phân tích eclectron trong hóa phân tích phần 9 pptx
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o o o
F=-
ZS00
2000
1800
1600
Wavenumber (cm -I }
1300
Figuye 22. FT-IR spectra of NO adsorbed at 25 °C on 25 ~ % Fe/SiO2 containing 5 ~rt % K that
]aacl been calcined for 16 hrs at 300 °C and subsequently treated in H2 for 16 ]xrs at 300
°C. The uppermost spectrum was obtained following exposure of the sample to 10 tort of
NO for 15 ~ followed by e~cuation. The second spectrum was obtained immediately
a~ter admission of 10 tort of 02 at 25 °C. ~e remaining spectra were then obtained at
15 rain int~ in the continuing presence of gaseous
02.
76
e-
¢_
r=,
s._
v
u
c-
o
Z
J
2500
2000 1800 1600
Wavenumber
(cm "l)
m t •
1300
Figure 23.
FT-IR spectra of NO a~sorbed at 25 °C on 25 wt % Fe/SiOz that had been calcined fo~
16 hrs at 300 °C and subsequent])- treated in
H2
for 8 hrs
at
730 °C. The uppermort
spe~ruzn was obtained followin 8 exposure of the sample ~o 10 tort of NO for 15 rain,
followed bs evacuadon. The second spectrum was obtained immediatdy after admission
of 10 to~ of
0
at
25 °C.
The remaining spectra were then obtah~ed at
15 ml~
interrals
in the conr2nuing presence of gaseous, 0,.
77
I "I' "'1 ! • , '1 ! I , I I I. t' Ti ~'~" ' "r
't;
1-::-:.t: "
I
~
:::
i
]~iI i~t:~]- =~!] -~, t
I:
I
J
!
I"
!
-t:[
-___~ ____ /J
=-_E .z
~-:-:
~- , .
: ~ =-t
!
2500
2000 1800 1600
Wavenumber (¢m -1)
t,
~-I- I
1300
Figure 24. FT-IR spectra of NO adsorbed at 25 °C on 25 wt % Fe/SiOm thst had bee~ ~ed for
16 hrs at 300 =C and subseque_nt]y treated ~ ]]2 for 16 ]~'s at 730 °C. Tb~e u~ermost
spectrum was obtained followhlg exposure of the sample to 10 tor~ of :NO-; for~15 rain,
foI]owed by evacuation. The second spectrum was obtained immedialely ~ffFe.~ ~dmissJon
of 10 tort of 02 at 25 °C. The r~g spectrs vere then obtained ~t 15 rh~:inter~ls
in the continuing presence of gaseous Oz.
?8
~0 ; - " "'" " 1 " " •' |" " " " " I "" " " " ' I " " ' " I ' '' " ' I' I~'' ', '; ;
46
r-
0
m
L
O
>
C
O
O
40
O
O
+
C~
3:
8g
80
0
dt .
Q
q,
in
Q)
13
:1
o
m
JD
CO
m
L-
CO
in
In
@
U
0
L
13.
SA-99-0888 (Ruhrchemle LP 33181)
250 °C
1.48 MPa
t
(H2/CO) = 0.67
2.0 NI/g-Fe.h
| • • , , | a i I a ,~
100 200 300 400
500
Time on stream (h)
i • |
800
700
FiB.re 2r,. Stnbilily plot, (lira+CO) converdon vemls t|me on Jtre~m, for .m 5A-09-0885.
°E
4O 0
20.g
1£L0
13.0
I I
C:'~ C4
C5-~11
Ci2~-
I I = !
4-3 ~5 15"7 254 ~ 61~
8.g
7.g
5.0
4,g
3.0
20
• 1,,0
O J:
=
"m m
49 95
157 284
~ • 819
1:;2
I,,
I
C4
C8
I
C10
Figure 2~. F_~ecz of r~ae on .~reaan on R~hr~emie LP 33/81 se]ectis-it.v for run SA-99-08S$: 250
=('~
1.48 MaPa, 2.7~'2/g-cat-t~, CH±/CO) = 0.67.
80
En
.is
3:
m
~5.0 -
25J3-
2~3-
15J3-
~,~,,~ -
5J3-
0J3
m
235 2S5
I
c12+
I
2~ 253
2.0 1.0 Ni/g-cat.h
Temperature (° C)
7°F
.'~ m t
D.0 "~ "~" ¢
235 2~5 235 250
2.0 1.0
NI/g ~t-h
Temperature ~
C)
Fig~e 2T. EKect oftemperatuze on Ru.l~'chemie LP 33/81 se]ecti%'hy lot l-u~ $A-99-08SS: 1.48 MPa,
(~ /CO) =
0.67.
81
35.~-
1DD - :.:,
°=-
I I~1 "
1 2 1 2 t.
235 °C 250 °C
Space Velochy (N1/g-cat-h)
E
~3
,01 m
7.0-
I~]
It~ _ _=-
I~
li~ ,- -
1 2 1 2 4
235 o C 250 o C
Space Velocity (Nl/g-cat-h)
CA¢
I I
C5-~I
FJg~'e 2S. Effect of space ve]ocit3" on ~h~che~ie
LP
33/81 selectivity
for ru~
SA-99-0888:1.48
MPa,
(H~./CO) = 0.6T.
Gg7 ID0
r-
E
E
{3
m
3SD-
3aD-
25D-
:2OD-
ISD-
;r
ID0
~4
I I
~ CA
CS C11
~2÷
1.48 MPa 2.96 MPa
(H2/CO) Feed Ratio
7•
! °
r~- I I
c3
cA
C~
!9- i
~0
2.0-
I_0- I
nn
1.48 MPa 2.96 MPa
(H:~/CO) Feed Ratio
Figure 29. Effect of feed ratio and pressure on Ru~rc.hegfie LP 33/~ 1 selectivity for ru~ 5A-99-0888:
250 °C-
80
70
I::
O
~mm
co
L-
>, O0
r"
0
0
0
0
+ 60
40
• O0
• (I
O
O
l(H2/~O) = 1.0
Q
o
'"I ,I i
J
i . = . I |
IN
nm
[]
FA-63-1308 (100 Fe/5 Cu/4.2 K/8 810 2)
235 eC ,
1.48 MPa
2,0 NI/g-Fe.h
~0 , o , . I
0 100
N
I • , I • , , l_
200 800 400
Time on stream (h)
(H2/CO) = 0.67
mm dmuu uu un mira,
• !
600
m
000
. Pigtzte ,10. Stability plot, {I!2-1-CO) conversion vers,s U,ne on streanl, for rim FA-fi,1-13ClS.
7QD
6QD
5QD
i °
ZZD
1DD
O
m
- t L J
I
~7
nn 48
Time m St~rn ~)
BO
, . ~
421
~ l~l~l~+J~:i~i~~
~DID ~
48 144 240 ~ ~ ~ R~I
Time c~ St~=m ~)
Fi~n'e 31. Effect o[ t.~e o:~ stream on 100 Fe/5 Cu/4.2 K/8 SiO2 c~t.~.vst se.]ecti~tv for Tan FA-
63-1308:235
°C,
1.48
MPa,
2 Nl/g-cat.l%.
(H2/CO) = 1.0 (48-240, 662 h) and 0.67
(s3;-528 h).
85
