:

: (924150021)

1394: . . ((sitostanol . 1995 . (sitosterol) .

. ( . . . . . .

Pd: : Pt,Pd,OS,Ru,Rh,Ni,Co ... Pd . Pd :1. Pd/C (sibunit,4_wt%)2. Pd/C (Aldrich,5_wt%)3. Pd_MCM_41 (5_wt%)4. Pd_HPS (Polystyrene,5_wt%)5. Pd_SBA_15NC (5_wt%)6. Pd/SiO2_C (sibunit,4_wt%) 12 . 4% . ( ) (carbon black) .

A ( ) B,C,D,E ( ) . 4% : Pd . PH 5 6 . HN5% wt 17 . Pd/c Aldrich (reference) . (deactivation): . : 1-sintering: . :I. II. III. ...

2-coking & fouling : .

3- poisoning: poison . .

: :1- BET2- Dubinnin . reference .

Aldrich 68% . . . Aldrich 2 3 sibunit 7 .

Aldrich coking sibunit . 3 Temprature programmed desorption (TPD) . Aldrich 88% sibunit . Aldrich 170 sibunit 130 338 .

: : ... . : 414.7 % 47-49 25% 18% 2% 135 . 1- 5 . 60-80 240 . poison 300ppm .

: . c=c c=o . . .

: :1- 2- Pd/c3- Pd/c4- 5- Pd/c .

1- : 70 45 . ( * ) 3 . (90%) .

250 100 160 83% 52% . .

70 3.7 45 1- 160 100 450 80% 96% .

2- Pd/c 70 3.7 45 Aldrich 5% sibunit 4% . sibunit 160 82% . Aldrich 160 52% . Pd TPD Pd TPD . .

Pd/c(Aldrich) Pd/c(sibunit) Pd/c(sibunit) .

3- Pd/c: Pd/c sibunit 4%wt 3.7 . . 80 80% 160 . .

4- : sibunit 4%WT Pd/c :0.05 mol/lit+ 100 mg catalyst-10.1 mol/lit+ 100 mg catalyst-2

. .

5- Pd/c : 70 3.7 Pd/c sibunit 4%wt .

160 . 96%72%54% .

: . A R . P(poison) . :A + *=

P + *

. . :1) =_2) 3) =

:4) - 5) = 6) = --

:7) +

:8) - = 0

12 8 :9) =

:10)

5310 poison :11)

: (=)12)

. batch fixed bed .

batch: batch :13) 14) 15)

9 10 13 :16)

10 15 :17)

16 17 :18)

:19) c

12 A . :20) Y= 1-=1-

21) = -

batch y=1 . y=1-1 - . poison y 21 .

: 4wt% Pd/c(sibunit) . . 4wt% Pd/c(sibunit) 80 70 . .