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Perovskite type composite oxide catalyst and its preparation method and application

A composite oxide and perovskite-type technology, which is applied in the direction of metal/metal oxide/metal hydroxide catalysts, preparation of liquid hydrocarbon mixtures, physical/chemical process catalysts, etc., can solve the problem of high oxygen content in liquefied products, Reduced stability, catalyst coking and other problems, to achieve the effect of eliminating surface coking, increasing contact area and reducing residue rate

Inactive Publication Date: 2018-07-03
茂名联绅科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

During the high-pressure liquefaction of biomass, the selectivity of the catalyst is low, and the liquefied products include alcohols, aldehydes, phenols, ketones and other components, which are difficult to use directly. During the liquefaction process, the coking of the catalyst is serious, resulting in a decrease in stability

Method used

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  • Perovskite type composite oxide catalyst and its preparation method and application
  • Perovskite type composite oxide catalyst and its preparation method and application
  • Perovskite type composite oxide catalyst and its preparation method and application

Examples

Experimental program
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Effect test

Embodiment 1

[0031] Preparation of a perovskite composite oxide catalyst La 1-x PR x NiO 3 , where: x=0, namely LaNiO 3 .

[0032] The preparation method is: prepare La according to the stoichiometric ratio 3+ 、Pr 3+ and Ni 2+ nitrate mixed aqueous solution, add ammonia water dropwise to the nitrate mixed solution under the condition of electric stirring, control pH = 12 as the precipitation end point, filter the obtained co-precipitate, wash with distilled water, dry at 130 ° C for 3 hours, 300 The product was obtained after pre-calcining at ℃ for 2 hours and calcining at 750℃ for 3 hours.

Embodiment 2

[0034] Preparation of a perovskite composite oxide catalyst La 1-x PR x NiO 3 , where: x=0.2, namely La 0.8 PR 0.2 NiO 3 .

[0035] The preparation method is: prepare La according to the stoichiometric ratio 3+ 、Pr 3+ and Ni 2+nitrate mixed aqueous solution, add ammonia water dropwise to the nitrate mixed solution under the condition of electric stirring, control pH = 13 as the precipitation end point, filter the obtained co-precipitate, wash with distilled water, dry at 100 ° C for 4 hours, 500 ℃ for 2 hours, 850 ℃ calcined for 4 hours to get the product.

Embodiment 3

[0037] Preparation of a perovskite composite oxide catalyst La 1-x PR x NiO 3 , where: x=0.4, namely La 0.6 PR 0.4 NiO 3 .

[0038] The preparation method is the same as in Example 1.

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Abstract

The invention relates to composite oxide catalyst and particularly relates to a perovskite-type composite oxide catalyst as well as a preparation method and application thereof. The perovskite-type composite oxide catalyst is La1-xPrxNiO3, wherein x is greater than or equal to 0 and less than or equal to 1. The catalyst is mainly used in biomass liquefaction and is high in activity, good in stability and high in poison tolerance. The perovskite-type composite oxide catalyst La1-xPrxNiO3 is an ABO3-type perovskite-type composite oxide, has relatively good catalytic activity during a high-pressure bagasse liquefaction reaction process, is capable of promoting the improvement on the bagasse liquefaction rate and reducing the residue content. Along with increase in content of Pr species, the residue rate is reduced, and the quantity of small-molecular products in liquefied products is increased. The invention further provides a preparation method of the perovskite-type composite oxide catalyst; the perovskite-type composite oxide catalyst is prepared by use of a coprecipitation method, and the process is reasonable. The invention further provides application of the perovskite-type composite oxide catalyst.

Description

technical field [0001] The invention relates to a composite oxide catalyst, in particular to a perovskite type composite oxide catalyst and its preparation method and application. Background technique [0002] With the depletion of non-renewable energy sources such as petroleum and coal, the development of alternatives to fossil energy, especially petroleum alternatives, has received more and more attention and has gradually become a research hotspot. As a large agricultural country, my country is rich in biomass resources, and the annual output of crop straw alone is about 580 million tons. Biomass liquefaction, as a technology that can convert biomass into clean and easily transportable liquid fuels, has also attracted the interest of many scholars. Biomass has a wide range of sources and is an important part of the future energy structure. However, the depth of utilization of biomass energy is not enough, and the conditions for industrialization are immature, especially...

Claims

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Application Information

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IPC IPC(8): B01J23/83C10G1/00
Inventor 滕俊江李凝张晓华
Owner 茂名联绅科技有限公司