Effect Of Al2o3, Sio2 And Tio2 On Molybdenum Oxide Supported Catalyst In Ethanol Oxidation Into Acetaldehyde
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Effect of Al2O3, SiO2 and TiO2 on molibdenum oxide supported catalyst in ethanol oxidation into acetaldehyde
Husni Husin Chemical Engineering Department Engineering Faculty Syiah Kuala University Darussalam Banda Aceh Indonesia
Introduction Acetaldehyde: intermediate product raw material: pentaeritrytol and acetic acid production IMPORT ! Reaction : CH≡CH + H2O
2+
CH = CHO H
, H2SO4 ,700−1000 C Ag °C 2 ⎯Hg ⎯⎯ ⎯⎯⎯⎯ ⎯⎯ →,500 ⎯ ⎯⎯ →
CH3CH2OH + ½O2
o
Ag , 500°C ⎯⎯ ⎯⎯→
2+
C2H4O
, H 2 SO4 ,700−1000 C ⎯Hg ⎯⎯ ⎯⎯⎯⎯⎯→
CH3CHO + H2O
T = 300 – 575 oC , P = 1 atm Conventional pocess: petrochemical via X < 72, Y < 95 Catalyst : Silver Very Expensive metal
high cost
o
P = 15 psi
Alternative Route Literature Study 1. Viswanath (1982) Catalyst : Fe/Mo/O T = 200-320˚C E T H A N O L
2. Mc Cabe dan Machiels (1983) - Catalyst: mangane, platinum, dan Copper
Reaction: C2H5OH+½ O2 →C2H4O+H2O
3. Filho dan Domingues (1992 ) - Catalyst : Fe/Mo/O komersial
Ethanol Oxidation over MoO3 based Catalyst
- T: 180-243 0C P: atm 4. Zhang dkk (1995) :
Catalyst and Condition ???
- Catalyst : MoO3 syntetis 5.
Husin dkk,. (2002) - Catalyst Fe2O3.MoO3
-This research is objected to evaluate the Influnce of TiO2, Al2O3, SiO2 on MoO3 catalyst in ethanol oxidation into acetaldehyde
Catalyst Preparation Catalyst Preparation (NH4)6Mo724O2.4H2O
Al2O3, TiO2, SiO2
Impregnation Drying Calsination
Characterization
Catalyst Test MoO3/Al2O3, TiO2, SiO2 Catalyst
Reactor set up Vent
buble soap flowmeter
H2O absorber preheate r thermocople
feed injection
detector reactor catalyst
gas product liquid Product
controller condenser
Methanol
nitrogen
nitrogen
oxigen
Gas mixer
RESULT AND DICCUSSION XRD data 4000
4000
50% MoO3/TiO2
25% MoO3/TiO2 x
3000
2000
Intensity (cps)
Intensity (cps)
3000
t
1000
x
x 1000
x
x t x
t
t t
x
2000
x
t
x x
x
t
0
x t
x
t
t
0
10
20
30 40 50 2 Theta (degree)
60
70
10
20
30 40 50 2 Theta (degree)
Figure 3.a Diffractogram of MoO3/TiO2
60
70
XRD data
25% MoO3/Al2O3 x = MoO3 o = Al2O3
6000
x
5000
5000
I n Inte t 4000 nsit e yn (cp s s)i 3000 t y
I n t 4000 Inte e nsit n ys (cp i 3000 s)t y
x
2000
x o
x o
x
30
x o
x
40
50
2 Theta (degree)
70
x o
xx
o
60
x xx o
x o
1000
x
0 20
x
x x
x
10
x o
2000
x x o
1000
50% MoO3/Al2O3 x = MoO3 o = Al2O3
6000
0
10
20
30
40
50
2 Theta (degree)
Figure 3.b Diffractogram of MoO3/Al2O3
60
70
XRD data 6000
6000 25% MoO3/SiO2 x = MoO3 s = SiO2
5000
5000
4000
I n t 00 e n s 2000 i t y
x s
1000
x s
x
s
10
x
x
30
x s x
x
40 2 Theta (degree)
50
60
x
s
70
0
x
s
x
s 20
x s
1000
x
s 0
x
I4000 n t e 00 n s i t2000 y
x
50% MoO3/SiO2 x = MoO3 s = SiO2
10
x
s
20
30
40
50
2 Theta (degree)
Figure 3.c Diffractogram of MoO3/SiO2
60
70
Catalytic Activity Selektivitas Asetaldehida Yield Asetaldehida 2 5 % M o O3 / TiO2
80 60 40 20 0 125 150 175 200 225 250 275 300 325 T emperature (oC)
Aktivitas (X, S, Y) %
Aktivitas (X, S, dan Y) %
100
Konversi Etanol Selektivitas Asetaldehida
Konversi Etanol Selektivitas Asetaldehida
Yield Asetaldehida
Yield Asetaldehida
100 2 5 % M o O3 / Al2 O3 90 80 70 60 50 40 30 20 10 0 125 150 175 200 225 250 275 300 325 T emperature (oC)
Aktivitas (X, S, Y) %
Konversi Etanol
100 90 80 2 5 % M o O3 /SiO2 70 60 50 40 30 20 10 0 125 150 175 200 225 250 275 300 325 T emperature (oC)
Figure 4. Conversion, Selectivity, and yield for ethanol oxidation at different temperature over 25% MoO3/Al2O3, TiO2, and SiO2
Catalytic Activity 100 90 80 70 60 50 40 30 20 10 0
K o n v ersi E t an o l Selek t iv it as A set aldeh ida Y ield A set aldeh ida
1 0 0 %M o O3
Aktivitas (X, S, Y) %
Aktvitas (X, S, dan Y) %
K o n v ersi E t an o l Selek t iv it as A set aldeh ida Y ield A set aldeh ida
125 150
175 200 225 250
275 300 325
100 90 80 70 60 50 40 30 20 10 0
5 0 % M o O 3 / T iO 2
125 150
T em p erat ur (o C)
Konv ersi Et an ol Selekt iv it as Aset aldeh ida Yield Aset aldehida
5 0 % M o O 3 / A l2 O 3
Aktivitas (X, S, Y) %
Aktivitas (X, S, Y) %
Y ield Aset aldeh ida
125 150 175 200
225 250 275 300 325
T em p erat ure (o C)
275 300 325
T em p erat ure (o C)
K o n v ersi E t an o l Selek t iv it as A set aldeh ida 100 90 80 70 60 50 40 30 20 10 0
175 200 225 250
100 90 80 70 60 50 40 30 20 10 0
5 0 % M o O 3 / S iO 2
12 5 1 50
17 5 2 00
22 5 2 50 275
3 00 325
T em perat ure (o C)
Figure 4. Conversion, Selectivity, and yield for ethanol oxidation at different temperature over 50% MoO3/Al2O3, TiO2, and SiO2
CONCLUSION The catalyst that loading of 50% MoO3 has higher intensity than 25% MoO3 . Both of the conversions and selectivities of MoO3 supported catalyst as a function of molybdenum loading and support. The highest conversion was 83% for the catalyst of 50%MoO3/TiO2, while the highest selectivity of acetaldehyde was 96% for the catalyst of 25%MoO3/SiO2. The highest of acetaldehyde yield was 51% by using MoO3/TiO2 suppoerted catalyst .
Katalis Industri
• Thanks you for your attention!
Husni Husin Chemical Engineering Department Engineering Faculty Syiah Kuala University Darussalam Banda Aceh Indonesia
Introduction Acetaldehyde: intermediate product raw material: pentaeritrytol and acetic acid production IMPORT ! Reaction : CH≡CH + H2O
2+
CH = CHO H
, H2SO4 ,700−1000 C Ag °C 2 ⎯Hg ⎯⎯ ⎯⎯⎯⎯ ⎯⎯ →,500 ⎯ ⎯⎯ →
CH3CH2OH + ½O2
o
Ag , 500°C ⎯⎯ ⎯⎯→
2+
C2H4O
, H 2 SO4 ,700−1000 C ⎯Hg ⎯⎯ ⎯⎯⎯⎯⎯→
CH3CHO + H2O
T = 300 – 575 oC , P = 1 atm Conventional pocess: petrochemical via X < 72, Y < 95 Catalyst : Silver Very Expensive metal
high cost
o
P = 15 psi
Alternative Route Literature Study 1. Viswanath (1982) Catalyst : Fe/Mo/O T = 200-320˚C E T H A N O L
2. Mc Cabe dan Machiels (1983) - Catalyst: mangane, platinum, dan Copper
Reaction: C2H5OH+½ O2 →C2H4O+H2O
3. Filho dan Domingues (1992 ) - Catalyst : Fe/Mo/O komersial
Ethanol Oxidation over MoO3 based Catalyst
- T: 180-243 0C P: atm 4. Zhang dkk (1995) :
Catalyst and Condition ???
- Catalyst : MoO3 syntetis 5.
Husin dkk,. (2002) - Catalyst Fe2O3.MoO3
-This research is objected to evaluate the Influnce of TiO2, Al2O3, SiO2 on MoO3 catalyst in ethanol oxidation into acetaldehyde
Catalyst Preparation Catalyst Preparation (NH4)6Mo724O2.4H2O
Al2O3, TiO2, SiO2
Impregnation Drying Calsination
Characterization
Catalyst Test MoO3/Al2O3, TiO2, SiO2 Catalyst
Reactor set up Vent
buble soap flowmeter
H2O absorber preheate r thermocople
feed injection
detector reactor catalyst
gas product liquid Product
controller condenser
Methanol
nitrogen
nitrogen
oxigen
Gas mixer
RESULT AND DICCUSSION XRD data 4000
4000
50% MoO3/TiO2
25% MoO3/TiO2 x
3000
2000
Intensity (cps)
Intensity (cps)
3000
t
1000
x
x 1000
x
x t x
t
t t
x
2000
x
t
x x
x
t
0
x t
x
t
t
0
10
20
30 40 50 2 Theta (degree)
60
70
10
20
30 40 50 2 Theta (degree)
Figure 3.a Diffractogram of MoO3/TiO2
60
70
XRD data
25% MoO3/Al2O3 x = MoO3 o = Al2O3
6000
x
5000
5000
I n Inte t 4000 nsit e yn (cp s s)i 3000 t y
I n t 4000 Inte e nsit n ys (cp i 3000 s)t y
x
2000
x o
x o
x
30
x o
x
40
50
2 Theta (degree)
70
x o
xx
o
60
x xx o
x o
1000
x
0 20
x
x x
x
10
x o
2000
x x o
1000
50% MoO3/Al2O3 x = MoO3 o = Al2O3
6000
0
10
20
30
40
50
2 Theta (degree)
Figure 3.b Diffractogram of MoO3/Al2O3
60
70
XRD data 6000
6000 25% MoO3/SiO2 x = MoO3 s = SiO2
5000
5000
4000
I n t 00 e n s 2000 i t y
x s
1000
x s
x
s
10
x
x
30
x s x
x
40 2 Theta (degree)
50
60
x
s
70
0
x
s
x
s 20
x s
1000
x
s 0
x
I4000 n t e 00 n s i t2000 y
x
50% MoO3/SiO2 x = MoO3 s = SiO2
10
x
s
20
30
40
50
2 Theta (degree)
Figure 3.c Diffractogram of MoO3/SiO2
60
70
Catalytic Activity Selektivitas Asetaldehida Yield Asetaldehida 2 5 % M o O3 / TiO2
80 60 40 20 0 125 150 175 200 225 250 275 300 325 T emperature (oC)
Aktivitas (X, S, Y) %
Aktivitas (X, S, dan Y) %
100
Konversi Etanol Selektivitas Asetaldehida
Konversi Etanol Selektivitas Asetaldehida
Yield Asetaldehida
Yield Asetaldehida
100 2 5 % M o O3 / Al2 O3 90 80 70 60 50 40 30 20 10 0 125 150 175 200 225 250 275 300 325 T emperature (oC)
Aktivitas (X, S, Y) %
Konversi Etanol
100 90 80 2 5 % M o O3 /SiO2 70 60 50 40 30 20 10 0 125 150 175 200 225 250 275 300 325 T emperature (oC)
Figure 4. Conversion, Selectivity, and yield for ethanol oxidation at different temperature over 25% MoO3/Al2O3, TiO2, and SiO2
Catalytic Activity 100 90 80 70 60 50 40 30 20 10 0
K o n v ersi E t an o l Selek t iv it as A set aldeh ida Y ield A set aldeh ida
1 0 0 %M o O3
Aktivitas (X, S, Y) %
Aktvitas (X, S, dan Y) %
K o n v ersi E t an o l Selek t iv it as A set aldeh ida Y ield A set aldeh ida
125 150
175 200 225 250
275 300 325
100 90 80 70 60 50 40 30 20 10 0
5 0 % M o O 3 / T iO 2
125 150
T em p erat ur (o C)
Konv ersi Et an ol Selekt iv it as Aset aldeh ida Yield Aset aldehida
5 0 % M o O 3 / A l2 O 3
Aktivitas (X, S, Y) %
Aktivitas (X, S, Y) %
Y ield Aset aldeh ida
125 150 175 200
225 250 275 300 325
T em p erat ure (o C)
275 300 325
T em p erat ure (o C)
K o n v ersi E t an o l Selek t iv it as A set aldeh ida 100 90 80 70 60 50 40 30 20 10 0
175 200 225 250
100 90 80 70 60 50 40 30 20 10 0
5 0 % M o O 3 / S iO 2
12 5 1 50
17 5 2 00
22 5 2 50 275
3 00 325
T em perat ure (o C)
Figure 4. Conversion, Selectivity, and yield for ethanol oxidation at different temperature over 50% MoO3/Al2O3, TiO2, and SiO2
CONCLUSION The catalyst that loading of 50% MoO3 has higher intensity than 25% MoO3 . Both of the conversions and selectivities of MoO3 supported catalyst as a function of molybdenum loading and support. The highest conversion was 83% for the catalyst of 50%MoO3/TiO2, while the highest selectivity of acetaldehyde was 96% for the catalyst of 25%MoO3/SiO2. The highest of acetaldehyde yield was 51% by using MoO3/TiO2 suppoerted catalyst .
Katalis Industri
• Thanks you for your attention!
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