Abstract
The adsorption of several vapours and gases (ammonia, oxygen, hydrogen, nitrogen, dinitrogen oxide, carbon dioxide, carbon monoxide, water) on titanium, palladium and silver powder has been investigated at 305 K over the equilibrium pressure range 1 Pa to 20 kPa, using a Tian-Calvet microcalorimeter. Some magnetic measurements have also been performed on the titanium and palladium samples. The consistency of the measurements is supported by the fact that the initial differential heat of adsorption of all the gases and the irreversibly adsorbed fraction may be correlated. However, the chemisorption energy does not follow any general order of bond energy for the interaction of the series of gases with the three transition metals. Magnetic measurements suggest that the change in suceptibility may be an indicator of the direction of electron transfer between the gas and the paramagnetic powder.
Get full access to this article
View all access options for this article.