High-activity and high-stability supported nanometer gold catalyst, preparation and application method

A catalyst and supported technology, applied in the field of preparation and supported nano-gold catalysts, can solve the problems of insufficient low-temperature catalytic activity, insufficient catalyst stability, poor water vapor resistance, etc. The effect of good change, storage and reaction stability, and high metal dispersion

Inactive Publication Date: 2017-01-18
YANTAI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the low-temperature catalytic activity of this material is not high enough, and its poor water vapor resistance is its fatal shortcoming: Therefore, the "oxidation tank" of this series of gas masks is filled with a large amount of catalyst, and a larger volume must be added in front of the "oxidation tank". , a heavier "dryer"
Authorized patents (1, An Lidun, Qi Shixue, Zou Xuhua, supported gold catalyst with stable catalytic performance and its preparation method,: ZL 2004100245096. WO 2006/007774 A1; 2, An Lidun, Qi Shixue, Lin Qingquan, Zou Xuhua, stable storage performance Supported

Method used

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  • High-activity and high-stability supported nanometer gold catalyst, preparation and application method
  • High-activity and high-stability supported nanometer gold catalyst, preparation and application method
  • High-activity and high-stability supported nanometer gold catalyst, preparation and application method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] 1. 10 wt.%ZnAl 2 o 4 -TiO 2 Preparation of:

[0027] Impregnation method: Weigh 3.4430g Zn(NO 3 ) 2 solution (33.44 wt.%) and 10.3944g Al(NO 3 ) 3 solution (24.85wt.%), mix, pour 10g TiO 2 Carrier (anatase type), shake quickly and evenly, impregnate, stand and age, and then in 100 o C drying 8 h, after 1000 o C roasted for 6 h to get ZnAl 2 o 4 / TiO 2 Composite carrier;

[0028] Solution combustion method: measure 1.8544g Zn(NO 3 ) 2 solution (33.44 wt.%) and 5.6136g Al(NO 3 ) 3 solution (24.85 wt.%), add 4.8ml of distilled water, then add 1.9655g of urea, and pour 5g of TiO 2 Carrier (anatase type), mix well and heat in a microwave oven or muffle furnace until the solution burns, then at 800 o C roasted for 6 h, ZnAl was also obtained 2 o 4 / TiO 2 Composite carrier.

[0029] 2. 1%Au / 10 wt.%ZnAl 2 o 4 -TiO 2 Preparation of:

[0030] Anion impregnation method: measure chloroauric acid solution (9.56g Au / L) 10.6 mL, drop Na 2 CO 3 solution unt...

Embodiment 2

[0035] 1. 10 wt.%MgAl 2 o 4 -TiO 2 Preparation of:

[0036] Impregnation method: Weigh 2.7703g Mg(NO 3 ) 2 solution (41.80 wt.%) and 13.3803g Al(NO 3 ) 3 solution (24.85wt.%), mix, pour 10g TiO 2 Carrier (P25), shake quickly evenly, impregnate, stand and age, and then in 100 o C drying 6h, after 700 o C roasted for 6 h to obtain MgAl 2 o 4 -TiO 2 Composite carrier;

[0037] Solution combustion method: Weigh 1.4965g Mg(NO 3 ) 2 solution (41.80 wt.%) and 7.2341g Al(NO 3 ) 3 Solution (24.85 wt.%), mix, add 7.0ml distilled water, then add 2.5329g urea, pour 5g TiO 2 Carrier (P25), after mixing evenly, heat in a microwave oven or muffle furnace until the solution burns, after 700 o C roasting for 4 h also yielded MgAl 2 o 4 -TiO 2 Composite carrier.

[0038] 2. 1%Au / 10 wt.%MgAl 2 o 4 -TiO 2 Preparation of:

[0039]Anion impregnation method: Measure 5.3ml of chloroauric acid solution (19.13g / L), add KOH solution dropwise until the pH value of the solution is...

Embodiment 3

[0044] 1. 10 wt.%NiAl 2 o 4 -TiO 2 Preparation of:

[0045] Immersion method: Weigh 5.0532g Ni(NO 3 ) 2 solution (22.73 wt.%) and 10.7785g Al(NO 3 ) 3 solution (24.85wt.%), mix, pour 10g TiO 2 Carrier (rutile type), let it stand for 6 h, then at 150 o C dried for 2 h, after 900 o C roasted for 8 h to obtain NiAl 2 o 4 -TiO 2 Composite carrier

[0046] Solution combustion method: Weigh 2.7302g Ni(NO 3 ) 2 solution (22.73 wt.%) and 5.8302g Al(NO 3 ) 3 solution (24.85 wt.%), mix, add 4.1ml distilled water, then add 2.0400g urea, pour 5g TiO 2 Carrier (rutile type), mix well and heat in a microwave oven or muffle furnace until the solution burns, after 800 o C roasting for 6h also yields NiAl 2 o 4 -TiO 2 Composite carrier.

[0047] 2. 1%Au / 10 wt.%NiAl 2 o 4 -TiO 2 Preparation of:

[0048] Anion impregnation method: Measure 5.3ml of chloroauric acid solution (19.13g / L), add Na 2 CO 3 solution until the solution pH value is 5, 10g NiAl 2 o 4 -TiO 2 ...

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Abstract

The invention discloses a high-activity and high-stability supported nanometer gold catalyst, preparation and an application method. An active component is Au, and a carrier is M1M2O-MOx composite oxides, wherein M1 is one or two or more of Mg, Cu, Ni and Zn, M2 is one or two or more of Al, Fe and Co, and MOx is one of Al2O3, TiO2 and SiO2. The M1M2O-MOx is prepared by adopting an impregnation method or a solution combustion method, metal M1 and M2 salts are introduced and calcinated under the temperature of 700-1200 DEG C so that M1 and M2 can generate a spinel or perovskite structure on the surface of the MOx oxides, the gold catalyst supported by the M1M2O-MOx has the advantages that the preparation process is simple, large-scale production is easy, the catalytic activity is high, and the reaction stability performance is excellent, 1% CO in air can be completely oxidized under the temperature of minus 40-50 DEG C to produce CO2, and the wide application prospect is achieved in CO2 reduction of a closed CO2 laser and air purification of the environment such as a mine self-rescuer, a safety rescue capsule, a high-rise building, a tunnel, a closed place, a submarine and a space station.

Description

technical field [0001] The invention relates to the technical field of catalysts, in particular to a supported nano-gold catalyst with high catalytic reaction activity and stable performance, which mainly but not limited to catalyzes CO oxidation. The invention also relates to a preparation method and an application method of the catalyst. Background technique [0002] At present, the vast majority of filter gas masks in my country use Hopcalite catalysts, which are composite oxide catalysts with CuO-MnOx as the main component, and are gas mask catalyst materials that have been used in World War I. However, the low-temperature catalytic activity of this material is not high enough, and its poor water vapor resistance is its fatal shortcoming: Therefore, the "oxidation tank" of this series of gas masks is filled with a large amount of catalyst, and a larger volume must be added in front of the "oxidation tank". , heavier "dry cans". The supported nano-gold catalyst can be us...

Claims

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Application Information

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IPC IPC(8): B01J23/66B01J23/89B01D53/86B01D53/62
CPCB01D53/864B01J23/002B01J23/005B01J23/66B01J23/8906B01J23/8913B01J23/892B01J23/8926B01J23/8953B01J35/006B01J2523/00B01J2523/27B01J2523/31B01J2523/47B01J2523/22B01J2523/847B01J2523/17B01J2523/845B01J2523/842B01J2523/41Y02A50/20
Inventor 祁彩霞林清泉苏慧娟孙逊李维明宋现成郑玉华安立敦
Owner YANTAI UNIV
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