Activation of Cellulose-Triacetate Carbon by Reaction with Carbon Dioxide: A Microgravimetric Study
An apparatus incorporating a Cahn RG electrobalance is described which follows the reaction of a cellulose-triacetate carbon with carbon dioxide at 76 torr and temperatures up to 1300 K, and measures the porosity so developed in the carbon by adsorption of carbon dioxide at 195 K. Reaction rates obtained for the activation process yield kinetic parameters which indicate that below about 1208 K the reaction rate is chemically controlled, the influence of mass transport of gases being negligible. A measure of the microporosity developed on activation is obtained by plotting the 195 K adsorption isotherms according to the Dubinin Equation. The influence of heat treatment of the carbon on the activation kinetics and porosity development is considered.
KeywordsReaction Vessel Needle Valve Cellulose Triacetate Industrial Carbon Solid Carbon Dioxide
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