Catalysts for petrochemical catalysis

Patent metadata

Field	Value
Publication number	US-10308565-B2
Application number	US-201715647806-A
Country	US
Kind code	B2
Filing date	Jul 12, 2017
Priority date	Mar 15, 2013
Publication date	Jun 4, 2019
Grant date	Jun 4, 2019

Abstract

Metal oxide catalysts comprising various dopants are provided. The catalysts are useful as heterogenous catalysts in a variety of catalytic reactions, for example, the oxidative coupling of methane to C2 hydrocarbons such as ethane and ethylene. Related methods for use and manufacture of the same are also disclosed.

First claim

The invention claimed is:

1. A method for the oxidative coupling of methane, the method comprising contacting methane with a catalyst at temperatures ranging from about 550° C. to about 750° C., thereby converting the methane to C2 hydrocarbons at a methane conversion of greater than 20% and a C2 selectivity of greater than 50%, wherein the catalyst comprises the following formula:
ABO 3 ;
wherein:
A is an element from the lanthanides or groups 2, 3 or 4 of the periodic table;
B is an element from groups 4, 12 or 13 of the periodic table or Ce, Eu, Gd, Tb or Ho; and
O is oxygen,
the catalyst further comprising one or more dopant from any one of groups 2 or 3, and provided that A and B are not the same.

2. The method of claim 1 , wherein the method produces a product gas comprising less than 0.5% carbon monoxide.

3. The method of claim 1 , wherein A is from groups 2, 3 or 4.

4. The method of claim 1 , wherein A is Ce, Pr, Sr, Ca, Mg, Y, Zr or Ba.

5. The method of claim 1 , wherein B is from group 4.

6. The method of claim 1 , wherein B is Zr or Hf.

7. The method of claim 1 , wherein the dopant is Sr, Mg or Ca.

8. The method of claim 1 , wherein the catalyst comprises one of the following formulas: Y/SrZrO 3 , SrHfO 3 , SrZrO 3 , Mg/SrHfO 3 , CaHfO 3 or SrTbO 3 .

9. The method of claim 1 , wherein the catalyst is a bulk catalyst.

10. The method of claim 1 , wherein the catalyst is a nanostructured catalyst.

11. The method of claim 10 , wherein the catalyst is a nanowire.

Assignees

• Siluria Technologies Inc
• Silura Tech Inc

Inventors

• Schammel Wayne P
• Rumplecker Anja
• Cizeron Joel M
• Scher Erik C
• Zurcher Fabio R
• Nyce Greg
• Mccormick Jarod
• Alcid Marian
• Gamoras Joel
• Rosenberg Daniel
• Ras Erik-Jan

Classifications

• C07C2/78

  Processes with partial combustion · CPC title

• C07C2523/02

  of the alkali- or alkaline earth metals or beryllium · CPC title

• C07C2523/10

  of rare earths · CPC title

• B01J37/084

  Decomposition of carbon-containing compounds into carbon · CPC title

• B01J2523/24

  Strontium · CPC title