CN104888759A - Method and device for modifying or regenerating SCR catalyst by utilizing lanthanum salt or cerium salt - Google Patents
Method and device for modifying or regenerating SCR catalyst by utilizing lanthanum salt or cerium salt Download PDFInfo
- Publication number
- CN104888759A CN104888759A CN201510292480.8A CN201510292480A CN104888759A CN 104888759 A CN104888759 A CN 104888759A CN 201510292480 A CN201510292480 A CN 201510292480A CN 104888759 A CN104888759 A CN 104888759A
- Authority
- CN
- China
- Prior art keywords
- scr catalyst
- catalyst
- salt
- lanthanum
- cerium
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Catalysts (AREA)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
Abstract
The invention discloses a method and a device for modifying or regenerating an SCR catalyst by utilizing a lanthanum salt or cerium salt. According to the invention, an industrial SCR catalyst is taken as a carrier, and the lanthanum salt or cerium salt is taken as a modifier or a regenerant to modify or regenerate the SCR catalyst. The devices used for realizing the method comprises a manipulator, a conveyer belt, a guide wheel, a gear, an ultrasonic immersing tank and a calcining furnace. By using the device disclosed by the invention to carry out hoisting transportation and immersing on a catalyst module, time and labor cost are saved, and the operation is convenient and quick. Compared with a single SCR catalyst, a proper quantity of lanthanum nitrate or cerium nitrate is added to the lanthanum salt or cerium salt modified catalyst, and therefore, the working temperature window of the SCR catalyst is widened, and the poison tolerance of the catalyst is improved.
Description
Technical field
The invention belongs to coal steam-electric plant smoke denitration field, relate to a kind of method and the device that are carried out modification and regeneration by lanthanum salt, cerium salt pair SCR catalyst.
Background technology
The nitrogen oxide (NOx) of coal-burning power plant's discharge is one of Air Pollutant Discharge.Nitrogen oxide is the main cause forming the various environmental problems such as acid rain, photochemical fog, greenhouse effects and depletion of the ozone layer, also has impact to the health of human body.NOx mainly NO and NO2 that combustion of fossil fuel produces, the NO that toxicity is less is oxidized to NO2 in atmosphere very soon, but NO2 is more stable, and toxicity is larger.NOx and volatile organic matter produce photochemical fog through a series of photochemical reaction under the radiation of sunshine.The spread effect of photochemical fog to eyes and respiratory system is very strong, and disease can be caused even dead.NOx is oxidized generation nitric acid in atmosphere, has increased the weight of the situation of the regional acid rain of China together with sulfuric acid.
Selective-catalytic-reduction denitrified (SCR) technology is widely used in China coal-burning power plant's nitrogen oxide and reduces discharging, and is current most widely used general and the most effective gas denitrifying technology.As the core of SCR technology, in actual motion, there are following three problems in catalyst: (1) due to running environment severe, easily there is the phenomenons such as poisoning, dust stratification, active matter loss and inactivation, cause catalyst activity to reduce even inactivation.Catalyst is very low for service life, is generally 16000 ~ 24000h.(2) SCR catalyst active window is narrower, and light-off temperature is high, and when cigarette temperature is lower, its denitration efficiency is also low.(3) the SCR catalyst cost changing inactivation is high, uneconomical.Therefore, in the urgent need to developing low-temperature SCR catalyst and the regeneration techniques of Study of Catalyst.
Research shows, utilizes rare earth element can improve catalyst denitration activity to the research that SCR catalyst carries out modification and improve its anti-poisoning performance, is conducive to the economy that SCR catalyst is run.The application of rare earth element in various catalyst is very extensive, because its good oxygen storage capacity, Lattice Oxygen are removable, cation variable valency and many catalytic action have contacting of essence.For SCR denitration, the doping of rare earth element can improve catalyst oxygen storage capacity, improves catalyst activity and anti-poisoning performance, can improve catalyst heat endurance simultaneously.As a kind of rich reserves and the raw material of nontoxic low price, CeO2 is paid close attention to widely in catalysis, is commonly used in the three-effect catalysis process of vehicle exhaust at present, and it also has very high NOx removal activity at low temperatures simultaneously.Therefore Ce is very extensive as the research of catalyst promoter.Peng (Peng Y, Li J, Shi W, et al.Design Strategies for Development of SCR Catalyst:Improvement of Alkali Poisoning Resistance and Novel Regeneration Method [J] .Environmental science & technology, 2012,46 (22): 12623-12629) research shows, cerium oxide can not only improve the selective of SCR activity N2, also has repellence to alkalosis.(the Chen such as Chen, L., Li, J.H., Ge, M.F., Promotional Effect of Ce-doped V2O5-WO3/TiO2with Low Vanadium Loadings for Selective Catalytic Reduction of NOx by NH3 [J] .Journal of Physical Chemistry C, Dec 17,2009,113 (50), pp 21177-21184) by adding Ce as auxiliary agent in V2O5-WO3/TiO2 catalyst, reaching and improving catalyst activity and the load capacity object reducing V and W in catalyst.
Domestic patent related to this is as follows:
(1) patent CN102240543 discloses a kind of CeO for denitration
2-ZrO
2base SCR catalyst preparation method, adopts cordierite honeycomb ceramic as carrier, at supported on carriers cerium pick solid solution active coating, and load Nb on active coating
2o
5oxide skin(coating), catalyst denitration efficiency is more than 80%, and operating temperature window can reach 250 ~ 450 DEG C.
(2) patent CN102294237 discloses a kind of manganese system load-type low-temperature SCR catalyst, take TIO2 as carrier, uses infusion process to add the oxide of manganese and tungsten, calcines after oven dry under 400 ~ 500 DEG C of conditions.
(3) patent CN102294237A discloses a kind of manganese system load low-temperature SCR catalyst, take titanyl compound as carrier, with the oxide of manganese for active component, with the oxide of tungsten for co-catalyst, makes catalyst through dipping and calcining.
Above patent starts to prepare catalyst by preparing carrier, its complex process; Need through twice calcining, preparation time is longer; Manual operation, complex steps is easily made mistakes, and takes time and effort.In sum, be badly in need of a kind of technique simple, be easy to industrialized SCR catalyst modification or process engineering for regenerating, to meet industrial growing out of stock demand.
Summary of the invention
In order to solve above-mentioned prior art Problems existing, the object of the present invention is to provide a kind of method and the device that are carried out modification and regeneration by lanthanum salt, cerium salt pair SCR catalyst, to widen SCR catalyst active temperature windows, improving anti-poisoning capability.Use this device to simplify the operation step, raise the efficiency, save use cost.
In order to achieve the above object, the present invention adopts following technical scheme:
Carried out the method for modification or regeneration by lanthanum salt or cerium salt pair SCR catalyst, with industrial SCR catalyst for carrier, for modifier or regenerative agent, modification or regeneration are carried out to SCR catalyst with cerium salt or lanthanum salt, specifically comprise the steps:
Step 1: by the cerous nitrate of preset quality or lanthanum nitrate soluble in water, stir, make maceration extract;
Step 2: SCR catalyst module that is fresh or inactivation be impregnated in maceration extract A and flood, soaks 4 ~ 6h; Wherein, in maceration extract in Ce elements or lanthanum element and catalyst titanium elements mol ratio be (0.03 ~ 0.1): 1;
Step 3: catalyst module after step 2 being flooded is placed in the material mouth of calcining furnace, then sends into calcining furnace after taking out and being filtered dry, in calcining furnace in 100 ~ 120 DEG C of air atmospheres dry 12h;
Step 4: the dried catalyst of step 3 calcines 4 ~ 6h in the air atmosphere of 250 ~ 550 DEG C, obtains the SCR catalyst of lanthanum salt or the modification of cerium salt or regeneration.
Described SCR catalyst is V2O5/WO3-TiO2 type catalyst.
Before dipping, first adopt ultrasonic wave or bubbling mode to shake 10 ~ 15 minutes in described step 2, then flood placement.
Realize the device of said method, comprise the ultrasonic immersing pond 10 being loaded with maceration extract 6, by SCR catalyst modular transportation that is fresh or inactivation to the mechanical gripper 1 in ultrasonic immersing pond 10 and conveyer belt 2, by driven by motor, it rotates and then drives directive wheel 3 and the gear 4 of conveyer belt 2 motion, also comprises the calcining furnace 7 catalyst module after dipping being carried out drying with material mouth 8.
Every research shows, take Ce as the denitration activity that auxiliary agent effectively can improve SCR catalyst, alleviates the sintering of catalyst in calcination process, reduces specific area and the pore volume loss of catalyst, strengthens the heat endurance of catalyst, the service life of extending catalyst.Meanwhile, the oxygen storage capacity of CeO2 makes the oxygen concentration of catalyst surface improve, and NO is oxidized to NO2, quick SCR occurs and reacts, and reaction rate improves.
Compared to the prior art comparatively, the present invention possesses following advantage:
1) lanthanum salt of the present invention, cerium salt modified catalyst with the addition of appropriate lanthanum nitrate or cerous nitrate relative to single SCR catalyst, widen the operating temperature window of SCR catalyst, and improve the anti-poisoning capability of catalyst: when temperature reaches 260 DEG C, the catalyst denitration efficiency of 5% cerium and lanthanum load reaches 100%, and the fresh catalyst of load C e denitration efficiency 260 DEG C time is not only 57.8%, at 340 DEG C, the denitration efficiency of the poisoning rear fresh catalyst of compound is down to 19% by 100%, and under the same terms, the denitration efficiency that 5% cerium or lanthanum add catalyst is down to 65% by 100%.
2) the present invention also can be used for decaying catalyst regeneration.Commercial denitration SCR catalyst is expensive, its preparation and replacement cost high, regenerated by the catalyst of infusion process to inactivation according to lanthanum salt and cerium salt, substantially can recover that it is active.
3) use apparatus of the present invention to carry out hoisting transportation and dipping to catalyst module, save time and human cost, convenient and swift.
Accompanying drawing explanation
Fig. 1 is SCR catalyst modification of the present invention or regenerating unit structural representation.
Fig. 2 is that the present invention adds the impact of Ce on the anti-K poisoning performance of SCR catalyst.
Fig. 3 is that Ce load capacity of the present invention is on the impact of SCR catalyst denitration efficiency η.
Fig. 4 is that the present invention adds the impact of Ce on the anti-compound poisoning performance of SCR catalyst.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the present invention is described in further details.
As shown in Figure 1, SCR catalyst that is to be modified or regeneration is positioned over conveyer belt 2 and transports, and puts it into ultrasonic immersing pond 10, be soaked in the maceration extract 6 prepared in advance by mechanical gripper 1 lifting.Use the mode of ultrasonic vibration or bubbling can strengthen the osmotic effect of modifier before impregnation, improve the uniformity of dipping.Be positioned over the material mouth 8 of calcining furnace 7 after the SCR catalyst of having flooded being filtered dry by lifting by mechanical gripper 1 again after having flooded, then send into calcining furnace 7, in calcining furnace 7, drying and calcining are carried out to SCR catalyst, to strengthen the intensity of SCR catalyst.The directive wheel 3 that in figure, conveyer belt 2 is rotated by driven by motor and gear 4 drive it to move, and directive wheel 3 and gear 4 are supported by bracing frame 9.
Embodiment 1
(1) 1g cerous nitrate is added in 50ml distilled water, be stirred to and dissolve completely, obtain maceration extract;
(2) the SCR catalyst module 8.3g getting K poisoning and deactivation is positioned in maceration extract conveyer belt 2 is transported to made by step (1) and floods, and first uses ultrasonic oscillation 10 minutes, rear standing immersion 4h;
(3) mechanical gripper 1 by step (2) flood after catalyst module take out be filtered dry after, be placed in the material mouth 8 of calcining furnace 7, then send calcining furnace 7 to, in calcining furnace 7 in 100 ~ 120 DEG C of air atmospheres dry 12h;
(4) in step (3), dried catalyst calcines 4h in the air atmosphere of 250 DEG C, obtains the SCR catalyst of cerium salt modification.
SCR catalyst modified for the present embodiment cerous nitrate is used for denitrating flue gas, and air speed is than being 6000h
-1, flue gas NOX content is 180mg/m3, and rate of air sucked in required is 30L/min, ammonia nitrogen mol ratio is 1.2, flue gas flow 2.28m3/h, when reaction temperature is 250 DEG C, denitration efficiency is about 96%, and unmodified SCR catalyst under the same conditions denitration efficiency be only 14%, as shown in Figure 2.
Embodiment 2
(1) 1.2g cerous nitrate is added in 50ml distilled water, be stirred to and dissolve completely, obtain maceration extract;
(2) be positioned over by fresh SCR catalyst module 10g in maceration extract conveyer belt 2 is transported to made by step (1) and flood, first bubbling shakes 10 minutes, rear standing immersion 4.5h;
(3) mechanical gripper 1 by step (2) flood after catalyst module take out be filtered dry after, be placed in the material mouth 8 of calcining furnace 7, then send calcining furnace 7 to, in calcining furnace 7 in 100 ~ 120 DEG C of air atmospheres dry 12h;
(4) in step (3), dried catalyst calcines 4.5h in the air atmosphere of 325 DEG C, obtains the SCR catalyst of cerium salt modification.
SCR catalyst modified for the present embodiment cerous nitrate is used for denitrating flue gas, and air speed is than being 6500h
-1, flue gas NOX content is 220mg/m3, and rate of air sucked in required is 30L/min, ammonia nitrogen mol ratio is 1.2, flue gas flow 2.28m3/h, when reaction temperature is 290 DEG C, denitration efficiency is about 98%, and unmodified fresh SCR catalyst under the same conditions denitration efficiency be only 52%, as shown in Figure 3.
Embodiment 3
(1) 1.25g cerous nitrate is added in 50ml distilled water, be stirred to and dissolve completely, obtain maceration extract;
(2) be positioned over by the SCR catalyst module 7.6g of compound poisoning and deactivation in maceration extract conveyer belt 2 is transported to made by step (1) and flood, first bubbling shakes 12 minutes, rear standing immersion 5h;
(3) mechanical gripper 1 by step (2) flood after catalyst module take out be filtered dry after, be placed in the material mouth 8 of calcining furnace 7, then send calcining furnace 7 to, in calcining furnace 7 in 100 ~ 120 DEG C of air atmospheres dry 12h;
(4) in step (3), dried catalyst calcines 5h in the air atmosphere of 400 DEG C, obtains the SCR catalyst of cerium salt modification.
SCR catalyst modified for the present embodiment cerous nitrate is used for denitrating flue gas, and air speed is than being 7000h
-1, flue gas NOX content is 260mg/m3, and rate of air sucked in required is 30L/min, ammonia nitrogen mol ratio is 1.2, flue gas flow 2.28m3/h, when reaction temperature is 325 DEG C, denitration efficiency is about 98%, and unmodified SCR catalyst under the same conditions denitration efficiency be only 12%, as shown in Figure 4.
Embodiment 4
(1) 1.4g lanthanum nitrate is added in 50ml distilled water, be stirred to and dissolve completely, obtain maceration extract;
(2) the SCR catalyst module 8.0g of poisoning for K rear inactivation is positioned in maceration extract conveyer belt 2 is transported to made by step (1) and floods, first use ultrasonic oscillation 15 minutes, rear standing immersion 5.5h;
(3) mechanical gripper 1 by step (2) flood after catalyst module take out be filtered dry after, be placed in the material mouth 8 of calcining furnace 7, then send calcining furnace 7 to, in calcining furnace 7 in 100 ~ 120 DEG C of air atmospheres dry 12h;
(4) in step (3), dried catalyst calcines 5.5h in the air atmosphere of 475 DEG C, obtains the SCR catalyst of lanthanum salt modification.
SCR catalyst after the present embodiment is Lanthanum nitrate modified is used for denitrating flue gas, and air speed is than being 7500h
-1, flue gas NOX content is 300mg/m3, and rate of air sucked in required is 30L/min, ammonia nitrogen mol ratio is 1.2, flue gas flow 2.28m3/h, when reaction temperature is 370 DEG C, denitration efficiency is about 99%, and unmodified SCR catalyst under the same conditions denitration efficiency be only 22%, as shown in Figure 3.
Embodiment 5
(1) 1.5g lanthanum nitrate is added in 50ml distilled water, be stirred to and dissolve completely, obtain maceration extract;
(2) fresh SCR catalyst module 8.5g is positioned in maceration extract conveyer belt 2 is transported to made by step (1) and floods, first use ultrasonic oscillation 15 minutes, rear standing immersion 6h;
(3) mechanical gripper 1 by step (2) flood after catalyst module take out be filtered dry after, be placed in the material mouth 8 of calcining furnace 7, then send calcining furnace 7 to, in calcining furnace 7 in 100 ~ 120 DEG C of air atmospheres dry 12h;
(4) in step (3), dried catalyst calcines 6h in the air atmosphere of 550 DEG C, obtains the SCR catalyst of lanthanum salt modification.
SCR catalyst after the present embodiment is Lanthanum nitrate modified is used for denitrating flue gas, and air speed is than being 8000h
-1, flue gas NOX content is 330mg/m3, and rate of air sucked in required is 30L/min, ammonia nitrogen mol ratio is 1.2, flue gas flow 2.28m3/h, when reaction temperature is 400 DEG C, denitration efficiency is about 99%, and unmodified SCR catalyst under the same conditions denitration efficiency be only 69%, as shown in Figure 2.
Claims (4)
1. carried out the method for modification or regeneration by lanthanum salt or cerium salt pair SCR catalyst, it is characterized in that: with industrial SCR catalyst for carrier, with cerium salt or lanthanum salt for modifier or regenerative agent carry out modification or regeneration to SCR catalyst.Specifically comprise the steps:
Step 1: by the cerous nitrate of preset quality or lanthanum nitrate soluble in water, stir, make maceration extract;
Step 2: impregnated in maceration extract A by SCR catalyst module that is fresh or inactivation, soaks 4 ~ 6h; Wherein, in maceration extract in Ce elements or lanthanum element and catalyst titanium elements mol ratio be (0.03 ~ 0.1): 1;
Step 3: catalyst module after step 2 being flooded is placed in the material mouth of calcining furnace, then sends into calcining furnace after taking out and being filtered dry, in calcining furnace in 100 ~ 120 DEG C of air atmospheres dry 12h;
Step 4: the dried catalyst of step 3 calcines 4 ~ 6h in the air atmosphere of 250 ~ 550 DEG C, obtains the SCR catalyst of lanthanum salt or the modification of cerium salt or regeneration.
2. method of being carried out modification or regeneration by lanthanum salt or cerium salt pair SCR catalyst according to claim 1, be is characterized in that: described SCR catalyst is V2O5/WO3-TiO2 type catalyst.
3. method of being carried out modification or regeneration by lanthanum salt or cerium salt pair SCR catalyst according to claim 1, be is characterized in that: before dipping, first adopt ultrasonic wave or bubbling mode to shake 10 ~ 15 minutes in described step 2, then flood placement.
4. realize the device of method described in claim 1, it is characterized in that: comprise the ultrasonic immersing pond (10) being loaded with maceration extract (6), by SCR catalyst modular transportation that is fresh or inactivation to the mechanical gripper (1) in ultrasonic immersing pond (10) and conveyer belt (2), the directive wheel (3) that it rotates and then drive conveyer belt (2) is moved by driven by motor and gear (4), also comprise the calcining furnace (7) catalyst module after dipping being carried out drying with material mouth (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510292480.8A CN104888759A (en) | 2015-06-01 | 2015-06-01 | Method and device for modifying or regenerating SCR catalyst by utilizing lanthanum salt or cerium salt |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510292480.8A CN104888759A (en) | 2015-06-01 | 2015-06-01 | Method and device for modifying or regenerating SCR catalyst by utilizing lanthanum salt or cerium salt |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104888759A true CN104888759A (en) | 2015-09-09 |
Family
ID=54021964
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510292480.8A Pending CN104888759A (en) | 2015-06-01 | 2015-06-01 | Method and device for modifying or regenerating SCR catalyst by utilizing lanthanum salt or cerium salt |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104888759A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105772028A (en) * | 2016-03-28 | 2016-07-20 | 武汉龙净环保科技有限公司 | Regeneration method for SCR (Selective Catalytic Reduction) denitration catalyst V2O5-WO3/TiO2 |
| CN106492781A (en) * | 2016-11-03 | 2017-03-15 | 新沂市中诺新材料科技有限公司 | The modified La V of La2O5/TiO2Desulphurization catalyst |
| CN108744954A (en) * | 2018-05-28 | 2018-11-06 | 湖北中和普汇环保股份有限公司 | A kind of method of cobalt salt regeneration of deactivated SCR catalyst |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20120081914A (en) * | 2011-01-12 | 2012-07-20 | 지엠텍(주) | RECYCLING SYSTEM FOR SPENT CATALYST OF DE-NOx EQUIPMENT |
| CN103055963A (en) * | 2013-01-25 | 2013-04-24 | 上海龙净环保科技工程有限公司 | Integrated regeneration system and method of mobile SCR (Selective Catalytic Reduction) denitrification catalyst |
| CN103433081A (en) * | 2013-08-08 | 2013-12-11 | 涿州西热环保催化剂有限公司 | Regeneration method for honeycomb type SCR (Selective Catalytic Reduction) denitration catalyst |
-
2015
- 2015-06-01 CN CN201510292480.8A patent/CN104888759A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20120081914A (en) * | 2011-01-12 | 2012-07-20 | 지엠텍(주) | RECYCLING SYSTEM FOR SPENT CATALYST OF DE-NOx EQUIPMENT |
| CN103055963A (en) * | 2013-01-25 | 2013-04-24 | 上海龙净环保科技工程有限公司 | Integrated regeneration system and method of mobile SCR (Selective Catalytic Reduction) denitrification catalyst |
| CN103433081A (en) * | 2013-08-08 | 2013-12-11 | 涿州西热环保催化剂有限公司 | Regeneration method for honeycomb type SCR (Selective Catalytic Reduction) denitration catalyst |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105772028A (en) * | 2016-03-28 | 2016-07-20 | 武汉龙净环保科技有限公司 | Regeneration method for SCR (Selective Catalytic Reduction) denitration catalyst V2O5-WO3/TiO2 |
| CN106492781A (en) * | 2016-11-03 | 2017-03-15 | 新沂市中诺新材料科技有限公司 | The modified La V of La2O5/TiO2Desulphurization catalyst |
| CN106492781B (en) * | 2016-11-03 | 2019-03-12 | 上海实力机电设备成套有限公司 | La modified La-V2O5/TiO2Desulphurization catalyst |
| CN108744954A (en) * | 2018-05-28 | 2018-11-06 | 湖北中和普汇环保股份有限公司 | A kind of method of cobalt salt regeneration of deactivated SCR catalyst |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102658172B (en) | SCR denitration catalyst as well as preparation method and application thereof | |
| CN103008002B (en) | Preparation method and application of Fe and Cu composite molecular sieve catalyst | |
| CN103433034B (en) | Activated coke Supported Manganese cerium composite oxides low-temperature SCR catalyst and preparation method thereof | |
| CN107552043B (en) | Supported low-temperature SCR denitration catalyst and preparation method thereof | |
| CN102029178B (en) | Copper-based molecular sieve catalyst and preparation method thereof | |
| CN105289641B (en) | A kind of cobalt cerium-carrying manganese oxide catalyst and preparation method thereof | |
| CN103962126B (en) | Catalyst for selectively catalyzing and reducing nitrogen oxides and preparation method thereof | |
| CN101721992A (en) | Ceria-based denitration catalyst and preparation method thereof | |
| CN102225335A (en) | Denitration catalyst for flue gas and preparation method thereof | |
| CN101468314B (en) | Catalyst for low-temperature denitration of flue gas and preparation method thereof | |
| CN102974368A (en) | Deactivated SCR denitration catalyst regeneration method | |
| CN111569953B (en) | Preparation method of denitration catalyst | |
| CN103464177A (en) | Fluorine-doped ceria and attapulgite SCR denitration catalyst and preparation method thereof | |
| CN105642276A (en) | Preparation method of catalytic sample for room temperature denitration | |
| CN104888759A (en) | Method and device for modifying or regenerating SCR catalyst by utilizing lanthanum salt or cerium salt | |
| CN101804344A (en) | Manganese/carbon nanotube denitrification catalytic reduction catalyst and preparation method thereof | |
| CN101259417B (en) | Regeneration method of sulphur absorption V2O5/AC catalytic adsorption agent | |
| CN109092328A (en) | A kind of method of SCR denitration spent catalyst recovery | |
| CN111097442A (en) | Flue gas synergistic denitration and demercuration catalyst and preparation method thereof | |
| CN103127956A (en) | Low-temperature selective catalytic reduction NOx catalyst based on nanometer activated carbon microspheres and preparation method thereof | |
| CN110354915B (en) | Recycling method of alkali metal poisoned SCR denitration catalyst | |
| CN104475006B (en) | For diesel engine and the adsorbent of gasoline engine NOx storage and preparation thereof | |
| CN104998684A (en) | Rare-earth modified SCR denitrification catalyst and preparation method therefor | |
| CN102698765A (en) | Composite denitration catalyst for selectively reducing NO by propylene and preparation method thereof | |
| CN106179327A (en) | Activated coke support type manganese cerium titanium zirconium mixed oxide low-temperature SCR catalyst and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20150909 |