Catalyst for methanation of carbon dioxide, preparation method and usage thereof

Patent metadata

Field	Value
Publication number	US-9388091-B2
Application number	US-201414242816-A
Country	US
Kind code	B2
Filing date	Apr 1, 2014
Priority date	Oct 19, 2011
Publication date	Jul 12, 2016
Grant date	Jul 12, 2016

Abstract

A catalyst for methanation of carbon dioxide. The catalyst is formed by mixing ash from a biomass power plant with a nickel compound and calcining the resulting mixture. The catalyst formed by calcination includes between 2 and 20 wt. % of nickel.

First claim

The invention claimed is:

1. A catalyst for methanation of carbon dioxide, the catalyst being formed by mixing ash from a biomass power plant with a nickel compound and calcining a resulting mixture, the catalyst comprising between 2 and 20 wt. % of nickel supported on a second ash;
wherein:
the ash from the biomass power plant and the second ash comprise SiO 2 , Al 2 O 3 , CaO, Fe 2 O 3 ,TiO 2 , MgO, and K 2 O; and
the catalyst is prepared according to a method comprising:
1) preparing an aqueous solution comprising between 5 and 30 wt. % of the nickel compound;
2) calcining the ash at a temperature of between 300 and 400° C. for between 20 and 40 min for removing combustible impurities from the ash to obtain a second ash;
3) mixing the aqueous solution obtained in 1) with the second ash, and stiffing a resulting mixture for between 5 and 10 h for uniformly impregnating the mixture;
4) desiccating the mixture obtained in 3) at a temperature of between 110 and 150° C. for between 0.5 and 1.5 h; and
5) calcining the mixture obtained in 4) at a temperature of between 400 and 500° C. for between 3 and 6 h to yield the catalyst.

2. The catalyst of claim 1 , wherein the catalyst comprises between 5 and 15 wt. % of nickel.

3. The catalyst of claim 1 , wherein the catalyst comprises between 10 and 20 wt. % of nickel.

4. The catalyst of claim 1 , wherein the nickel compound is selected from the group consisting of nickel nitrate, nickel oxalate, nickel formate, nickel acetate, nickel citrate, nickel tartrate, and a mixture thereof.

5. The catalyst of claim 1 , wherein the ash from the biomass power plant is collected in a bag dust collector and has an average particle size of between 10 and 15 μm.

6. The catalyst of claim 4 , wherein the average particle size of the ash from the biomass power plant is between 10 and 15 μm.

7. The catalyst of claim 1 , wherein a particle size of the catalyst is between 40 and 60 mesh.

8. The catalyst of claim 1 , wherein:
a calcination time in 2) is controlled for between 25 and 30 min;
a stirring time in 3) is controlled for between 6 and 8 h;
a desiccation time in 4) is controlled for between 0.5 and 1.0 h; and
a calcination time in 5) is controlled for between 4 and 5 h.

9. A catalyst for methanation of carbon dioxide, the catalyst comprising between 2 and 20 wt. % of nickel supported on ash from combusting biomass, wherein said ash comprises SiO 2 , Al 2 O 3 , CaO, Fe 2 O 3 , TiO 2 , MgO, and K 2 O.

Assignees

• Wuhan Kaidi Eng Tech Res Inst

Inventors

• Wang Zhilong
• Zhang Yanfeng
• Chen Yilong
• Xue Yongjie
• Tao Leiming
• Luo Zhixiang
• Zheng Xingcai

Classifications

• C07C2523/755

  Nickel · CPC title

• B01J23/755

  Nickel · CPC title

• B01J37/04

  Mixing {(B01J37/0009, B01J37/0018 take precedence)} · CPC title

• B01J37/082

  Decomposition and pyrolysis · CPC title

• C07C1/12 Primary

  from carbon dioxide with hydrogen · CPC title