Fuel Control in Methanol-Air and Formaldehyde-Air Fuel Cell Systems

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Abstract
The vaporization of three alloys in the system has been investigated thermogravimetrically. The vaporization is noncongruent as , the more volatile component, is lost preferentially. Due to the similarity of the and vapor pressures, the observed differences in total effusion rates between the alloys and changes in rate expected due to noncongruency are of the magnitude of the experimental error and the vaporization appears to be congruent in gravimetric experiments. Effusion rates, composition changes, and approximate vapor pressures have been determined with the results falling between the limits given by and . The results for a commercial, thermoelement are given for comparison with this work and previously published investigations.

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