Supported type Au catalyst containing organic polymer electronic auxiliary

A supported catalyst technology, applied in organic compound/hydride/coordination complex catalysts, physical/chemical process catalysts, dispersed particle separation, etc., can solve problems such as easy deactivation, low selectivity, and poor stability , to achieve the effect of adsorption and activation promotion, lower reaction temperature and promotion of catalytic oxidation

Active Publication Date: 2014-03-19
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

(Nattaya Comsup, Joongjai Panpranot, Piyasan Praserthdam. Catal Commun, 2010, 11: 1238–1243; Huaqing Zhu, Zhangfeng Qin, Wenjuan Shan, Wenjie Shen, Jianguo Wang. J Catal, 2005, 233: 41–50.) Among them, the remark focuses on the fact that the Au-supported catalyst has good low-temperature CO oxidation activity, but it has the disadvantages of poor stability and easy deactivation
Although the existence of a certain H2 in the reaction gas can improve the activity and stability of the catalytic oxidation of CO, it will cause the oxidation of H2 and make it less selective

Method used

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  • Supported type Au catalyst containing organic polymer electronic auxiliary
  • Supported type Au catalyst containing organic polymer electronic auxiliary
  • Supported type Au catalyst containing organic polymer electronic auxiliary

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Au / TiO 2 -Preparation of PANI catalyst

[0032] Dry titanium gel (patent number: 98115808.0) at 80°C, heat-treat the obtained solid gel at 450°C for about 3 h, grind and sieve to obtain TiO 2 carrier. Weigh 2 g TiO 2 (The particle size is 60-80 mesh) and 50 μL of aniline were added to 80 mL of 1 mol / L HCl solution, and stirred at room temperature for 30 min. Then 10 mL of an aqueous solution containing 2.45 g of ammonium persulfate was added dropwise to the above solution under magnetic stirring, and the resulting suspension was stirred and reacted for 5 hours, filtered, and washed with distilled water to remove excess ions attached to the precipitate. Dry the obtained precipitate at room temperature at 80°C to obtain TiO 2 - PANI(50) vector. According to the above steps, by changing the concentration of aniline solution, TiO 2 –PANI(100) and TiO 2 - PANI (200) vector.

[0033] Mix the carrier prepared above with 2 mL of HAuCl containing Au at a concentration of...

Embodiment 2

[0035] Catalyst Performance Evaluation

[0036] The performance evaluation of the catalyst prepared in Example 1 for catalytic oxidation of CO was carried out on a self-designed atmospheric pressure continuous flow reaction device with circulating condensed water. About 0.5 g of catalyst is packed in a quartz plate reactor (length 30mm*width 15mm*height 1mm), the catalyst particle size is about 0.2~0.3 mm (60~80 mesh), CO and O in the reaction gas 2 The contents of He were fixed at 0.3 V% and 0.3 V%, respectively, He gas was used as the balance supplementary gas, and the total flow rate of the reaction gas was about 100 mL / min. The reaction temperature is controlled at 25°C by circulating condensed water (with thermocouple detection). Agilent 7890D gas chromatograph was used to regularly analyze CO and O in the atmosphere 2 and CO 2 concentration, the detector is TCD, the packed column is TDX-01, and the result of reaction for 6 hours is used to calculate the CO conversion ...

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Abstract

The invention discloses a supported type Au catalyst containing an organic polymer electronic auxiliary, a preparation method and an application of the catalyst. The supported type Au catalyst is a high-dispersion supported type catalyst which takes TiO2 as a carrier, polyaniline as an electron donor and an Au nano particle as an active component. According to the supported type Au catalyst, the visible light CO catalysis oxidation property of the Au catalyst at room temperature is improved from the angle of the electronic auxiliary, a TiO2-PANI supporter is prepared through in-situ polymerization PANI (Polyaniline) on a TiO2 semiconductor oxide supporter, subsequently Au nano particles with visible light LAPR response are subjected to deposition-precipitation and supporting, and finally visible light illumination is introduced into a reaction system of CO catalysis oxidation. The method for introduction and photo-thermal coupling of the PANI electronic auxiliary is simple and feasible, and the application of the auxiliary in desorption of CO in the air, the removal of CO in hydrogen-enriched atmosphere in a fuel battery and the conversion of CO2 is facilitated.

Description

technical field [0001] The invention belongs to the field of visible light catalytic oxidation CO removal, in particular to conductive polymer polyaniline in Au / TiO 2 The role of electronic additives in the system and the method of improving the catalytic oxidation of CO removal by Au catalyst through photothermal coupling. Background technique [0002] CO is a flammable and explosive gaseous pollutant. Incomplete combustion exhaust gas of hydrocarbons, gas in mines and exhaust gas from household gas stoves, etc., all contain a large amount of carbon monoxide. When the CO content in the air is 2.0 × 10 -5 When the concentration reaches 1.2%, people will die within 1-3 minutes. The removal of CO has become one of the main environmental issues and has attracted widespread attention. [0003] Usually, under normal conditions, the oxidation and removal of CO requires high temperature, high energy consumption, and explosion accidents may occur. The traditional commonly used...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/38B01D53/86B01D53/62
CPCY02A50/20
Inventor 戴文新杨凯陈旬王绪绪刘平付贤智
Owner FUZHOU UNIV
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