Flue gas denitration catalyst and preparation method thereof

A denitrification catalyst and catalyst technology, applied in the direction of catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of large recycling loss, complex process flow, and large consumption, and achieve low cost of load , wide source of raw materials and high durability

Inactive Publication Date: 2021-03-16
NORTHEASTERN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the utilization of activated carbon also has limitations, such as generally requiring two-stage adsorption towers, large consumption in the adsorption process, large regeneration loss, high price and complicated process, etc.

Method used

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  • Flue gas denitration catalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Example 1, preparation of high-efficiency low-temperature catalyst samples

[0043] The commercial activated carbon was placed in a 20% nitric acid aqueous solution, stirred for 1 h, left standing for 12 h, taken out and dried, calcined at 400 °C for 0.5 h in a microwave tube furnace, and then immersed in a 4% copper nitrate solution by mass fraction. , where the volume of the solution is the volume of water absorption of the activated carbon at this time, dried, placed in a common tube furnace after drying, raised to 400°C at a rate of 10°C / min under a nitrogen atmosphere, kept at a constant temperature for 1h, and cooled naturally to room temperature. The obtained sample was immersed again in a 4% cerium nitrate solution, wherein the volume of the solution was the volume of water absorption of the activated carbon at this time, dried, and then placed in an ordinary tube furnace under nitrogen atmosphere at 10 ° C. The rate of / min was raised to 400°C, kept at a const...

Embodiment 2

[0047] Other conditions are the same as in Example 1, the difference is that the carrier is immersed in a 4% copper nitrate solution, wherein the volume of the solution is the volume of water absorption of the activated carbon at this time, and drying is carried out for 2 times in turn, and the total amount is 8 %, while cerium nitrate is also immersed twice, other conditions and test conditions are the same as 1. The catalyst had a breakthrough time of 258 min, which was stronger than Example 1.

Embodiment 3

[0049] Other conditions are the same as in Example 1, the difference is that the carrier is immersed in a 4% copper nitrate solution by mass, wherein the volume of the solution is the volume of water absorption of the activated carbon at this time, and drying is carried out 3 times in turn, and the total amount is 12 %, and cerium nitrate was also immersed for 3 times, and other conditions and test conditions were the same as 1. The catalyst had a breakthrough time of 366 min, which was stronger than Example 2.

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Abstract

The invention relates to a flue gas denitration catalyst and a preparation method thereof. The preparation method comprises the following steps: S1, modifying columnar activated carbon, obtaining a catalyst sample carrier, and measuring the water absorption rate; s2, impregnating the carrier obtained in the step S1 in a transition metal salt solution for a certain period of time by adopting an equivalent-volume impregnation method, taking the carrier out and drying the carrier, impregnating the carrier in a rare earth metal salt solution for a certain period of time, taking the carrier out anddrying the carrier to obtain a sample; s3, calcining the sample obtained in the step S2 in an inert atmosphere; and S4, dipping the sample obtained by calcining in the step S3 into the urea solutionagain for a certain period of time, taking the sample out and drying the sample to obtain the catalyst sample. According to the preparation method provided by the invention, the commercial activated carbon is modified, and the transition metal oxide, the rare earth metal oxide and the urea are uniformly loaded in the modified activated carbon, so that the catalyst sample with excellent low-temperature denitration performance is finally obtained.

Description

technical field [0001] The invention belongs to the technical field of flue gas denitration catalysts, and in particular relates to a flue gas denitration catalyst and a preparation method thereof. Background technique [0002] With the development of human beings and the advent of the industrial age, people are enjoying the fruits of civilization, but at the same time they are also chewing on the evil consequences that follow. Among them, environmental problems are the worst, especially air pollution. by NO X The resulting problems are particularly prominent, not only destroying the environment, but also endangering human health. At present, my country's NO X The pollution problem can no longer be ignored. For this reason, five departments including the Ministry of Ecology and Environment, the National Development and Reform Commission, and the Ministry of Industry and Information Technology issued the "Opinions on Promoting the Implementation of Ultra-Low Emissions in t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/02B01J37/34B01J37/02B01J37/08B01D53/86B01D53/56
CPCB01D53/8628B01D2258/0283B01J31/0271B01J2231/62
Inventor 姜涛杨广东温婧陈泊键
Owner NORTHEASTERN UNIV
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