CN104056667B - A kind of ceramic honeycomb Catalysts and its preparation method for high-temp waste gas denitration - Google Patents
A kind of ceramic honeycomb Catalysts and its preparation method for high-temp waste gas denitration Download PDFInfo
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- CN104056667B CN104056667B CN201410320803.5A CN201410320803A CN104056667B CN 104056667 B CN104056667 B CN 104056667B CN 201410320803 A CN201410320803 A CN 201410320803A CN 104056667 B CN104056667 B CN 104056667B
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Abstract
The present invention discloses a kind of ceramic honeycomb catalyzer for high-temp waste gas denitration, comprises carrier and active ingredient; Described carrier its consist of metatitanic acid 70��90wt%, glass fibre 1��5wt%, ball clay 5��25wt%, Mierocrystalline cellulose 2��5wt%, glycerine 2��6wt%; Described active ingredient its consist of cerous nitrate 20��30wt%, lanthanum nitrate 20��30wt%, aluminum nitrate 15��25wt%, cupric nitrate 25��35wt%. Disclose the preparation method of the above-mentioned ceramic honeycomb catalyzer for high-temp waste gas denitration in addition. Present invention achieves the low cost production of denitrating catalyst, the catalyzer denitration ability obtained is strong, sulfur poisoning-resistant is strong, even if also there being higher catalytic activity at low temperatures, and extends the work-ing life of catalyzer.
Description
Technical field
The present invention relates to catalyst for denitrating flue gas technical field, particularly relate to a kind of ceramic honeycomb Catalysts and its preparation method for high-temp waste gas denitration.
Background technology
Oxynitrides NOX(mainly NO and NO2) it is a kind of poisonous atmospheric polluting material, mainly come from the flue gas in fuel-burning power plant. If will containing oxynitrides NOXFlue gas unprocessed be directly discharged in air, HUMAN HEALTH and human residential environment will be caused serious pollution. " 12 " period, country proposes the harmonious environment development that economy to be depended on for existence with the mankind, and environment protection has been whole world pay attention to day by day, thus impels and atmospheric cleaning technology has been carried out big quantifier elimination both at home and abroad.
At present, prior art is to NOXPurifying treatment and gas denitrifying technology, mainly adopt selective catalytic reduction (SCR), the catalyzer that this method adopts has honeycomb fashion, flat and corrugated plate dst, and wherein cellular catalyst has uniform physicalchemical structure and stronger anti-poisoning capability and wear resistance and is widely used. The carrier that prior art cellular catalyst adopts mainly contains cordierite honeycomb ceramic, aluminum oxide, titanium dioxide etc., and with V2O5��WO3Prepare denitration catalyzer Deng as active ingredient. But currently used cellular catalyst generally also exists expensive, catalysis cost height, the catalyzer easily problem such as aging, thus is unfavorable for the development of gas denitrifying technology.
Summary of the invention
It is an object of the invention to overcome the deficiencies in the prior art, it is provided that the ceramic honeycomb catalyzer for high-temp waste gas denitration that a kind of denitration ability is strong, long service life, cost are low. Another object of the present invention is to provide the preparation method of above-mentioned ceramic honeycomb catalyzer.
The object of the present invention is achieved by the following technical programs:
A kind of ceramic honeycomb catalyzer for high-temp waste gas denitration provided by the invention, comprises carrier and active ingredient; Described carrier its consist of metatitanic acid 70��90wt%, glass fibre 1��5wt%, ball clay 5��25wt%, Mierocrystalline cellulose 2��5wt%, glycerine 2��6wt%; Described active ingredient its consist of cerous nitrate 20��30wt%, lanthanum nitrate 20��30wt%, aluminum nitrate 15��25wt%, cupric nitrate 25��35wt%. Wherein, it may be preferred that described carrier its consist of metatitanic acid 70��90wt%, glass fibre 1��5wt%, ball clay 5��15wt%, Mierocrystalline cellulose 2��5wt%, glycerine 2��6wt%.
Another object of the present invention is achieved by the following technical programs:
The above-mentioned ceramic honeycomb catalyzer for high-temp waste gas denitration provided by the invention, comprises the following steps:
(1) preparation of cellular catalyst carrier
Undertaken preparing burden by each for described carrier component and after the mixing that adds water, obtain cellular catalyst carrier by extruded, calcining;
(2) preparation of activity component impregnation liquid
Undertaken preparing burden by described active ingredient and it is mixed with the active component solution that volumetric molar concentration is 0.1��0.3mol/l; Urea is mixed with the urea soln that volumetric molar concentration is 0.1��0.3mol/l; Then according to volume ratio active component solution: urea soln=1: 1��3 mixing, and activity component impregnation liquid is obtained;
(3) coating of active ingredient
By described cellular catalyst carrier impregnation to, in activity component impregnation liquid, making cellular catalyst carrier adsorption activity component; Then the cellular catalyst carrier of adsorption activity component is carried out calcination processing, and obtain the ceramic honeycomb catalyzer for high-temp waste gas denitration.
Further, in step of the present invention (1), the consumption of water is 15��22wt% of carrier; Calcining temperature is 450��550 DEG C. Calcining temperature in described step (3) is 450��500 DEG C.
Further, the outer surface of step of the present invention (3) calcining gained catalyzer has epoxy resin, to prevent high-temp waste gas leaks.
The present invention has following useful effect:
Present invention achieves the low cost production of denitrating catalyst, the catalyzer denitration ability obtained is strong, sulfur poisoning-resistant is strong, even if also there being higher catalytic activity at low temperatures, and extends the work-ing life of catalyzer.
Below in conjunction with embodiment, the present invention is described in further detail.
Embodiment
The embodiment of the present invention is used for the ceramic honeycomb catalyzer of high-temp waste gas denitration, comprises carrier and active ingredient; Wherein, carrier consist of metatitanic acid 70��90wt%, glass fibre 1��5wt%, ball clay 5��15wt%, Mierocrystalline cellulose 2��5wt%, glycerine 2��6wt%; Active ingredient consist of cerous nitrate 20��30wt%, lanthanum nitrate 20��30wt%, aluminum nitrate 15��25wt%, cupric nitrate 25��35wt%.
The embodiment of the present invention is used for the preparation method of the ceramic honeycomb catalyzer of high-temp waste gas denitration, and its step is as follows:
(1) preparation of cellular catalyst carrier
Each for carrier component being prepared burden, the mixing that adds water, through stirring spice, after old, vacuum pugging, extrusion moulding, microwave drying shapes, obtains cellular catalyst carrier at 450��550 DEG C of temperature lower calcinations;
(2) preparation of activity component impregnation liquid
Undertaken preparing burden by active ingredient and it is mixed with the active component solution that volumetric molar concentration is 0.1��0.3mol/l; Urea is mixed with the urea soln that volumetric molar concentration is 0.1��0.3mol/l; Then according to volume ratio active component solution: urea soln=1: 1��3 mixing obtains activity component impregnation liquid after fully stirring;
(3) coating of active ingredient
By cellular catalyst carrier impregnation to, in activity component impregnation liquid, vacuumizing and make cellular catalyst carrier adsorption activity component; The cellular catalyst carrier having adsorbed active ingredient after drying, is calcined at 45��50 DEG C of temperature at 450��500 DEG C of temperature, outer surface epoxy resin after calcining, and obtain the ceramic honeycomb catalyzer for high-temp waste gas denitration.
The embodiment of the present invention one��eight each raw material composition and processing parameter are as shown in table 1.
The each raw material composition of table 1 embodiment of the present invention one��eight and processing parameter
Note: 1, the consumption of water is the mass percent of carrier.
2, active component solution: urea soln is volume ratio.
The testing method of embodiment of the present invention catalyst effect:
Preparation is containing the air of 0.1%NO with containing 0.1%NH3Air as sample gas, and respectively by the test macro that embodiment of the present invention catalyzer is housed, adopt infrared gas analyzer to measure respectively by NO and NH in sample gas after catalyzer3Content, be then converted into transformation efficiency (NO and NH3It is converted into water and nitrogen). Test result is as shown in table 2.
The test result of table 2 embodiment of the present invention catalyzer
Claims (7)
1., for a ceramic honeycomb catalyzer for high-temp waste gas denitration, comprise carrier and active ingredient; It is characterized in that: described carrier its consist of metatitanic acid 70��90wt%, glass fibre 1��5wt%, ball clay 5��25wt%, Mierocrystalline cellulose 2��5wt%, glycerine 2��6wt%; Described active ingredient its consist of cerous nitrate 20��30wt%, lanthanum nitrate 20��30wt%, aluminum nitrate 15��25wt%, cupric nitrate 25��35wt%.
2. the ceramic honeycomb catalyzer for high-temp waste gas denitration according to claim 1, it is characterised in that: described carrier its consist of metatitanic acid 70��90wt%, glass fibre 1��5wt%, ball clay 5��15wt%, Mierocrystalline cellulose 2��5wt%, glycerine 2��6wt%.
3. the preparation method of the described ceramic honeycomb catalyzer for high-temp waste gas denitration of one of claim 1-2, it is characterised in that comprise the following steps:
(1) preparation of cellular catalyst carrier
Undertaken preparing burden by each for described carrier component and after the mixing that adds water, obtain cellular catalyst carrier by extruded, calcining;
(2) preparation of activity component impregnation liquid
Undertaken preparing burden by described active ingredient and it is mixed with the active component solution that volumetric molar concentration is 0.1��0.3mol/L; Urea is mixed with the urea soln that volumetric molar concentration is 0.1��0.3mol/L; Then according to volume ratio active component solution: urea soln=1: 1��3 mixing, and activity component impregnation liquid is obtained;
(3) coating of active ingredient
By described cellular catalyst carrier impregnation to, in activity component impregnation liquid, making cellular catalyst carrier adsorption activity component; Then the cellular catalyst carrier of adsorption activity component is carried out calcination processing, and obtain the ceramic honeycomb catalyzer for high-temp waste gas denitration.
4. the preparation method of the ceramic honeycomb catalyzer for high-temp waste gas denitration according to claim 3, it is characterised in that: in described step (1), the consumption of water is 15��22wt% of carrier.
5. the preparation method of the ceramic honeycomb catalyzer for high-temp waste gas denitration according to claim 3, it is characterised in that: the calcining temperature in described step (1) is 450��550 DEG C.
6. the preparation method of the ceramic honeycomb catalyzer for high-temp waste gas denitration according to claim 3, it is characterised in that: the calcining temperature in described step (3) is 450��500 DEG C.
7. the preparation method of the ceramic honeycomb catalyzer for high-temp waste gas denitration according to claim 3, it is characterised in that: the outer surface of described step (3) calcining gained catalyzer has epoxy resin.
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| CN104707618B (en) * | 2015-03-18 | 2016-10-12 | 山东大学 | A kind of substep zontation Preparation Method of NOx absorbing and reducing bifunctional catalyst |
| CN111715204B (en) * | 2020-06-11 | 2021-03-19 | 华北电力大学 | Flat plate type SCR denitration catalyst for high-temperature flue gas and preparation method thereof |
| CN113198545A (en) * | 2021-04-05 | 2021-08-03 | 靳书艳 | Preparation method of high-temperature-resistant and abrasion-resistant honeycomb catalyst |
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| CN101036884A (en) * | 2007-04-19 | 2007-09-19 | 德清县三龙催化剂有限公司 | Titanium radicle catalyzer for thermal power plant smock air SCR denitration |
| CN101053836A (en) * | 2007-05-23 | 2007-10-17 | 中国科学院山西煤炭化学研究所 | Flue gas denitration catalyst for resisting sulfur dioxide poisoning and preparation method and application |
| CN101053838A (en) * | 2007-05-23 | 2007-10-17 | 中国科学院山西煤炭化学研究所 | Cordierite-base copper oxide/ gamma-aluminium oxide catalyst used for flue gas denitration and preparation method and application |
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| CN103252231A (en) * | 2013-05-02 | 2013-08-21 | 易能(中国)环保科技有限公司 | Denitration catalyst and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US7527776B2 (en) * | 2007-01-09 | 2009-05-05 | Catalytic Solutions, Inc. | Ammonia SCR catalyst and method of using the catalyst |
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| CN101036884A (en) * | 2007-04-19 | 2007-09-19 | 德清县三龙催化剂有限公司 | Titanium radicle catalyzer for thermal power plant smock air SCR denitration |
| CN101053836A (en) * | 2007-05-23 | 2007-10-17 | 中国科学院山西煤炭化学研究所 | Flue gas denitration catalyst for resisting sulfur dioxide poisoning and preparation method and application |
| CN101053838A (en) * | 2007-05-23 | 2007-10-17 | 中国科学院山西煤炭化学研究所 | Cordierite-base copper oxide/ gamma-aluminium oxide catalyst used for flue gas denitration and preparation method and application |
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