CN103127950A - Cu-ZSM catalyst, and preparation method and application thereof - Google Patents
Cu-ZSM catalyst, and preparation method and application thereof Download PDFInfo
- Publication number
- CN103127950A CN103127950A CN2013100569893A CN201310056989A CN103127950A CN 103127950 A CN103127950 A CN 103127950A CN 2013100569893 A CN2013100569893 A CN 2013100569893A CN 201310056989 A CN201310056989 A CN 201310056989A CN 103127950 A CN103127950 A CN 103127950A
- Authority
- CN
- China
- Prior art keywords
- zsm
- catalyst
- molecular sieve
- reaction
- microwave
- 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
The invention relates to a Cu-ZSM catalyst, and a preparation method and an application thereof. The Cu loading amount of the catalyst is 23-28% of the mass of the Cu-ZSM catalyst. The method comprises the steps that: ZSM molecular sieve is mixed and stirred with a solution comprising alkali metal ions, such that M-ZSM zeolite molecular sieve is obtained; the prepared M-ZSM molecular sieve is mixed and grinded with copper acetate; the mixture is heated in a microwave heating device and is subjected to a reaction, such that a Cu-ZSM catalyst loading Cu(AC)2 is obtained. The copper catalyst has high NO conversion rate in the application of NO removing.
Description
Technical field
The present invention relates to the Cu-ZSM Catalysts and its preparation method, be specifically related to a kind of Cu-ZSM catalyst of high-copper load capacity, and the method for using the standby described catalyst of Microwave Solid legal system.Background technology
Along with the increase of industrial expansion and vehicles number, the nitrogen oxide (NO that discharges in the atmosphere
x) amount is more and more, to environment and people's life harm.Therefore, how to take efficient denitrification, eliminate NO
xPolluting has become the research topic of paying much attention in environmental protection.Can direct catalytic decomposition NO from discovery Copper Ion Exchange type zeolite molecular sieves such as Iwamoto
xAfter, Cu-ZSM-5 has good catalytic activity and stability, be considered to the NO cartalytic decomposition effect catalyst of at present tool application prospect, and its catalytic activity is relevant with the content of copper ion.Because the ion exchange capacity of molecular sieve is limited, adopt ion-exchange to prepare the copper zeolite difficult of high-load, need to repeatedly exchange and roasting, the cycle is long and efficient is low, repeatedly after exchange and roasting, the crystal structure of molecular sieve is destroyed.Study according to people such as Xie Youchang, after being dry mixed, the carrier of many salts or oxide and high-ratio surface carries out heat treated, can spontaneously be individual layer or inferior Monolayer Dispersion, therefore utilize the solid phase dispersion method can prepare the molecular sieve catalyst of high-activity component load capacity, having prepared copper content as people such as Jia Mingjun is 8% CuCl/ZSM-5 catalyst.But the catalyst of the method preparation need to carry out long high-temperature calcination, and metal component is difficult to be controlled effectively in the distribution of molecular sieve surfaces externally and internally, can cause simultaneously the loss of active component.In addition, the active component major part exists with non-exchange state form, has affected the activity of catalyst.
The disclosed method of prior art can not obtain the high-activity component load capacity molecular sieve catalyst of (as more than 20%), and the method complex process of the catalyst of disclosed so-called high capacity amount in prior art, consume energy high, and can not control active component in the dispersion of carrier surfaces externally and internally.Therefore, its catalytic conversion efficiency for nitrogen oxide is lower, carries out good commercial Application in nitrogen oxide field that can not be in removing waste gas.
Summary of the invention
In order to address the above problem, the invention provides a kind of Cu-ZSM catalyst of high Cu load capacity, the load capacity of described Cu can reach more than 23%, a kind of method that the present invention also provides microwave-assisted solid-state reaction to prepare described Cu-ZSM catalyst, and described catalysis is removing the application of nitrogen oxides of exhaust gas.
The invention provides a kind of Cu-ZSM catalyst, the load capacity of the Cu of described catalyst is the 23-28% of described Cu-ZSM catalyst quality; Described Cu-ZSM catalyst is preferably the Cu-ZSM-11 catalyst.
The present invention also provides a kind of method of the Cu-ZSM of preparation catalyst, and it comprises the following steps:
I) ZSM molecular sieve and the solution that contains alkali metal ion are carried out mix and blend, obtain the M-ZSM zeolite molecular sieve; Described M is selected from a kind of in alkali metal; Described ZSM molecular sieve is preferably the ZSM-11 molecular sieve;
Ii) with step I) the M-ZSM molecular sieve and the Schweinfurt green mixed grinding that make, and be placed in microwave heating equipment and heat and react, obtain the Cu-ZSM catalyst of loaded Cu ion, described Schweinfurt green is preferably with the Schweinfurt green of the crystallization water.
Described M is sodium and/or potassium, is preferably sodium.
In the method for preparing the Cu-ZSM catalyst of the present invention, also comprise:
At step I i) in M-ZSM zeolite molecular sieve and Cu (AC)
2During mixed grinding, add therein organic solvent, be used for wet mix surperficial, increase intergranular contact and diffusion.
Described organic solvent preferred alcohol, more preferably volume fraction is 99% ethanol.
Step I i in the present invention) milling time of described grinding is 20-120min.
Due in microwave-assisted solid-state reaction, reactant Cu (AC)
2H
2O and ZSM molecular sieve are to add with solid state, contact each other not as in solution fully, therefore to fully grind the reaction the former two, and add a small amount of organic solvent to come the wet mix surface, increase intergranular contact and diffusion, promote the carrying out of reaction.Therefore, in order to improve initial action speed, add 99% ethanol before reaction, grind 30min.Simultaneously, Cu (AC)
2.H
2The crystallization water that contains in O can be in reaction effective microwave energy absorbing, thereby reaction is carried out more fast.
Step I i in the present invention) operating frequency of described microwave Muffle furnace is 950-2450MHz.
Step I i in the present invention) described reaction is to carry out under 160-260 ℃ in temperature, and the reaction time is 15-30min.
Described step I i) in, the mol ratio of Schweinfurt green and M-ZSM molecular sieve is 1:1～9.
Step I i in the present invention) addition of described organic solvent is the 5-25% of the gross mass of M-ZSM molecular sieve and Schweinfurt green.
The present invention also provides a kind of application of described Cu-ZSM catalyst in removing nitrogen oxides of exhaust gas that utilize.
The microwave technology of utilization of the present invention is to utilize microwave as a kind of unionized electromagnetic energy, it has Fast Heating and the special characteristics such as galvanomagnetic-effect, the principle of spontaneous dispersion on the bigger serface carrier based on metallic salt or metal oxide, active component and molecular sieve are carried out by microwave, it being heated to cause the solid ionic exchange reaction after mechanical mixture, control active component in the distribution on molecular sieve surface, with the catalyst of preparation high capacity amount, the method can make up traditional heating solid phase dispersion method shortcoming.
The beneficial effect of the inventive method is:
1, adopting the standby Cu-ZSM catalyst of Microwave Solid legal system is a kind of efficient, easy method, required time be only under the traditional heating condition ion-exchange required time 1/39, just can obtain equal or higher Cu ion load amount, can promote active component in molecular sieve surface dispersion and solid ionic exchange reaction simultaneously.
2, at high temperature (400-600 ℃) roasting of traditional heating method at least 8h just to make high capacity amount be the 8.1wt%Cu-ZSM-5 catalyst.The present invention can prepare higher Cu ion load amount Cu-ZSM catalyst than conventional method, and there are multiple cooperate and bond function in Cu species and molecular sieve on exchanged, and in the dispersion of molecular sieve outer surface more than the catalyst that the ion-exchange preparation is arranged.
3, the Activity and stabill aspect of the standby catalyst decomposing N O of Microwave Solid legal system all substantially exceeds traditional heating method and ion-exchange, and initial NO conversion ratio is up to 92.4% under oxygen free condition, and after reaction 25h, conversion ratio still maintains more than 75%.
The specific embodiment
The present invention is described in detail below in conjunction with embodiment, but scope of the present invention is not limited to following examples.
The device that uses in an embodiment of the present invention and instrument and sign condition are as follows:
1) X-ray diffraction of catalyst (XRD) is characterized on the D/MAX-1200 type X-ray diffractometer that Rigaku company produces and carries out, Cu K alpha ray, and pipe is pressed 40kV, pipe stream 30mA, 2 °/min of sweep speed, sweep limits is that 2 θ are 5～50 °.
2) infrared spectrum (IR) is characterized on the Nicolet308 type FT-IR infrared spectrometer that U.S. Thermo company produces and carries out, KBr compressing tablet, resolution ratio 4crn
-1, get 4000～400crn-1 infrared spectrum.
3) specific area and pore size distribution sign (BET) is carried out on the NOVA4000e type physical adsorption appearance of U.S. Kang Ta company, and with nitrogen adsorption volumetric determination specific area and pore structure, specific area is calculated with the BET method, pore-size distribution BJH method mensuration.
4) SEM (SEM) is characterized on the Vega TS2136MX type SEM of Czech Tescan company and completes, and the catalyst sample surface is adopted ion sputtering to carry out metal spraying and processed, observe under different amplification and take pictures.
5) in catalyst, Cu content is measured by the 5100PC type Atomic Absorption Spectrometer that U.S. Perkin-Elmer company produces.
6) reaction unit of the present invention is the little anti-experimental provision of MRT-6123 type that Beijing glad boat shield petrochemical industry Science and Technology Ltd. produces.Device is comprised of carrier gas system, reaction system, temperature control system and sampler.Reactor inside diameter is 10mm, the stainless steel tube of long 500mm, and Catalyst packing is in flat-temperature zone, reaction tube middle part.
7) in tail gas, NO concentration is detected online by the 42C type NOx analyzer that U.S. Thermo Environmental Instruments company produces.
With X
NOThe conversion ratio of expression NO,
C in formula
in(NO) be NO concentration (mol/L) in unstripped gas before reaction, C
out(NO) be exit NO concentration (mol/L) after reaction.Catalytic activity with the conversion ratio evaluate catalysts of NO.
In following examples, Cu (AC)
2Be Schweinfurt green, Cu (AC)
2.H
2O is the Schweinfurt green with the crystallization water.
The preparation of embodiment 1 catalyst
The method of Cu-ZSM-11 catalyst comprises the following steps:
I) ZSM-11 molecular sieve and excessive NaOH solution are carried out mix and blend, then through washing, suction filtration, oven dry, obtain the Na-ZSM-11 zeolite molecular sieve;
Ii) with step I) the Na-ZSM-11 molecular sieve and the Cu (AC) that make
2Mix and add 99% ethanol, fully grind 30min, then be placed in microwave heating equipment, the control operating frequency is 2450MHz, is to heat 15-30min under 160-260 ℃ in temperature, washing, filter, dry under 100 ℃, the catalyst that makes is with the MCu-ZSM-11 catalyst.
Embodiment 2: the impact of rate of charge on catalyst loadings
Preparation process such as embodiment 1 add according to different Cu (AC) in table 1
2.H
2The Cu of the mol ratio of O:ZSM-11 (AC)
2.H
2O and ZSM-11 prepare described catalyst, investigate different material than the impact of mol ratio on the catalyst cupport for preparing, and experimental result sees Table 1.
The impact of table 1 rate of charge on catalyst loadings
| Cu(AC) 2.H 2O:mZSM-11 | 1：9 | 1：7 | 1：5 | 1：3 | 1：1 |
| The load of Cu (wt%) | 2.31 | 3.66 | 5.65 | 8.96 | 23.11 |
As shown in Table 1, under microwave action, be dispersed in the molecular sieve surface Cu (AC) 2 can with the Na-ZSM-11 molecular sieve in Na
+The solid ionic exchange reaction occurs, and its solid ionic exchange capacity increases along with the increase of Cu (AC) 2 input amounts.And when the load capacity of Cu (AC) 2 in the Na-ZSM-11 molecular sieve is increased to 23.11wt%, Cu (AC)
2Still can disperse fully on the molecular sieve surface.
The impact of 3 microwave action times of embodiment on catalyst loadings
The preparation method controls respectively Cu (AC) with embodiment 1
2.H
2The mol ratio of O:ZSM-11 is 1:5 and 1:3,200 ℃ of microwave heating temperature are prepared according to microwave heating time different in table 2 and 3, investigate the time of microwave action to the impact of catalyst loadings, experimental result sees Table 2 and table 3, table 2 expression be Cu (AC)
2.H
2The impact of microwave action time on catalyst loadings when the mol ratio of O:ZSM-11 is 1:3, that table 3 represents is Cu (AC)
2.H
2When the mol ratio of O:ZSM-11 is 1:5, the microwave action time affects Cu (AC) to catalyst loadings
2.H
2The impact of microwave action time on catalyst loadings when the mol ratio of O:ZSM-11 is 1:3.
The impact of table 2 microwave action time on catalyst loadings
| Time/min | 10 | 15 | 20 | 25 | 30 |
| The load of Cu (wt%) | 2.65 | 5.11 | 6.32 | 6.26 | 5.65 |
The impact of table 3 microwave action time on catalyst loadings
| Time/min | 10 | 15 | 20 | 25 | 30 |
| The load of Cu (wt%) | 3.55 | 6.71 | 8.96 | 8.76 | 8.65 |
By table 2 and table 3 as can be known, at the temperature of microwave action, the time of microwave action is a very important factor that affects catalyst loadings.The microwave irradiation effect time is short, and solid phase reaction is incomplete, and the load capacity of Cu is low, is best but the microwave action time is 15-30min, especially makes load capacity maximum at 20min, and after the time surpassed 25min, the load capacity of Cu descended on the contrary.Therefore, rationally control the microwave action time, can improve catalyst loadings and energy savings under identical condition.
The impact of embodiment 4 microwave action temperature on catalyst loadings
Preparation process is controlled Cu (AC) with embodiment 1
2.H
2The mol ratio of O:ZSM-11 is 1:5, during the time t=20min of heating using microwave, investigates different microwave heating temperature to the impact of catalyst loadings, and experimental result sees Table 3:
The impact of table 4 microwave action temperature on catalyst loadings
| Temperature/℃ | 160 | 200 | 220 | 240 | 260 |
| The load of Cu (wt%) | 4.40 | 5.65 | 6.09 | 6.54 | 6.31 |
As shown in Table 4, when temperature during lower than 240 ℃, raising along with the microwave action temperature, the load capacity of Cu also increases thereupon, this is mainly because improve the temperature of microwave action, also just be equivalent to increase under identical condition the power of microwave action, the raising of power can be strengthened the penetration capacity of microwave, thereby has accelerated the carrying out of solid phase reaction.When the microwave action temperature was 240 ℃, the load capacity of Cu was up to 6.54wt%.After temperature surpassed 240 ℃, the load capacity of Cu began to descend, and this is mainly because surpassing Cu (AC)
2At the temperature of boiling point, caused its distillation, the loss of Cu increases.
The Performance Ratio of the Cu-ZSM-11 catalyst of the application of embodiment 5 catalyst and distinct methods preparation
Be 3000h at reaction velocity (GHSV)
-1, NO concentration (volume fraction) is 5 * 10
-3, reaction temperature is under 550 ℃, the condition of anaerobic, to have investigated respectively shown in the upper NO cartalytic decomposition effect results of property table 5 of the Cu-ZSM-11 catalyst (the load capacity 5.65wt% of Cu) that uses the distinct methods preparation.By as seen from Table 5, standby Cu-ZSM-11 catalyst its active fall of prolongation along with the reaction time in the reaction of decomposing N O of Microwave Solid legal system is less, basically reach certain stable state at reaction 10h rear catalyst, after reaction 25h, the conversion ratio of its NO still maintains more than 75%.Under same condition, the Cu-ZSM-11 catalyst of ion-exchange preparation before reaction in 15h the conversion ratio of NO drop to 57.3% by 78%, reach stable state after reaction 15h, the conversion ratio of NO maintains 57% left and right substantially.And the Cu-ZSM-11 catalyst of general heating method preparation is 89% at the conversion ratio of initial reaction stage NO, reaches stable state after reaction 15h, and the NO conversion ratio maintains 50% left and right substantially.Above experimental data shows, compares with the catalyst of ion-exchange, general heating method preparation, and the standby catalyst of Microwave Solid legal system has better catalytic activity and stability.
The Cu-ZSM-11 catalyst decomposing N O conversion ratio of table 5 distinct methods preparation
| Reaction time | The Microwave Solid method | Ion-exchange | The traditional heating method |
| 1 hour | 90% | 78% | 89% |
| 5 hours | 88% | 73% | 80% |
| 10 hours | 79% | 60% | 60% |
| 15 hours | 78% | 57.3% | 53% |
| 20 hours | 76% | 57.3% | 51% |
| 25 hours | 75.7% | 57.5% | 50% |
| 30 hours | 75.7% | 57.5% | 50% |
Claims (10)
1. Cu-ZSM catalyst, the load capacity of the Cu of described catalyst is the 23-28% of described Cu-ZSM catalyst quality; Described Cu-ZSM catalyst is preferably the Cu-ZSM-11 catalyst.
2. method for preparing Cu-ZSM catalyst according to claim 1 comprises the following steps:
I) ZSM molecular sieve and the solution that contains alkali metal ion are carried out mix and blend, obtain the M-ZSM molecular sieve; Described M is selected from a kind of in alkali metal; Described ZSM molecular sieve is preferably the ZSM-11 molecular sieve;
Ii) with step I) the M-ZSM molecular sieve and the Schweinfurt green mixed grinding that make, and be placed in microwave heating equipment and heat and react, obtain the Cu-ZSM catalyst of loaded Cu ion.
3. method according to claim 2, is characterized in that, described M is sodium and/or potassium.
4. method according to claim 2, is characterized in that, at step I i) in during with M-ZSM molecular sieve and Schweinfurt green mixed grinding, add therein organic solvent, be used for the wet mix surface, increase intergranular contact and diffusion; Wherein, described organic solvent preferred alcohol, more preferably volume fraction is 99% ethanol.
5. method according to claim 2, is characterized in that, step I i) milling time of described grinding is 20-120min.
6. the described method of any one according to claim 2-5, is characterized in that step I i) operating frequency of described microwave heating equipment is 950-2450MHz.
7. the described method of any one according to claim 2-5, is characterized in that step I i) described reaction is to carry out under 160-260 ℃ in temperature, the reaction time is 15-30min.
8. the described method of any one according to claim 2-5, is characterized in that, the mol ratio of described Schweinfurt green and M-ZSM molecular sieve is 1:1～9.
9. the described method of any one according to claim 2-5, is characterized in that step I i) addition of described organic solvent is the 5-25% of the gross mass of M-ZSM molecular sieve and Schweinfurt green.
10. one kind is utilized the application of catalyst according to claim 1 in removing nitrogen oxides of exhaust gas.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310056989.3A CN103127950B (en) | 2013-02-22 | 2013-02-22 | Preparation method of Cu-ZSM catalyst |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310056989.3A CN103127950B (en) | 2013-02-22 | 2013-02-22 | Preparation method of Cu-ZSM catalyst |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103127950A true CN103127950A (en) | 2013-06-05 |
| CN103127950B CN103127950B (en) | 2014-12-03 |
Family
ID=48488776
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310056989.3A Active CN103127950B (en) | 2013-02-22 | 2013-02-22 | Preparation method of Cu-ZSM catalyst |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103127950B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104437080A (en) * | 2014-12-29 | 2015-03-25 | 湘潭大学 | Denitration method for microwave catalytic decomposition of NO and method of preparing Cu-ZSM-11 |
| CN110252386A (en) * | 2019-07-03 | 2019-09-20 | 福州大学 | A kind of monatomic Ru base ammonia synthetic catalyst and preparation method thereof |
| CN110548537A (en) * | 2019-06-25 | 2019-12-10 | 无锡威孚环保催化剂有限公司 | Preparation method of molecular sieve catalyst for removing nitrogen oxides |
| CN117299195A (en) * | 2023-11-28 | 2023-12-29 | 中汽研汽车检验中心（天津）有限公司 | SCR catalyst with wide temperature window and preparation method and application thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1628904A (en) * | 2003-12-16 | 2005-06-22 | 广东工业大学 | Highly effective catalyst for purifying automobile exhaust and its preparing process |
| CN101516502A (en) * | 2006-08-19 | 2009-08-26 | 乌米科雷股份两合公司 | Catalytically coated diesel particle filter, process for producing it and its use |
| CN102407114A (en) * | 2011-12-30 | 2012-04-11 | 湘潭大学 | Microwave catalyst for copper molecular sieve and microwave catalytic denitration method |
| CN102764586A (en) * | 2012-07-26 | 2012-11-07 | 复旦大学 | Application of CuZSM-11 catalyst in efficient decomposition of N2O |
-
2013
- 2013-02-22 CN CN201310056989.3A patent/CN103127950B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1628904A (en) * | 2003-12-16 | 2005-06-22 | 广东工业大学 | Highly effective catalyst for purifying automobile exhaust and its preparing process |
| CN101516502A (en) * | 2006-08-19 | 2009-08-26 | 乌米科雷股份两合公司 | Catalytically coated diesel particle filter, process for producing it and its use |
| CN102407114A (en) * | 2011-12-30 | 2012-04-11 | 湘潭大学 | Microwave catalyst for copper molecular sieve and microwave catalytic denitration method |
| CN102764586A (en) * | 2012-07-26 | 2012-11-07 | 复旦大学 | Application of CuZSM-11 catalyst in efficient decomposition of N2O |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104437080A (en) * | 2014-12-29 | 2015-03-25 | 湘潭大学 | Denitration method for microwave catalytic decomposition of NO and method of preparing Cu-ZSM-11 |
| CN110548537A (en) * | 2019-06-25 | 2019-12-10 | 无锡威孚环保催化剂有限公司 | Preparation method of molecular sieve catalyst for removing nitrogen oxides |
| CN110252386A (en) * | 2019-07-03 | 2019-09-20 | 福州大学 | A kind of monatomic Ru base ammonia synthetic catalyst and preparation method thereof |
| CN117299195A (en) * | 2023-11-28 | 2023-12-29 | 中汽研汽车检验中心（天津）有限公司 | SCR catalyst with wide temperature window and preparation method and application thereof |
| CN117299195B (en) * | 2023-11-28 | 2024-02-13 | 中汽研汽车检验中心（天津）有限公司 | SCR catalyst with wide temperature window and preparation method and application thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103127950B (en) | 2014-12-03 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Wang et al. | Performance of modified La x Sr1–x MnO3 perovskite catalysts for NH3 oxidation: TPD, DFT, and kinetic studies | |
| Tang et al. | Low temperature catalytic oxidation of nitric oxide over the Mn–CoOx catalyst modified by nonthermal plasma | |
| CN103127950B (en) | Preparation method of Cu-ZSM catalyst | |
| CN102580525A (en) | Method for using activated carbon load copper oxide composite catalyst to absorb nitrogenous oxide | |
| CN103212288B (en) | A kind of method for removing acrylonitrile waste gas | |
| CN104971764A (en) | Low-temperature efficient denitration catalyst and preparation method thereof | |
| CN106111686B (en) | A kind of microwave catalysis restorative procedure of organic matter-heavy-metal composite pollution soil | |
| CN111229208B (en) | Lotus leaf-source biochar-loaded metal oxide low-temperature SCR (selective catalytic reduction) flue gas denitration catalyst and preparation method and application thereof | |
| CN102133547B (en) | Ozone treatment regeneration method and device for vanadium titanium-based flue gas denitration catalyst | |
| CN114392762B (en) | Composite material based on two-dimensional MXene nano structure and preparation method thereof | |
| CN105327698A (en) | Preparation method of novel SCR smoke denitrification catalyst adopting titanium-containing blast furnace slag as carrier | |
| Chen et al. | Low-cost CuX catalyst from blast furnace slag waste for low-temperature NH3-SCR: Nature of Cu active sites and influence of SO2/H2O | |
| CN102949930A (en) | Method for NO oxidation and nitrogen oxide removal at room temperature through synergism of plasma and catalyst | |
| Krishnan et al. | Fabrication and evaluation of CeO2-Fe2O3 mixed oxide for hydrogen evolution by photo water splitting reaction under visible light irradiation | |
| CN111229209A (en) | Lotus leaf source charcoal-loaded manganese oxide low-temperature SCR (selective catalytic reduction) flue gas denitration catalyst and preparation method and application thereof | |
| CN105233860B (en) | A kind of preparation method of catalytic cracking flue gas denitration auxiliary agent | |
| CN102274733B (en) | Catalyst used for catalytically oxidizing NO and preparation method thereof | |
| CN107497478B (en) | Catalyst for removing VOCs (volatile organic compounds) through ultraviolet catalysis and preparation method thereof | |
| CN103394358A (en) | Method for preparing manganese-base low-temperature denitration catalyst by utilizing gold copper tailings | |
| CN109012161B (en) | Air purification material and preparation method thereof | |
| CN109046324B (en) | Medium-low temperature denitration catalyst with mesoporous cerium oxide as carrier and preparation method thereof | |
| CN104707644B (en) | A kind of g C3N4The preparation method of/CuO composites | |
| CN106311256A (en) | Preparation method of graphene/beta-Bi2O3/SrFe12O19 ternary composite magnetic photocatalyst | |
| Sheng et al. | Cerium modified copper-based mordenite zeolite catalyst for high-temperature selective catalytic reduction NO with NH3 of gas turbines | |
| CN109248698B (en) | Low-temperature sulfur-resistant phosphorus-cerium-iron-tin-containing composite denitration 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 | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20170515 Address after: 061000 chemical Avenue South, Cangzhou Lingang Development Zone, Cangzhou, Hebei Patentee after: Hebei Huamao Weiye Technology Co., Ltd. Address before: 414012 Hunan Province, Yueyang city Yunxi District Wen Qiao Zhen Village Bridge Group Patentee before: Yueyang Yitian Chemical Co., Ltd. |
|
| TR01 | Transfer of patent right | ||
| CP03 | Change of name, title or address |
Address after: 061000 South Chemical Avenue, Lingang Development Zone, Cangzhou City, Hebei Province Patentee after: Huamao Weiye Green Technology Co.,Ltd. Address before: 061000 South Chemical Avenue, Cangzhou Lingang Development Zone, Cangzhou City, Hebei Province Patentee before: Hebei Huamao Weiye Technology Co.,Ltd. |
|
| CP03 | Change of name, title or address |