Supported uniform nickel-cobalt (Ni-Co) alloy catalyst and preparation method thereof

A technology of alloy catalyst and nickel-cobalt alloy, which is applied in the field of supported uniform nickel-cobalt alloy catalyst and its preparation, can solve the problems of affecting catalytic performance, uneven composition, coexistence of multi-phase alloys, etc., and achieve good catalytic activity and uniform composition Effect

Inactive Publication Date: 2018-08-10
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most of the supported alloy catalysts that have been reported so far are prepared by the impregnation method. The main problems are the coexistence of multi-phase alloys, uneven composition, large particle size and wide distribution, and the interaction between the metal and the support. Weaker, etc., which seriously affect the catalytic performance

Method used

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  • Supported uniform nickel-cobalt (Ni-Co) alloy catalyst and preparation method thereof
  • Supported uniform nickel-cobalt (Ni-Co) alloy catalyst and preparation method thereof
  • Supported uniform nickel-cobalt (Ni-Co) alloy catalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Accurately weigh 40 g of flaky NaOH solid, dissolve it in 500 mL of deionized water, stir for 10 minutes, and prepare a 2mol / L NaOH aqueous solution for use. According to the (Ni+Co+Mg):Al molar ratio of 3:1 and Ni:Co molar ratio of 3:1, weigh 1.3378gNi(NO 3 ) 2 ·6H 2 O, 0.4445g Co(NO 3 ) 2 ·6H 2 O, 10.8974g Mg(NO 3 ) 2 ·6H 2 O and 6.0846g Al(NO 3 ) 3 ·9H 2 O was dissolved in 100 mL of deionized water and stirred for 10 minutes to completely dissolve the nitrate to obtain a mixed solution. Press Na 2 CO 3 The molar amount is Al(NO 3 ) 3 ·9H 2 0.5 times the molar amount of O to weigh anhydrous Na 2 CO 3 X 0.8596g, dissolved in 100mL deionized water, as the bottom liquid. The mixed solution of nickel, cobalt, magnesium and aluminum was dripped into Na containing Na with a constant pressure funnel at a rate of 30 drops / min. 2 CO 3 Place the solution in a beaker and stir constantly. At the same time, use a peristaltic pump to slowly drip the NaOH solution of the precipitant ...

Embodiment 2

[0031] The process of Example 1 was repeated for the preparation of NaOH aqueous solution. Then press (Ni+Co+Mg):Al molar ratio 3:1 and Co:Ni molar ratio 1:1, and weigh 0.8919g Ni(NO 3 ) 2 ·6H 2 O, 0.8890g Co(NO 3 ) 2 ·6H 2 O, 10.8974g Mg(NO 3 ) 2 ·6H 2 O and 6.0846g Al(NO 3 ) 3 ·9H 2 O was dissolved in 100 mL of deionized water and stirred for 10 minutes to completely dissolve the nitrate to obtain a mixed solution. Press Na 2 CO 3 The molar amount is Al(NO 3 ) 3 ·9H 2 0.5 times the molar amount of O to weigh anhydrous Na 2 CO 3 X0.8596g, dissolved in 100mL deionized water, as the bottom liquid. The mixed solution of nickel, cobalt, magnesium and aluminum was dripped into Na containing Na with a constant pressure funnel at a rate of 30 drops / min. 2 CO 3 Place the solution in a beaker and stir constantly. At the same time, use a peristaltic pump to slowly drip the NaOH solution of the precipitant into the beaker at a rate of 35 drops / min. During the dripping process, keep the s...

Embodiment 3

[0033] The process of Example 1 was repeated for the preparation of NaOH aqueous solution. Then according to the molar ratio of (Ni+Co+Mg):Al 3:1 and Ni:Co molar ratio 1:3, weigh 0.4459g Ni(NO 3 ) 2 ·6H 2 O, 1.3334g Co(NO 3 ) 2 ·6H 2 O, 10.8974g Mg(NO 3 ) 2 ·6H 2 O and 6.0846g Al(NO 3 ) 3 ·9H 2 O was dissolved in 100 mL of deionized water and stirred for 10 minutes to completely dissolve the nitrate to obtain a mixed solution. Press Na 2 CO 3 The molar amount is Al(NO 3 ) 3 ·9H 2 0.5 times the molar amount of O to weigh anhydrous Na 2 CO 3 X0.8596g, dissolved in 100mL deionized water, as the bottom liquid. The mixed solution of nickel, cobalt, magnesium and aluminum was dripped into Na containing Na with a constant pressure funnel at a rate of 30 drops / min. 2 CO 3 Place the solution in a beaker and stir constantly. At the same time, use a peristaltic pump to slowly drip the NaOH solution of the precipitant into the beaker at a rate of 35 drops / min. During the dripping process, ...

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Abstract

The invention belongs to the field of catalysts for the preparation of synthesis gas by reforming hydrocarbons, and particularly relates to a supported uniform nickel-cobalt (Ni-Co) alloy catalyst anda preparation method thereof. The catalyst provided by the invention is prepared from the active phase of a Ni-Co alloy nano particle and a high-specific-surface-area Mg(Al)O composite oxide support.The preparation method comprises the following steps of firstly, synthesizing a Ni-Co-Mg-Al LDHs (Layered Double Hydroxides) lamellar composite hydroxide as a precursor by adopting a coprecipitationmethod, afterwards, obtaining a Mg(Ni,Co,Al)O oxide solid solution through roasting treatment, next, reducing through high-temperature hydrogen to in situ generate the Ni-Co alloy nano particle. The Ni-Co alloy nano particle of the supported uniform Ni-Co alloy catalyst is highly dispersed on the surface of the support, and the supported uniform Ni-Co alloy catalyst has the characteristics of being single in structure, uniform in composition, small in particle size which is approximately 8nm and high in metal-support interaction, and the like, and shows favorable catalytic activity, stabilityand anti-carbon performance to the reforming reaction of methane and carbon dioxide.

Description

Technical field [0001] The invention relates to the field of catalysts for reforming hydrocarbons to syngas, in particular to a supported uniform nickel-cobalt alloy catalyst and a preparation method thereof. Background technique [0002] Syngas is a mixture of carbon monoxide and hydrogen. It is a very important chemical raw material. Hydrogen can be produced through water gas conversion, or various liquid fuels and chemicals can be produced through Fischer-Tropsch synthesis and methanol synthesis. Hydrocarbon reforming technologies, such as methane steam reforming, methane carbon dioxide reforming, and biomass tar steam reforming, are important ways to produce syngas. Among them, the reforming of methane and carbon dioxide to produce syngas has received extensive attention from academia and industry due to its many advantages. Methane and carbon dioxide are the two main greenhouse gases, as well as the two most abundant carbon-containing resources on the planet. H in the synt...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/755B01J35/02B01J35/10C01B3/40
CPCB01J23/78B01J35/006B01J35/02B01J35/1019B01J35/1038B01J35/1042B01J35/1061C01B3/40C01B2203/0238C01B2203/1241Y02P20/52
Inventor 李达林宋凯施泽敏宛春生许淑萍
Owner FUZHOU UNIV
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