CN101992116B - MnMe/molecular sieve series catalysts and preparation and application thereof - Google Patents
MnMe/molecular sieve series catalysts and preparation and application thereof Download PDFInfo
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- CN101992116B CN101992116B CN200910090322.9A CN200910090322A CN101992116B CN 101992116 B CN101992116 B CN 101992116B CN 200910090322 A CN200910090322 A CN 200910090322A CN 101992116 B CN101992116 B CN 101992116B
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- molecular sieve
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Abstract
The invention relates to MnMe/molecular sieve series catalysts and preparation and application thereof. The catalysts of the invention comprise a carrier, a main active component and an auxiliary active component, wherein the carrier is selected from an MFI structural molecular sieve, a Y molecular sieve and a beta molecular sieve; the main active component is the oxides of metal Mn; and the auxiliary active component Me is selected from one or the combination of two or more oxides of transition metal or rare earth metal or alkaline earth. The preparation method comprises the following steps: respectively dissolving the metal salts of the metal Mn and the metal Me in water, putting the molecular sieve carrier into the water solution, soaking, drying to obtain the catalyst precursors, and then calcinating to obtain the catalysts. The catalysts of the invention have low operating temperature, can reduce the energy consumption and the investment cost, have very low activating temperature, can have very high activity in a wide temperature range, and also have certain sulfur-resisting and water-resisting capacities.
Description
Technical field
A kind of catalyst that the present invention relates to use in air pollution control technique, relates in particular to a kind of catalyst of MnMe/ molecular sieve series, can be used for low temperature NH
3selective reduction NOx catalyst; The invention still further relates to preparation method and the purposes of this catalyst.
Background technology
Nitrogen oxide (NO
x) be one of main air pollutants that cause the series of problems such as the broken ring ball ecological environment such as acid rain, photochemical fog, be also the Focal point and difficult point that current atmospheric environment is administered.2005, national NO
xtotal emission volumn reaches 1,800 ten thousand tons of left and right, and power industry discharge capacity accounts for 1/2, estimates the year two thousand twenty whole nation NO
xdischarge capacity will reach 2,900 ten thousand tons of left and right.China announced and implemented " fossil-fuel power plant atmospheric pollutant emission standard " in July, 2004, to the NO of thermal power plant
xemission request has increased significantly, and denitrating flue gas is another major fields of state control power plant emission pollutant after flue gas desulfurization.
SCR (SCR) denitration technology is that denitration efficiency is the highest, the most ripe denitration technology.This technology, was promoted and has applied in the thermal power plant of the countries such as Japan, West Europe, the U.S. rapidly, and become denitrating flue gas mainstream technology from 1977 since Japanese commercialization.What commercialization SCR denitration technology used is mainly vanadium titanium System Catalyst, and the active window temperature of this System Catalyst is generally 350～400 ℃, and before being placed in desulfurizing dust-collector, such catalyst has anti-SO
2the advantages such as ability is strong, operating temperature.But the subject matter that this type of catalyst exists is: operating temperature is higher than 350 ℃, and energy consumption cost with high investment is large, is easily poisoned by the heavy metals such as the arsenic in dust and alkali metal.For preventing or reducing SO
2with the impact of dust on SCR catalyst, SCR catalyst is placed in to air preheater (being economizer), deduster and desulfurizer afterwards comparatively reasonable, but because the temperature of flue gas after desulfurization and dedusting is lower, generally lower than 150 ℃, heat again therefore must to flue gas, this will increase system energy consumption and operating cost greatly, and for this reason, exploitation low-temperature denitration catalyst becomes one of study hotspot of denitrating catalyst.
In recent years, Chinese scholars was to low temperature NH
3selective reduction NO
xcatalyst has carried out large quantity research.Mn oxide enjoys the concern of Chinese scholars, wherein pure MnO
x, natural manganese ores, MnO
x/ Al
2o
3, MnO
x/ TiO
2, MnO
x/ AC, MnO/ molecular sieve and at MnO
x/ Al
2o, MnO
x/ TiO
2, MnO
xthe catalyst that carries out modification on/AC, MnO/ molecular sieve basis, has good activity 110～350 ℃ of temperature ranges.By MnO
xload on Al
2o
3, TiO
2and ZrO
2on carrier, find that support impact supports MnO
xthe activity of catalyst.MnO
x/ Al
2o
3catalyst, has good activity 110～350 ℃ of temperature ranges, but SO
2add make catalyst activity decline.MnO
x/ TiO
2catalyst is in the time of 150 ℃, and NO conversion ratio is greater than 90%.At MnO
x/ TiO
2other metal of middle interpolation (as Fe, Ce etc.) can significantly improve catalyst activity, and catalyst has certain anti-sulphur water repelling property, but Detitanium-ore-type TiO
2easily there is crystal transfer and make preparation condition harshness.Carrying transition metal oxide on active carbon, at the NH of NO
3in selective reduction, show good low temperature active, especially 10wt.%Fe/ACF and MnO
x/ AC/C catalyst, within the scope of 140～340 ℃, generates N
2be selectively that 100%, NO conversion ratio is also 100%, the latter has certain anti-sulphur water repelling property.Richter etc. are at NaY or NH
4load active component Mn on Y molecular sieve, the low temperature active of catalyst is good, and 130 ℃ time, NO conversion ratio is greater than 90%, and water repelling property is good.But these catalyst also exist that low temperature active is not high enough, selective undesirable, anti-SO
2the problems such as the anti-caking power of toxicity ability and active component is poor.
Summary of the invention
Object of the present invention provides a kind of catalyst of the MnMe/ molecular sieve series that can be used for ammonia selective reduction nitrogen oxide just with deficiency in order to overcome the shortcoming of above-mentioned prior art, it has very low light-off temperature and in very wide temperature range, has very high activity, and has certain anti-sulphur water resistant ability.
The present invention also provides preparation method and the purposes of above-mentioned catalyst.
The object of the invention is to realize by following technical proposal:
A catalyst for MnMe/ molecular sieve series, this catalyst is by catalyst carrier, main active component Mn and help active component Me to form, described catalyst carrier be selected from there is MFI structure molecular screen, Y zeolite and beta-molecular sieve, in one or both combinations; Described main active component Mn is the oxide of metal M n; Described one or both or the two or more combination helping in the oxide that active component Me is selected from transition metal or rare earth metal or alkaline-earth metal.
Described transition metal is Fe, Ni, Cu, Zn, Mn, Cr, V or Zr; Rare earth metal is La, Ce, Pr or Nd; Alkaline-earth metal is Mg, Ca, Sr or Ba,
The described MFI of having structure molecular screen is ZSM-5, RPSA, HTS or ZRP; Described Y zeolite is NaY, HY, NH
4y, REY, REHY, PSRY, HSRY or USY; Described beta-molecular sieve is H β or Na β, and take catalyst molecule sieve carrier quality as benchmark, the content of main activity component metal Mn is 0.5～30%, and preferred content is 0.5～15%; Helping activity component metal Me content is 0.1～20%, and preferred content is 0.1～10%.
The preparation method of catalyst series, it in the steps below:
A) by activity component metal Mn and help the corresponding slaine of activity component metal Me to be dissolved in the water respectively, the aqueous solution that obtains mixing,
B) molecular sieve carrier is inserted in (a) aqueous solution and flood, and vacuum drying obtains catalyst precursor under 30～80 ℃ of temperature, strong agitation, then catalyst precursor is placed at 300～800 ℃ to roasting 2～10 hours, obtains catalyst of the present invention.
Described slaine is nitrate and/or acetate.
The purposes of catalyst series, this catalyst series is to the NOx gas disposal in industrial waste gas or boiler smoke, for NH
3the catalyst of selective reduction NOx, reducing agent NH
3with the mol ratio of NOx be 0.8～1.1: 1, in flue gas, the concentration of NOx is 100ppm～2000ppm.
The carrier that catalyst series of the present invention is selected, the morphosis that it can change active component, plays peptizaiton and supporting role to active component, increases the effective surface area of catalyst, improves mechanical strength, improves heat-resistant stability, reduces catalyst cost.The well-regulated pore structure of molecular sieve tool, bigger serface and good heat-resistant stability.In catalyst, the introducing of molecular sieve can improve the surface area of catalyst greatly, makes active component high degree of dispersion at carrier surface, increases the effective surface area of active component.In addition, by the interaction producing between molecular sieve carrier and active component, may cause active surface to change, improve the performance of catalyst, improve the low temperature active of catalyst, thereby reach the object of selective reduction NOx at lower temperature.
Owing to taking technique scheme, make technology of the present invention compared with the prior art tool have the following advantages and effect:
1, preparation method's operating temperature of the present invention is low, reduces energy consumption and cost of investment.
2, the present invention has very low light-off temperature and in very wide temperature range, has very high activity, and has certain anti-sulphur water resistant ability.
The specific embodiment
By the following examples technical scheme of the present invention is further described.
In each embodiment, all adopt following experimental facilities and analytical method: adopt fixed-bed micro-reactor to evaluate catalyst provided by the invention at NH
3catalytic activity in selective reduction NOx reaction.Reactor adopts the quartz ampoule of internal diameter 8mm, the temperature reaction of automatic temperature control instrument control program, and programming rate is 5 ℃/min.Catalyst particles granularity is 20～40 orders, takes the sample of 0.4g, is filled in the constant temperature zone of reaction tube, prepare in advance on request reacting gas, use the NOx in NO simulation industrial waste gas or boiler smoke, the NO that gas composition is 100～2000ppm, the NH of 100～2000ppm
3, the SO of 100ppm
2, all the other are N
2, gas flow is 300ml/min, reaction end gas adopts gas-chromatography and NOx analyzer to detect online.Use T
50, T
85and T
95represent NO removal efficiency corresponding reaction temperature while being 50%, 85% and 95%, reaction temperature is lower, shows that catalyst activity is better.
In following examples, activity rating condition to catalyst does not describe, and all adopts above-mentioned experiment condition.
Embodiment 1
Get manganese nitrate (Mn (NO
3)
26H
2o) 977.2g and copper nitrate (Cu (NO
3)
23H
2o) 38.0g, be dissolved in the water respectively and be made into mixed solution, then molecular sieve carrier RPSA 1000g is inserted in the aqueous solution and flooded, constantly stir, under 30 ℃ of temperature, vacuum condition, evaporating water obtains catalyst precursor, by above-mentioned catalyst precursor 800 ℃ of roastings 2 hours, obtain catalyst of the present invention, take molecular sieve supported weight as benchmark, the load capacity of this catalyst Mn is 30%, the load capacity of Cu is 1%, and the catalyst of making is: Mn (30) Cu (1)/PSRY.
This catalyst series is for NH
3nOx in selective reduction flue gas, reducing agent NH
3with the mol ratio of NOx be 1.1: 1.0, in flue gas, the concentration of NOx is 100ppm.NO removal efficiency corresponding reaction temperature T while being 50%, 85% and 95%
50, T
85and T
95be respectively: 140 ℃, 200 ℃ and 235 ℃.
Embodiment 2
Get manganese nitrate 488.6g and lanthanum nitrate (La (NO
3)
36H
2o) 155.9g, be dissolved in the water respectively and be made into mixed solution, then molecular sieve carrier HZSM-51000 gram is inserted in the aqueous solution and flooded, constantly stir, under 50 ℃ of temperature, vacuum condition, evaporating water obtains catalyst precursor, by above-mentioned catalyst precursor 300 ℃ of roastings 10 hours, obtain catalyst of the present invention, take molecular sieve supported weight as benchmark, the load capacity of this catalyst Mn is 15%, the load capacity of La is 5%, is designated as: Mn (15) La (5)/HZSM-5.
This catalyst series is for NH
3in the reaction of selective reduction NOx, reducing agent NH
3with the mol ratio of NOx be 1.0: 1.0, in flue gas, the concentration of NOx is 1000ppm.NO removal efficiency corresponding reaction temperature T while being 50%, 85% and 95%
50, T
85and T
95be respectively: 140 ℃, 200 ℃ and 245 ℃.
Embodiment 3
Take manganese nitrate 162.9g, cerous nitrate (Ce (NO
3)
36H
2o) 247.9g and ferric nitrate (Fe (NO
3)
29H
2o) 144.7g, is dissolved in the water respectively and is made into mixed solution, by 1000g NH
4y molecular sieve carrier is inserted in the aqueous solution and is flooded, constantly stir, under 70 ℃ of temperature, vacuum condition, evaporating water obtains catalyst precursor, above-mentioned catalyst precursor, 300 ℃ of roastings 5 hours, is obtained to catalyst of the present invention, take molecular sieve supported weight as benchmark, the load capacity of this catalyst Mn is 5%, the load capacity of Ce is that the load capacity of 8%, Fe is 2%, is designated as: Mn (15) Ce (5) Fe (2)/NH
4y.
This catalyst series is for NH
3in the reaction of selective reduction NOx, reducing agent NH
3with the mol ratio of NOx be 0.8: 1.0, in flue gas, the concentration of NOx is 600ppm.NO removal efficiency corresponding reaction temperature T while being 50%, 85% and 95%
50, T
85and T
95be respectively: 150 ℃, 210 ℃ and 230 ℃.
Embodiment 4
Take manganese nitrate 260.6g and ferric nitrate 7.2g, be dissolved in the water respectively and be made into mixed solution, molecular sieve carrier ZRP 1000g is inserted in the aqueous solution and flooded, constantly stir, under 80 ℃ of temperature, vacuum condition, evaporating water obtains catalyst precursor, by above-mentioned catalyst precursor 500 ℃ of roastings 4 hours, obtain catalyst of the present invention, take molecular sieve supported weight as benchmark, the load capacity of this catalyst Mn is 8%, the load capacity of Cu is 0.1%, is designated as: Mn (8) Cu (0.1)/ZRP.
This catalyst series is for NH
3in the reaction of selective reduction NOx, reducing agent NH
3with the mol ratio of NOx be 1.0: 1.0, in flue gas, the concentration of NOx is 2000ppm.NO removal efficiency corresponding reaction temperature T while being 50%, 85% and 95%
50, T
85and T
95be respectively: 170 ℃, 220 ℃ and 270 ℃.
Embodiment 5
Get manganese nitrate 16.3g, calcium nitrate (Ca (NO
3)
24H
2o) 58.9g and metavanadic acid ammonia (NH
4vO
3) 229.6g is dissolved in the water respectively and is made into mixed solution, H beta-molecular sieve carrier 1000g is inserted in the aqueous solution and flooded, constantly stir, under 70 ℃ of temperature, vacuum condition, evaporating water obtains catalyst precursor, by above-mentioned catalyst precursor 400 ℃ of roastings 3 hours, obtain catalyst of the present invention, take molecular sieve supported weight as benchmark, the load capacity of this catalyst Mn is 0.5%, the load capacity of Ca is 10%, the load capacity of vanadium is 10%, is designated as: Mn (0.5) Ca (1) V (10)/H β.
This catalyst series is for NH
3in the reaction of selective reduction NOx, reducing agent NH
3with the mol ratio of NOx be 1.0: 1.0, in flue gas, the concentration of NOx is 600ppm.NO removal efficiency corresponding reaction temperature T while being 50%, 85% and 95%
50, T
85and T
95be respectively: 120 ℃, 170 ℃ and 230 ℃.
Embodiment 6
Get manganese nitrate 162.9g, cobalt acetate (Co (CH
3cOO)
24H
2o) 422.0g and ferric nitrate 723.3g, they are soluble in water respectively, be dissolved in the water respectively and be made into homogeneous mixture solotion, after REY molecular sieve 300g and RPSA molecular sieve 700g are mixed, insert in the aqueous solution and flood, constantly stir, in 60 ℃ of temperature, under vacuum condition, evaporating water obtains catalyst precursor, by above-mentioned catalyst precursor 600 ℃ of roastings 3 hours, obtain catalyst of the present invention, take molecular sieve supported weight as benchmark, the load capacity of this catalyst Mn is 5%, the load capacity of Co is 1.0%, the load capacity of Fe is 3%, be designated as: Mn (5) Co (10) Fe (10)/(REY+RPSA).
This catalyst series is for NH
3in the reaction of selective reduction NOx, reducing agent NH
3with the mol ratio of NOx be 1.0: 1.0, in flue gas, the concentration of NOx is 600ppm.NO removal efficiency corresponding reaction temperature T while being 50%, 85% and 95%
50, T
85and T
95be respectively: 120 ℃, 180 ℃ and 220 ℃.
Claims (2)
1. the preparation method of a MnMe/ molecular sieve series catalyst, this catalyst is by catalyst carrier, main active component Mn and help active component Me to form, described catalyst carrier is the combination with the REY in RPSA and the Y zeolite of MFI structure molecular screen, described main active component Mn is the oxide of metal M n, described in help active component Me to be selected from one or both or the two or more combination in the oxide of transition metal or rare earth metal or alkaline-earth metal;
Take catalyst molecule sieve carrier quality as benchmark, the content of main activity component metal Mn is 0.5～15%;
Take catalyst molecule sieve carrier quality as benchmark, helping activity component metal Me content is 0.1～10%;
It is characterized in that preparing in the steps below:
A) by main activity component metal Mn and help the corresponding slaine of activity component metal Me to be dissolved in the water respectively, the aqueous solution that obtains mixing,
B) molecular sieve carrier is inserted in (a) aqueous solution and flood, and vacuum drying obtains catalyst precursor under 30～80 ℃ of temperature, strong agitation, then catalyst precursor is placed at 300～800 ℃ to roasting 2～10 hours, obtains catalyst.
2. preparation method according to claim 1, is characterized in that: described slaine is nitrate and/or acetate.
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| CN200910090322.9A CN101992116B (en) | 2009-08-10 | 2009-08-10 | MnMe/molecular sieve series catalysts and preparation and application thereof |
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| CN101992116B true CN101992116B (en) | 2014-05-28 |
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Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102671691A (en) * | 2012-05-28 | 2012-09-19 | 四川君和环保工程有限公司 | Low-temperature SCR (Selective Catalytic Reduction) denitrification catalyst, as well as preparation method and application thereof |
| CN104741142A (en) * | 2015-03-15 | 2015-07-01 | 北京工业大学 | Preparation method and application of Fe-ZSM-5 Zr and Sr doped compound catalyst |
| CN104741143A (en) * | 2015-03-15 | 2015-07-01 | 北京工业大学 | Preparation method and application of Cu-ZSM-5 doped Zr and Sr composite catalyst |
| CN104801336A (en) * | 2015-04-11 | 2015-07-29 | 桂林理工大学 | Zr-Mn-Fe/ZSM-5 complex oxide catalyst adopting NH3 to reduce NOx at low temperature as well as preparation method of Zr-Mn-Fe/ZSM-5 complex oxide catalyst |
| CN105833901B (en) * | 2016-04-30 | 2019-01-29 | 华南理工大学 | A kind of PrOx-MnOx/ SAPO-34 low-temperature SCR catalyst for denitrating flue gas and the preparation method and application thereof |
| CN106076358B (en) * | 2016-06-12 | 2019-07-02 | 南京工业大学 | A kind of cement industry low temperature SCR denitration catalyst and preparation method thereof |
| CN107930684B (en) * | 2016-10-13 | 2020-03-27 | 中国石油化工股份有限公司 | Catalyst for producing cyclohexylbenzene and preparation method thereof |
| CN107570205B (en) * | 2017-10-23 | 2020-07-28 | 上海歌通实业有限公司 | Preparation method of modified Beta molecular sieve catalyst |
| BR112021003159A2 (en) * | 2018-08-31 | 2021-05-11 | Johnson Matthey Public Limited Company | catalyst composition, catalyst article, and method for treating an exhaust gas |
| CN113117742B (en) * | 2019-12-31 | 2024-02-06 | 中国石油化工股份有限公司 | Low-temperature denitration forming catalyst and preparation method thereof |
| CN114146724B (en) * | 2021-12-01 | 2024-01-30 | 南宁师范大学 | Preparation method of modified ZSM-5 molecular sieve |
| CN115055204B (en) * | 2022-07-13 | 2024-02-09 | 中冶京诚工程技术有限公司 | Catalyst applicable to low-temperature plasma and preparation method and application thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1542090A (en) * | 2003-04-29 | 2004-11-03 | 中国石油化工股份有限公司 | Cracking catalyst containing molecular sieve and manganese |
| CN1542094A (en) * | 2003-04-29 | 2004-11-03 | 中国石油化工股份有限公司 | Cracking catalyst containing molecular sieve and manganese |
-
2009
- 2009-08-10 CN CN200910090322.9A patent/CN101992116B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1542090A (en) * | 2003-04-29 | 2004-11-03 | 中国石油化工股份有限公司 | Cracking catalyst containing molecular sieve and manganese |
| CN1542094A (en) * | 2003-04-29 | 2004-11-03 | 中国石油化工股份有限公司 | Cracking catalyst containing molecular sieve and manganese |
Non-Patent Citations (2)
| Title |
|---|
| "Low-temperature SCR of NO with NH3 over USY-supported manganese oxide-based catalysts";Gongshin Qi et al;《Catalysis Letters》;20030430;第87卷(第1-2期);第2节，表1 * |
| Gongshin Qi et al."Low-temperature SCR of NO with NH3 over USY-supported manganese oxide-based catalysts".《Catalysis Letters》.2003,第87卷(第1-2期),第2节，表1. |
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