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Natural gas distributed energy flue gas denitrification catalyst and its preparation process

A distributed energy and denitrification catalyst technology, which is applied in the field of natural gas distributed energy flue gas denitrification catalyst and its preparation, can solve the problems of active component loss, low denitrification efficiency, catalyst deactivation, etc., and achieve high temperature resistance and denitrification High efficiency and high activity effect

Active Publication Date: 2021-03-16
JIANGSU LONGKING COALOGIX CATALYST REGENERATION CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a natural gas distributed energy flue gas denitrification catalyst and its preparation process. The catalyst of the present invention has a high temperature resistant carrier, sintering resistance, and high activity, and can overcome the carrier titanium dioxide in the process of natural gas flue gas denitrification of existing catalysts. High-temperature crystal form changes, loss and sintering of active components lead to catalyst deactivation, low denitrification efficiency, high cost, and short service life

Method used

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  • Natural gas distributed energy flue gas denitrification catalyst and its preparation process

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Experimental program
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Effect test

Embodiment 1

[0021] 1) Grind activated alumina, zeolite molecular sieves containing transition metal oxides, and iron-nickel-chromium composite oxides into composite powders with a particle size of less than 5 μm, an average particle size of 1.5 μm, and a grain size of less than 10 nm by high-energy ball milling, and then add 2 parts by mass of silica sol, 1 part by mass of mannose gum, 0.5 parts by mass of silica fine powder, 2 parts by mass of water-soluble phenolic resin and 280 parts by mass of deionized water, mixed to obtain plastic clay;

[0022] The consumption of described activated alumina is 2 mass parts;

[0023] The zeolite molecular sieve contains 3 parts by mass of cerium oxide, 2 parts by mass of tungsten oxide and 1 part by mass of zirconia;

[0024] The iron-nickel-chromium composite oxide is prepared by plasma technology; the iron-nickel-chromium composite oxide contains 5 parts by mass of iron oxide, 3 parts by mass of nickel oxide and 2 parts by mass of chromium oxide;...

Embodiment 2

[0030] 1) Grind activated alumina, zeolite molecular sieves containing transition metal oxides, and iron-nickel-chromium composite oxides into composite powders with a particle size of less than 5 μm, an average particle size of 1.5 μm, and a grain size of less than 10 nm by high-energy ball milling, and then add 4 parts by mass of silica sol, 3 parts by mass of mannose gum, 1.5 parts by mass of silica fine powder, 4 parts by mass of water-soluble phenolic resin and 320 parts by mass of deionized water, mixed to obtain plastic mud;

[0031] The consumption of described activated alumina is 3 mass parts;

[0032] In the zeolite molecular sieve, cerium oxide accounts for 5 parts by mass, tungsten oxide accounts for 4 parts by mass, and zirconia accounts for 4 parts by mass;

[0033] The iron-nickel-chromium composite oxide is prepared by plasma technology; in the iron-nickel-chromium composite oxide, iron oxide accounts for 8 parts by mass, nickel oxide accounts for 5 parts by m...

Embodiment 3

[0039] 1) Grind activated alumina, zeolite molecular sieves containing transition metal oxides, and iron-nickel-chromium composite oxides into composite powders with a particle size of less than 5 μm, an average particle size of 1.5 μm, and a grain size of less than 10 nm by high-energy ball milling, and then add 4 parts by mass of silica sol, 3 parts by mass of mannose gum, 1.5 parts by mass of silica fine powder, 4 parts by mass of water-soluble phenolic resin and 320 parts by mass of deionized water, mixed to obtain plastic mud;

[0040] The consumption of described active aluminum oxide is 2.3 mass parts;

[0041] In the zeolite molecular sieve, cerium oxide accounts for 4 parts by mass, tungsten oxide accounts for 3 parts by mass, and zirconia accounts for 2 parts by mass;

[0042] The iron-nickel-chromium composite oxide is prepared by plasma technology; in the iron-nickel-chromium composite oxide, iron oxide accounts for 6 parts by mass, nickel oxide accounts for 4 part...

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Abstract

The invention provides a natural gas distributed energy flue gas denitration catalyst and a preparation method thereof. The catalyst provided by the invention has a high temperature resistant carrier,resistance to sintering, and high activity. In a natural gas flue gas denitration process, the carrier titanium dioxide of the catalyst has crystal changes, and loss and sintering of active components due to high temperature, rendering the problems of catalyst deactivation, low denitration efficiency, higher cost, and short life. According to the invention, the problems can be overcome.

Description

technical field [0001] The invention relates to a natural gas distributed energy flue gas denitrification catalyst and a preparation process thereof. Background technique [0002] Natural gas distributed energy refers to the use of natural gas as fuel to achieve energy cascade utilization through combined cooling, heating, and electricity. The comprehensive energy utilization efficiency is above 70%, and modern energy supply methods are realized near the load center. Although clean air is used as energy, under lean combustion conditions, NOx emissions will be generated, which will pollute the atmosphere, and the flue gas temperature is high (458-550°C), which is much higher than the operation of denitrification catalysts in traditional coal-fired power plants Temperature (300-420°C). If vanadium-tungsten-titanium denitration catalysts for coal-fired power plants are operated in flue gas above 420°C for a long time, high-temperature sintering of titanium dioxide will occur, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/888B01D53/86B01D53/56
CPCB01D53/8628B01D2258/0283B01J23/002B01J23/888B01J2523/00B01J2523/3712B01J2523/48B01J2523/69B01J2523/67B01J2523/842B01J2523/847
Inventor 张涛何伟唐晓玉顾莉莉李扬
Owner JIANGSU LONGKING COALOGIX CATALYST REGENERATION CO LTD
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