Abstract
AbstractAn experimental investigation was made of the adsorption or silica gel of components from light hydrocarbon mixtures, and the results were used to test a multicomponent adsorption theory. Experimental methods included a volumetric technique to measure pure component adsorption and flow techniques for adsorption from mixtures. Although the majority of measurements was made at 100°F., two mixtures were studied over the temperature range 40° to 160°F. Pressure was varied up to 1,800 lb./sq.in.abs. The Brunauer‐Emmett‐Teller (BET) theory of adsorption, as extended to mixtures by Hill, was tested against the experimental data and was found to be adequate for calculating adsorption from hydrocarbon mixtures of components heavier than methane. To account for nonideal behavior, the fugacity of each component in the gas and in the adsorbed phases was calculated by using the Benedict‐Webb‐Rubin equation of state. The differences in experimental and theoretical values for adsorption capacity were less than 10% for most of the conditions tested, but ranged up to about 25% for the highest pressures studied. Although the BET theory represents a simplified model of a complex process, it can be used to supply adsorption data for engineering application over ranges of pressure, temperature, and gas composition usually encountered in adsorption processing of natural gas mixtures.
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