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Graphene oxide rare earth compound catalytic material and preparation method thereof

A catalytic material, graphene-based technology, applied in the direction of metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems that cannot meet the requirements of complete conversion, and achieve Improve catalytic reaction efficiency, improve catalytic activity, good repeatability

Active Publication Date: 2015-01-28
HEBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Its core innovation is to recrystallize the perovskite-type rare earth oxide particles through hydrothermal reaction, so that the crystal form can be further developed and improved, and the agglomeration phenomenon can be improved; through the additive tourmaline, the micro-electric field generated by it can be used to control the particle size of rare earth oxide particles. Increase, make its specific surface area increase and expose more reactive sites at the same time, improve its catalytic combustion reactivity, but the catalyst activity still can not meet the requirements of complete conversion of methane catalytic combustion at low temperature, the catalyst obtained in each embodiment The complete conversion temperature is still as high as 510°C, but the complete conversion temperature of the catalyst obtained in this patent is reduced to 405°C, which can basically meet the requirements of complete conversion of methane catalytic combustion at low temperature

Method used

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  • Graphene oxide rare earth compound catalytic material and preparation method thereof
  • Graphene oxide rare earth compound catalytic material and preparation method thereof
  • Graphene oxide rare earth compound catalytic material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] (1) The perovskite rare earth oxide material LaCoO 3 10g was dissolved in 80ml deionized water, ultrasonicated for 2 hours, transferred to a reaction kettle, and sealed;

[0044] (2) The hydrothermal reaction temperature is 180°C, and the reaction time is 24h;

[0045] (4) After the hydrothermal reaction finishes, the reactor is cooled to room temperature with the oven;

[0046] (5) Filter the product and wash it several times with deionized water until pH=6;

[0047] (6) Put it in an oven and dry it at 80°C to obtain a hydrothermally treated lanthanum cobaltate sample;

Embodiment 2

[0050] (1) The perovskite rare earth oxide material LaCoO 3 10g and 50g of ethylenediamine were dissolved in 80ml of deionized water, ultrasonicated for 2 hours, transferred to the reaction kettle, and sealed; (this example did not add graphene oxide, as a comparative example, to illustrate the effect of graphene oxide)

[0051] (2) The hydrothermal reaction temperature is 180°C, and the reaction time is 24h;

[0052] (4) After the hydrothermal reaction finishes, the reactor is cooled to room temperature with the oven;

[0053] (5) The product is filtered and washed with deionized water several times until pH=6;

[0054] (6) drying in an oven at 80° C. to obtain a hydrothermally-treated surface-activated rare earth oxide catalyst;

Embodiment 3

[0056] (1) The perovskite rare earth oxide material LaCoO 3 10g, 50g of ethylenediamine, 8ml of graphene oxide suspension (80mg / ml) were dissolved in 80ml of deionized water, ultrasonicated for 2 hours, transferred to the reaction kettle, and sealed;

[0057] (2) The hydrothermal reaction temperature is 180°C, and the reaction time is 24h;

[0058] (4) After the hydrothermal reaction finishes, the reactor is cooled to room temperature with the oven;

[0059] (5) The product is filtered and washed with deionized water several times until pH=6;

[0060] (6) Putting it into an oven for drying at 80° C. to obtain a graphene oxide-based hydrothermally treated surface-activated rare earth oxide composite catalyst;

[0061] figure 1 Untreated perovskite-type rare earth oxide material LaCoO 3 From the XRD pattern of the sample, it can be seen that the sample has good crystallinity and no impurity phase is formed. figure 2 It is the XRD pattern of the sample of Example 1. It can...

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Abstract

The invention discloses a graphene oxide rare earth compound catalytic material and a preparation method thereof. The catalytic material comprises the following raw materials in percentage by mass: 0.47-1.48% of graphene oxide, 11.71-28.25% of perovskite type rare earth oxide and 70.62-87.82% of an additive. The catalytic material is prepared from graphene oxide, perovskite type rare earth oxide and the additive by using a hydrothermal method; the perovskite type rare earth oxide is ABO3 oxide; the additives are ethanediamine, hydrazine hydrate or urea. The catalyst disclosed by the invention is excellent in methane combustion catalytic activity, the initial combustion temperature is 300 DEG C, complete conversion can be achieved at 405 DEG C, the activity effect is relatively good, the initial combustion temperature is identical, and the complete conversion temperature is reduced by 85 DEG C.

Description

technical field [0001] The invention relates to a novel catalyst material, which can be used in the field of purification treatment of natural gas vehicle tail gas, mine ventilation and industrial waste gas. Specifically, it is a novel structure graphene oxide-based rare earth composite catalytic material and a preparation method thereof. Background technique [0002] With the rapid development of economy, energy shortage and environmental problems are becoming more and more serious. Natural gas is a new type of clean energy, which has the advantages of high combustion efficiency, less pollution, and convenient transportation and use. It has attracted widespread attention as a clean alternative energy. However, the main component of natural gas, methane, is a hydrocarbon that is difficult to activate. The traditional combustion method needs to be carried out at a very high temperature, and the residual methane gas after incomplete combustion will also pollute the environmen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/83B01J23/34B01J23/889F23G7/07
Inventor 薛刚赵颖梁金生黄志焕郑路宁
Owner HEBEI UNIV OF TECH
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