Adsorption analysis: Equilibria and kinetics (Series on by Duong D. Do

Adsorption analysis: Equilibria and kinetics (Series on by Duong D. Do

By Duong D. Do

Covers issues of equilibria & kinetics of adsorption in porous media. even if gasoline section platforms are really thought of, the foundations & suggestions are acceptable to liquid part structures besides. CD-ROM incorporated.

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Additional info for Adsorption analysis: Equilibria and kinetics (Series on Chem. Engineering)

Sample text

3 Ify < y < y b there will be three solutions mathematically. One will be between 0 and 0,, one is between 0, and 02 , and the other is between 02 and 1. The problem of multiplicity does not actually happen in the adsorption system, that is the adsorbed phase does not exhibit three regions of different density at the same time. 3-36) where 0* and 0* are lower and upper solutions for the fractional loading corresponding to the pressure ym. 5. Details of the derivation of eq. 3-36) can be found in Rudzinski and Everett (1992).

Although the choice is purely of personal taste, it is a very convenient method and very stable in solving most adsorption kinetics problems. Isothermal as well as nonisothermal conditions are dealt with in this chapter. Chapter 10 deals with zeolite type particle, where the particle is usually in bidisperse form, that is small pores (channels inside zeolite crystal) are grouped together within a crystal, and the intercrystal void would form a network of larger pores. In other words, there are two diffusion processes in the particle, namely micropore diffusion and macropore diffusion.

This is what we call the high density adsorption. m is provided with this book, and it calculates the fractional loading for a given value of pressure. 3-3) shows typical plots of the fractional loading versus the nondimensional pressure bP for the case of attraction between adsorbed molecules. Various values of c are used in the generation of these plots. 3-3: Plots of the fractional loading versus bP for the Fowler-Guggenheim equation When the value of c is greater than the critical value of 4, we see the two dimensional condensation when the pressure reaches the phase transition pressure.

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