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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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  • Summary
  • 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, the present invention provides a packaged Ni-based catalyst and a preparation method thereof

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
Effect test

Embodiment 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 was dissolved in 160 mL deionized water. Weigh 3.74 g of NaOH and dissolve in 400 mL of deionized water. The NaOH aqueous solution was added dropwise into the mixed nitrate aqueous solution, and after the dropwise addition was completed, stirring was continued for 1 h, and then placed in a 60 °C oven for hydrothermal reaction for 24 h. The obtained precipitate was centrifuged, washed with deionized water and ethanol, dried under vacuum at 50 °C for 24 h, and calcined at 450 °C for 4 h at a heating rate of 1 °C / min.

[0025] Preparation of NiAl 0.5 @CeO 2 -HT catalyst: Weigh 0.51 g oxidized nickel nucleus NiAl 0.5 O and 1.44 g Ce(NO 3 ) 3 ·6H 2 O was dispersed in 320 mL of 50% ethanol aqueous solution, ultrasonically dispersed for 1 h, and stirred overnight. Weigh 1.08 g of L-arginine and dissolve in 30 mL of deionized wa...

Embodiment 2

[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 was dissolved in 160 mL deionized water. Weigh 4 g of NaOH and dissolve in 400 mL of deionized water. The NaOH aqueous solution was added dropwise into the mixed nitrate aqueous solution, and after the dropwise addition was completed, stirring was continued for 1 h, and then placed in a 60 °C oven for hydrothermal reaction for 24 h. The obtained precipitate was centrifuged, washed with deionized water and ethanol, dried in vacuum at 50 °C for 24 h, and calcined at 450 °C for 4 h at a heating rate of 1 °C / min.

[0027] Preparation of NiAl@CeO 2 -HT catalyst: weigh 0.64 g NiAlO and 1.11 g Ce(NO 3 ) 3 ·6H 2 O was dispersed in 320 mL of 50% ethanol aqueous solution, ultrasonically dispersed for 1 h, and stirred overnight. Weigh 0.83 g of L-arginine and dissolve in 30 mL of deionized water. At room temperature, the L-argin...

Embodiment 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 was dissolved in 160 mL deionized water. Weigh 4.27 g of NaOH and dissolve in 400 mL of deionized water. The NaOH aqueous solution was added dropwise into the mixed nitrate aqueous solution, and after the dropwise addition was completed, stirring was continued for 1 h, and then placed in a 60 °C oven for hydrothermal reaction for 24 h. The obtained precipitate was centrifuged, washed with deionized water and ethanol, dried under vacuum at 50 °C for 24 h, and calcined at 450 °C for 4 h at a heating rate of 1 °C / min.

[0030] Preparation of NiAl 2 @CeO 2 -HT catalyst: Weigh 0.90 g oxidized nickel core NiAl 2 O and 0.45 g Ce(NO 3 ) 3 ·6H 2 O was dispersed in 320 mL of 50% ethanol aqueous solution, ultrasonically dispersed for 1 h, and stirred overnight. Weigh 0.34 g of L-arginine and dissolve in 30 mL of deionized water. At...

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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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