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Synthesis of Ni/Zn bimetallic oxide catalyst and application of Ni/Zn bimetallic oxide catalyst in oxidative dehydrogenation reaction of n-butane

A bimetallic oxide and oxidative dehydrogenation technology, applied in metal/metal oxide/metal hydroxide catalysts, carbon compound catalysts, physical/chemical process catalysts, etc., can solve the problem of harsh reaction conditions, insufficient reactivity, It is difficult to mobilize active oxygen species and other problems to achieve good activity and stability

Pending Publication Date: 2020-10-20
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The catalysts used in the oxidative dehydrogenation of n-butane were mostly concentrated on supported catalysts such as V-MgO, Ni-Bi, Mo, etc., which showed high olefin selectivity for the oxidative dehydrogenation of butane, but due to the difficulty of mobilizing Active oxygen species in the bulk phase are insufficient in reactivity and require harsh conditions for the reaction

Method used

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  • Synthesis of Ni/Zn bimetallic oxide catalyst and application of Ni/Zn bimetallic oxide catalyst in oxidative dehydrogenation reaction of n-butane
  • Synthesis of Ni/Zn bimetallic oxide catalyst and application of Ni/Zn bimetallic oxide catalyst in oxidative dehydrogenation reaction of n-butane
  • Synthesis of Ni/Zn bimetallic oxide catalyst and application of Ni/Zn bimetallic oxide catalyst in oxidative dehydrogenation reaction of n-butane

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Experimental program
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Effect test

Embodiment 1

[0028] Catalyst preparation process

[0029] 1.4540g Ni(NO 3 ) 2 ·6H 2 O and 0.0149g Zn(NO 3 ) 2 ·6H 2 O was dissolved in 90mL distilled water, and this solution was recorded as A solution, and then the A solution was transferred to a 70°C water bath, and 1.5917g of citric acid monohydrate (C 6 h 8 o 7 ·H 2 O) be dissolved in 50mL distilled water, and this solution is denoted as B solution. Slowly add solution B to solution A dropwise, continue to stir the mixed solution in a 70°C water bath until it becomes viscous, and transfer the viscous material to an oven at 120°C for overnight drying. A spongy green powder was obtained. The dried sample was roasted at 800°C for 3 hours in a tube furnace with an oxygen atmosphere, cooled, ground, and sieved to obtain a nickel oxide catalyst of 40-60 meshes. The catalyst was recorded as NiZn 0.01 , sealed and preserved.

[0030] oxidative dehydrogenation process

[0031] 0.2 g of the above-mentioned catalyst was filled into a...

Embodiment 2

[0034] Catalyst preparation process

[0035] 1.4540g Ni(NO 3 ) 2 ·6H 2 O and 0.1487g Zn(NO 3 ) 2 ·6H 2 O was dissolved in 90mL distilled water, and this solution was recorded as A solution, and then the A solution was transferred to a 70°C water bath, and 1.7336g of citric acid monohydrate (C 6 h 8 o 7 ·H 2 O) be dissolved in 50mL distilled water, and this solution is denoted as B solution. Slowly add solution B to solution A dropwise, continue to stir the mixed solution in a 70°C water bath until it becomes viscous, and transfer the viscous material to an oven at 120°C for overnight drying. A spongy green powder was obtained. The dried sample was calcined at 550°C for 5 hours in a tube furnace with an oxygen atmosphere, cooled, ground, and sieved to obtain a nickel-zinc composite oxide catalyst of 40-60 meshes. The catalyst was recorded as NiZn 0.1 , sealed and preserved.

[0036] oxidative dehydrogenation process

[0037] 0.2 g of the above-mentioned catalyst wa...

Embodiment 3

[0040] Catalyst preparation process

[0041] 1.4540g Ni(NO 3 ) 2 ·6H 2 O and 0.7437g Zn(NO 3 ) 2 ·6H 2 O was dissolved in 90mL distilled water, and this solution was recorded as A solution, and then the A solution was transferred to a 70°C water bath, and 2.3640g of citric acid monohydrate (C 6 h 8 o 7 ·H 2 O) be dissolved in 50mL distilled water, and this solution is denoted as B solution. Slowly add solution B to solution A dropwise, continue to stir the mixed solution in a 70°C water bath until it becomes viscous, and transfer the viscous material to an oven at 120°C for overnight drying. A spongy green powder was obtained. The dried sample was calcined at 800°C for 3 hours in a tube furnace with an oxygen atmosphere, cooled, ground, and sieved to obtain a nickel-zinc composite oxide catalyst of 40-60 meshes. The catalyst was recorded as NiZn 0.5 , sealed and preserved.

[0042] oxidative dehydrogenation process

[0043]0.2 g of the above-mentioned catalyst was...

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Abstract

The invention discloses synthesis of a Ni / Zn bimetallic oxide catalyst and application of the Ni / Zn bimetallic oxide catalyst in oxidative dehydrogenation reaction of n-butane, and belongs to the technical field of catalysts for oxidative dehydrogenation reaction of n-butane. The Ni / Zn bimetallic oxide material is prepared by adopting a sol-gel method. The catalyst catalyzes oxidative dehydrogenation of n-butane under the conditions of no water vapor protection and low oxygen-alkane feed ratio to generate dehydrogenation products such as butene, butadiene and the like. More specifically, a nickel salt, a zinc salt and deionized water are prepared according to a certain molar ratio, citric acid is used as a complexing agent, spongy green powder is obtained through sufficient stirring, solvent evaporation, aging and drying, and then the Ni / Zn bimetallic oxide catalyst is obtained through roasting. Different from a NiO catalyst with a single composition, the Ni / Zn bimetallic oxide catalyst can effectively catalyze butane to be converted into olefin. And the catalyst has good stability, is not easy to burn and inactivate in the reaction process, and is not easy to deposit carbon.

Description

technical field [0001] The invention belongs to the field of catalysts, in particular to the synthesis of a Ni / Zn double metal oxide catalyst and its application in n-butane oxidation dehydrogenation reaction. Background technique [0002] C 4 The components of hydrocarbons have attracted widespread attention due to their application in both fuel and chemical industry. Among them, butane widely exists in the by-products of petrochemical and coal chemical industries, and it is no longer suitable as fuel. The corresponding dehydrogenated olefin products such as Butene and butadiene are chemical intermediates that are in great demand. The development and utilization of n-butane dehydrogenation technology to produce butadiene is of great significance to the efficient utilization of C4 alkanes resources. Compared with the butane catalytic dehydrogenation process, the n-butane oxidative dehydrogenation reaction has significant advantages: no thermodynamic limit; relatively low t...

Claims

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Application Information

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IPC IPC(8): B01J23/80C07C5/48C07C11/08C07C11/16
CPCB01J23/80B01J23/002C07C5/48C07C2523/80C07C11/08C07C11/16
Inventor 程党国王炼万超陈丰秋詹晓力
Owner ZHEJIANG UNIV
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