Catalyst comprising a molecular sieve belonging to the ABC-6 framework family with disorder in the ABC stacking sequence and use of the catalyst

Patent metadata

Field	Value
Publication number	US-10933408-B2
Application number	US-201716335345-A
Country	US
Kind code	B2
Filing date	Nov 2, 2017
Priority date	Nov 10, 2016
Publication date	Mar 2, 2021
Grant date	Mar 2, 2021

Abstract

Catalyst and use of the catalyst comprising a molecular sieve belonging to the ABC-6 framework family with disorder in the ABC stacking sequence essentially composed of double-six-ring periodic building units and having a mole ratio of silicon oxide to aluminum oxide from about 8 to about 60.

First claim

The invention claimed is:

1. Catalyst for heterogeneous catalytic conversion reactions, comprising a molecular sieve belonging to the ABC-6 framework family with disorder in the ABC stacking sequence essentially composed of double-six-ring periodic building units and having a mole ratio of silicon oxide to aluminum oxide from about 8 to about 60,
wherein the molecular sieve belongs to the disordered CHA-GME series, and
wherein the calcined form of the molecular sieve has a powder X-ray diffraction pattern collected in Bragg-Brentano geometry with a variable divergence slit using Cu K-alpha radiation essentially as shown in the following table:

Relative

2-Theta (°)
d-spacing (Å)
peak area
Peak character

7.45-7.54
11.85-11.72
W-M
Broad to sharp

9.55-9.65
9.24-9.15
VS-W
Sharp to broad

11.40-11.66
7.75-7.58
W-M
Broad to sharp

12.90-13.04
6.85-6.78
VS-M
Sharp

14.07-14.21
6.29-6.23
W
Sharp to broad

14.89-15.12
5.94-5.85
W
Broad to sharp

16.08-16.27
5.50-5.44
VS-W
Sharp to broad

17.17-17.34
5.16-5.11
W-S
Broad to sharp

17.71-18.00
5.00-4.92
VS-M
Sharp

where the relative areas of the observed peaks in the 2-Theta range 7-19 degrees are shown according to: W=weak: 0-20%; M=medium: 20-40%; S=strong: 40-60% and VS=very strong: 60-100%.

2. The catalyst according to claim 1 , wherein the amount of stacking disorder of the molecular sieve is between 1 and 99%.

3. The catalyst according to claim 1 , wherein crystals of the molecular sieve have a bipyramidal, elongated bipyramidal or capped bipyramidal morphology.

4. The catalyst according to claim 1 , wherein the silica-to-alumina mole ratio of the molecular sieve is between 8 and 40.

5. The catalyst according to claim 1 , wherein the silica-to-alumina mole ratio of the molecular sieve is between 10 and 20.

6. The catalyst according to claim 1 , wherein at least a part of the aluminum and/or silicon of the molecular sieve is substituted by one or more metals selected from the group consisting of: tin, zirconium, titanium, hafnium, germanium, boron, iron, indium and gallium.

7. The catalyst according to claim 1 , wherein the catalyst and/or the molecular sieve further comprises copper and/or iron.

8. A method for the conversion of nitrogen oxides to nitrogen in presence of a reductant comprising the step of contacting the nitrogen oxides and the reductant with the catalyst according to claim 1 .

9. The method of claim 8 , wherein the reductant comprises hydrocarbons and/or ammonia or a precursor thereof.

10. The method of claim 8 , wherein the nitrogen oxides are contained in engine exhaust.

11. The method of claim 8 , wherein the nitrogen oxides are contained in exhaust from a gas turbine.

12. The method of claim 8 , wherein the nitrogen oxides comprise nitrous oxide.

13. A method for the selective oxidation of ammonia to nitrogen comprising the step of contacting the ammonia or a gas comprising the ammonia with the catalyst according to claim 1 .

14. The method of claim 13 , wherein the catalyst is combined with an oxidation functionality or catalyst.

15. The method of claim 13 , wherein the catalyst is arranged downstream of a selective catalytic reduction catalyst and wherein an excess of ammonia is used to reduce nitrogen oxides.

16. A method for the simultaneous oxidation of hydrocarbons and carbon monoxide and the reduction of nitrogen oxides comprising the step of contacting the hydrocarbons, carbon monoxide and the nitrogen oxides with a catalyst according to claim 1 .

17. The method of claim 16 , wherein the catalyst further comprises one or more platinum group metals.

18. A method for the conversion of oxygenates to hydrocarbons comprising the step of contacting the oxygenates with a catalyst according to claim 1 .

19. The method according to claim 18 , wherein the hydrocarbons produced are primarily olefins.

20. A method for partial oxidation of methane to methanol and/or dimethyl ether comprising the step of contacting the methane with a catalyst according to claim 1 .

Assignees

• Umicore Ag & Co Kg

Inventors

• Vennestøm Peter N R
• Lundegaard Lars Fahl
• Jensen Brian

Classifications

• B01J29/763

  CHA-type, e.g. Chabazite, LZ-218 · CPC title

• B01J29/743

  CHA-type, e.g. Chabazite, LZ-218 · CPC title

• B01J37/0018

  Addition of a binding agent or of material, later completely removed among others as result of heat treatment, leaching or washing,(e.g. forming of pores; protective layer, desintegrating by heat) · CPC title

• B01J29/70

  of types characterised by their specific structure not provided for in groups B01J29/08 - B01J29/65 · CPC title

• B01D2255/20761

  Copper · CPC title