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A kind of preparation method of high-efficiency denitrification active catalyst
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A catalyst and active technology, applied in the field of catalysis, can solve problems such as low catalytic denitration efficiency, and achieve the effects of improved denitration efficiency, significant economic benefits, and extended service life
Active Publication Date: 2022-03-01
VALIANT CO LTD
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Problems solved by technology
[0006] Aiming at the problem of low efficiency of existing catalytic denitrification, the present invention provides a preparation method of high-efficiency denitrification active catalyst: the catalyst raw material is loaded into a denitrification reactor, and NH 3 and inert gas, heat up, and cool naturally after heat preservation, that is,
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Embodiment 1
[0012] A preparation method of an efficient denitrification active catalyst, comprising the following steps:
[0013] (1) CoMnCeTiO 2 The honeycomb extruded catalyst is loaded into the denitration reactor to test the denitration performance of the fresh sample;
[0014] (2) into NH 3 and N 2 , start to heat up;
[0015] (3) 300-350°C heat preservation for 5-6h;
[0016] (4) After the heat preservation is completed, the temperature is naturally lowered;
[0017] (5) Test the denitrification performance of the sample after activation, the test condition is: 500ppmNO x +500ppmNH 3 +10%O 2 +N 2 ,GHSV=5000h -1 .
Embodiment 2
[0019] A preparation method of an efficient denitrification active catalyst, comprising the following steps:
[0020] (1)VMoNiTiO 2 The honeycomb extruded catalyst is loaded into the denitration reactor to test the denitration performance of the fresh sample;
[0021] (2) into NH 3 and He, starting to heat up;
[0022] (3) 350-400°C heat preservation for 3-4h;
[0023] (4) After the heat preservation is completed, the temperature is naturally lowered;
[0024] (5) Test the denitrification performance of the sample after activation, the test condition is: 500ppmNO x +500ppmNH 3 +10%O 2 +500ppmSO 2 +20%H 2 O+N 2 ,GHSV=10000h -1 .
Embodiment 3
[0026] A preparation method of an efficient denitrification active catalyst, comprising the following steps:
[0027] (1)VMoTiO 2 The powder catalyst is loaded into the denitration reactor, and the denitration performance of the fresh sample is tested;
[0028] (2) into NH 3 and N 2 , start to heat up;
[0029] (3) Keep warm at 450-500°C for 1-2h;
[0030] (4) After the heat preservation is completed, the temperature is naturally lowered;
[0031] (5) Test the denitrification performance of the sample after activation, the test condition is: 500ppmNO x +500ppmNH 3 +10%O 2 +500ppmSO 2 +20%H 2 O+N 2 ,GHSV=50000h -1 .
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Abstract
The invention discloses a preparation method of a high-efficiency denitrification active catalyst. 3 Heating with inert gas, cooling naturally after heat preservation, that is to say. The beneficial effects of the present invention are: the active catalyst prepared by the method of the present invention can greatly improve the denitrification activity of the catalyst in the low temperature range, and can not only improve the denitrification activity of the catalyst in the absence of SO 2 and H 2 The denitrification efficiency under O conditions, and can improve the catalyst while containing SO 2 and H 2 The denitration efficiency under the O condition; without changing the existing catalyst preparation process, the service life of the catalyst is extended, and the economic benefits are significant; the denitration efficiency of the powder catalyst can be increased by 25%, and the denitration efficiency of the honeycomb catalyst or corrugated plate catalyst can be increased by 20%. .
Description
technical field [0001] The invention relates to the field of catalysis, belongs to air pollution control technology and environmental protection catalyst material technology, and specifically relates to a preparation method of an active catalyst for high-efficiency denitrification. Background technique [0002] Coal-dominated energy structure will lead to NO x The increase in emissions has seriously polluted the ecological environment, how to effectively eliminate NO x It has become an important topic of concern in the field of environmental protection. [0003] Among many NO x Among emission control technologies, ammoniaselective catalytic reduction technology (NH 3 -SCR) is currently one of the most widely used flue gas denitrification technologies in the world. It is widely used in flue gas denitrification in coal-fired power plants and industrial boilers. Convenience and other advantages. Catalyst is NH 3 -The core part of the SCR system, its performance directly ...
Claims
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