Page 131 - Principles of Catalyst Development
P. 131
CATALYST PREPARATION 119
0
0
5 15 hrs, 400 C REDUCED 15hrs AT 500 C
82% REDUCED 17wt% Ni/SiO z ,93% REDUCED
2
Scale =142 m 9 Ni- I
SUP = 78 m:! 9 Ni- I
4
N(rl
.3
.2
.1
0 2 3 4 o 2 3 4 5
CRYSTALLITE RADIUS ,nm
Figure 6.21. Effect of reduction temperature on crystallite size distribution. I \7R)
0.4 --.J --.J
W
--.J ~ W
W U ~
~ Z u
u Z
z Z I
o 0 .£ 0
i= 0.3 Ie: 0 Ie: W EW
u
:J '-W 'E :J .. U
[]) Eu 0 E:J
0: '" :J '" E W u8
EO
u 0::
I- uw 00::
Cf) 0::
(50.2 iiS~ 0 , o!! ~~
())
0
,
W 1!)r<! 0 - 1!) 01'0
eD -
~:st
I- NeD
:::i
--.J
~ O. I
~
0::
J l
U J fl ~
2 3 4 0 2 3 4 0 234
RADIUS, nm
Figure 6.22. Effect of hydrogen velocity on the extent of reduction for 25% Ni/Si0 2 at
4000C ,1I7B)