Aluminiferous SiO2 loaded high-dispersion Pt catalyst, and preparation method and application thereof

A highly dispersed and catalytic technology, applied in the field of air pollution control, can solve the problems of catalytic combustion waste, high load capacity, and high cost

Active Publication Date: 2017-07-18
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among the supported noble metal catalysts currently studied for the removal of oxygen-containing VOCs, the loading of noble metals is relatively high, generally around 1wt.%, the dispersion is low, generally around 39%, and the stability is not high. Great waste was caused in the process, and the cost was extremely high, resulting in the inability to further industrial application
In addition, during the preparation of supported noble metal catalysts for the oxidation of methyl ethyl ketone, the influence of the microscopic morphology of the support on the morphology of the catalyst was not considered

Method used

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  • Aluminiferous SiO2 loaded high-dispersion Pt catalyst, and preparation method and application thereof
  • Aluminiferous SiO2 loaded high-dispersion Pt catalyst, and preparation method and application thereof
  • Aluminiferous SiO2 loaded high-dispersion Pt catalyst, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] 1) Preparation of rod-shaped silica with high specific surface area by double surfactant method and hydrothermal synthesis method:

[0044] Put 1g of cetyltrimethylammonium bromide (CTAB) and 100mL of ammonia water (concentration: 25%) in a 500mL round-bottomed flask, stir and mix evenly at room temperature, and add 0.06g of Polyethylene oxide-polypropylene oxide-polyethylene oxide triblock copolymer (P123), at a stirring rate of 300 rpm, the temperature was raised to 40 degrees Celsius. When the reaction solution became clear, 2 mL of tetraethyl orthosilicate (TEOS) was added quickly, and stirring was continued at 40° C. for 3 h.

[0045] The obtained microemulsion was placed in a 250 mL polytetrafluoroethylene-lined stainless steel autoclave for hydrothermal crystallization at 100 °C for 24 h. After cooling down to room temperature, the mixture was filtered, washed with absolute ethanol and deionized water, dried at room temperature for 48 hours, and calcined in a mu...

Embodiment 2

[0055] The difference from Example 1 is that in step 4), 3mL of the PVP-Pt-containing ethanol solution obtained in step 3) is taken, and the final preparation is Pt / K-(Al)SiO with a loading capacity of 0.3wt%. 2 catalyst.

Embodiment 3

[0057] The difference from Example 1 is that in step 4), 1mL of the ethanol solution containing PVP-Pt obtained in step 3) is taken, and the Pt / K-(Al)SiO with a loading capacity of 0.1wt% is finally prepared. 2 catalyst.

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Abstract

The invention relates to an aluminiferous SiO2 loaded high-dispersion Pt catalyst, and a preparation method and application thereof. The method comprises the following steps: uniformly mixing a PVP-Pt ethyl alcohol solution with absolute ethyl alcohol, and then adding K modified rod-shaped aluminiferous SiO2 and uniformly mixing, thereby acquiring a mixed solution; filtering the acquired mixed solution, washing and drying, and then roasting for 4-7h under the air atmosphere at 400-600 DEG C; roasting for 4-7h under the hydrogen atmosphere at 400-600 DEG C, thereby acquiring the aluminiferous SiO2 loaded high-dispersion Pt catalyst. The aluminiferous SiO2 loaded high-dispersion Pt catalyst is prepared according to a double-surfactant method, a hydrothermal synthesis method, a post-modification aluminizing method, an ion exchange method, a glycol reduction method, a colloid impregnation method, and the like, has Pt nano-particles with high specific surface area, large micropore volume and high dispersing degree, has an excellent low-temperature catalytic oxidation property to OVOCs and has ultrahigh reaction stability.

Description

technical field [0001] The invention belongs to the technical field of air pollution control, in particular to an aluminum-containing SiO 2 Loaded highly dispersed Pt catalyst and its preparation method and application. Background technique [0002] Volatile organic compounds (VOCs) refer to the general term for non-methane total hydrocarbons that are volatile at normal temperature and pressure, with a saturated vapor pressure exceeding 70 Pa or a boiling point between 50-260 °C. A large number of VOCs emissions not only cause a decline in air quality, but also cause great harm to the functions of the human immune system, kidneys and respiratory system, and increase the carcinogenicity of the human body (brain, pancreas, lymph, hematopoietic and stomach tissues and organs) risk. In the "Twelfth Five-Year Plan for Air Pollution Prevention and Control in Key Areas", it is required to add control requirements for smoke dust and volatile organic pollutants (VOCs) on the basis ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/58B01J35/10C01B33/12B01D53/86B01D53/44
CPCB01D53/8687C01B33/12B01J23/58B01J35/1023B01J35/1061B01D2257/708
Inventor 何炽姜泽宇于艳科潘华刘萍萍郑春莉
Owner XI AN JIAOTONG UNIV
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