Abstract
Adsorption was observed by measuring the weights of microporous alumina adsorbents as a function of time while they were exposed to varying partial pressures of NaCl and KCl in a stream of Ar. Despite the high experimental temperatures, the results exhibited the characteristics of physical adsorption. Adsorption and desorption were reversible without hysteresis. The kinetics appeared to be limited by transport through the adsorbent pores. The steady-state weight gains were readily described by the BET isotherm. The values of the weight gains at monolayer coverage, deduced from both the steady state and the rate data, were of the size expected from the adsorbent surface areas and estimated molecular cross sections. The phenomenon promises to be useful for removing trace amounts of these corrosive salts from hot combustion gases.
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