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Τίτλος: CO2 absorption in a high efficiency silicon nitride mesh contactor
Συγγραφείς: Constantinou, Achilleas 
Barrass, Simon 
Pronk, Frans 
Bril, T. 
Wenn, David A. 
Shaw, John Edward Andrew 
Gavriilidis, Asterios 
Major Field of Science: Natural Sciences
Field Category: Chemical Sciences
Λέξεις-κλειδιά: Carbon dioxide absorption;Microchannel;Multiphase contactor;Membrane;Microreactor
Ημερομηνία Έκδοσης: 1-Οκτ-2012
Πηγή: Chemical Engineering Journal, 2012, vol. 207-208, pp. 766-771
Volume: 207-208
Start page: 766
End page: 771
Περιοδικό: Chemical Engineering Journal 
Περίληψη: CO 2 absorption in sodium hydroxide and diethanolamine solutions was investigated in a silicon nitride mesh contactor. Mesh contactors allow two phases to come into direct contact with each other, for the purpose of mass transfer between them without dispersing one phase into the other. The 1μm thick silicon nitride mesh, containing a high density of uniform 0.5μm pores, facilitated the stabilization of the gas liquid interface at its pores. Experimental results were obtained for 2M NaOH or 2M DEA solutions and 20% vol. CO 2/N 2 inlet concentrations, with a fixed inlet molar ratio CO 2:NaOH of 0.4. Results showed that 23% of the CO 2 contained in the inlet stream was removed within 0.5s experimental gas residence time. CO 2 removal efficiency was higher when NaOH was used for absorption as compared to DEA. Experiments were also conducted with different mesh/membrane contactors: a PTFE membrane (thickness 20μm, pore size 0.5-5μm), a Ni-25 mesh (thickness 25μm, pore size 25μm) and a Ni-5 mesh (thickness 5μm, pore size 5μm). The silicon nitride mesh demonstrated the best performance primarily due to its small thickness.
URI: https://hdl.handle.net/20.500.14279/23796
ISSN: 13858947
DOI: 10.1016/j.cej.2012.07.059
Rights: © Elsevier B.V.
Type: Article
Affiliation: University College London 
FluXXion BV 
CRL Ltd. 
Publication Type: Peer Reviewed
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