palladium based catalyst PGH-10 for first-stage hydrogenation of pyroysis gasoline.

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 as and as support with adding of , 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 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

trilop extrudates

trilop 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

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 , 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 ()                    30~50,end 90~110

hydrogen-oil ratio (fresh feed) (V)             60~120

(fresh oil) (h-1               ≤3.5

3.2 Composition of Hydrogenation Raw Oil

3.2.1 Disposal Oil

distillate                           C6~ C8C5~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

purityv%                         ≥85

methane                             Balance

COCO2ppm                     ≤5

3.2..3 Hydrogenation ProductIndex and Catalyst Lifetime

hydrogenation Product diene(gI2/100g.oil)       ≤2.5

catalyst lifetime                  24months

first run cycle                            ≥12months

4.1Conditions of technological Evaluation

Operating pressure: 2.8MPa  Inlet temperature:  3565          

Liquid hourly space velocity: 3.5h-1    Hydrogen-oil ratio: 80:1Vol

4.2 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