Method for the detection of carbon monoxide in a...

Details Method for the detection of carbon monoxide in a... Method for the detection of carbon monoxide in a...

G - Physics

01

N

G01N 33/00 (2006.01) G01N 27/49 (2006.01)

Patent

CA 2515144

Method and device for the detection of Co in a hydrogen-rich gas stream. Such a gas stream is, for example, fed to a fuel cell. Detection takes place with the aid of a miniature electrochemical cell and is based on the principle that carbon monoxide that moves past the anode screens the anode material, as a result of which the reaction with hydrogen at the anode is impeded. By determining the decrease in the current density it is possible to determine the degree of screening as a function of time and thus the percentage CO. According to the invention the gas is fed past the anode only and the cathode is in direct contact with a water bath.

Cette invention concerne un procédé et un dispositif de détection de Co dans un écoulement de gaz riche en hydrogène. Cet écoulement de gaz peut, par exemple, être introduit dans une pile à combustible. La détection est effectuée à l'aide d'une cellule électrochimique miniature et repose sur le principe que le monoxyde de carbone qui passe devant l'anode crible le matériau anodique, ce qui empêche la réaction avec l'hydrogène de se produire au niveau de l'anode. Le fait de déterminer la baisse de densité de courant permet de déterminer le degré de criblage en fonction du temps et par conséquent le pourcentage de Co. Selon la présente invention, le gaz passe devant l'anode uniquement et la cathode est en contact direct avec un bain-marie.

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