Please help me.. I am working on flat sheet membrane contactors for carbon dioxide absorption. I constructed a contactor cell in the lab, but it is not efficient at all. I want to operate it in counter current mode. But, however, there is constant leakage of solvent from the gas outlet side, which is really unacceptable. The membrane cell consists of O-ring on the gas side. To prevent leakage, I covered the inner surface of the cell except the membrane area using parafilm.But this doesn’t work. And the results Im getting is 0 % absorption unfortunately. I’m stuck at this point of my research. Can anyone suggest me an efficient design for flat sheet membrane contactor cell please with dimensions if possible. I would be really grateful to you.
Thank you in advance for your help.
Dear Riya Sidhikku Kandath Valappil;
By carefuly reading the description of your problem, I guess that the leaking failure of your contactor is due to the gasket material. What O-ring material are you using? In addition, you mentioned that your solvent is leaking through the gas outlet. I don´t understand why you have solvent in your system. Could you further explain the setup of your absorption experiment?
I used different type of membrane contactors in previous research, but these contactors were developed for liquid-liquid two-phase contactors. Even though I belive that if your sealing is appropriate you can use a similar system for gas applications as well. Following I include the reference to two papers in which we employed two slightly different membrane phase contactors.
https://www.researchgate.net/publication/222562524_A_membrane_bioreactor_for_biotransformations_of_hydrophobic_molecules_using_organic_solvent_nanofiltration_OSN_membranes
https://www.researchgate.net/publication/239199606_Solute_molecular_transport_through_polyimide_asymmetric_organic_solvent_nanofiltration_OSN_membranes_and_the_effect_of_membrane-formation_parameters_on_mass_transfer
I hope this is useful for your research.
Regards
DEAR Rogelio Valadez-Blanco
Thank you very much for your reply. My system is membrane contactor for gas-liquid absorption. So gas and solvent passes through the membrane contactor in counter current mode. The absorption of CO2 in the solvent is then measured using co2 analyser connected to the gas outlet. So my problm is there is solvent passing through this gas outlet, when it is supposed to pss through only the solvent outlet. The gasket used is normal rubber ring. Thanks in advance for your help.
Hi, thanks for elaborating on this. What solvent do you use?
dear Rogelio Valadez-Blanco , I’m using different types of anime solutions like monoethanolamine, diethanolamine and so on...
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