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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, the dissociation pressure of calcium carbonate at 7500 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. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works."