tishreen university journal for research and scientific ... · hossam al-rakad *** (received / / ....
TRANSCRIPT
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Tishreen University Journal for Research and Scientific Studies - Basic Sciences Series Vol. ( ) No. ( )
110C
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Tishreen University Journal for Research and Scientific Studies - Basic Sciences Series Vol. ( ) No. ( )
Influence of Physio-chemial Treatment on the Catalyst
C Used in Heavy Oil Distillation Treatment Unit
Dr. Ibrahim Raheb
Dr. Mohamed Gafar ** Hossam Al-rakad ***
(Received / / . Accepted / / )
� ABSTRACT �
We studied the influence of physio-chemical and thermal treatment on the textural of
spent catalyst, used in heavy oil distillation treatment unit in Banias Refinery. We determined the porosity structure parameters by analyzing adsorption data of nitrogen gas applied on samples of catalyst at different temperatures. We found that the thermal treatment mainly leads to a decrease in the specific surface area, the highest decrease was
at C. The influence on the mean porosis radius was different. The chemical treatment
with naphtha and acetic acid followed by thermal treatment lead to clear changes of texture particularly in the specific surface area. A remarkable increase in the specific surface area
was of M of acetic acid and C. The increase of thermal treatment temperature leads
to a decrease in the specific surface area. Thermo-chemical treatment showed variable effects on the porosis radius average.
Keywords: Spent catalysts, Thermal treatment, Themo-chemical treatment, adsorption, Porosity.
* Professor, Department of Chemistry, Faculty of Sciences, Tishreen University, Lattakia, Syria.
** Assistant Professor, High Institute for Environment Research, Tishreen University, Lattakia, Syria. *** Postgraduate Student, Department of Chemistry, Faculty of Sciences, Tishreen University, Lattakia, Syria.
Sciences SeriesTishreen University Journal. Bas
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hydroprocessing
I.G.Farben[ ]
[ ]
[ ]2 3Al O
2 3/V Mo Al O
[ ]
[ ]
hydrodesulpherazation HDS
hyrdodenitrogenation HDN[ ]
Oxidative dehydrogenation ODH[ ]
2H S
[ ]
hydrogenation
Direct desulfurization
110C
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F(Fresh)S(Spent)
( – C).Carbolite
K
Gemni
C torr
FS
F C
S
S
C( – C)Janat
( ; ; ; )M
ml
C
Sciences SeriesTishreen University Journal. Bas
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(0.1) 400SNAc H
SNAcMH C
TG-DTA
FS
LabsysSatarm
– C
C/min
( fresh, F)
(spent, S)
b (a)
d (c)
0
50
100
150
200
250
300
0 0.2 0.4 0.6 0.8 1
P/P0
V C
m3 /g
,STP
200 0CF
S
0
50
100
150
200
250
300
0 0.2 0.4 0.6 0.8 1
P/P0
V C
m3 /g
,STP
F
S
4000C
0
50
100
150
200
250
300
0 0.2 0.4 0.6 0.8 1
P/P0
V C
m3 /g
,STP
500 0C
F
S
0
50
100
150
200
250
300
0 0.2 0.4 0.6 0.8 1
P/P0
V C
m3/g
,ST
P
300 0C F
S
110C
١٥٢
(f) (e)
(IV)(Sing)[ ]S F
( < r ≤ nm)r
S F
(Brunauer, Emmett, Teller)BET[ ]
pr
32
( ) 10p
p
BET
Vr nm
S
pV
DR[ ]
200( ) ( ) ( )
PLog V Log V D Log
P
( )
0 %p
V
V,nmr2, /BETS m g
F
F
F
F
F
0
10
20
30
40
50
60
0 0.2 0.4 0.6 0.8 1
P/P0
V C
m3 /g
,STP
800 0C F
S
0
50
100
150
200
250
300
0 0.2 0.4 0.6 0.8 1
P/P0
V C
m3 /g
,STP
600 0C
F
S
Sciences SeriesTishreen University Journal. Bas
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F
( )
0 %p
V
V,nmr2, /BETS m g
S
S
S
S
S
S
a (b)
11
12
13
14
15
16
17
18
0 200 400 600 800
temperature oC
Vo/V
p %
F
S
(c)a
b
c0 %p
V
V
0
20
40
60
80
100
120
140
160
180
200
0 200 400 600 800
Temperature oC
SB
ET
m2 /g
F
S
4
5
6
7
0 200 400 600 800
temperature oC
r p n
m
F
S
110C
١٥٤
-aS
C C m /g
TG-DTA
CF
nmS( -b)
( -c)
S C
S
(b)(a)
0
50
100
150
200
250
300
0 0.2 0.4 0.6 0.8 1
P/P0
V C
m3/g
.ST
P
SNAc(0.1)H400
0
50
100
150
200
250
0 0.2 0.4 0.6 0.8 1
P/P0
V C
m3 /g
.STP
SNAc(0.3)H400
0
50
100
150
200
250
0 0.2 0.4 0.6 0.8 1
P/P0
V C
m3/g
.ST
P
SNAc(0.5)H400
0
50
100
150
200
250
0 0.2 0.4 0.6 0.8 1
P/P0
V C
m3 /g
.STP
SNAc(1)H400
Sciences SeriesTishreen University Journal. Bas
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(d)(c)
(f)(e)S
CIV
(a,b,c,d)
eb
Cf C
f
(0.3) 800SNAc H nm
( )
0 / %pV V,pr nm
2, /BETS m g
SNAc( )H
SNAc( )H
SNAc( )H
SNAc( )H
SNAc( )H
SNAc( )
)
0
50
100
150
200
250
0 0.2 0.4 0.6 0.8 1
P/P0
V Cm
3 /g.S
TP
SNAc(0.3)H600
0
5
10
15
20
25
30
35
40
0 0.2 0.4 0.6 0.8 1
P/P0
V C
m3 /g
.STP
SNAc(0.3)H800
110C
١٥٦
S
100
110
120
130
140
150
160
170
180
0 0.2 0.4 0.6 0.8 1 1.2
C,mol/L
SB
ET,m
2/g
m /gM
m /g
nm
M
SNAc( )H
TG-DTA
Sciences SeriesTishreen University Journal. Bas
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(a)
(b)aF
bS
( -a)( C)
C
(
C) C
C( )
( -b)( C)
C
( C) C
( C)
( )
110C
١٥٨
IV
C
C
M
(0.3)400SNAc
S C
Sciences SeriesTishreen University Journal. Bas
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