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Preparation method of low-temperature denitration carbon-based catalyst

A carbon-based catalyst, low-temperature denitrification technology, applied in the direction of catalyst activation/preparation, catalyst carrier, chemical instruments and methods, etc., to achieve the effect of long-term denitrification activity

Inactive Publication Date: 2018-09-28
YANCHENG DONGBO ENVIRONMENT PROTECTION TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the research on the modification of carbon-based materials for denitrification has attracted extensive attention, there are few reports on the nitriding modification of carbon-based materials with nitrogen-containing organic compounds

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Design a kind of preparation method of low-temperature denitrification carbon-based catalyst, comprising the following steps:

[0021] S1. Calcination pretreatment: choose activated carbon as raw material and add it to a closed calciner, N 2 High-temperature calcining and reaming under continuous feeding conditions to obtain pretreated activated carbon;

[0022] S2. Strong acid modification: add the pretreated activated carbon into a strong acid solution and soak for 2 hours to obtain modified activated carbon;

[0023] S3. Rinse and dry: Rinse the modified activated carbon with deionized water for 1 hour. The deionized water is sprayed in a circular manner, and then dry the modified activated carbon after the acid solution has been rinsed out at low temperature;

[0024] S4, calcining molding: add the dried modified activated carbon into the closed heating furnace under N 2 The high-temperature calcination molding under the condition of continuous feeding makes the b...

Embodiment 2

[0030] Design a kind of preparation method of low-temperature denitrification carbon-based catalyst, comprising the following steps:

[0031] S1. Calcination pretreatment: choose activated carbon as raw material and add it to a closed calciner, N 2 High-temperature calcining and reaming under continuous feeding conditions to obtain pretreated activated carbon;

[0032] S2. Strong acid modification: add the pretreated activated carbon into a strong acid solution and soak for 3 hours to obtain modified activated carbon;

[0033] S3. Rinse and dry: Rinse the modified activated carbon with deionized water for 2 hours, the deionized water is sprayed in a circular manner, and then dry the modified activated carbon after the acid solution has been rinsed out at low temperature;

[0034] S4, calcining molding: add the dried modified activated carbon into the closed heating furnace under N 2 The high-temperature calcination molding under the condition of continuous feeding makes the ...

Embodiment 3

[0040] Design a kind of preparation method of low-temperature denitrification carbon-based catalyst, comprising the following steps:

[0041] S1. Calcination pretreatment: choose activated carbon as raw material and add it to a closed calciner, N 2 High-temperature calcining and reaming under continuous feeding conditions to obtain pretreated activated carbon;

[0042] S2. Strong acid modification: add the pretreated activated carbon into a strong acid solution and soak for 4 hours to obtain modified activated carbon;

[0043] S3. Rinse and dry: Rinse the modified activated carbon with deionized water for 2 hours, the deionized water is sprayed in a circular manner, and then dry the modified activated carbon after the acid solution has been rinsed out at low temperature;

[0044] S4, calcining molding: add the dried modified activated carbon into the closed heating furnace under N 2 The high-temperature calcination molding under the condition of continuous feeding makes the ...

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PUM

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Abstract

The invention relates to the technical field of chemical synthesis, in particular to a preparation method of a low-temperature denitration carbon-based catalyst. The method comprises the following steps of S1, roasting pretreatment: selecting active carbon as raw materials to be added into a sealed roasting furnace; performing high-temperature roasting hole expansion under the N2 continuous introduction condition; obtaining active carbon subjected to pretreatment; S2, strong acid modification: adding the active carbon subjected to pretreatment into a strong acid solution to be soaked for 2 to6h for obtaining modified active carbon; S3, flushing and drying: flushing the modified active carbon by deionized water for 1 to 3h; using a cyclic spraying mode on the deionized water; then, performing low-temperature drying on the modified active carbon after the acid liquid is flushed away; S4, roasting shaping: adding the dried modified active carbon into the sealed heating furnace for high-temperature roasting shaping under the continuous N2 introduction condition. The prepared catalyst can realize denitration activity higher than 85 percent or more and long-time denitration stability inhigh NOX concentration and strong smoke gas flow rate.

Description

technical field [0001] The invention relates to the technical field of chemical synthesis, in particular to a preparation method of a low-temperature denitrification carbon-based catalyst. Background technique [0002] With the rapid development of the economy, the energy structure dominated by coal has greatly increased the emission of coal-fired flue gas in my country. The combustion of coal, such as the combustion of fuel in various industrial furnaces such as power plants, and the internal combustion engines of automobiles and other motor vehicles, will produce a large amount of nitrogen oxides (NO X , including N 2 O, NO, NO 2 , N 2 o 3 , N 2 o 4 and N 2 o 5 and many other compounds). Excessive emission of NOX will cause a series of environmental problems such as acid rain and photochemical smog, and pose a great threat to human health. For a long time, flue gas purification technology has mainly focused on dust removal and desulfurization, but with people's g...

Claims

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Application Information

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IPC IPC(8): B01J23/34B01J23/10B01J23/75B01J23/745B01J23/14B01J32/00B01J37/02B01J37/08B01D53/86B01D53/56
CPCB01D53/8628B01D2258/0283B01J23/10B01J23/14B01J23/34B01J23/745B01J23/75B01J37/0201B01J37/08
Inventor 刘猛王海军
Owner YANCHENG DONGBO ENVIRONMENT PROTECTION TECH CO LTD