CN101530799A - Nitrogen oxide catalyst-sorbent and preparation method - Google Patents
Nitrogen oxide catalyst-sorbent and preparation method Download PDFInfo
- Publication number
- CN101530799A CN101530799A CN 200910049393 CN200910049393A CN101530799A CN 101530799 A CN101530799 A CN 101530799A CN 200910049393 CN200910049393 CN 200910049393 CN 200910049393 A CN200910049393 A CN 200910049393A CN 101530799 A CN101530799 A CN 101530799A
- Authority
- CN
- China
- Prior art keywords
- sorbent
- catalyst
- molecular sieve
- nitrogen oxide
- sieve carrier
- 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.)
- Granted
Links
Abstract
A nitrogen oxide catalyst-sorbent and a preparation method thereof belong to the technical field of catalyst. The catalyst-sorbent comprises the components as follows according to mass percentage: 1-10% of transition metal oxide and 5-45% of alkali carbonate or hydroxide, and molecule sieve carrier being the margin. The catalyst-sorbent prepared by the invention adopts alkaline 5A molecule sieve catalyst-sorbent loaded with transition metal oxide, has dual function of catalyzing and adsorbing NOx, and has the performances of high transformation adsorption rate of NOx, large adsorption capacity and long penetration period. When the content of NOx is 2-20ppm, the transformation adsorption rate of NOx can reach 60-99% at a normal temperature.
Description
Technical field
What the present invention relates to is a kind of Catalysts and its preparation method of chemical material technical field, specifically is a kind of nitrogen oxide catalyst-sorbent and preparation method thereof.
Background technology
All contain a large amount of NO in thermal power plant discharged flue gas, the motor-vehicle tail-gas
x, and wherein the content of NO is general all greater than 90%.NO
xIt is the one of the main reasons that causes environmental problems such as acid rain, photochemical fog, ozone hole.Therefore, control and minimizing NO
xDischarging become the environmental issue that countries in the world press for solution.At present, remove NO
xMethod mainly contain on-catalytic method and catalysis method two big classes.The on-catalytic method mainly comprises wet absorption method, solid absorption method, electron beam irradiation method etc.These methods often exist that equipment is huge, operating cost is high, cause secondary pollution problems.Catalysis method is a kind of NO of removing that studies morely at present
xMethod, its key technology is that exploitation is active high, selectivity is high, good stability, the strong catalyst of anti-malicious ability.
Molecular sieve is a kind of alumino-silicate compound with cubic lattice, mainly connects to form spacious skeleton structure by sial by oxo bridge, and uniform duct, a lot of apertures and marshalling, hole that internal surface area is very big are arranged in structure.Molecular sieve can be the different molecule of shape diameter, the molecule that polarity degree is different, and the molecule that boiling point is different, the molecular separation that degree of saturation is different comes.The molecular sieve catalyst series is to remove one of catalyst that nitrogen oxide is studied the earliest, and it is the most extensive to the research of the absorption property of containing metal molecular sieve, it comprises and contains the base metal molecular sieve system and contain the noble metal molecular sieve system, mainly studies this two molecular sieve analogs system to NO
xThe performance of SCR.Japan removes NO at adsorbent of molecular sieve
xMore research has been carried out in the aspect, has proposed some and has been applicable to the NO that removes of low concentration, atm number
xMethod, its core is the preparation to sorbing material.These methods need be at different exhaust gas source configuration technical process, and the industrialization report is few.Molecular sieve catalyst is carried out modification, can increase molecular sieve NO
xAdsorption capacity, the activity of raising molecular sieve increases time of break-through, the part but the molecular sieve catalyst after the modification still comes with some shortcomings is higher as active temperature.
Find through retrieval prior art, Chinese invention patent application publication number CN1401412A has announced a kind of " catalyst for purification of nitrogen oxides and preparation thereof ", the catalyst that this technology is prepared is the 5A molecular sieve catalyst of a kind of load iron, molybdenum, have nitrogen oxide catalytic conversion height, water-resistance, with low cost, advantage such as the preparation method is simple, but it just has high catalytic activity in 300～550 ℃ of temperature ranges, is not suitable under the normal temperature catalysis absorption to nitrogen oxide.
Find by retrieval again, Chinese invention patent application publication number CN1470328A has announced a kind of " support type catalyst for purification of nitrogen oxides and preparation ", the catalyst that this technology is prepared be a kind of on molecular sieve load the catalyst for purification of nitrogen oxides that contains molybdenum, copper bi-metal oxide is arranged.This catalyst activity height, active temperature interval are wide, stability is high, the preparation method is simple, with low cost.But this catalyst need just have high activity in 360～470 ℃ of temperature ranges, is not suitable under the normal temperature catalysis absorption to nitrogen oxide equally.
Summary of the invention
The present invention is directed to the prior art above shortcomings, a kind of nitrogen oxide catalyst-sorbent and preparation method thereof is provided, be the alkaline 5A molecular sieve catalytic adsorbent of carrying transition metal oxide, have catalysis and absorption NO
xDual performance, and have NO
xPerformances such as conversion adsorption rate height, adsorption capacity is big, time of break-through is long.Under the normal temperature condition, at NO
xContent is 2～20ppm, to NO
xThe conversion adsorption rate can reach 60～99%.
The present invention is achieved by the following technical solutions:
Nitrogen oxide catalyst-sorbent involved in the present invention, its mass percent component is: 1～10% transition metal oxide and 5～45% alkali carbonate or hydroxide, surplus are molecular sieve carrier.
Described transition metal oxide is meant: a kind of or its combination in iron oxide, cupric oxide or the manganese oxide;
Described alkali carbonate or hydroxide are meant: a kind of or its combination in sodium carbonate, potash, NaOH or the potassium hydroxide;
Described molecular sieve carrier is meant: 5A molecular sieve, the granularity of this molecular sieve carrier are 20～40 orders.
The preparation method of aforesaid nitrogen oxide catalyst-sorbent involved in the present invention may further comprise the steps:
The first step, measure a certain amount of 5A molecular sieve, transition metal solution is made in a kind of or its combination with copper nitrate, ferric nitrate, manganese nitrate, impregnated zeolite carrier 0.5 hour, in 120 ℃ of oven dry 2～5 hours, and 500～550 ℃ of following roastings 1～5 hour, make the molecular sieve carrier after the modification, wherein active component is a kind of or its combination in iron oxide, cupric oxide or the manganese oxide;
Second step, molecular sieve carrier 3～4 hours after the modification of equi-volume impregnating dipping is adopted in a kind of in sodium carbonate liquor, solution of potassium carbonate, sodium hydroxide solution or the potassium hydroxide solution or its combination, and, make nitrogen oxide catalyst-sorbent in 120 ℃ of oven dry 4～5 hours.
Described equi-volume impregnating is meant: measure the water absorption rate of dipping 5A molecular sieve in advance, add volume required sodium carbonate liquor, solution of potassium carbonate, sodium hydroxide solution or the potassium hydroxide solution of saturated absorption according to water absorption rate then.
The Model42i-HL type NO that the present invention adopts U.S. power ﹠ light company to produce
xAnalyzer is tested, and the evaluation of absorption property is carried out in U type glass tube reactor; Test condition: it is 5～50ppm, NO and NO that unstripped gas consists of NOx content
2Ratio is about 7:3, and all the other are air; The catalyst-sorbent consumption is 4mL, granularity 20～40 orders; Feed gas volume air speed (GHSV) is 75000h
-115～25 ℃ of temperature, relative humidity 40～60%.Can obtain catalyst-sorbent of the present invention to NO according to above-mentioned test result
2Reach as high as 99% with the conversion adsorption rate of NO.
The specific embodiment
Below embodiments of the invention are elaborated: present embodiment is being to implement under the prerequisite with the technical solution of the present invention, provided detailed embodiment and concrete operating process, but protection scope of the present invention is not limited to following embodiment.
Embodiment 1: preparation contains the nitrogen oxide catalyst-sorbent of cupric oxide
Measure the 5A molecular sieve carrier that 4mL contains 2.783g and place surface plate, with copper nitrate solution impregnated zeolite carrier 0.5 hour, in 120 ℃ of oven dry 2～5 hours, and can make the molecular sieve carrier of modification in 1～5 hour 500～550 ℃ of following roastings, wherein the mass percentage content of cupric oxide is 1%.
Taking by weighing 0.500g potassium hydroxide is dissolved in the 2.8mL water and is mixed with maceration extract, the maceration extract for preparing is poured in the molecular sieve carrier of modification, flood after 3 hours and descend oven dry can make catalyst-sorbent in 4 hours at 120 ℃, wherein the mass percentage content of potassium hydroxide is 15.24%.
According to above-mentioned evaluation method the performance of catalyst-sorbent is estimated.Evaluation result is: the saturated adsorption capacity of this catalyst-sorbent is 457mg/g, to NO
2The conversion adsorption rate be 68～99%, be 80～99% to the conversion adsorption rate of NO, time of break-through is 1250 minutes.
Embodiment 2: preparation contains the nitrogen oxide catalyst-sorbent of cupric oxide
Measure the 5A molecular sieve carrier that 4mL contains 2.785g and place surface plate, with copper nitrate solution impregnated zeolite carrier 0.5 hour, in 120 ℃ of oven dry 2～5 hours, and can make the molecular sieve carrier of modification in 1～5 hour 500～550 ℃ of following roastings, wherein the mass percentage content of cupric oxide is 5%.
Taking by weighing 0.505g potassium hydroxide is dissolved in the 2.8mL water and is mixed with maceration extract, the maceration extract for preparing is poured in the molecular sieve carrier of modification, flood after 3 hours and descend oven dry can make catalyst-sorbent in 4 hours at 120 ℃, wherein the mass percentage content of potassium hydroxide is 15.35%.
According to above-mentioned evaluation method the performance of catalyst-sorbent is estimated.Evaluation result is: the saturated adsorption capacity of this catalyst-sorbent is 525mg/g, to NO
2The conversion adsorption rate be 99%, be 96～99% to the conversion adsorption rate of NO, time of break-through is 1400 minutes.
Embodiment 3: preparation contains the nitrogen oxide catalyst-sorbent of iron oxide
Measure the 5A molecular sieve carrier that 4mL contains 2.784g and place surface plate, with iron nitrate solution impregnated zeolite carrier 0.5 hour, in 120 ℃ of oven dry 2～5 hours, and can make the molecular sieve carrier of modification in 1～5 hour 500～550 ℃ of following roastings, wherein the mass percentage content of iron oxide is 5%.
Taking by weighing 0.501g potassium hydroxide is dissolved in the 2.8mL water and is mixed with maceration extract, the maceration extract for preparing is poured in the molecular sieve carrier of modification, flood after 3 hours and descend oven dry can make catalyst-sorbent in 4 hours at 120 ℃, wherein the mass percentage content of potassium hydroxide is 15.25%.
According to above-mentioned evaluation method the performance of catalyst-sorbent is estimated.Evaluation result is: the saturated adsorption capacity of this catalyst-sorbent is 432mg/g, to NO
2The conversion adsorption rate be 58～93%, be 72～98% to the conversion adsorption rate of NO, time of break-through is 1150 minutes.
Embodiment 4: preparation contains the nitrogen oxide catalyst-sorbent of manganese dioxide
Measure the 5A molecular sieve carrier that 4mL contains 2.780g and place surface plate, with manganese nitrate solution impregnated zeolite carrier 0.5 hour, in 120 ℃ of oven dry 2～5 hours, and can make the molecular sieve carrier of modification in 1～5 hour 500～550 ℃ of following roastings, wherein the mass percentage content of manganese dioxide is 1%.
Taking by weighing 0.501g potassium hydroxide is dissolved in the 2.8mL water and is mixed with maceration extract, the maceration extract for preparing is poured in the molecular sieve carrier of modification, flood after 3 hours and descend oven dry can make catalyst-sorbent in 4 hours at 120 ℃, wherein the mass percentage content of potassium hydroxide is 15.26%.
According to above-mentioned evaluation method the performance of catalyst-sorbent is estimated.Evaluation result is: the saturated adsorption capacity of this catalyst-sorbent is 440mg/g, to NO
2The conversion adsorption rate be 60～99%, be 77～99% to the conversion adsorption rate of NO, time of break-through is 1200 minutes.
Embodiment 5: preparation contains the nitrogen oxide catalyst-sorbent of manganese dioxide
Measure the 5A molecular sieve carrier that 4mL contains 2.780g and place surface plate, with manganese nitrate solution impregnated zeolite carrier 0.5 hour, in 120 ℃ of oven dry 2～5 hours, and can make the molecular sieve carrier of modification in 1～5 hour 500～550 ℃ of following roastings, wherein the mass percentage content of manganese dioxide is 5%.
Taking by weighing 0.503g potassium hydroxide is dissolved in the 2.8mL water and is mixed with maceration extract, the maceration extract for preparing is poured in the molecular sieve carrier of modification, flood after 3 hours and descend oven dry can make catalyst-sorbent in 4 hours at 120 ℃, wherein the mass percentage content of potassium hydroxide is 15.32%.
According to above-mentioned evaluation method the performance of catalyst-sorbent is estimated.Evaluation result is: the saturated adsorption capacity of this catalyst-sorbent is 500mg/g, to NO
2The conversion adsorption rate be 90～99%, be 95～99% to the conversion adsorption rate of NO, time of break-through is 1350 minutes.
Embodiment 6: preparation contains the nitrogen oxide catalyst-sorbent of manganese dioxide
Measure the 5A molecular sieve carrier that 4mL contains 2.760g and place surface plate, with manganese nitrate solution impregnated zeolite carrier 0.5 hour, in 120 ℃ of oven dry 2～5 hours, and can make the molecular sieve carrier of modification in 1～5 hour 500～550 ℃ of following roastings, wherein the mass percentage content of manganese dioxide is 5%.
Taking by weighing 0.708g potassium hydroxide is dissolved in the 2.8mL water and is mixed with maceration extract, the maceration extract for preparing is poured in the molecular sieve carrier of modification, flood after 3 hours and descend oven dry can make catalyst-sorbent in 4 hours at 120 ℃, wherein the mass percentage content of potassium hydroxide is 20.42%.
According to above-mentioned evaluation method the performance of catalyst-sorbent is estimated.Evaluation result is: the saturated adsorption capacity of this catalyst-sorbent is 511mg/g, to NO
2The catalyzed conversion adsorption rate be 99%, be 95～99% to the conversion adsorption rate of NO, time of break-through is 1400 minutes.
Embodiment 7: preparation contains the nitrogen oxide catalyst-sorbent of manganese dioxide
Measure the 5A molecular sieve carrier that 4mL contains 2.810g and place surface plate, with manganese nitrate solution impregnated zeolite carrier 0.5 hour, in 120 ℃ of oven dry 2～5 hours, and can make the molecular sieve carrier of modification in 1～5 hour 500～550 ℃ of following roastings, wherein the mass percentage content of manganese dioxide is 5%.
Taking by weighing 0.496g sodium carbonate is dissolved in the 3.6mL water and is mixed with maceration extract, the maceration extract for preparing is poured in the molecular sieve carrier of modification, flood after 3 hours and descend oven dry can make catalyst-sorbent in 4 hours at 120 ℃, wherein the mass percentage content of sodium carbonate is 15.00%.
According to above-mentioned evaluation method the performance of catalyst-sorbent is estimated.Evaluation result is: the saturated adsorption capacity of this catalyst-sorbent is 469mg/g, to NO
2The conversion adsorption rate be 74～99%, be 85～99% to the conversion adsorption rate of NO, time of break-through is 1275 minutes.
Embodiment 8: preparation contains the nitrogen oxide catalyst-sorbent of manganese dioxide
Measure the 5A molecular sieve carrier that 4mL contains 2.796g and place surface plate, with manganese nitrate solution impregnated zeolite carrier 0.5 hour, in 120 ℃ of oven dry 2～5 hours, and can make the molecular sieve carrier of modification in 1～5 hour 500～550 ℃ of following roastings, wherein the mass percentage content of manganese dioxide is 5%.
Taking by weighing 0.794g potash is dissolved in the 3.6mL water and is mixed with maceration extract, the maceration extract for preparing is poured in the molecular sieve carrier of modification, flood after 3 hours and descend oven dry can make catalyst-sorbent in 4 hours at 120 ℃, wherein the mass percentage content of potash is 22.12%.
According to above-mentioned evaluation method the performance of catalyst-sorbent is estimated.Evaluation result is: the saturated adsorption capacity of this catalyst-sorbent is 485mg/g, to NO
2The conversion adsorption rate be 81～99%, be 92～99% to the conversion adsorption rate of NO, time of break-through is 1300 minutes.
Embodiment 9: Comparative Examples
The catalyst that Comparative Examples is used is estimated this catalyst as the 5A molecular sieve that the 4mL of non-modified contains 2.761g by above-mentioned evaluation method.Evaluation result is: the saturated adsorption capacity of this purifying and catalyzing material is 23mg/g, to NO
2Adsorption rate be 54～99%, be 26～61% to the conversion adsorption rate of NO, time of break-through is 400 minutes.
Claims (6)
1, a kind of nitrogen oxide catalyst-sorbent is characterized in that, the mass percent component of this catalyst-sorbent is: 1～10% transition metal oxide and 5～45% alkali carbonate or hydroxide, surplus are molecular sieve carrier.
2, nitrogen oxide catalyst-sorbent according to claim 1 is characterized in that, described transition metal oxide is meant: a kind of or its combination in iron oxide, cupric oxide or the manganese oxide.
3, nitrogen oxide catalyst-sorbent according to claim 1 is characterized in that, described alkali carbonate or hydroxide are meant: a kind of or its combination in sodium carbonate, potash, NaOH or the potassium hydroxide.
4, nitrogen oxide catalyst-sorbent according to claim 1 is characterized in that, described molecular sieve carrier is meant: 5A molecular sieve carrier, the granularity of this molecular sieve carrier are 20～40 orders.
5, a kind of preparation method of nitrogen oxide catalyst-sorbent according to claim 1 is characterized in that, may further comprise the steps:
The first step, make transition metal solution with a kind of or its combination of copper nitrate, ferric nitrate, manganese nitrate, impregnated zeolite carrier 0.5 hour, in 120 ℃ of oven dry 2～5 hours, and 500～550 ℃ of following roastings 1～5 hour, make the molecular sieve carrier after the modification, wherein active component is a kind of or its combination in iron oxide, cupric oxide or the manganese oxide;
Second step, molecular sieve carrier 3～4 hours after the modification of equi-volume impregnating dipping is adopted in a kind of in sodium carbonate liquor, solution of potassium carbonate, sodium hydroxide solution or the potassium hydroxide solution or its combination, and, make nitrogen oxide catalyst-sorbent in 120 ℃ of bakings 4～5 hours.
6, the preparation method of nitrogen oxide catalyst-sorbent according to claim 5, it is characterized in that, equi-volume impregnating described in second step is meant: measure the water absorption rate of dipping 5A molecular sieve in advance, add volume required sodium carbonate liquor, solution of potassium carbonate, sodium hydroxide solution or the potassium hydroxide solution of saturated absorption according to water absorption rate then.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100493934A CN101530799B (en) | 2009-04-16 | 2009-04-16 | Nitrogen oxide catalyst-sorbent and preparation method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100493934A CN101530799B (en) | 2009-04-16 | 2009-04-16 | Nitrogen oxide catalyst-sorbent and preparation method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101530799A true CN101530799A (en) | 2009-09-16 |
| CN101530799B CN101530799B (en) | 2011-01-05 |
Family
ID=41101785
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009100493934A Expired - Fee Related CN101530799B (en) | 2009-04-16 | 2009-04-16 | Nitrogen oxide catalyst-sorbent and preparation method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101530799B (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101791561A (en) * | 2010-04-22 | 2010-08-04 | 华中科技大学 | Desulphurization and denitration catalyst and preparation method thereof |
| CN103977680A (en) * | 2014-05-19 | 2014-08-13 | 华东理工大学 | Room temperature catalytic oxidation-solid alkali absorption method for purifying nitrogen oxide of semi-closed space |
| CN105642225A (en) * | 2014-11-10 | 2016-06-08 | 中国石油天然气股份有限公司 | Method for preparing adsorbent for deacidification of unsaturated acid ester |
| CN106076112A (en) * | 2016-06-03 | 2016-11-09 | 阳煤集团深州化工有限公司 | One removes N simultaneously2o and NOxmethod |
| CN109154448A (en) * | 2016-03-22 | 2019-01-04 | 生命生态世界股份有限公司 | The mechanical system of capture and conversion polluted gas, and the method for purification air |
| CN109759035A (en) * | 2019-03-12 | 2019-05-17 | 清华大学 | NOxAdsorbent and its preparation method and application |
| CN111120871A (en) * | 2020-03-30 | 2020-05-08 | 中国石油大学胜利学院 | Method for preparing functional oil drag reducer by using waste 5A molecular sieve for olefin raw material dehydration |
| WO2020133574A1 (en) * | 2018-12-27 | 2020-07-02 | 天津大学 | Method for removing, recycling, and reusing nitrogen oxide in combustion exhaust |
| CN112452337A (en) * | 2020-10-21 | 2021-03-09 | 南京工业大学 | Low-temperature efficient denitration agent and preparation method thereof |
-
2009
- 2009-04-16 CN CN2009100493934A patent/CN101530799B/en not_active Expired - Fee Related
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101791561A (en) * | 2010-04-22 | 2010-08-04 | 华中科技大学 | Desulphurization and denitration catalyst and preparation method thereof |
| CN103977680A (en) * | 2014-05-19 | 2014-08-13 | 华东理工大学 | Room temperature catalytic oxidation-solid alkali absorption method for purifying nitrogen oxide of semi-closed space |
| CN105642225A (en) * | 2014-11-10 | 2016-06-08 | 中国石油天然气股份有限公司 | Method for preparing adsorbent for deacidification of unsaturated acid ester |
| CN105642225B (en) * | 2014-11-10 | 2018-07-10 | 中国石油天然气股份有限公司 | A kind of preparation method of adsorbent for unsaturated acid ester depickling |
| CN109154448A (en) * | 2016-03-22 | 2019-01-04 | 生命生态世界股份有限公司 | The mechanical system of capture and conversion polluted gas, and the method for purification air |
| CN106076112A (en) * | 2016-06-03 | 2016-11-09 | 阳煤集团深州化工有限公司 | One removes N simultaneously2o and NOxmethod |
| WO2020133574A1 (en) * | 2018-12-27 | 2020-07-02 | 天津大学 | Method for removing, recycling, and reusing nitrogen oxide in combustion exhaust |
| CN109759035A (en) * | 2019-03-12 | 2019-05-17 | 清华大学 | NOxAdsorbent and its preparation method and application |
| CN109759035B (en) * | 2019-03-12 | 2020-06-02 | 清华大学 | NOxAdsorbent and preparation method and application thereof |
| CN111120871A (en) * | 2020-03-30 | 2020-05-08 | 中国石油大学胜利学院 | Method for preparing functional oil drag reducer by using waste 5A molecular sieve for olefin raw material dehydration |
| CN111120871B (en) * | 2020-03-30 | 2020-06-19 | 中国石油大学胜利学院 | Method for preparing functional oil drag reducer by using waste 5A molecular sieve for olefin raw material dehydration |
| CN112452337A (en) * | 2020-10-21 | 2021-03-09 | 南京工业大学 | Low-temperature efficient denitration agent and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101530799B (en) | 2011-01-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101530799B (en) | Nitrogen oxide catalyst-sorbent and preparation method | |
| CN102423688B (en) | Preparation method for walnut shell active carbon adsorbent for purifying low concentration phosphine | |
| CN102527404B (en) | Medium/low temperature SCR (Selective Catalytic Reduction) denitration catalyst with gamma-Al2O3 as carrier and preparation method thereof | |
| CN101602018B (en) | Method for preparing rare-earth element doped composite metal oxide mercury removal catalyst | |
| CN104056658A (en) | Low-temperature sulfur-resistant denitration catalyst and preparing method thereof | |
| CN110893312A (en) | Novel high-efficiency desulfurizer and preparation method thereof | |
| CN109794248A (en) | A kind of low cost catalyst for denitrating flue gas and its preparation, application method | |
| CN106669670A (en) | Preparation method of flue gas desulfurization agent | |
| CN108479845B (en) | Denitration catalyst and preparation method thereof | |
| CN102274733B (en) | Catalyst used for catalytically oxidizing NO and preparation method thereof | |
| CN101318124A (en) | Method for preparing molecular sieve adsorption agent for low-concentration hydrogen phosphide purification | |
| CN109433251B (en) | Bi-component supported catalyst for olefin catalytic combustion process and preparation and application thereof | |
| EP4032611A1 (en) | Composite material and use thereof in desulfurization | |
| CN114768755A (en) | Regenerated flue gas dechlorinating agent and preparation method thereof | |
| CN111871433B (en) | Fly ash solid acid catalyst, and preparation method and application thereof | |
| CN114984913A (en) | Preparation method and application of novel carbon capture material | |
| CN111558372B (en) | Medium-low temperature supported nano copper oxide particle catalyst and preparation method and application thereof | |
| CN109772441B (en) | Catalyst with shell-core structure and preparation method and application thereof | |
| CN106744714A (en) | A kind of technique that sulfur dioxide Sulphuric acid is reclaimed from flue gas | |
| CN103055894B (en) | Catalyst for deoxygenation of calcium carbide furnace gas and method preparation thereof | |
| CN101564684A (en) | Method for preparing transitional metal ion Co modified adsorbent for purifying low-concentration phosphine | |
| CN112390269A (en) | Preparation method of molecular sieve for purifying diesel vehicle tail gas | |
| CN110681255A (en) | Reactant for flue gas desulfurization and denitrification and preparation method thereof | |
| CN102059115A (en) | CO normal-temperature catalytic oxidation catalyst and preparation method thereof | |
| CN111889106B (en) | Compound and preparation method and application 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 | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110105 Termination date: 20130416 |