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A kind of wet oxidation catalyst and its preparation method and application

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 poor catalytic activity, high energy consumption, difficult operation, etc. question

Active Publication Date: 2021-06-11
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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  • A kind of wet oxidation catalyst and its preparation method and application
  • A kind of wet oxidation catalyst and its preparation method and application
  • A kind of wet oxidation catalyst and its preparation method and application

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 with 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 (oil pha...

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Abstract

The invention relates to the technical field of catalysts, and provides a wet oxidation catalyst as well as its preparation method and application. The wet oxidation catalyst provided by the present invention includes a reducing carrier and a noble metal active component loaded on the reducing carrier, wherein the noble metal active component and the metal elements in the reducing carrier are stable at a lower valence state, which is beneficial to the activation of oxygen and transmission, can promote the oxidation of organic matter, thereby improving the catalytic activity of the catalyst at low temperature and reducing the working temperature of the catalyst; the wet oxidation catalyst provided by the present invention has high catalytic activity at low temperature, and the catalytic activity at 100°C can reach 100%. . Applying the wet oxidation catalyst of the present invention to the treatment of organic wastewater can greatly reduce the temperature of wastewater treatment, thereby reducing the difficulty of organic wastewater treatment and reducing energy consumption.

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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Patent Type & Authority Patents(China)
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