Ternary adsorption in columns

Separation of xylenes on Y zeolites. 2. Breakthrough curves and their interpretation

“…This is clearly due to internal diffusion, which, in the liquid-solid adsorption process, is frequently known as the rate-limiting step (Carter and Husain, 1974;Hsieh et al, 1977; Weber and Chakravorti, 1974). The internal diffusion coefficients were then estimated using a suitable pore diffusion model previously reported by Liapis and Rippin (1977a).…”

Mass‐transfer mechanisms for zeolite ion exchange in wastewater treatment

“…Multicomponent models are usually extended from those applied to binary systems, and the competitive effects are most often accounted for through the multicomponent equilibrium equation. Such work has been done using the film-homogeneous diffusion (Crittenden and Weber, 1978;Fritz et al, 1981;Merk et al, 1980;Thacker et al, 1981Thacker et al, , 1983Takeuchi and Suzuki, 1983;Mathews and Su, 1983;Larson and Tien, 1984;Liang and Weber, 1985;Carter and Husain, 1974); film-pore diffusion Rippin, 1977, 1978;Fritz et al, 1981;Merk et al, 1980;Liapis and Litchfield, 1981;Larson and Tien, 1984;Crittenden et al, 1986); and film-heterogeneous diffusion models with macropore and micropore diffusion (Fritz et al, 1981;Merk et al, 1980;Weber and Smith, 1987;Smith and Weber, 1988;Sun and Meunier, 1991;Kapoor and Yang, 1988;Nagelet al, 1987). Differences between the kinetic behavior in binary and multicomponent systems have also been interpreted as being due to solute interactions during diffusion (Mathews, 1975;Liang and Weber, 1985;Marutovsky and Bulow, 1987;Fritz et al, 1981;Merk et al, 1980;Moon and Lee, 1986;Barba et al, 1983;Liapis and Litchfield, 1981).…”

Displacement effect in multicomponent chromatography

“…nent occupies its share of binding sites according to the governing multicomponent isotherms. Experimental observations and simulations for this kind of roll-up in frontal adsorption with mass transfer effects have been reported by many researchers (Thomas and Lombardi, 1971;Rhee and Amundson, 1974;Hsieh et al, 1977;Liapis and Rippin, 1978;Liapis and Litchfield, 1980;Santacesaria et al, 1982;Kapoor and Yang, 1987). A comparison of the breakthrough curves of the binary system and their corresponding pure-component breakthrough curves in Figure 3 indicates that earlier breakthrough results for each component in the binary system.…”