I intend to control the pressures from the gas chamber (cathode) and the liquid chamber (anode and electrolyte). The gas flows into the chamber via an MFC and the reaction products are collected in a 15mL vial to be evaluated in the GC. Any access gas is vented to the atmosphere.
Lets call it FLOW BY. The gas chamber is separated by the liquid chamber via a Gas Diffusion Layer.
For the liquid chamber (5% mol. KOH solution) is delivered to the chamber from a sealed container via a peristaltic pump. The container is filled almost 2/3rd by the liquid and there is a pressure transducer to monitor the pressure in the region.
Because of the porous nature of the GDL, it does transmit some of the gas Through the pores to the liquid side, which is collected at the sealed container, and the pressure can be slightly varied. Currently the Absolute pressure at the Gas outlet is atmospheric , ~14.7psiA while the pressure in the water container is 10.5psiA.
Now I want to bring both pressures (liquid and Gas) at the same pressures, so that there is no back diffusion that is from the liquid side to the gas side.
How can I control that in the current setup please.
Regards
Waqas
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