche Claude Delorme,Chemin de la porte des Loges, Les Loges en Josas, Jouy en Josas F-78354, France 2
Abstract Air Liquide is developing a cost effective hybrid CO2 capture process based on sub-ambient temperature operation of a hollow fiber membrane in combination with cryogenic separation. These membranes, when operated at temperatures below -20ÛC, show two to four times increase in CO2/N2 selectivity with minimal CO2 permeance loss compared to ambient temperature values. Long term (6 month) bench-scale testing with CO2/N2 mixtures at sub-ambient conditions has verified the enhanced separation performance seen at lab scale translated to commercial membrane modules [1, 2]. A relatively high CO2 capture rate is required to drive down the cost per tonne of captured CO2 as it valorizes the cost of the flue gas pre-treatment and compression prior to the membrane unit. However, as the CO2 recovery increases, the productivity of the membrane module decreases, thereby driving up the membrane system capital cost. The main reason for this is a “pinch effect”: the CO2 driving partial pressure differential across the membrane decreases as CO2 recovery proceeds. Computational fluid dynamics modelling shows that this effect can be partially off-set by a sweep operation where a small fraction (
