Adsorption of water vapor by selected containment aerosols : chlorides and cement dust
Abstract
[ACCESS RESTRICTED TO THE UNIVERSITY OF MISSOURI AT REQUEST OF AUTHOR.] The macroscopic adsorption isotherms of water vapor on selected containment aerosols of a nuclear reactor such as cesium iodide, cesium chloride, potassium chloride, lithium chloride, and containment concrete dust were studied using a Cahn 2000 electrobalance. The equilibrium adsorption data were obtained at various relative humidities and temperatures. The adsorption isotherm data of water vapor on cesium chloride, potassium chloride, and cesium iodide are of Type III. The adsorption isotherm data of water vapor on containment concrete are Type VIII. The equilibrium adsorption data on all these adsorbents provided a single characteristic curve when correlated according to Polanyi's potential theory. Hysteresis was observed upon desorption for cesium chloride and containment concrete samples. The isosteric heats of adsorption were calculated at different loadings. The isosteric heats of adsorption illustrate that all the adsorbents provided energetically heterogeneous adsorption sites. Jovanovic equation and an empirical equation suggested by Loyalka and Ghosh were used to fit the data over the entire pressure range.
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