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A kind of encapsulated nickel-based catalyst and preparation method thereof

A nickel-based catalyst and wrapped technology, which is applied in the field of wrapped nickel-based catalysts and their preparation, can solve the problems of insufficient hydrothermal stability of Ni-based catalysts, and achieve controllable synthesis process, good hydrothermal stability, and good catalysis active effect

Active Publication Date: 2021-08-31
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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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  • A kind of encapsulated nickel-based catalyst and preparation method thereof
  • A kind of encapsulated nickel-based catalyst and preparation method thereof
  • A kind of encapsulated 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 packaged nickel-based catalyst and a preparation method thereof, belonging to the field of energy and environmental catalysis. The nickel core of the catalyst is composed of alumina and active component nickel, and the shell component is cerium oxide. Among them, the active component nickel content is 30 wt.%, the molar ratio of aluminum to nickel is 0.4-2.5, and the remaining components are cerium oxide. The packaged nickel-based catalyst prepared by the present invention still has high CO2 under the condition of normal pressure and medium temperature (325-450°C) after aging at 800°C. 2 Methanation performance, showing better hydrothermal stability, suitable for high temperature and high humidity environment.

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 greenhouse gas, its emissions have a serious impact on the human living environment and the global climate, so reduce 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 natural gas, which can be tran...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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 UNIV
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