A kind of preparation method and application of ruthenium-cerium-zirconium solid solution catalyst

A cerium-zirconium solid solution and catalyst technology, which is applied in the direction of catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc., to achieve the effects of high temperature resistance, good thermal stability and simple production process

Active Publication Date: 2020-03-10
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in these fields of catalytic oxidation, the operating temperature of the catalyst can sometimes reach above 800 °C, and it is difficult for the traditional supported Ru-based catalyst to operate at such a high temperature for a long time

Method used

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  • A kind of preparation method and application of ruthenium-cerium-zirconium solid solution catalyst
  • A kind of preparation method and application of ruthenium-cerium-zirconium solid solution catalyst
  • A kind of preparation method and application of ruthenium-cerium-zirconium solid solution catalyst

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Experimental program
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Effect test

Embodiment 1

[0017] A preparation method containing ruthenium cerium zirconium solid solution catalyst, the specific preparation method is as follows:

[0018] Dissolve 4.5 grams of ceric ammonium nitrate, 3.5 grams of zirconium oxychloride and 0.6 grams of lanthanum nitrate in 90 grams of deionized water, and slowly add 10% ammonia water dropwise while stirring, so that the pH of the solution is 1.5, place it in a water bath at 50°C for 24 hours, then add 3 grams of urea and 1 gram of 5% ruthenium chloride solution, and mix well. The obtained mixed solution was poured into a reaction kettle lined with polytetrafluoroethylene, and kept at 180° C. for 20 hours. The obtained precipitate was centrifuged and washed three times with deionized water. The washed precipitate was dried at 120° C. for 12 hours and calcined at 600° C. for 4 hours to obtain a solid solution catalyst containing ruthenium, cerium and zirconium. The above catalyst was calcined at 960° C. for 20 hours for rapid aging to ...

Embodiment 2

[0020] 43 grams of ceric ammonium nitrate, 36 grams of zirconium oxychloride and 7 grams of lanthanum nitrate were dissolved in 880 grams of deionized water, and slowly added dropwise 10% ammonia water while stirring, so that the pH of the solution was 1.5, place it in a water bath at 60°C for 12 hours, then add 22 grams of urea and 15 grams of 5% ruthenium chloride solution, and mix well. The obtained mixed solution was poured into a reaction kettle lined with polytetrafluoroethylene, and kept at 150° C. for 36 hours. The obtained precipitate was centrifuged and washed three times with deionized water. The washed precipitate was dried at 120° C. for 12 hours and calcined at 600° C. for 4 hours to obtain a ruthenium-cerium-zirconium solid solution catalyst. The above catalyst was calcined at 960° C. for 20 hours for rapid aging to obtain an aged catalyst.

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Abstract

The invention discloses a preparation method and application of a ruthenium, cerium and zirconium-containing solid solution catalyst. The preparation method of the ruthenium, cerium and zirconium-containing solid solution catalyst comprises the following steps: firstly, dissolving ceric ammonium nitrate, zirconium oxychloride and lanthanum nitrate in a certain ratio into deionized water; then, adding 1 to 20 weight percent of ammonia water slowly to regulate the pH value of the solution to be 1.5, standing for 12 to 72 hours at 30 to 80 DEG C, adding urea and 5 percent ruthenium chloride solution, and mixing uniformly; next, insulating the heat of the mixed solution for 4 to 36 hours at 120 to 200 DEG C; finally, performing centrifuging, washing, drying and baking an obtained precipitate to obtain the ruthenium, cerium and zirconium-containing solid solution catalyst. The preparation method is simple in production process, economical and environment-friendly; moreover, the high-temperature heat stability is high; the prepared ruthenium, cerium and zirconium-containing solid solution catalyst can be applied to the fields of catalytic purification of automobile exhaust and dry gas reforming reaction of methane.

Description

technical field [0001] The invention relates to an inorganic functional material and a preparation method thereof, in particular to a preparation method and application of a ruthenium-cerium-zirconium solid solution catalyst. Background technique [0002] Ru-based catalysts are not only maturely used in the field of homogeneous catalysis, such as: olefin metathesis polymerization, Heck and isomerization and other organic synthesis reactions, but also in the field of heterogeneous catalysis, such as ammonia synthesis, Fischer-Tropsch synthesis, catalytic hydrogenation, CO It is also widely used in fields such as conversion and hydrocarbon reforming to synthesis gas. The content of precious metal Ru in the earth's crust is very small. In order to improve the utilization rate of Ru particles and reduce the cost of catalysts, it is generally loaded on a carrier material with high specific surface area to increase the specific surface area and dispersion of Ru metal particles. T...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/63B01J37/08B01D53/94B01D53/56B01D53/72B01D53/62C01B3/02
Inventor 郑勇肖益鸿蔡国辉钟富兰
Owner FUZHOU UNIV
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