# US 11,890,597 B2 · Catalyst composition for different reforming techniques

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- Number: US 11,890,597 B2
- Document ID: US11890597B2
- Status: Granted
- Kind: B2
- Application number: 16/765,924
- Filed: 2018-11-20
- Published: 2020-11-12
- Granted: 2024-02-06
- Earliest claimed: 2017-11-22
- Assignees: Council of Scientific and Industrial Research
- Applicants: Council of Scientific & Industrial Research
- Inventors: Thirumalaiswamy Raja; Veera Venkata Satyanarayana Chilukuri; Vipul Subhash Patil; Siva Prasad Mekala; Ashok Kumar Venugopal
- Web page: https://patentgrep.com/patent/US11890597B2

## CPC

- B01J 23/866: {Nickel and chromium}
- B01J 35/30: characterised by their physical properties
- B01J 35/612: {less than 10 m2/g}
- B01J 35/613: {10-100 m2/g}
- B01J 35/633: {less than 0.5 ml/g}
- B01J 35/643: {less than 2 nm}
- B01J 35/647: {2-50 nm}
- B01J 35/70: characterised by their crystalline properties, e.g. semi-crystalline (catalysts comprising carbon B01J21/18; molecular sieves B01J29/00)
- C01B 3/40: characterised by the catalyst
- B01J 37/036: {to form a gel or a cogel}
- B01J 37/08: Heat treatment {(B01J37/0009, B01J37/0018 take precedence)}
- B01J 2235/15: X-ray diffraction
- B01J 2235/30: Scanning electron microscopy; Transmission electron microscopy
- C01B 2203/0233: the reforming step being a steam reforming step
- C01B 2203/0238: the reforming step being a carbon dioxide reforming step
- C01B 2203/0244: the reforming step being an autothermal reforming step, e.g. secondary reforming processes
- C01B 2203/0261: containing a catalytic partial oxidation step [CPO]
- C01B 2203/1047: Group VIII metal catalysts
- C01B 2203/1058: Nickel catalysts
- Y02P 20/52: using catalysts, e.g. selective catalysts
- B01J: CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- C01B: NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; {METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C}
- Y02P: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS

## Abstract

The present invention provides a catalyst composition comprising different metal oxides wherein the catalyst composition comprising Ce, Cr and Ni oxides and a process for preparation thereof. The catalyst composition is used for different reforming techniques for the production of syn gas (CO+H2) at the same time this material can be used in fuel cell as a anode for power generation as this synthesized material is having good thermal stability and can sustain various redox reaction cycles also.

## Claims

### Claim 1

A process for preparation of a catalyst composition consisting of metal oxides of Ce, Cr and Ni, said process consisting of:
a. dissolving nitrate precursors consisting of Cr, Ce and Ni in a solvent to obtain a solution of metal nitrate precursors;
b. dissolving citric acid in the solvent to obtain a solution of citric acid, wherein citric acid is taken in 3:1 molar ratio of the solution of metal nitrate precursors of step (a);
c. adding the solution of metal nitrate precursors of step (a) into the solution of citric acid of step (b) followed by heating at a temperature ranging from 100° C. to 190° C. until evaporation of the solvent to form a gel; and
d. keeping the gel of step (c) in an oven at a temperature ranging from 100° C. to 190° C. for 24 to 25 hours to form a catalyst material followed by crushing the catalyst material to form a powder; and
e. keeping the powder in a furnace at 800° C. to obtain the catalyst composition,
wherein the nitrate precursors consists of chromium nitrate, cerium nitrate, and nickel nitrate, and
wherein the process is carried out in absence of noble metals.

### Claim 2 (depends on 1)

The process as claimed in claim 1, wherein the solvent is water.

### Claim 3 (depends on 1)

A catalyst composition prepared by the process as claimed in claim 1, said composition consisting of:
(a) 1-50% w/w of Ce oxide;
(b) 20-49% w/w of Cr oxide; and
(c) 1-60% w/w of Ni oxide,
wherein the catalyst composition is recyclable and stable up to 800° C., and wherein the catalyst composition is stable up to 1400° C. after sintering.

### Claim 4 (depends on 3)

The catalyst composition as claimed in claim 3, wherein the catalyst composition is characterised with a conversion of around 80-85% of methane and around 85-90% of carbon dioxide at 800° C.

### Claim 5 (depends on 3)

The catalyst composition as claimed in claim 3, wherein the catalyst composition is further characterised with a 100% conversion of methane to syn gas in an hour and remain same for 13-14 hours by steam reforming of methane.

### Claim 6 (depends on 3)

The catalyst composition as claimed in claim 3, wherein the catalyst composition is characterised with a 99% conversion of methane to syngas and remain same for more than 12 hours by oxidative steam reforming of methane in absence of a noble gas.