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Preparation method of Pt/TiO2 integral type oxidation catalyst

An integral catalyst, volume ratio technology, applied in catalyst activation/preparation, physical/chemical process catalyst, metal/metal oxide/metal hydroxide catalyst, etc. The surface firmness is not high, the technical route is complicated, etc., to achieve the effect of large application potential, wide application range, simple and flexible operation

Active Publication Date: 2018-06-05
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The entire technical route is relatively complicated, and the surface active components of the prepared catalyst are easy to agglomerate, and the firmness on the surface of the carrier is not high, and limited by the process, the carrier needs to have a certain regular shape
The existing monolithic catalyst preparation methods have relatively large limitations and are not flexible enough

Method used

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  • Preparation method of Pt/TiO2 integral type oxidation catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029]Mix absolute ethanol (10ml) and deionized water (10ml) at a volume ratio of 1:1, stir at room temperature, add formic acid to make pH = 2, and then dropwise add tetrabutyl titanate ( 10ml), stirred at room temperature for 7h, added 0.006g of anhydrous chloroplatinic acid, added dropwise hydrazine hydrate in an equimolar amount to chloroplatinic acid while stirring, then stirred at room temperature for 12h, and the reaction was completed, and the obtained solution was constant volume 100ml , and finally get TiO 2 Pt / TiO with a mass concentration of 2.4% 2 Dispersion, where the Pt content is TiO 2 0.12% of the content.

[0030] The above prepared Pt / TiO 2 XRD of the dispersion see figure 1 , both anatase TiO 2 Crystal phase, no other impurity phases; the dispersion was dried to obtain 3.281 g of solids, and the amount of solids after roasting the surface organic matter was 2.378 g. The above data can prove that the titanium element in the dispersion is TiO 2 form ex...

Embodiment 2

[0032] The same as the preparation process of the dispersion in Example 1, the difference is to adjust the pH=3 to finally obtain TiO 2 Pt / TiO with a mass concentration of 2.4% 2 Dispersion, where the Pt content is TiO 2 0.12% of the content.

Embodiment 3

[0034] The preparation process of the dispersion is the same as in Example 1, except that tetrabutyl titanate is added and stirred at 60°C for 1 h to finally obtain TiO 2 Pt / TiO with a mass concentration of 2.4% 2 Dispersion, where the Pt content is TiO 2 0.12% of the content.

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Abstract

The invention discloses a preparation method of a Pt / TiO2 integral type oxidation catalyst. The preparation method comprises the following steps: mixing absolute ethanol and deionized water, adding acid for regulating pH value, putting into thermostatic waterbath, stirring for forming a mixed solution, then dropwise adding tetrabutyl titanate, stirring to obtain TiO2 dispersion liquid, then addingchloroplatinic acid, dropwise adding sodium boronhydride or hydrazine hydrate solution while stirring, then adding deionized water, and carrying out constant volume treatment, so that Pt / TiO2 dispersion liquid is obtained; and then simply spraying the Pt / TiO2 dispersion liquid onto a matrix made from any overall material, so that the integral type catalyst is obtained. The preparation method disclosed by the invention is simple, active components are difficult to agglomerate and have strong capability of being combined with a carrier, and usage amount of noble metal Pt is low while performance is kept, so that industrial production cost of the catalyst can be cut down, and application potential is great.

Description

technical field [0001] The invention relates to the technical field of catalysts, in particular to Pt / TiO used for the treatment of volatile organic waste gases (VOCs) 2 Process for the preparation of monolithic catalysts. Background technique [0002] With the rapid economic development and accelerated industrialization process, volatile organic compounds (volatile organic compounds, referred to as VOCs) emitted into the air have increased rapidly, becoming one of the main air pollutants today. VOCs come from a wide range of sources, including petrochemicals, leather synthesis, coatings, baking varnishes, printing, pharmaceuticals, electronics, automobile exhaust and other industrial production processes. In addition to the deterioration of air quality caused by various industrial waste gases and automobile exhaust emissions, indoor air safety issues have also attracted much attention, especially in newly renovated houses where there are a large number of volatile organic ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/42B01J27/224B01D53/86B01D53/72
CPCB01D53/8668B01J23/42B01J27/224B01J37/0219B01D2257/7027B01D2257/708B01D2255/1021B01D2255/20707B01J35/394B01J35/39B01J35/23
Inventor 卢晗锋陈晓周瑛席康朱秋莲刘华彦张泽凯
Owner ZHEJIANG UNIV OF TECH
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