Адсорбция и определение характеристик поверхности...

Download Адсорбция и определение характеристик поверхности твердых тел

If you can't read please download the document

Upload: afric

Post on 09-Jan-2016

102 views

Category:

Documents


18 download

DESCRIPTION

Адсорбция и определение характеристик поверхности твердых тел. Л. Д. Аснин. ЛИТЕРАТУРА. Грег С., Синг К. Адсорбция, удельная поверхность, пористость. 1984. Rouquerol F., Rouquerol J., Sing K. Adsorption by powders and porous solids. 1999. Брунауэр С. Адсорбция газов и паров. 1948. - PowerPoint PPT Presentation

TRANSCRIPT

  • . .

  • ., . , , . 1984 Rouquerol F., Rouquerol J., Sing K. Adsorption by powders and porous solids. 1999 . . 1948

  • m 1 2

  • S ms

  • V0 .S C0

  • q q = (0) + 0q

  • qm - b A() + S() AS()

  • 4 90(I. Langmuir, 1918)qm = 110 3

  • (p/q) vs. p(q/p) vs. q/p(1 - ) vs.

  • R2=0.9991(p/q) vs. p(q/p) vs. q /p(1 - ) vs.

  • 1. : 3 : + : 1 ; Rln{/(1- )} D.H. Everett, Trans. Faraday Soc. 1950, 46, 943

  • 2. ? -Al2O3.. , .. , , 1989, 30, 69

  • , i , bi i i

  • - N-- 1 L-2 D-

  • i bi+1 bi = db = const db dqm = Qi+1 - Qi, Qi b (bmin; bi).

  • : - bLF

  • : -I. Langmuir (1918) 4 90 -

    -qm110119b0.1150.093

  • 3. ?Carrot et al., Carbon, 1987, 25, 59 77

  • --

  • Bp/p0q qB qm

  • qm qm - () -

  • J. Feder, J. Theor. Biol., 1980, 87, 237

    = 0.54

  • qm (q*) - - X. Jin et al. J. Phys. Chem., 1993, 97, 4256 = 0.33

  • S = qmNANA - F. Rouquerol et al. Adsorption by powders and porous solids. 1999

    (2)() . CO27777771952930.13 0.200.10 0.190.13 0.200.14 0.220.25 0.510.1620.1380.1410.1630.3070.1620.1380.1410.2100.430

  • 0.70 0.59

  • /0 0.05 0.30,

  • , , , , N2 SiO2 Al2O3 77 C = 200-300 SiO2 Al2O3

  • 2D

  • < 2 2 50 > 50 -

  • F. Rouquerol et al. Adsorption by powders and porous solids. 1999N2, 77K ( 0.4 S ()

  • t- (Lippens & de Boer, 1965): (t) , t pr S

  • t- t- (t p/po) t q = f(t) . . slopet

  • t- 77 , (de Boer et al. J. Coll. Interface Sci. 1966, 21, 405)

  • s- (Sing, 1968) (q/qm) s =(q/q0.4), q0.4 q / = 0.4

  • F. Rouquerol et al. (1999)

  • /0sq 3 stp/ s- Bhambhani et al. J. Coll. Interface Sci. 1972, 38, 109

  • s- P.J.M. Carrot et al. Carbon 1987, 25, 59 (77) S- XR602

  • : - - , 20%

  • (1914) (< 2 ) , , . .. / , p . p = po ( )

  • -DG = A = RT ln(p0/p) W = q/, W0

  • -E0 ( )

    , ( ) -( ) lnW ln2(p0/p)

  • N2 77P.J.M. Carrot et al. Carbon 1987, 25, 59AX21AX21JF517JF517CARBOSIEVECARBOSIEVEJF005JF005W, 3 stplnWp/p0ln2(p/p0)p/p0

  • N2, 77KN2, 77K N2 77P.J.M. Carrot et al. Carbon 1987, 25, 59

  • P.J.M. Carrott et al., Carbon, 2000, 38, 465 298 p/p0 0.02 0.15

  • () (d) : 1 < d < 3 : 3 < d < 5 p . p

  • d < 1.5 1.5 < d < 2.0

  • = 0.31 F. Rouquerol et al. Adsorption by powders and porous solids. 1999

  • C.E. Webster et al. J. Phys. Chem. B 1999, 103, 1242

  • C.E. Webster et al. J. Phys. Chem. B 1999, 103, 1242 MIN-1 MIN-1 MIN-2

  • ( )/( ) P.J.M. Carrott, Colloids and Surfaces, 1991, 58, 385(100% )

  • F. Rouquerol et al. Adsorption by powders and porous solids. 1999

  • q0(mic)q

  • q0(mic)q

  • q0(mic)q

  • (1975)- (1977)

  • - .

  • , dW/dd, 3//d, H. F. Stoeckli, Carbon, 1990,28, 1.

  • + q = qmic + Sexttt ,

  • + tq W0/Mr = q0(mic)tg = Sext Sext p/p0 = 0.40 0.75

  • + (: N2 )Bhambhani et al. J. Coll. Interface Sci. 1972, 38, 109 s-

  • vm hw - (Bansal RC, Donnet JB, Stoeckli F. Active carbon. 1988. pp. 119162)

  • E0( -1) = 10.8/d () + 11.4Smi (2 -1)= 2000W0 (3 -1)/d () -iH = k1Smi + k2W0 + k3Sext-iH = c1Smi + c2(W0 c3Smi) + c4Sext-iH ( -1)= 0.136Smi + 141(W0 4.110-4Smi) + 0.114Sext

  • Pure & Appl. Chem., 1985, 57, 603

  • - vl rK ( )

  • rp = rK + t L = rK + 2t

  • , (BJH: Barrett, Joyner, Halenda) ,

  • , ri, (p/p0)i. vp(ri)