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Wet oxidation catalyst and preparation method and application thereof

A wet oxidation and catalyst technology, applied in physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, etc., can solve the problems of poor catalytic activity, difficult operation and high energy consumption , to achieve the effect of easy operation and simple steps

Active Publication Date: 2020-05-12
XIAMEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the working temperature of noble metal catalysts is usually higher than 160°C, and the catalytic activity is poor at low temperatures, resulting in high energy consumption and difficult operation when using noble metal catalysts to treat wastewater

Method used

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  • Wet oxidation catalyst and preparation method and application thereof
  • Wet oxidation catalyst and preparation method and application thereof
  • Wet oxidation catalyst and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0068] (1) TiO 2 Put it into a round bottom flask, add ruthenium chloride aqueous solution, then add 5mL deionized water, stir well to make it disperse evenly; control TiO 2 The dosage is 0.5g, and the dosage of ruthenium chloride is 10mg, so that the mass ratio of the noble metal active component and the carrier in the final catalyst is 1:99.

[0069] (2) Rotary evaporator evaporates water, and then dries the evaporated matter in an oven to obtain a catalyst precursor.

[0070] (3) Carry out the first reduction of the catalyst precursor in a hydrogen atmosphere, then roast in methane successively in nitrogen, and finally carry out the second reduction in a hydrogen atmosphere, wherein the temperature of the first reduction is 400 ° C, and the time is 4h, The temperature of roasting in methane is 500° C. for 2 hours, the temperature of roasting in nitrogen is 500° C. for 2 hours, and the temperature of second reduction is 400° C. for 4 hours. After the second reduction is co...

Embodiment 2～4

[0072] Other steps are the same as in Example 1, only the ruthenium chloride aqueous solution is replaced by rhodium chloride aqueous solution, palladium chloride aqueous solution and chloroplatinic acid aqueous solution respectively, and the gained catalyst is successively recorded as Rh-TiO 2 -impregnation, Pd-TiO 2 -impregnation and Pt-TiO 2 -impregnation.

Embodiment 5

[0074] (1) 0.05 g of ruthenium acetylacetonate, 18 ml of oleylamine and 0.2 g of borane-tert-butylamine were mixed, and reacted at 150° C. for 2 hours to obtain ruthenium nanoparticles.

[0075] (2) TiO 2 Dissolve in toluene, add ruthenium nanoparticles, centrifuge and dry after fully stirring to obtain a catalyst precursor, in which TiO 2 The mass ratio to ruthenium nanoparticles is 1:99.

[0076] (3) Carry out the first reduction of the catalyst precursor in a hydrogen atmosphere, then roast in methane successively in nitrogen, and finally carry out the second reduction in a hydrogen atmosphere, wherein the temperature of the first reduction is 400 ° C, and the time is 4h, The temperature for roasting in methane is 300° C. for 4 hours, the temperature for roasting in nitrogen is 300° C. for 4 hours, and the temperature for the second reduction is 400° C. for 4 hours. After the second reduction is completed, the wet oxidation catalyst is obtained, which is Ru-TiO 2 -oil (o...

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PUM

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Abstract

The invention relates to the technical field of catalysts and provides a wet oxidation catalyst and a preparation method and application thereof. The wet oxidation catalyst provided by the invention comprises a reductive carrier and a noble metal active component loaded on the reductive carrier, wherein metal elements in the noble metal active component and the reductive carrier are stabilized ina relatively low valence state, so that the activation and transfer of oxygen are facilitated, the oxidation of organic matters can be promoted, the catalytic activity of the catalyst at low temperature is improved, and the working temperature of the catalyst is reduced; the wet oxidation catalyst provided by the invention is high in low-temperature catalytic activity, and the catalytic activity at 100 DEG C can reach 100%. When the wet oxidation catalyst is applied to treatment of organic wastewater, the wastewater treatment temperature can be greatly reduced, so that the treatment difficultyof the organic wastewater is reduced, and the energy consumption is reduced.

Description

technical field [0001] The invention relates to the technical field of catalysts, in particular to a wet oxidation catalyst and its preparation method and application. Background technique [0002] At present, my country's economy is developing rapidly, but the traditional industrial production mode has brought a series of problems to the environment. A large number of refractory, even toxic and harmful organic substances have continuously entered the water body, and water body pollution has seriously affected the progress and development of human society. [0003] Catalytic wet oxidation method refers to the oxidation and decomposition of organic matter and ammonia in sewage into CO by air oxidation under certain temperature, pressure and catalyst. 2 、H 2 O and N 2 and other harmless substances to achieve the purpose of purification. Using catalytic wet oxidation method to directly convert highly toxic and harmful substances in wastewater into less toxic and harmless su...

Claims

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Application Information

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IPC IPC(8): B01J23/42B01J23/44B01J23/46B01J23/63C02F1/72C02F101/30C02F101/34
CPCB01J23/002B01J23/42B01J23/44B01J23/462B01J23/464B01J23/63C02F1/725C02F1/727C02F2101/30C02F2101/345C02F2209/20
Inventor 张诺伟陈冰冰陈秉辉耿莉莉熊文婷谢建榕郑进保叶松寿
Owner XIAMEN UNIV
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