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Honeycombed catalyst and preparation method and application thereof

A technology of honeycomb catalyst and SCR catalyst, which is applied in the field of honeycomb catalyst and its preparation, which can solve the problems of poor dispersion effect and achieve the effects of low shedding rate, excellent resistance to sulfur poisoning, and high loading capacity

Active Publication Date: 2018-11-27
BAOTOU RES INST OF RARE EARTHS +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the dispersion effect of high-viscosity catalyst slurry is not good by ultrasonic vibration method.

Method used

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  • Honeycombed catalyst and preparation method and application thereof
  • Honeycombed catalyst and preparation method and application thereof
  • Honeycombed catalyst and preparation method and application thereof

Examples

Experimental program
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Effect test

preparation example Construction

[0039]

[0040] The preparation method of the honeycomb catalyst of the present invention includes the following steps: (A') electromagnetic oscillation dispersion treatment step of SCR catalyst slurry; (A) honeycomb ceramic treatment step; (B) coating the SCR catalyst slurry after electromagnetic oscillation dispersion treatment The step of covering the honeycomb ceramic; (C) the drying and firing step.

[0041] In step (A'), the frequency of the electromagnetic oscillation is 40 to 200 kHz, preferably 80 to 180 kHz. The dispersion treatment time is 0.5-10 min, preferably 1.5-8 min, preferably 2.5-6 min. Through electromagnetic shock dispersion treatment, the secondary aggregation of high-viscosity SCR catalyst slurry can be avoided, and there is no material-in-water phenomenon. By adopting the above dispersion conditions, the components in the catalyst slurry can be uniformly dispersed, thereby increasing the loading capacity of the slurry, reducing the shedding rate, and redu...

preparation example 1

[0085] Preparation Example 1-Preparation of Cerium Glutamate

[0086] Add 1.335g of glutamic acid to 25mL of H 2 In O, heat to 65°C and stir evenly, add 2.67g of cerium carbonate and stir for 2h.

preparation example 2

[0087] Preparation Example 2-Preparation of Cerium Gluconate

[0088] Add 1.98g glucose and 2.67g cerium carbonate to 25mL of H 2 In O, heat to 60°C, stir and react for 1h.

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Abstract

The invention discloses a honeycombed catalyst and a preparation method and application thereof. The preparation method includes the step of applying SCR (selective catalytic reduction) catalyst slurry to honeycombed ceramics after electromagnetic shock dispersion. With the method, the honeycombed catalyst with high uploading rate, low expulsion rate and low blocking rate is obtained.

Description

Technical field [0001] The invention relates to a honeycomb catalyst and a preparation method and application thereof, in particular to a honeycomb catalyst capable of removing nitrogen oxides from exhaust gas of motor vehicles, and a preparation method and application thereof. Background technique [0002] The high content of nitrogen oxides in motor vehicle exhaust emissions has caused air pollution to continue to increase. Therefore, the urgency of the prevention and control of nitrogen oxides in motor vehicle exhaust NOx has become increasingly prominent. Flue gas denitration refers to the process of removing nitrogen oxides from flue gas. There are mainly three technologies for flue gas denitrification: selective catalytic reduction (SCR), selective non-catalytic reduction (SNCR) and SCR / SNCR combined use. At present, selective catalytic reduction (SCR) is considered to be the most effective method for flue gas denitration. [0003] As the core of denitration technology, den...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/30B01J23/888B01J27/224B01J27/24B01J35/02B01J35/04B01J35/10B01J37/02B01J37/34B01D53/94B01D53/56B01J35/00
CPCB01D53/9418B01J23/002B01J23/30B01J23/888B01J23/8885B01J27/224B01J27/24B01J37/0217B01J37/0219B01J37/342B01D2258/01B01J2523/00B01J35/56B01J35/40B01J35/615B01J2523/47B01J2523/69B01J2523/3712B01J2523/17B01J2523/48
Inventor 赵文怡李兆强王艳张丞王荣樊蓉蓉郭欣王雨宋立华宋燕海李园丁智勇宋静
Owner BAOTOU RES INST OF RARE EARTHS
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