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Carbon dioxide methanation catalyst (Ni/CexZr(1-x)O2) and preparation method thereof

A methanation catalyst and carbon dioxide technology, applied in the field of catalyst preparation, can solve the problems of high cost of catalyst raw materials, complicated preparation methods, low catalytic activity, etc., and achieve the effects of low cost, simple preparation method, high catalytic activity and selectivity

Inactive Publication Date: 2016-02-03
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

According to literature search, the existing carbon dioxide methanation catalyst components and their preparation methods have high raw material cost and cumbersome preparation methods, and the catalysts prepared by this method have low catalytic activity, poor stability and poor selectivity below 350°C.

Method used

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  • Carbon dioxide methanation catalyst (Ni/CexZr(1-x)O2) and preparation method thereof
  • Carbon dioxide methanation catalyst (Ni/CexZr(1-x)O2) and preparation method thereof
  • Carbon dioxide methanation catalyst (Ni/CexZr(1-x)O2) and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] a. Weigh Ce(NO 3 ) 3 ·6H 2 O3.91g, Zr(NO 3 ) 4 ·5H 2 O0.43g, Ni(NO 3 ) 2 ·6H 2 O5.63g, add 50ml of deionized water, stir until dissolved and prepare a mixed solution.

[0023] b. Move the solution to an 80°C water bath, stir continuously, pour 100ml of the prepared 2mol / L ammonium carbonate solution into the above-mentioned mixed solution quickly, continue stirring until it evaporates to dryness, transfer it to a muffle furnace for roasting, and heat it from room temperature at 2°C / L Min heating rate rose to 500 ℃ roasting 5h. , carrier Ce 0.9 Zr 0.1 o 2 The X-ray diffraction pattern of figure 1 As shown in the figure, the oxides of cerium and zirconium form a solid solution Ce 0.9 Zr 0.1 o 2 ..

[0024] c. Put the calcined powder at 25~35kN / Cm 2 It is extruded in a steel mold under a certain pressure; then crushed and sieved to obtain particles with a particle size of 40-60 mesh.

[0025] d. The obtained particles were washed with H at a flow rate ...

Embodiment 2

[0036] a. Weigh Ce(NO 3 ) 3 ·6H 2 O2.17g, Zr(NO 3 ) 4 ·5H 2 O2.15g, Ni(NO 3 ) 2 ·6H 2 Add 50ml of deionized water to O4.98g, stir until dissolved, and prepare a mixed solution.

[0037] b. Move the prepared solution to a water bath at 80°C, stir continuously, quickly pour 100ml of 2mol / L ammonium carbonate solution into the above mixed solution, continue stirring until evaporated to dryness, transfer to a muffle furnace for roasting, from room temperature to 2°C / min heating rate increased to 500 ℃ roasting 5h to obtain powder, carrier Ce 0.5 Zr 0.5 o 2 The X-ray diffraction pattern of figure 1 As shown in the figure, the oxides of cerium and zirconium form a solid solution Ce 0.5 Zr 0.5 o 2 ..

[0038] c. Put the roasted powder at 25~35kN / Cm 2 It is extruded in a steel mold under a certain pressure; then crushed and sieved to obtain particles with a particle size of 40-60 mesh.

[0039] d. The obtained particles were washed with H at a flow rate of 30ml / mi...

Embodiment 3

[0042] a. Weigh Ce(NO 3 ) 3 ·6H 2 O3.91g, Zr(NO 3 ) 4 ·5H 2 O0.43g, 3.51gNi(NO 3 ) 2 ·6H 2 Add 50ml of deionized water to O, and stir until dissolved to form a mixed solution.

[0043] b. Move the solution to an 80°C water bath, stir continuously, quickly pour 100ml of 2mol / L ammonium carbonate solution into the above mixed solution, continue stirring until it is evaporated to dryness, transfer to a muffle furnace for roasting, and start from room temperature at a temperature of 2°C / min. The heating rate was increased to 500 ° C for 5 h, and the carrier Ce 0.9 Zr 0.1 o 2 The X-ray diffraction pattern of figure 1 As shown in the figure, the oxides of cerium and zirconium form a solid solution Ce 0.9 Zr 0.1 o 2 .

[0044] c. Put the calcined powder at 25~35kN / Cm 2 It is extruded in a steel mold under a certain pressure; then crushed and sieved to obtain particles with a particle size of 40-60 mesh.

[0045] d. The obtained particles were washed with H at a fl...

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Abstract

The invention discloses a carbon dioxide methanation catalyst (Ni / CexZr(1-x)O2) and a preparation method thereof. The preparation method comprises the following steps: (a) adding a certain amount of nickel nitrate, a certain amount of cerium nitrate and a certain amount of zirconium nitrate into 50ml of deionized water to prepare a mixed solution with the content of Ni being 10-40wt.% in the catalyst (Ni / CexZr(1-x)O2); (b) transferring the prepared mixed solution into a thermostat water bath pan at 80 DEG C, uniformly stirring, quickly pouring a 100ml of2 mol / Lsal volatile solution into the mixed solution, stirring, heating, drying at a constant temperature, and then acquiring the powder; (c) roasting the powder after being dried for 5h in a muffle furnace by increasing the room temperature to 500 DEG C at a heating rate of 2 DEG C / min, and then putting the powder after being roasted into a steel moldfor extruding and forming, breaking and sieving, thereby acquiring the grains with the grain sizes being 40-60 meshes; and(d) reducing for 2h at the temperature being 400 DEG C in a hydrogen atmosphere, thereby acquiring the Ni / CexZr(1-x)O2 catalyst. The catalyst prepared by adopting the preparation method has relatively high catalytic activity, selectivity and stability at 250-400 DEG C. The preparation method is simple, easy to operate and low in cost.

Description

technical field [0001] The invention discloses a carbon dioxide methanation catalyst (Ni / Ce x Zr 1-x o 2 ) and a preparation method thereof, which belong to the technical field of catalyst preparation. Background technique [0002] In 1902, French chemist Paul Sabatier first reported the catalytic hydrogenation reduction technology of carbon dioxide (ie, CO 2 methanation reaction): CO 2 (g)+4H 2 (g)=CH 4 (g)+2H 2 O(g)△H 0 298K=-252.9KJ.mol -1 , CO 2 The methanation reaction is CO 2 An important chemical reaction for resource utilization, to solve the depletion of natural gas reserves and CO 2 The resulting ecological and environmental issues are of great significance. Catalyzed to CO 2 Rapid methanation has become one of the most attractive topics in carbon-chemistry research. [0003] In the current CO 2 In the research of hydromethanation reaction, the development of catalyst is a hot spot. Scholars at home and abroad have carried out a lot of research, RSC...

Claims

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Application Information

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IPC IPC(8): B01J23/755
Inventor 尚兴付汪学广聂望欣邓蒂固丁伟中
Owner SHANGHAI UNIV
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