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A preparation method of a monolithic catalyst containing potassium and zinc oxide nanorods and the resulting product and application

A technology of zinc oxide nanorods and monolithic catalysts, applied in physical/chemical process catalysts, chemical instruments and methods, mechanical equipment, etc., can solve the problems of unreported and inaccessible catalysts, and achieve high back pressure and easy implementation , high combustion activity

Active Publication Date: 2019-08-27
UNIV OF JINAN
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the coating method of existing catalysts does not allow all catalysts to fully and effectively contact with soot.
At present, K has been reported as an active component to catalyze Soot combustion (Zhang et al., Environ. Sci. Technol. 2010, 44:8254-8258, Zhang et al., Journal of Catalysis. 2010, 271:12-21, Li et al., Scientific Reports. 2014, 4(7496):4725, Lv et al., Scientific Reports. 2017, 7(1):3300.), however, the process of directly loading potassium on the monolithic catalyst is still not reported

Method used

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  • A preparation method of a monolithic catalyst containing potassium and zinc oxide nanorods and the resulting product and application
  • A preparation method of a monolithic catalyst containing potassium and zinc oxide nanorods and the resulting product and application
  • A preparation method of a monolithic catalyst containing potassium and zinc oxide nanorods and the resulting product and application

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preparation example Construction

[0029] The present invention provides a method for preparing a monolithic catalyst containing potassium and zinc oxide nanorods. The monolithic catalyst can be used as a diesel vehicle particulate filter (i.e. DPF). The preparation method comprises the following steps:

[0030] (1) Pretreatment of DPF carrier:

[0031] Put the DPF carrier into an appropriate amount of deionized water for ultrasonic cleaning, and then put it into an appropriate amount of absolute ethanol for ultrasonic washing. After cleaning, put the DPF carrier into an oven to dry.

[0032] (2) Growth of ZnO nanorods:

[0033] ①Preparation of seed solution: Prepare zinc acetate ethanol solution, stir until completely dissolved, and set aside;

[0034] ②Seed growth: put the dried DPF carrier into the zinc acetate seed solution prepared in ① and put it into an ultrasonic machine for ultrasonication, then take out the DPF carrier from the seed solution with tweezers and put it in an oven for drying . Then imm...

Embodiment 1

[0052] (1) Pretreatment of aluminum titanate carrier:

[0053] Put the aluminum titanate carrier into an appropriate amount of deionized water and ultrasonically wash it for 10 minutes, then put it into an appropriate amount of absolute ethanol and ultrasonically wash it for 10 minutes. After cleaning, put the aluminum titanate carrier into an oven and dry it at 80°C 2h.

[0054] (2) Growth of ZnO nanorods:

[0055] Prepare a zinc acetate ethanol solution with a concentration of 20 mmol / L and 100 mL (weigh 0.4390 g of zinc acetate and add it to a beaker containing 100 mL of ethanol solution, stir until completely dissolved);

[0056] Put the dry aluminum titanate carrier in (1) into The prepared zinc acetate seed solution was placed in an ultrasonic machine for ultrasonication for 1 min, and then the aluminum titanate carrier was taken out from the seed solution with tweezers and dried in an oven at 150°C for 5 min. Repeat the above-mentioned ultrasonic and drying proc...

Embodiment 2

[0062] A monolithic catalyst containing potassium and zinc oxide nanorods was prepared according to the method of Example 1, except that aluminum titanate was replaced by cordierite.

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Abstract

The invention discloses a preparation method of an integral catalyst containing potassium and zinc oxide nanorods, as well as the resulting product and application. The steps are: growing zinc oxide nanorods on an integral catalyst carrier; Potassium carbonate is supported on the integral catalyst carrier to obtain an integral catalyst. The present invention grows a uniform and regular zinc oxide nanorod structure on a monolithic catalyst carrier through in-situ growth, and then loads potassium active ingredients to form a monolithic catalyst. The catalyst can be used as a DPF to directly capture soot particles. Carry out catalytic combustion. Its preparation method is simple and easy to implement. It has low catalyst back pressure, high filtration efficiency, high soot and catalyst contact efficiency, and high catalytic soot particle combustion activity. It can realize low-temperature active regeneration of DPF and solve the problem of existing direct coating. The problems of high back pressure, low filtration efficiency and poor catalytic activity of covered catalysts have significant economic and social effects.

Description

technical field [0001] The invention relates to a method for preparing a monolithic catalyst containing potassium and zinc oxide nanorods, and also relates to the application of the monolithic catalyst in eliminating soot from diesel vehicle exhaust, belonging to the technical field of catalytic purification of diesel vehicle exhaust. Background technique [0002] In recent years, most cities in my country have suffered from severe smog. One of the main sources of smog is the soot (Soot) particles emitted by diesel vehicle exhaust. Diesel Particulate Filter (DPF for short) is the most effective technique for soot removal. In order to achieve the regeneration of DPF, the catalyst must be coated on the DPF to achieve the purpose of reducing the ignition temperature of soot combustion. However, the current catalyst coating method is to make the catalyst into a slurry and then coat it on the DPF. This coating method can easily cause the pores of the DPF to be blocked, resulting ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/232F01N3/035F01N3/20F01N3/023
CPCF01N3/023F01N3/035F01N3/20B01J27/232B01J35/23
Inventor 张昭良石巧兰刘雪松李倩辛颖王进
Owner UNIV OF JINAN
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