SORPTION PROPERTIES OF ACTIVATED CARBON
Comprehensive progressive rept. no. 6, Jun 1966-Apr 1968
WEST VIRGINIA PULP AND PAPER CO NORTH CHARLESTON SC CHARLESTON RESEARCH LAB
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Equilibrium adsorption isotherms were determined experimentally at several temperatures for GB, GA, and GF on BPL activated carbon and a a super activated coconut carbon. Prediction of these isotherms using experimental DMMP, CC14 and benzene adsorption data and the Polanyi-Dubinin equation was not too successful because the data were not linear as required by the equation. Reasonably good isotherm predictions were, however, obtained using the experimental characteristic curves for DMMP and CC14 to define the adsorptive properties of the adsorbents. Affinity coefficients were determined experimentally since those calculated from parachors were not accurate. The physical and adsorptive properties of an activated carbon impregnated with siloxane resins were investigated. Such impregnation caused a large loss in surface area and adsorptive capacity, but did not selectively increase the hydrophobic properties of the carbon. Deposition of the resin apparently took place principally in the larger pores and resulted in blockage of a portion of micropores. Flow adsorption experiments were made on BPL carbon with DMMP vapor at a concentration of 100 micrograms1 and at a velocity of 90 cmsec. Breakthrough concentration curves, predicted by the theoretical methods of Wheeler and of Allen and Joyce, did not accurately correlate with the experimental points possibly because of the high flow rate used.
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