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Preparation method of magnetoplumbite type CH4-CO2 reforming catalyst

A CH4-CO2, reforming catalyst technology, applied in the direction of catalyst activation/preparation, metal/metal oxide/metal hydroxide catalyst, physical/chemical process catalyst, etc., can solve the problem of high energy consumption and the presence of many impurity phases , product impurity and other issues

Active Publication Date: 2016-09-28
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Such preparation technique has obvious shortcoming: one, a large amount of nitrate radicals decomposes and emits harmful gas to pollute the environment; second, the decomposition and release of a large amount of nitrate radicals and organic matter greatly reduces the final product obtained, and the yield is low; third, due to The final calcination is actually a solid-state reaction process, so the calcination temperature often exceeds 1100°C and consumes a lot of energy; Fourth, the product is often impure and has many impurities
That is to say, such a preparation process has problems such as high energy consumption, low product quality and environmental protection.

Method used

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  • Preparation method of magnetoplumbite type CH4-CO2 reforming catalyst

Examples

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Effect test

Embodiment 1

[0037] (1) According to n(SrO):n(NiO):n(Al 2 o 3 )=1:1:6 molar ratio design magnetoplumbite structure oxide composition. First weigh a certain amount of sodium aluminate NaAlO 2 Chemical reagents, and use deionized water to prepare an aqueous solution with a concentration of 0.60 mol / L. Then weigh nickel nitrate Ni (NO 3 ) 2 ·6H 2 O and strontium nitrate Sr(NO 3 ) 2 Chemical reagents, dissolved in appropriate amount of deionized water.

[0038] (2) The sodium aluminate aqueous solution was placed in a digitally controlled temperature-adjusting ultrasonic instrument, and the nickel nitrate solution was first slowly added into it under the action of continuous stirring and ultrasonic waves at 50°C, and the strontium nitrate solution was continued to be slowly added after 10 minutes. Then the prepared mass concentration of 1% HNO 3 The solution was slowly added dropwise to the beaker, the pH value was adjusted to 9.5, and the ultrasonic stirring was continued for 20 min ...

Embodiment 2

[0042] (1) According to n(SrO):n(NiO):n(Al 2 o 3 )=1:1:6 molar ratio design magnetoplumbite structure oxide composition. First weigh a certain amount of sodium aluminate NaAlO 2 Chemical reagents, and use deionized water to prepare an aqueous solution with a concentration of 0.65mol / L. Then weigh nickel nitrate Ni (NO 3 ) 2 ·6H 2 O and strontium nitrate Sr(NO 3 ) 2 Chemical reagents, dissolved in appropriate amount of deionized water.

[0043] (2) The sodium aluminate aqueous solution was placed in a numerically controlled temperature-adjusting ultrasonic instrument, and the nickel nitrate solution was slowly added to it under the action of continuous stirring and ultrasonic waves at 45°C, and then the strontium nitrate solution was continued to be slowly added after 5 minutes. Then the prepared mass concentration of 1% HNO 3 The solution was slowly added dropwise into the beaker, the pH value was adjusted to 10, and the ultrasonic stirring was continued for 30 min to...

Embodiment 3

[0047] (1) According to n(SrO):n(NiO):n(Al 2 o 3 )=1:1:6 molar ratio design magnetoplumbite structure oxide composition. First weigh a certain amount of sodium aluminate NaAlO 2 Chemical reagents, and use deionized water to prepare an aqueous solution with a concentration of 0.50 mol / L. Then weigh nickel nitrate Ni (NO 3 ) 2 ·6H 2 O and strontium nitrate Sr(NO 3 ) 2 Chemical reagents, dissolved in appropriate amount of deionized water.

[0048] (2) The sodium aluminate aqueous solution was placed in a digitally controlled temperature-adjusting ultrasonic instrument, and the nickel nitrate solution was first slowly added to it under the action of continuous stirring and ultrasonic waves at 45°C, and then the strontium nitrate solution was continued to be slowly added after 8 minutes. Then the prepared mass concentration of 1% HNO 3 The solution was slowly added dropwise into the beaker, the pH value was adjusted to 9.0, and the ultrasonic stirring was continued for 25 ...

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Abstract

The invention discloses a preparation method of a magnetoplumbite type CH4-CO2 reforming catalyst. According to the preparation method, alkaline sodium aluminate NaAlO2 is taken as an aluminum source, nickel nitrate Ni (NO3)2 is taken as a nickel source, strontium nitrate Sr (NO3)2 is taken as a strontium source, a nickel strontium aluminate precipitation copolymer is obtained with an ultrasonic copolymerization method, a hydrothermal reaction is performed for 16-20 h at the temperature of 160-180 DEG C, a pre-crystallization body with a magnetoplumbite structure is prepared, finally, crystallization sintering is performed for 6-8 h at the lower temperature of 750-850 DEG C, and a magnetoplumbite-structured SrNiAl11O19 reforming catalyst material with higher purity and good crystallization condition can be prepared.

Description

【Technical field】 [0001] The invention belongs to the field of methane carbon dioxide reforming catalysts, in particular to a magnetoplumbite-type CH 4 -CO 2 Process for the preparation of reforming catalysts. 【Background technique】 [0002] methane carbon dioxide reforming (CO 2 reforming of methane, DRM) to 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 synthesizing methanol, dimethyl ether, etc. Therefore, 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 fuel. When the effective use of energy and the reduction of greenhouse gas emissions are increasingly becoming hot issues of concern to all countries in the world, DRM has great practical significance for alleviating the energy crisis and environmental protection. Fo...

Claims

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Application Information

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IPC IPC(8): B01J23/78B01J37/03B01J37/00
CPCB01J23/78B01J37/00B01J37/031
Inventor 张超武张楠张利娜王夏云王芬
Owner SHAANXI UNIV OF SCI & TECH
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