Coated nickel-based catalyst and preparation method thereof

A nickel-based catalyst and encapsulated technology are applied in the field of encapsulated nickel-based catalysts and their preparation, which can solve the problems of insufficient hydrothermal stability of the Ni-based catalyst, and achieve the effects of controllable synthesis process and small grain size.

Active Publication Date: 2020-05-08
FUZHOU UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Aiming at the problem of insufficient hydrothermal stability of Ni-based catalysts,

Method used

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  • Coated nickel-based catalyst and preparation method thereof
  • Coated nickel-based catalyst and preparation method thereof
  • Coated nickel-based catalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
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Example Embodiment

[0023] Example 1

[0024] Preparation of oxidized nickel core NiAl 0.5 O: Weigh 1.32 g PEG(M W =20,000), 7.76 g Ni(NO 3 ) 2 ·6H 2 O and 5.00 g Al(NO 3 ) 3 ·9H 2 O is dissolved in 160 mL deionized water. Weigh 3.74 g of NaOH and dissolve it in 400 mL of deionized water. Drop the NaOH aqueous solution into the mixed nitrate aqueous solution, continue to stir for 1 h after the addition is complete, and place it in a 60 ℃ oven for hydrothermal reaction for 24 h. The resulting precipitate was centrifuged, washed with deionized water and ethanol, dried in vacuum at 50 ℃ for 24 h, and calcined at 450 ℃ for 4 h at a heating rate of 1 ℃ / min.

[0025] Preparation of NiAl 0.5 @CeO 2 -HT catalyst: weigh 0.51 g of oxidation state nickel core NiAl 0.5 O and 1.44 g Ce(NO 3 ) 3 ·6H 2 Disperse O in 320 mL of 50% ethanol aqueous solution for 1 h and stir overnight. Weigh 1.08 g of L-arginine and dissolve it in 30 mL of deionized water. At room temperature, drop the L-arginine aqueous solution int...

Example Embodiment

[0026] Example 2 Preparation of oxidized nickel core NiAlO: Weigh 1.32 g PEG(M W =20,000), 5.82 g Ni(NO 3 ) 2 ·6H 2 O and 7.50 g Al(NO 3 ) 3 ·9H 2 O is dissolved in 160 mL deionized water. Weigh 4 g of NaOH and dissolve it in 400 mL of deionized water. Drop the NaOH aqueous solution into the mixed nitrate aqueous solution, continue to stir for 1 h after the addition is complete, and place it in a 60 ℃ oven for hydrothermal reaction for 24 h. The resulting precipitate was centrifuged, washed with deionized water and ethanol, dried in vacuum at 50 ℃ for 24 h, and calcined at 450 ℃ for 4 h at a heating rate of 1 ℃ / min.

[0027] Preparation of NiAl@CeO 2 -HT catalyst: Weigh 0.64 g of oxidation state nickel core NiAlO and 1.11 g Ce(NO 3 ) 3 ·6H 2 Disperse O in 320 mL of 50% ethanol aqueous solution for 1 h and stir overnight. Weigh 0.83 g of L-arginine and dissolve it in 30 mL of deionized water. At room temperature, the L-arginine aqueous solution was dropped into the ethanol water...

Example Embodiment

[0028] Example 3

[0029] Preparation of oxidized nickel core NiAl 2 O: Weigh 1.32 g PEG(M W =20,000), 3.88 g Ni(NO 3 ) 2 ·6H 2 O and 10.00 g Al(NO 3 ) 3 ·9H 2 O is dissolved in 160 mL deionized water. Weigh 4.27 g of NaOH and dissolve it in 400 mL of deionized water. Drop the NaOH aqueous solution into the mixed nitrate aqueous solution, continue to stir for 1 h after the addition is complete, and place it in a 60 ℃ oven for hydrothermal reaction for 24 h. The resulting precipitate was centrifuged, washed with deionized water and ethanol, dried in vacuum at 50 ℃ for 24 h, and calcined at 450 ℃ for 4 h at a heating rate of 1 ℃ / min.

[0030] Preparation of NiAl 2 @CeO 2 -HT catalyst: weigh out 0.90 g of oxidation state nickel core NiAl 2 O and 0.45 g Ce(NO 3 ) 3 ·6H 2 Disperse O in 320 mL of 50% ethanol aqueous solution for 1 h and stir overnight. Weigh 0.34 g of L-arginine and dissolve it in 30 mL of deionized water. At room temperature, drop the L-arginine aqueous solution into...

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Abstract

The invention discloses a coated nickel-based catalyst and a preparation method thereof, and belongs to the field of energy and environment catalysis. A nickel core of the catalyst is composed of aluminum oxide and an active component nickel, and a shell component is cerium oxide, wherein the content of the active component nickel is 30 wt.%, the molar ratio of aluminum to nickel is 0.4-2.5, and the The rest of the components is cerium oxide. The coated nickel-based catalyst prepared by the preparation method disclosed by the invention still has high CO2 methanation performance under the conditions of normal pressure and medium temperature (325-450 DEG C) after being subjected to high-temperature aging treatment at 800 DEG C, shows good hydrothermal stability, and can be suitable for high-temperature and high-humidity environments.

Description

technical field [0001] The invention belongs to the field of energy and environmental catalysis, and in particular relates to a packaged nickel-based catalyst and a preparation method thereof. Background technique [0002] CO 2 The amount of emissions is huge. The annual burning of fossil fuels in the world produces about 36 billion tons. As a kind of greenhouse gas, its emissions have a serious impact on the living environment of human beings and the global climate. Therefore, reducing CO 2 Emissions are looming. Currently, the treatment of the generated CO 2 The strategy is mainly for CO 2 Capture and conversion utilization (CCUS) technology. CO 2 As an important member of C1 chemistry, it is a carbon resource that can be developed and utilized. CCUS technology can capture CO 2 Converted into methanol, methane, dimethyl ether and other value-added products to realize carbon cycle. CO 2 The methane produced by the methanation reaction is an important component of na...

Claims

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Application Information

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IPC IPC(8): B01J23/83C07C1/12C07C9/04
CPCB01J23/83C07C1/12C07C9/04
Inventor 詹瑛瑛韩倩倩陈崇启蔡国辉江莉龙
Owner FUZHOU UNIVERSITY
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