Publisher's Synopsis
Excerpt from Catalysis in the Interaction of Carbon With Steam and With Carbon Dioxide: A Dissertation Presented to the Faculty of Princeton University in Candidacy for the Degree of Doctor of Philosophy
For this reason the duration of steam passage for a given temperature of fuel-bed could be increased.
According to the most recent data,6 the dissociation pressure of calcium carbonate at 750° is 68 mm. Since the partial pressure of carbon dioxide in the gaseous product would be one-third of an atmosphere, or 253 mm., (assuming the process conducted at atmospheric pressure) if all the steam were converted to hydrogen and carbon dioxide, the lime would, in this case, remove 73% of the carbon dioxide present in the issuing gas. How ever, there is always an excess of steam, and the partial pressure of carbon dioxide is always less than 253 mm., and hence a smaller percentage is always removed. When the partial pressure of the carbon dioxide falls to 68 mm., none is removed. This will be the case when about 4 times as much steam as will react is being used or, in other words, when a 25% conversion of steam to hydrogen is being obtained. It is thus apparent that the use of lime for the purpose stated cannot be of considerable consequence, unless temperatures in the neighborhood of 550° are used.
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