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Oxide powder and preparation method thereof as well as catalyst and carrier thereof

A technology of oxide powder and oxide, which is applied in the direction of catalyst carrier, oxide/hydroxide preparation, metal/metal oxide/metal hydroxide catalyst, etc., can solve the problems of complicated and complicated process, and achieve the benefit of diffusion , low density, high catalytic activity effect

Inactive Publication Date: 2013-06-26
SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

From the above literature summary, it can be known that the published literature often prepares spheres with a hollow structure by the template method or the hydrothermal template-free method, and the preparation process is tedious and complicated.

Method used

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  • Oxide powder and preparation method thereof as well as catalyst and carrier thereof
  • Oxide powder and preparation method thereof as well as catalyst and carrier thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] Add a certain amount of titanyl sulfate to the aqueous solution of CTAB (0.4g / L) at room temperature, stir for 12 hours and then filter to obtain titanyl sulfate solution (solid content 5wt%), add ammonia water (ammonia water concentration 28%) to pH = 5.5 to obtain Slurry A1; Slurry A1 was washed three times with CTAB aqueous solution (0.4g / L), and the obtained solid phase filter cake was added to CTAB aqueous solution (0.4g / L) and ammonia water (ammonia concentration 28%) was added to adjust the pH to 5.5 , ultrasonicated at 50kHZ for 1h, aged at 80°C for 6h, spray-dried at 220°C (feed speed: 0.3m 3 / hour), roasted at 550°C for 3h to obtain white TiO 2 powder (labeled T-5.5).

Embodiment 2

[0048] The preparation conditions and procedures were the same as in Example 1, and the pH was adjusted to 9 to obtain white TiO2 powder (marked as T-9).

Embodiment 3

[0050] The preparation conditions and preparation procedures are the same as in Example 1, and the CTAB content of the CTAB aqueous solution is changed to 0g / L to obtain white TiO 2 powder (labeled T-5.5-C0).

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Abstract

The invention discloses an oxide powder and a preparation method thereof as well as a catalyst and a carrier thereof. The powder comprises powder of hollow microballoon structure which is formed by converged nanocrystalline oxide, and the wall of the hollow microballoon is provided with a porous structure. The preparation method is the method for preparing the powder. Aqueous solution system slurry suitable for spray drying is prepared by a precipitation method, the target powder is obtained through roasting after spray drying, and the catalyst and the carrier thereof comprise the oxide powder. Compared with the prior art, the powder has the porous hollow microballoon structure, thus having high specific surface area and being beneficial to dispersing substances when being used as the catalyst or the carrier thereof; and the processes are simple, easy to operate and suitable for industrialized production.

Description

technical field [0001] The invention belongs to the technical field of preparation of porous materials and environmental protection catalysts, and in particular relates to an oxide powder, a preparation method thereof, and a catalyst. Background technique [0002] TiO 2 It has the advantages of high chemical and biological stability and environmental friendliness, and it has a certain catalytic activity. It is often used as an environmental protection catalyst or the main component of an environmental protection catalyst (such as selective catalytic reduction of nitrogen oxides (SCR denitrification catalyst) ). [0003] V 2 o 5 -WO 3 -TiO 2 It is currently the main commercial SCR denitrification catalyst, and it mainly plays the role of dispersing the active component V in the catalyst 2 o 5 And improve the anti-sulfur poisoning performance of the catalyst. Thanks to WO 3 -TiO 2 Powder accounts for more than 80% of the catalyst preparation cost, how to reduce WO 3...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B13/14B82Y30/00B01J23/30B01J21/06B01J32/00
Inventor 翁端司知蠢杨柳扬王敏
Owner SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV
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