Catalysts and methods for natural gas processes
AssigneeSiluria Technologies, Inc.
InventorsAdrienne Tanur, Ndifreke Ini Usen, Wayne P. Schammel, Yacine Haroun, Erik M. Freer, Joel M. Cizeron
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Abstract
Catalysts and catalytic methods are provided. The catalysts and methods are useful in a variety of catalytic reactions, for example, the oxidative coupling of methane.
Claims35
A catalyst comprising the following formula (IA):
- AxByCvDwOz (IA)
- wherein:
- A is a lanthanide or group 4 element;
- B is a group 2 element;
- C is a group 13 element;
- D is a lanthanide element;
- O is oxygen;
- v and w are independently numbers greater than 0;
- x, y and z are independently numbers greater than 0, and v, w, x, y and z are selected such that AxByCvDwOz has an overall charge of 0.
(canceled)
(canceled)
A method for performing the oxidative coupling of methane, the method comprising flowing a gas comprising methane from a front end to a back end of a catalyst bed comprising an OCM active catalyst, the catalyst bed having a total length L and a total OCM active catalyst surface area, wherein greater than 50% of the total OCM active catalyst surface area resides in a portion of the catalyst bed ranging from the front end to a distance equal to 50% of L.
30-37. (canceled)
A catalyst bed comprising a front end, a back end and an OCM active catalyst, the catalyst bed having a total length L and a total OCM active catalyst surface area, wherein greater than 50% of the total OCM active surface area resides in a portion of the catalyst bed ranging from the front end to a distance equal to 50% of L.
A formed catalytic material comprising first and second OCM active catalysts, wherein the first OCM active catalyst is a nanostructured catalyst having a BET surface area of greater than 5 m2/g, and the second OCM active catalyst is a catalyst having a BET surface area of less than 2 m2/g, and wherein the catalytic material has a volume loss of less than 20% when heated to 900° C. in air for 100 hours.
40-50. (canceled)
A method for preparing a formed catalytic material, the method comprising:
- i) providing a first nanostructured OCM active catalyst having a BET surface area of greater than 5 m2/g;
- ii) sintering the first nanostructured OCM active catalyst at a temperature above 1000° C. to obtain a second OCM active catalyst having a BET surface area of less than 2 m2/g;
- iii) admixing the first and second OCM active catalysts;
- and
- iv) forming the mixture to obtain the formed catalytic material.
52-64. (canceled)
Dependencies are inferred from the claim text.