Preparation method of reforming catalyst oxide active component Ni-Mn-Mg-O

A technology for reforming catalysts and active components, applied in catalyst activation/preparation, chemical elements of heterogeneous catalysts, chemical instruments and methods, etc. Carbon, the effect of enhancing catalytic activity

Active Publication Date: 2016-08-17
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, nickel-based catalysts still have the problem of carbon deposition and even deactivation

Method used

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  • Preparation method of reforming catalyst oxide active component Ni-Mn-Mg-O
  • Preparation method of reforming catalyst oxide active component Ni-Mn-Mg-O

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preparation example Construction

[0030] A preparation method for reforming catalyst oxide active component Ni-Mn-Mg-O, comprising the following steps:

[0031] Step 1: Design the composite oxide composition according to the molar ratio of n(NiO):n(MnO):n(MgO)=(2~4):2:1, first weigh a certain amount of nickel nitrate chemical reagent, and use deionized Water: Nickel nitrate is prepared into an aqueous solution with a concentration of 0.45 to 0.60 mol / L, and manganese nitrate and magnesium nitrate chemical reagents are weighed according to the designed molar ratio for subsequent use;

[0032] Step 2: Put the nickel nitrate aqueous solution in a numerically controlled temperature-adjusting ultrasonic instrument, slowly add the weighed manganese nitrate and magnesium nitrate under the action of ultrasonic waves at 40-50°C, and stir continuously at the same time, and wait until the solids are completely dissolved. , slowly drop the prepared KOH solution with a mass concentration of 20% into the beaker, adjust the ...

Embodiment 1

[0037] (1) The composite oxide composition is designed according to the molar ratio of n(NiO):n(MnO):n(MgO)=2:2:1. First weigh a certain amount of nickel nitrate chemical reagent, and use deionized water to prepare nickel nitrate into an aqueous solution with a concentration of 0.5 mol / L. Then take manganese nitrate and magnesium nitrate chemical reagents respectively according to the designed mol ratio for subsequent use.

[0038] (2) Put the aqueous solution of nickel nitrate in a numerically controlled temperature-adjusting ultrasonic instrument, add the weighed manganese nitrate and magnesium nitrate into it slowly under the action of ultrasonic waves at 50° C., and continuously stir at the same time. After the solid was completely dissolved, the prepared KOH solution with a mass concentration of 20% was slowly dropped into the beaker, the pH value was adjusted to 10, and ultrasonic stirring was continued for 30 min to obtain a copolymerized precipitate suspension.

[003...

Embodiment 2

[0042] (1) The composite oxide composition is designed according to the molar ratio of n(NiO):n(MnO):n(MgO)=3:2:1. First weigh a certain amount of nickel nitrate chemical reagent, and use deionized water to prepare nickel nitrate into an aqueous solution with a concentration of 0.5 mol / L. Then take manganese nitrate and magnesium nitrate chemical reagents respectively according to the designed mol ratio for subsequent use.

[0043] (2) Put the aqueous solution of nickel nitrate in a numerically controlled temperature-adjusting ultrasonic instrument, add the weighed manganese nitrate and magnesium nitrate into it slowly under the action of ultrasonic waves at 50° C., and continuously stir at the same time. After the solid was completely dissolved, the prepared KOH solution with a mass concentration of 20% was slowly dropped into the beaker, the pH value was adjusted to 10, and ultrasonic stirring was continued for 30 min to obtain a copolymerized precipitate suspension.

[004...

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Abstract

The invention discloses a preparation method of a reforming catalyst oxide active component Ni-Mn-Mg-O. The method comprises the following steps: preparing composite oxide prepolymer powder from nickel nitrate, manganese nitrate and magnesium nitrate through an ultrasonic copolymerization precipitation technology and a hydrothermal technology with KOH as a copolymerization precipitating agent and a pH adjusting agent, and crystallizing and sintering the powder in 600-700DEG C atmosphere to obtain the Ni-Mn-Mg-O composite oxide active component. A test result shows that the obtained Ni-Mn-Mg-O composite oxide active component has a high purity and has cubic system crystallization characteristics, and nanometer level particle uniform distribution provides necessary microstructure conditions for full performance of the catalyst activity.

Description

technical field [0001] The invention belongs to the field of methane carbon dioxide reforming catalysts, and in particular relates to a preparation method of Ni-Mn-Mg-O, an oxide active component of a reforming catalyst. Background technique [0002] The effective use of energy and the reduction of greenhouse gas emissions are hot issues of concern to all countries in the world today, and have great practical significance for alleviating the energy crisis and environmental protection. Reforming methane with carbon dioxide (CO 2 reforming of methane, DRM) can produce synthesis gas H 2 / CO, this kind of synthesis gas can not only be used to produce liquid fuel, but also an ideal raw material for the synthesis of methanol, dimethyl ether, etc. It can be seen that DRM can not only achieve the purpose of improving energy utilization efficiency and reducing greenhouse gas emissions, but also liquid fuel can replace petroleum energy, thereby alleviating the shortage of liquid fue...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/889B01J37/34B01J37/10C01B3/40
CPCY02P20/52B01J23/8892B01J23/002B01J37/10B01J37/343B01J2523/00C01B3/40C01B2203/0238C01B2203/1241B01J2523/847B01J2523/72B01J2523/22
Inventor 张超武张利娜王夏云张楠王芬
Owner SHAANXI UNIV OF SCI & TECH
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