这是早期比较原始的那篇关于HK吸附模型,里面给出了一下比较原始的解释。相关人员可以研究一下

188

Cheng and Yang

1.0

I

ttltll~

I

i

i

lllill|

~

llll~l*|

0.8

0

0.6 0.4 <

0.2

0.0 O-i

1 0 -7 1 0 -6 1 0 4

1 0 -4 10 -3 1 0 -2 1 0 -1

10°

P/Po Fig. 1.

Adsorption isotherm of argon on Faujasite zeolite at 87 K (Borghard et al., 1991). Where constants otk and/Tk are: c l/2 P(-4.5) (3)

Based on Lennard-Jones potential for the dispersion and repulsion energy for adsorbate-adsorbent and adsorbate-adsorbate interactions, Everett and Powl (1976) derived the potential energy of interaction for slit and cylindrical pores as: For slit pores: 'o

k= F ( - 4 . 5 - k)r(k+ 1) ill/2~(--1.5) k= F(-1.5-k)V(k+ 1) (4)

Walker (1966) and Soto et al. (1979) showed the following expression of potential energy for the spherical model when considering a zeolite cavity: l?l,slp(Z)= 2N1e~2 (1)

(=)4 (d) .0} Z----7z+ Z--~-7z

I/~o __1{ 1 ~)' _t '2 I__L_(

× - t L) 4 ( 9\ (1 -

(1"-~ -~) 4 1

,) (5)

For cylindrical pores: = '° V

where

(d°X~ 4~

["' '~2kG

(2)

N1= 4zr L 2Na (6) Horvath and Kawazoe (1983) related the average potential energy to the free energy change upon