A kind of palladium-copper light monolithic catalyst and its preparation method and application

A monolithic catalyst, palladium-copper technology, applied in the direction of catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of heavy quality, high price, bulky, etc., to achieve performance upgrades, easy The effect of cutting and folding

Active Publication Date: 2019-02-26
SHANGHAI NAT ENG RES CENT FORNANOTECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The monolithic catalyst supports commonly used in engineering are cordierite, metal supports, etc. However, if these monolithic materials are used for the purification of pollutants at room temperature, they are expensive, heavy, bulky, and do not match existing products. shortcoming

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] After wetting 0.5 g of palladium copper / alumina catalyst with an appropriate amount of ethanol, it was dispersed in 4.5 mL of deionized water. Add 0.5 mL of styrene-acrylic emulsion dropwise to the above suspension, and stir at room temperature for 1 h to obtain an active slurry. Brush the active slurry evenly on the 100*150mm melt-blown cloth, and dry it in a blast drying oven at 70°C.

[0020] Catalyst evaluation: the feed gas component is, CO 20 ppm; the volume space velocity is 10000 h -1 ; Reaction temperature 30°C. Product analysis was performed using a carbon monoxide analyzer (Thermo, Model 48i) with a minimum detection limit of 0.04 ppm.

[0021] Test result, at 10000h -1 Under the volume space velocity, the initial CO purification rate of the obtained monolithic catalyst was 76%, and the activity did not decrease significantly after 24 hours.

Embodiment 2

[0023] After wetting 0.5 g of palladium copper / alumina catalyst with an appropriate amount of ethanol, it was dispersed in 4.5 mL of deionized water. Add 0.3 mL of styrene-acrylic emulsion dropwise to the above suspension, and stir at room temperature for 1 h to obtain an active slurry. Brush the active slurry evenly on the 100*150mm melt-blown cloth, and dry it in a blast drying oven at 70°C.

[0024] Catalyst evaluation is the same as embodiment 1, test result, at 10000h -1 Under the volume space velocity, the obtained monolithic catalyst had an initial CO purification rate of 90%, and the activity did not decrease significantly after 24 hours.

Embodiment 3

[0026] After wetting 0.5 g of palladium copper / alumina catalyst with an appropriate amount of ethanol, it was dispersed in 4.5 mL of deionized water. Add 0.8 mL of styrene-acrylic emulsion dropwise to the above suspension, and stir at room temperature for 1 h to obtain an active slurry. Brush the active slurry evenly on the 100*150mm melt-blown cloth, and dry it in a blast drying oven at 70°C.

[0027] Catalyst evaluation is the same as embodiment 1, test result, at 10000h -1 Under the volume space velocity, the initial CO purification rate of the obtained monolithic catalyst was 35%, and the activity did not decrease significantly after 24 hours.

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Abstract

The invention discloses a palladium-copper lightweight monolithic catalyst and a preparation method and application thereof. Melt-blown cloth serves as a carrier of the monolithic catalyst, palladium copper / aluminum oxide is an active component of the monolithic catalyst, and a loading amount of palladium copper / aluminum oxide which is the active component is 20%-60%. The method includes: adopting an appropriate amount of ethyl alcohol for wetting a copper / aluminum oxide catalyst, and dispersing in a certain amount of deionized water; dropwise adding an appropriate amount of styrene-acrylic emulsion into obtained suspension liquid, and stirring at the normal temperature to obtain active slurry; uniformly coating the melt-blown cloth with the active slurry, and drying to obtain the palladium-copper lightweight monolithic catalyst. The monolithic catalyst obtained according to the preparation method has advantages of light weight, low cost, easiness in cutting, folding, forming and the like, convenience in seamless joint of the monolithic catalyst with a purification module of an existing normal-temperature purification product is achieved, and performance upgrading of the existing purification product is realized.

Description

technical field [0001] The invention relates to the technical field of nano-catalysts, in particular to a palladium-copper light monolithic catalyst and a preparation method and application thereof. Background technique [0002] With the increasing pollution, there are a lot of chemical pollutants in the environment, such as carbon monoxide (CO), formaldehyde (HCHO) and so on. Although the concentrations of these pollutants are very low, they pose serious harm to human health. The efficient removal of chemical pollutants at room temperature can not only effectively reduce the concentration of pollutants in the air, but also avoid their reaction in the atmosphere to form secondary particles, which is one of the current research directions. [0003] According to literature reports, a large number of nano-powder materials that can efficiently purify chemical pollutants at room temperature have been developed. However, in practical applications, shortcomings such as piezoresis...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/72B01D53/86B01D53/62
CPCB01D53/864B01D2258/06B01J23/72B01J37/0215Y02A50/20
Inventor 何丹农赵昆峰张涛高振源袁静杨玲蔡婷金彩虹
Owner SHANGHAI NAT ENG RES CENT FORNANOTECH
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