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Liaoning Haitai Scientific and Technological Development Co.,Ltd
Marketing office:31-floor 1 unit building No.1 Poly Ray New City, Wanghua District Fushun, Liaoning Province, China. Fctory: No.38 Qingtaizi Road, Shenfu New District, Liaoning Province, China
Post Code:113122 E-mail:sales@chinacatalyst.com
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PGH-10 palladium based catalyst for first-stage hydrogenation of pyroysis gasoline
palladium based catalyst PGH-10 for first-stage hydrogenation of pyroysis gasoline
PGH-10 serials catalysts for first-stage hydrogenation of pyroysis gasoline, composed of noble metal palladium as active component and aluminum oxide as support with adding of various additives, were mainly used in the selective hydrogenation of pyroysis gasoline C6~C7, C6~C8, C5~C9, which were the cracking byproducts in the process of ethylene production.
In order to meet the market demand, PGH-10A, a new brand catalyst for the first-stage hydrogenation of pyroysis gasoline, was developed by liaoning haitai sci-tech development Co.,Ltd at the beginning of this century. PGH-10A made greater improvement in water resistant, anti-arsenic, sulfur-tolerant and hydrogenation stability, etc. It was industrial applied successfully in the petrol devices of Yanshan Petrochemical, Shanghai Petrochemical, Lanzhou Petrochemical.
2. physical and chemical properties
Schedule 1 Comparison of PGH-10 and PGH-10A
|
Item |
PGH-10 |
PGH-10A |
|
Shape |
light brown trefoil extrudates |
light brown trefoil extrudates |
|
Size(mm) |
F2.8~3.0´3~15
|
F2.8~3.0´3~15
|
|
Bulk density (g/ml) |
0.60±0.05 |
0.65±0.05 |
|
Specific surface area (m2/g) |
90±20 |
100±20 |
|
Water absorption (%) |
≥70 |
≥60 |
|
Crushing strength (N/cm) |
³40 |
³60 |
|
active component Pd(%) |
≥0.27 |
≥0.30 |
|
Additive1(%) |
0.8 |
1.1 |
|
Additive2(%) |
0.8 |
1.2 |
The combination of support,active component and additive in PGH-10A was more favorable to pyrolysis gasoline hydrogenation.PGH-10A has not only high chemical stability, high thermal stability and low rate of carbon formation, but also good hydrogenation,anti-water, anti-impurities, anti-high-load performance.
3. Catalyst Use Claims
3.1 Catalyst Process Operating Conditions
|
operating pressure(MPa) |
≥2.4 |
|
inlet temperature (℃) |
inital 30~50，end 90~110 |
|
hydrogen-oil ratio (fresh feed) (V) |
60~120 |
|
space velocity (fresh oil) (h-1） |
≤3.5 |
3.2 Composition of Hydrogenation Raw Oil
3.2.1 Disposal Oil
|
distillate |
C6~ C8、C5~C9 |
|
boiling range (℃) |
50~175 |
|
diene content (gI2/100g.oil) |
≤35 |
|
bromine number(gBr2/100g.oil) |
≤70 |
|
arsenic content(ppb) |
≤20 |
|
gum content (mg/100ml) |
≤10 |
|
inorganic sulfur content (ppm) |
≤3 |
|
water content(ppm) |
≤400 |
3.2.2 Hydrogen
|
purity（v%） |
≥85 |
|
methane |
Balance |
|
CO＋CO2（ppm） |
≤5 |
3.2..3 Hydrogenation Product Index and Catalyst Lifetime
|
hydrogenation Product diene(gI2/100g.oil) |
≤2.5 |
|
catalyst guarantee lifetime |
24months |
|
first run cycle |
≥12months |
4. Comparative Evaluation of PGH-10A with competitive Catalyst
1000 h Comparative evaluation test of PGH-10A and competitive catalyst were carried in 100ml Insulation installation. The details were showed in following:
4.1 Evaluation Device
catalyst bed temperature of the evaluation device which was imported from Xytel companies USA was controlled in three sessions. The temperature difference of insulation bed reactor was < ±0.5 ℃ between inside and outside. Raw materials oil, hydrogen were injected into the pre-heater and mixted. when the temperature of the mixture reached the target temperature,operating parameters were tracking controlled automatically by a computer. The reaction products were isolated after condensation: oil was injected into the product tank, exhaust gas was emptied after measurement and the bromine number and diene value of oil were analysized.
4.2 Conditions of technological Evaluation
|
Operating pressure |
2.8MPa |
|
Inlet temperature |
35～65℃ |
|
Liquid hourly space velocity |
3.5h-1 |
|
Hydrogen-oil ratio |
80:1（Vol） |
4.3 Evaluation Materials
Raw materials oil was the whole distillate oil C5~C9 pyrolysis gasoline and its properties were showed in Table 3.
Schedule 3 properties of Raw materials oil
|
Distillation Range（℃） |
||||||||||
|
The beginning of boiling |
10% |
20% |
30% |
40% |
50% |
60% |
70% |
80% |
90% |
The end of boiling |
|
39 |
58 |
66 |
73 |
79 |
86 |
93 |
104 |
121 |
151 |
172 |
|
Diene value 42.53gI2/100g，bromine number 104.2gBr2/100g |
||||||||||
4.4 Evaluation results
1000 h Comparative evaluation test of PGH-10A and competitive catalyst were carried in 100ml Insulation installation. The result was showed in following:
Figure 1 Comparative evaluation results of the hydrogenation product diene value with time on stream catalyzed by PGH-10A and competitive catalyst
1000 hours operation process(the diene value of raw materials was up to 42.53gI/100g and bromine number to 104.2gBr2/100g) indicated PGH-10A was adapted to low-grade oil and good hydrogenation performance and its catalytic activity was considerable to competitive catalyst in Figure 1. PGH-10A has a good hydrogenation performance and stability.
