RATES OF ADSORPTION IN BENZENE-HEXANE SYSTEM

Breakthrough curves were measured for mixture and single-component adsorption of benzene and n-hexane at the same conditions as previously reported for equilibrium data. The single-component results showed that for the largest particle size and at the highest temperature, 130° C., the rate was controlled by intraparticle diffusion. At these conditions surface diffusion was estimated to account for more than 90% of the intraparticle transport. For smaller particle sizes axial diffusion affected the breakthrough curves, and at lower temperatures surface adsorption was probably a significant resistance. In the linear isotherm range (130° C.) the rate of adsorption of benzene from mixtures was the same as in single-component adsorption. At other conditions interaction effects were involved and the mixture results could not be predicted from the single-component measurements. © 1968, American Chemical Society. All rights reserved.