Rare earth catalyst

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Product Name：Rare earth catalyst

Cerium-zirconium Mixed Oxide

Molecular formula:：(Ce_xZr_yR_1-x-y)O2, R can be one or more of La,Y, Pr or Nd,

Appearance:  Powder with color varies from yellowish to brown depending on the difference doped elements or different amount of doped elements

Use: Catalyst for cleaning exhaust gases of automotives and motorcycles

Items

specification

High Zr series

High Ce series

main elements %

CeO₂

30-40

47-65

Zr(Hf)O₂

50-60

15-40

doped elements %

Nd₂O₃

0-7

0-7

Pr₆O₁₁

0-7

0-7

La₂O₃

0-5

0-5

Y₂O₃

0-6

0-6

impurity content %

Na₂O

<0.03

<0.03

SiO₂

<0.05

<0.05

Fe₂O₃

<0.03

<0.03

CaO

<0.03

<0.03

Cl^-

<0.01

<0.01

SO₄^2-

<0.03

<0.03

physical properties

SA(Fresh) ㎡/g

70-100

70-100

SA(aged,1000℃/10hr) ㎡/g

>40

>40

SA(aged,1100℃/10hr) ㎡/g

>20

>20

SA(aged,1200℃/10hr) ㎡/g

>5

>5

L.O.I. %

<3

<3

D₅₀ um

Small size 2-5

normal 8-15

Small size 2-5

normal 8-15



                                           Rare earth zirconium mixed oxides supported by alu



Appearance: Powder with color varies from yellowish to brown depending on the difference doped

elements or different amount of doped elements

Use: Catalyst for cleaning exhaust gases of automotives and motorcycles



Items

specification

High Zr series

High Ce series

main elements %

CeO₂

15-20

23.5-37.5

Zr(Hf)O₂

25-30

7.5-20

Al₂O₃

50±1

50±1

doped elements %

Nd₂O₃

0-3.5

0-3.5

Pr₆O₁₁

0-3.5

0-3.5

La₂O₃

0-2.5

0-2.5

Y₂O₃

0-3

0-3

impurity content %

Na₂O

<0.05

<0.05

SiO₂

<0.15

<0.15

Fe₂O₃

<0.05

<0.05

CaO

<0.05

<0.05

Cl^-

<0.05

<0.05

SO₄^2-

<0.1

<0.1

physical properties

SA(Fresh) ㎡/g

150-200

150-200

SA(aged,1000℃/10hr) ㎡/g

>60

>50

L.O.I. %

<3

<3

D₅₀ um

Small size 2-5

normal 8-15

Small size 2-5

normal 8-15

                                                          Rare earth-modified alumina

Molecular formula:：La₂O₃/CeO₂-Al₂O₃

Appearance:  Powder with color varies from white to yellowish depending on the difference doped elements or different amount of doped elements

Use: Catalyst for cleaning exhaust gases of automotives and motorcycles

Item

specification

La modified

Ce modified

main elements %

95-97

95

RE

5±1

physical properties

150-210

100-150

SA(aged,1000℃/10hr) ㎡/g

>60

D₅₀ um

4-7



                                 High surface area Cerium Oxide



Molecular formula: CeO₂

Appearance: Yellowish powder

Use: Diesel engine DOC material; Organic exhaust gas catalytic combustion materials

SCR catalytic material

Molecular formula: (Ce_XTi_YW_1-X-Y)O₂

Appearance: Yellowish powder

Use: Diesel engine SCR catalytic material; Boiler exhaust gas denitration; Organic exhaust gas catalytic combustion

Items		specification
		High Zr series	High Ce series
main elements %	CeO₂	15-20	23.5-37.5
	Zr(Hf)O₂	25-30	7.5-20
	Al₂O₃	50±1	50±1
doped elements %	Nd₂O₃	0-3.5	0-3.5
	Pr₆O₁₁	0-3.5	0-3.5
	La₂O₃	0-2.5	0-2.5
	Y₂O₃	0-3	0-3
impurity content %	Na₂O	<0.05	<0.05
	SiO₂	<0.15	<0.15
	Fe₂O₃	<0.05	<0.05
	CaO	<0.05	<0.05
	Cl^-	<0.05	<0.05
	SO₄^2-	<0.1	<0.1
physical properties	SA(Fresh) ㎡/g	150-200	150-200
	SA(aged,1000℃/10hr) ㎡/g	>60	>50
	L.O.I. %	<3	<3
	D₅₀ um	Small size 2-5 normal 8-15	Small size 2-5 normal 8-15

Item		specification
		La modified	Ce modified
main elements %	95-97	95
	RE	5±1
physical properties	150-210	100-150
	SA(aged,1000℃/10hr) ㎡/g	>60
	D₅₀ um	4-7