Tishreen University Journal for Research and Scientific ... · Hossam Al-rakad *** (Received / / ....

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Tishreen University Journal for Research and Scientific Studies - Basic Sciences Series Vol. ( ) No. ( )

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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


١٥١

(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


١٥٣

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


١٥٥

(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


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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


١٥٩

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110C

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Tishreen University Journal for Research and Scientific ... · Hossam Al-rakad *** (Received / / ....

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