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Aluminum-loaded noble metal monolithic catalyst as well as preparation method and application thereof

A monolithic catalyst and precious metal technology, applied in the field of air purification, can solve the problems of cumbersome catalyst preparation process, high energy consumption in the preparation process, and restrictions on popularization and application, and achieve good market application value and promotion prospects, and the effect of low product and low price

Pending Publication Date: 2020-04-24
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This leads to the preparation process of the catalyst is too cumbersome, and the preparation process consumes a lot of energy, which increases the preparation cost and limits the popularization and application of metal carrier-supported noble metal monolithic catalysts in the field of VOCs purification and treatment.

Method used

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  • Aluminum-loaded noble metal monolithic catalyst as well as preparation method and application thereof
  • Aluminum-loaded noble metal monolithic catalyst as well as preparation method and application thereof
  • Aluminum-loaded noble metal monolithic catalyst as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] 1. Soak the metal aluminum honeycomb carrier with a length, width and height of 165×165×215mm and a mass of 66g in 0.5mol / L pickling solution for 20min, take it out and rinse it with water;

[0035] 2. Put the acid-washed metal aluminum honeycomb carrier into the precious metal precursor liquid (0.04mmol / L palladium chloride and 1mmol / L sodium chloride), and continue to react in a constant temperature water bath at 40°C for about 5 hours, then take it out and rinse with water clean;

[0036] 3. Dry the material obtained in step 2 at 100° C. to a constant weight to prepare a monolithic catalyst supported by metal aluminum and Pd metal.

[0037] This embodiment obtains that the mass content of noble metal Pd in ​​the overall catalyst is 0.02%, and its catalytic combustion purification activity to toluene is at the reaction temperature T when the conversion rate of toluene is 10% and 90%. 10 = 192°C and T 90 = 261°C.

Embodiment 2

[0039] 1. Put the metal aluminum honeycomb carrier with a length, width and height of 165×165×215mm and a mass of 66g in 2.5mol / L pickling solution for 5 minutes, take it out and rinse it with water;

[0040] 2. Then put the pickled metal aluminum honeycomb carrier into the precious metal precursor liquid (0.10mmol / L palladium chloride and 2mmol / L ethylenediamine), and continue to react in a constant temperature water bath at 60°C for about 3 hours, then take out the water rinse off;

[0041] 3. Dry the material obtained in step 2 at 100° C. to a constant weight to prepare a monolithic catalyst supported by metal aluminum and Pd metal.

[0042] The mass content of noble metal Pd in ​​the monolithic catalyst obtained in this embodiment is 0.05%, and its catalytic combustion purification activity to toluene is at the reaction temperature T when the conversion rate of toluene is 10% and 90%. 10 =186°C and T 90 = 252°C.

Embodiment 3

[0044] 1. Soak the metal aluminum honeycomb carrier with a length, width and height of 165×165×215mm and a mass of 66g in 1.5mol / L pickling solution for 10min, take it out and rinse it with water;

[0045] 2. Then put the pickled metal aluminum honeycomb carrier into the noble metal precursor liquid (0.21mmol / L palladium chloride and 3mmol / L sodium edetate), and continue to react in a constant temperature water bath at 70°C for about 3h Then remove and rinse with water;

[0046] 3. Dry the material obtained in step 2 at 100° C. to a constant weight to prepare a monolithic catalyst supported by metal aluminum and Pd metal.

[0047]The mass content of noble metal Pd in ​​the monolithic catalyst obtained in this embodiment is 0.10%, and its catalytic combustion purification activity to toluene is at the reaction temperature T when the conversion rate of toluene is 10% and 90%. 10 = 183°C and T 90 = 229°C.

[0048] figure 1 with image 3 They are the physical picture and SEM ...

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Abstract

The invention belongs to the technical field of air purification, and discloses an aluminum-loaded noble metal monolithic catalyst as well as a preparation method and application thereof. The monolithic catalyst is prepared by the following steps: soaking an aluminum carrier in a pickling solution, taking out the soaked aluminum carrier, and washing the aluminum carrier with water; putting the pickled aluminum carrier into a noble metal precursor solution, carrying out a water bath reaction at 40-70 DEG C, taking out the aluminum carrier, and washing the aluminum carrier with water; and finally, drying the aluminum carrier until the weight of the aluminum carrier becomes constant. The noble metal precursor solution is an aqueous solution of one of palladium chloride and chloroplatinic acidand any one of ethylene diamine, sodium chloride, glycine, and sodium ethylene diamine tetraacetate. Under a condition that the content of noble metals in the monolithic catalyst is very low (0.02-0.15 wt.%), the monolithic catalyst shows an excellent low-temperature purification performance, can be ignited at 154-192 DEG C, and achieves a complete purification effect on toluene pollutants at 205-261 DEG C.

Description

technical field [0001] The invention belongs to the technical field of air purification, and more specifically relates to an aluminum-supported noble metal monolithic catalyst and its preparation method and application. Background technique [0002] Volatile organic compounds (referred to as VOCs, such as toluene, etc.) are considered to be one of the important precursors of PM2.5, which is extremely harmful to human health and environmental ecology. The current catalytic combustion method is one of the most effective methods to deal with VOCs, and its core is the catalyst. Among them, noble metal-supported monolithic catalysts are widely used in the field of VOCs pollution control due to their superior low-temperature and high-efficiency purification performance. The main materials of the regular supports (such as honeycomb, foam, wire mesh and other shapes) commonly used in supported monolithic catalysts are metal and ceramics. Compared with the structured carrier made o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/44B01J35/00B01J35/04B01J37/16F23G7/07
CPCB01J23/44B01J37/16F23G7/07F23G2209/14B01J35/393B01J35/56Y02A50/20
Inventor 李永峰许泽华封颖邬嘉豪关健康
Owner GUANGDONG UNIV OF TECH
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