CN115869936A - Preparation method of wide-temperature cerium-based denitration catalyst and catalyst prepared by using same - Google Patents
Preparation method of wide-temperature cerium-based denitration catalyst and catalyst prepared by using same Download PDFInfo
- Publication number
- CN115869936A CN115869936A CN202211459269.7A CN202211459269A CN115869936A CN 115869936 A CN115869936 A CN 115869936A CN 202211459269 A CN202211459269 A CN 202211459269A CN 115869936 A CN115869936 A CN 115869936A
- Authority
- CN
- China
- Prior art keywords
- cerium
- temperature
- catalyst
- denitration catalyst
- wide
- 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
- 239000003054 catalyst Substances 0.000 title claims abstract description 86
- 229910052684 Cerium Inorganic materials 0.000 title claims abstract description 36
- GWXLDORMOJMVQZ-UHFFFAOYSA-N cerium Chemical compound [Ce] GWXLDORMOJMVQZ-UHFFFAOYSA-N 0.000 title claims abstract description 36
- 238000002360 preparation method Methods 0.000 title claims abstract description 23
- 239000002243 precursor Substances 0.000 claims abstract description 37
- 238000001354 calcination Methods 0.000 claims abstract description 27
- 238000011068 loading method Methods 0.000 claims abstract description 22
- 239000000843 powder Substances 0.000 claims abstract description 10
- 238000000034 method Methods 0.000 claims abstract description 9
- MUBZPKHOEPUJKR-UHFFFAOYSA-N oxalic acid group Chemical group C(C(=O)O)(=O)O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 claims description 45
- 229910010413 TiO 2 Inorganic materials 0.000 claims description 15
- 235000006408 oxalic acid Nutrition 0.000 claims description 15
- 239000007787 solid Substances 0.000 claims description 14
- 239000012298 atmosphere Substances 0.000 claims description 11
- 238000001035 drying Methods 0.000 claims description 11
- 239000002245 particle Substances 0.000 claims description 11
- 238000002156 mixing Methods 0.000 claims description 10
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 claims description 9
- 239000008367 deionised water Substances 0.000 claims description 7
- 229910021641 deionized water Inorganic materials 0.000 claims description 7
- 238000003756 stirring Methods 0.000 claims description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 7
- 239000006184 cosolvent Substances 0.000 claims description 6
- 229960001759 cerium oxalate Drugs 0.000 claims description 5
- ZMZNLKYXLARXFY-UHFFFAOYSA-H cerium(3+);oxalate Chemical compound [Ce+3].[Ce+3].[O-]C(=O)C([O-])=O.[O-]C(=O)C([O-])=O.[O-]C(=O)C([O-])=O ZMZNLKYXLARXFY-UHFFFAOYSA-H 0.000 claims description 5
- QQZMWMKOWKGPQY-UHFFFAOYSA-N cerium(3+);trinitrate;hexahydrate Chemical compound O.O.O.O.O.O.[Ce+3].[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O QQZMWMKOWKGPQY-UHFFFAOYSA-N 0.000 claims description 5
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 4
- 239000012300 argon atmosphere Substances 0.000 claims description 4
- VYLVYHXQOHJDJL-UHFFFAOYSA-K cerium trichloride Chemical compound Cl[Ce](Cl)Cl VYLVYHXQOHJDJL-UHFFFAOYSA-K 0.000 claims description 4
- 238000000227 grinding Methods 0.000 claims description 4
- 239000001257 hydrogen Substances 0.000 claims description 4
- 229910052739 hydrogen Inorganic materials 0.000 claims description 4
- QGAVSDVURUSLQK-UHFFFAOYSA-N ammonium heptamolybdate Chemical compound N.N.N.N.N.N.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.[Mo].[Mo].[Mo].[Mo].[Mo].[Mo].[Mo] QGAVSDVURUSLQK-UHFFFAOYSA-N 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 9
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 abstract description 5
- 239000003546 flue gas Substances 0.000 abstract description 5
- 238000006243 chemical reaction Methods 0.000 abstract description 3
- 238000005245 sintering Methods 0.000 abstract description 3
- 238000001179 sorption measurement Methods 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 15
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 9
- 239000000463 material Substances 0.000 description 5
- 239000000203 mixture Substances 0.000 description 5
- 239000010453 quartz Substances 0.000 description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 5
- 238000005303 weighing Methods 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 3
- NWJUARNXABNMDW-UHFFFAOYSA-N tungsten vanadium Chemical compound [W]=[V] NWJUARNXABNMDW-UHFFFAOYSA-N 0.000 description 3
- 238000003915 air pollution Methods 0.000 description 2
- 239000012159 carrier gas Substances 0.000 description 2
- GNTDGMZSJNCJKK-UHFFFAOYSA-N divanadium pentaoxide Chemical compound O=[V](=O)O[V](=O)=O GNTDGMZSJNCJKK-UHFFFAOYSA-N 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 229910052720 vanadium Inorganic materials 0.000 description 2
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 description 2
- 238000003916 acid precipitation Methods 0.000 description 1
- CETPSERCERDGAM-UHFFFAOYSA-N ceric oxide Chemical compound O=[Ce]=O CETPSERCERDGAM-UHFFFAOYSA-N 0.000 description 1
- 229910000422 cerium(IV) oxide Inorganic materials 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 229910052761 rare earth metal Inorganic materials 0.000 description 1
- 150000002910 rare earth metals Chemical class 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
Images
Abstract
The invention discloses a preparation method of a wide-temperature cerium-based denitration catalyst and a catalyst prepared by using the same, and relates to the field of process flue gas pollution treatment. The preparation method comprises the following steps: (1) BaTiO 2 (3‑x) Preparing an Hx carrier; (2) preparing a mixed precursor solution; (3) loading components; and (4) calcining the catalyst. Has the beneficial effects that: the invention selects BaTiO with excellent NOx adsorption performance 3 The object is H-ion doping is introduced by a thermal sintering reaction mode to prepare black BaTiO (3‑x) Hx powder and BaTiO (3‑x) Hx is used as a carrier, so that the low-temperature activity of the Ce-based catalyst is improved, and the wide-temperature Ce-based denitration catalyst is prepared. In the present invention, the method adoptsThe Ce-based catalyst prepared by the method is applied to CeO 2 The denitration efficiency can reach more than 80% at 160 ℃ under the condition of 10-15% of loading amount, and the denitration efficiency can reach 100% at 180 ℃.
Description
Technical Field
The invention relates to the field of process flue gas pollution treatment, in particular to a preparation method of a wide-temperature cerium-based denitration catalyst and the catalyst prepared by the same.
Background
Nitrogen oxides (NOx) are one of the causes of pollution phenomena such as haze and acid rain, and are important targets for air pollution control. With the implementation of "action plan for preventing and controlling air pollution" and the implementation of strategic plans such as the blue sky guard war, the industrial flue gas emission standard becomes more and more strict. The denitration technology most used for industrial flue gas treatment is an SCR technology, and the core of the denitration technology is a denitration catalyst. The catalysts currently in commercial use are mainly vanadium-based catalysts and cerium-based catalysts. Although the vanadium-based catalyst is mainly applied at present, the cerium-based catalyst has better application prospect in the future because vanadium pentoxide has toxicity and cerium dioxide is non-toxic and environment-friendly.
However, the conventional Ce-based denitration catalyst has the problems that the Ce-based denitration catalyst is short in plate application and poor in activity at low temperature, for example, chinese patent application publication No. CN111841526A discloses modified Ce-Ti medium-low temperature flue gas denitration catalyst powder and a preparation method thereof, and the Ce-Ti catalyst prepared by the patent has the denitration efficiency of more than 90% at the temperature of more than 250 ℃ under the condition that the rare earth content is up to 8-15%, and also has the problem of poor activity at low temperature.
Disclosure of Invention
The technical problem to be solved by the invention is how to solve the problem that the activity of the existing cerium-based catalyst is poor at low temperature.
The invention solves the technical problems through the following technical means:
a preparation method of a wide-temperature cerium-based denitration catalyst comprises the following steps:
(1)BaTiO (3-x) H x preparing a carrier: mixing BaH 2 With TiO 2 Mixing according to a certain molar ratio, grinding under argon atmosphere, calcining, switching hydrogen atmosphere, and calcining to obtain black BaTiO (3-x) H x A carrier A;
(2) Preparing a mixed precursor solution: adding a catalyst active component precursor, a cocatalyst precursor and a cosolvent into deionized water to obtain a mixed precursor solution B;
(3) Component loading: adding the precursor solution B obtained in the step (2) into the carrier A obtained in the step (1), uniformly stirring, and drying to obtain a solid C;
(4) And (3) calcining the catalyst: and (4) calcining the solid C obtained in the step (3) in an air atmosphere to obtain the wide-temperature cerium-based denitration catalyst.
Has the advantages that: the invention selects BaTiO with excellent NOx adsorption performance 3 As an object, H-ion doping is introduced in a thermal sintering reaction mode to prepare black BaTiO (3-x) Hx powder, and the BaTiO (3-x) Hx is used as a carrier to carry out component loading and calcination with a specific mixed precursor solution to prepare the wide-temperature Ce-based denitration catalyst, so that the low-temperature activity of the Ce-based catalyst is improved.
Preferably, baH in said step (1) 2 With TiO 2 The particle size of the powder is less than 2000 meshes.
Preferably, baH in the step (1) 2 With TiO 2 1.
Preferably, the grinding time in the step (1) is 0.5-1h.
Preferably, the calcining temperature in the argon atmosphere in the step (1) is 500-600 ℃, and the time is 4-6h.
Preferably, the calcination temperature in the hydrogen atmosphere in the step (1) is 600 ℃, and the duration is 4-6h.
Preferably, the precursor of the catalyst active component in the step (2) is one of cerium nitrate hexahydrate, cerium chloride and cerium oxalate.
Preferably, in the step (2), the promoter precursor is one of ammonium metatungstate and ammonium heptamolybdate.
Preferably, the cosolvent in the step (2) is oxalic acid.
Preferably, the catalyst active component precursor (as CeO) in the step (2) 2 Calculated by taking the carrier as a reference) is 10-15wt%, and the precursor of the cocatalyst is calculated by WO 3 Or MoO 3 Calculated by the carrier) is 5-8wt percent,
preferably, the mass ratio of the cosolvent to the cocatalyst in the step (2) is 2:1.
preferably, the drying temperature in the step (3) is 60-80 ℃, and the drying time is 12h.
Preferably, the roasting temperature in the step (4) is 450 ℃, and the roasting time is 2-4h.
The invention also provides the wide-temperature cerium-based denitration catalyst prepared by the method.
The invention has the advantages that:
(1) The invention selects BaTiO with excellent NOx adsorption performance 3 For the purpose, H is introduced by means of a thermal sintering reaction — Ion doping to obtain black BaTiO (3-x) H x Powder of BaTiO (3-x) H x The Ce-based denitration catalyst is used as a carrier, and is subjected to component loading and calcination with a specific mixed precursor solution to prepare the wide-temperature Ce-based denitration catalyst, so that the low-temperature activity of the Ce-based catalyst is improved.
(2) The Ce-based catalyst prepared by the method of the invention is applied to CeO 2 The denitration efficiency of more than 80% can be achieved at 160 ℃ under the condition of 10-15% of loading amount, the denitration efficiency of 100% can be achieved at 180 ℃, and the low-temperature activity of the Ce-based catalyst is improved.
Drawings
FIG. 1 is a graph comparing the results of the activity measurement of catalysts in examples 1 to 4 of the present invention and comparative example 1.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1:
a preparation method of a wide-temperature cerium-based denitration catalyst comprises the following steps:
(1)BaTiO (3-x) H x support preparation (based on 10 g): mixing BaH 2 With TiO 2 After mixing according to the molar ratio of 1 (3-x) H x A carrier A; wherein BaH 2 With TiO 2 The particle size of the powder is less than 2000 meshes;
(2) Preparing a mixed precursor solution: according to CeO 2 The loading (based on the carrier) was 10wt%, WO 3 The loading (based on the carrier) is 5wt%, oxalic acid and WO 3 Weighing a proper amount of cerium oxalate, ammonium metatungstate and oxalic acid and adding the weighed materials into 10mL of deionized water according to a mass ratio of 2;
(3) Loading components: adding the precursor solution B obtained in the step (2) into the carrier A obtained in the step (1), uniformly stirring, and drying at 60 ℃ for 12h to obtain a solid C;
(4) And (3) calcining the catalyst: and (4) calcining the solid C obtained in the step (3) for 2 hours at 450 ℃ in an air atmosphere to obtain the wide-temperature cerium-based denitration catalyst.
The wide-temperature cerium-based denitration catalyst (with the particle size of 200-100 meshes) prepared in the embodiment is placed in a quartz tube and fixed in a fixed bed, and simulated gas is introduced to heat up to test the performance of the catalyst. The simulated gas composition was: NO (1000 ppm), NH 3 (1000ppm)、O 2 (6vol.％)、N 2 The total gas flow is 1L/min, the catalyst dosage is 0.3g, the test temperature is 140-450 ℃, and the test result is shown in figure 1.
Example 2:
a preparation method of a wide-temperature cerium-based denitration catalyst comprises the following steps:
(1)BaTiO (3-x) H x support preparation (based on 10 g): mixing BaH 2 With TiO 2 After mixing according to a molar ratio of 1 (3-x) H x A carrier A; wherein BaH 2 With TiO 2 The particle size of the powder is less than 2000 meshes;
(2) Preparing a mixed precursor solution: according to CeO 2 The loading (based on the carrier) is 15wt%, moO 3 The loading capacity (based on the carrier) is 8 percent, and oxalic acid and MoO 3 Weighing a proper amount of cerous nitrate hexahydrate, ammonium heptamolybdate and oxalic acid and adding the weighed materials into 10mL of deionized water to obtain a mixed precursor solution B, wherein the mass ratio of the raw materials to the mixed precursor solution B is 2;
(3) Loading components: adding the precursor solution B obtained in the step (2) into the carrier A obtained in the step (1), uniformly stirring, and drying at 80 ℃ for 12h to obtain a solid C;
(4) And (3) calcining the catalyst: and (4) calcining the solid C obtained in the step (3) for 4 hours at 450 ℃ in an air atmosphere to obtain the wide-temperature cerium-based denitration catalyst.
The wide-temperature cerium-based denitration catalyst (with the particle size of 200-100 meshes) prepared in the embodiment is placed in a quartz tube and fixed in a fixed bed, and simulated gas is introduced to heat up and test the performance of the catalyst. The composition of the simulated gas was: NO (1000 ppm), NH 3 (1000ppm)、O 2 (6vol.％)、N 2 The total gas flow is 1L/min as carrier gas, the catalyst dosage is 0.3g, the test temperature is 140-450 ℃, and the test result is shown in figure 1.
Example 3:
a preparation method of a wide-temperature cerium-based denitration catalyst comprises the following steps:
(1)BaTiO (3-x) hx vectorPreparation (based on 10 g): mixing BaH 2 With TiO 2 After mixing according to the molar ratio of 1 (3-x) H x A carrier A; wherein BaH 2 With TiO 2 The particle size of the powder is less than 2000 meshes;
(2) Preparing a mixed precursor solution: according to CeO 2 The loading (based on the carrier) is 12 percent, WO 3 The loading (based on the carrier) is 8 percent, and oxalic acid and WO are added 3 Weighing a proper amount of cerium chloride, ammonium metatungstate and oxalic acid and adding the weighed materials into 10mL of deionized water to obtain a mixed precursor solution B, wherein the mass ratio of the cerium chloride to the ammonium metatungstate to the oxalic acid is 2;
(3) Component loading: adding the precursor solution B obtained in the step (2) into the carrier A obtained in the step (1), uniformly stirring, and drying at 70 ℃ for 12h to obtain a solid C;
(4) And (3) calcining the catalyst: and (4) calcining the solid C obtained in the step (3) for 3 hours at 450 ℃ in an air atmosphere to obtain the wide-temperature cerium-based denitration catalyst.
The wide-temperature cerium-based denitration catalyst (with the particle size of 200-100 meshes) prepared in the embodiment is placed in a quartz tube and fixed in a fixed bed, and simulated gas is introduced to heat up to test the performance of the catalyst. The composition of the simulated gas was: NO (1000 ppm), NH 3 (1000ppm)、O 2 (6vol.％)、N 2 The total gas flow is 1L/min as carrier gas, the catalyst dosage is 0.3g, the test temperature is 140-450 ℃, and the test result is shown in figure 1.
Example 4:
a preparation method of a wide-temperature cerium-based denitration catalyst comprises the following steps:
(1)BaTiO (3-x) H x support preparation (based on 10 g): baH is mixed with 2 With TiO 2 After mixing according to a molar ratio of 1 (3-x) H x A carrier A; wherein BaH 2 With TiO 2 Powder bodyThe particle size of the (D) is less than 2000 meshes;
(2) Preparing a mixed precursor solution: according to CeO 2 The loading (based on the carrier) was 15%, WO 3 The loading (based on the carrier) is 6 percent, and oxalic acid and WO are added 3 Weighing a proper amount of cerous nitrate hexahydrate, ammonium metatungstate and oxalic acid and adding the weighed materials into 10mL of deionized water to obtain a mixed precursor solution B, wherein the mass ratio of the cerous nitrate hexahydrate, the ammonium metatungstate and the oxalic acid is 2;
(3) Component loading: adding the precursor solution B obtained in the step (2) into the carrier A obtained in the step (1), uniformly stirring, and drying at 60 ℃ for 12 hours to obtain a solid C;
(4) And (3) calcining the catalyst: and (4) calcining the solid C obtained in the step (3) for 2 hours at 450 ℃ in an air atmosphere to obtain the wide-temperature cerium-based denitration catalyst.
The wide-temperature cerium-based denitration catalyst (with the particle size of 200-100 meshes) prepared in the embodiment is placed in a quartz tube and fixed in a fixed bed, and simulated gas is introduced to heat up to test the performance of the catalyst. The composition of the simulated gas was: NO (1000 ppm), NH 3 (1000ppm)、O 2 (6vol.％)、N 2 The total gas flow is 1L/min, the catalyst dosage is 0.3g, the test temperature is 140-450 ℃, and the test result is shown in figure 1.
Comparative example 1:
a preparation method of a cerium-based denitration catalyst comprises the following steps:
(1) Preparing a mixed precursor solution: according to CeO 2 The loading amount is 15 percent and WO 3 The loading capacity is 8 percent, and oxalic acid and WO are 3 Weighing a proper amount of cerium oxalate, ammonium metatungstate and oxalic acid, and adding the weighed materials into 10mL of deionized water to obtain a mixed precursor solution B, wherein the mass ratio of the cerium oxalate to the ammonium metatungstate to the oxalic acid is 2;
(2) Loading components: adding the precursor solution B obtained in the step (1) into 10g of commercially available BaTiO 3 Uniformly stirring the carrier A, and drying the carrier A for 12 hours at 60 ℃ to obtain solid C;
(3) And (3) calcining the catalyst: and (3) calcining the solid C obtained in the step (2) for 2 hours at 450 ℃ in an air atmosphere to obtain the cerium-based denitration catalyst.
The cerium-based denitration catalyst (particle size 200-100 mesh) prepared in the comparative example was placed in a quartz tube and fixed bedFixing, introducing simulation gas, and heating to test the performance of the catalyst. The composition of the simulated gas was: NO (1000 ppm), NH 3 (1000ppm)、O 2 (6vol.％)、N 2 The total gas flow is 1L/min, the catalyst dosage is 0.3g, the test temperature is 140-450 ℃, and the test result is shown in figure 1.
As can be seen from FIG. 1, the strain of BaH 2 With TiO 2 BaTiO prepared by modulating preparation conditions as raw materials (3-x) H x Compared with the commercially available BaTiO, the supported vanadium-tungsten denitration catalyst of the carrier 3 Compared with the vanadium-tungsten denitration catalyst which is a carrier, the vanadium-tungsten denitration catalyst shows lower-temperature denitration activity and wider denitration temperature window range.
The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. A preparation method of a wide-temperature cerium-based denitration catalyst is characterized by comprising the following steps:
(1)BaTiO (3-x) H x preparing a carrier: baH is mixed with 2 With TiO 2 Mixing according to a certain molar ratio, grinding under argon atmosphere, calcining, switching hydrogen atmosphere, and calcining to obtain black BaTiO (3-x) H x A carrier A;
(2) Preparing a mixed precursor solution: adding a catalyst active component precursor, a cocatalyst precursor and a cosolvent into deionized water to obtain a mixed precursor solution B;
(3) Loading components: adding the precursor solution B obtained in the step (2) into the carrier A obtained in the step (1), uniformly stirring, and drying to obtain a solid C;
(4) And (3) calcining the catalyst: and (4) calcining the solid C obtained in the step (3) in an air atmosphere to obtain the wide-temperature cerium-based denitration catalyst.
2. The method of preparing a wide temperature cerium-based denitration catalyst according to claim 1, wherein the BaH in the step (1) 2 With TiO 2 The particle size of the powder is less than 2000 meshes; the BaH 2 With TiO 2 1 is 1.
3. The preparation method of the wide temperature cerium-based denitration catalyst according to claim 1 or 2, wherein the grinding time in the step (1) is 0.5 to 1 hour.
4. The preparation method of the wide temperature cerium-based denitration catalyst according to claim 3, wherein the calcination temperature in an argon atmosphere in step (1) is 500 to 600 ℃ for 4 to 6 hours, and the calcination temperature in a hydrogen atmosphere is 600 ℃ for 4 to 6 hours.
5. The preparation method of the wide temperature cerium-based denitration catalyst according to claim 1, wherein in the step (2), the catalyst active component precursor is one of cerium nitrate hexahydrate, cerium chloride and cerium oxalate, the promoter precursor is one of ammonium metatungstate and ammonium heptamolybdate, and the cosolvent is oxalic acid.
6. The method for preparing a wide temperature cerium-based denitration catalyst as claimed in claim 1, wherein the catalyst active component precursor (as CeO) in the step (2) 2 Calculated by taking the carrier as a reference) is 10-15wt%, and the precursor of the cocatalyst is calculated by WO 3 Or MoO 3 Based on the carrier) in an amount of 5 to 8wt%.
7. The preparation method of the wide-temperature cerium-based denitration catalyst as claimed in claim 1, wherein the mass ratio of the co-solvent to the promoter precursor in the step (2) is 2:1.
8. the preparation method of the wide temperature cerium-based denitration catalyst according to claim 1, wherein the drying temperature in the step (3) is 60-80 ℃ and the drying time is 12 hours.
9. The method for preparing a wide temperature cerium-based denitration catalyst according to claim 1, wherein the calcination temperature in the step (4) is 450 ℃ and the calcination time is 2-4 hours.
10. A broad temperature cerium-based denitration catalyst prepared by the preparation method as set forth in any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211459269.7A CN115869936A (en) | 2022-11-17 | 2022-11-17 | Preparation method of wide-temperature cerium-based denitration catalyst and catalyst prepared by using same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211459269.7A CN115869936A (en) | 2022-11-17 | 2022-11-17 | Preparation method of wide-temperature cerium-based denitration catalyst and catalyst prepared by using same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115869936A true CN115869936A (en) | 2023-03-31 |
Family
ID=85760418
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211459269.7A Pending CN115869936A (en) | 2022-11-17 | 2022-11-17 | Preparation method of wide-temperature cerium-based denitration catalyst and catalyst prepared by using same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115869936A (en) |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56152743A (en) * | 1980-04-25 | 1981-11-26 | Kobe Steel Ltd | Catalyst composition for high-temperature waste gas denitration |
| CN101829561A (en) * | 2010-05-18 | 2010-09-15 | 清华大学 | Catalyst for oxidizing flue gas elementary mercury of coal-fired power plant and preparation method thereof |
| JP2011005462A (en) * | 2009-06-29 | 2011-01-13 | Toyota Central R&D Labs Inc | Nitrogen oxide removing catalyst |
| CN102101049A (en) * | 2011-01-25 | 2011-06-22 | 清华大学 | Intermediate temperature sulfur-resistant type composite oxide catalyst as well as preparation thereof and application thereof |
| US20130202513A1 (en) * | 2010-12-01 | 2013-08-08 | Research Center For Eco-Environmental Sciences Chinese Academy of Sciences | Ce-BASED COMPOSITE OXIDE CATALYST, PREPARATION METHOD AND APPLICATION THEREOF |
| CN104383912A (en) * | 2014-11-11 | 2015-03-04 | 中国石油大学(华东) | Flue gas denitrification catalyst and preparation method thereof |
| CN109465007A (en) * | 2018-11-20 | 2019-03-15 | 东北大学 | A kind of preparation method of ceria-based denitration catalyst |
| CN109529812A (en) * | 2018-12-05 | 2019-03-29 | 北京工业大学 | A kind of SCR catalyst and preparation method suitable for high temperature high-humidity gas fume condition |
| JP2019077583A (en) * | 2017-10-24 | 2019-05-23 | 国立研究開発法人科学技術振興機構 | Method for producing ammonia |
| CN113993818A (en) * | 2019-07-08 | 2022-01-28 | 国立研究开发法人科学技术振兴机构 | Method for producing metal oxyhydroxide, and ammonia synthesis method using same |
| CN114308008A (en) * | 2021-11-24 | 2022-04-12 | 安徽元琛环保科技股份有限公司 | Porous reduced TiO based on Ba doping2Preparation method of ultralow-temperature denitration catalyst |
-
2022
- 2022-11-17 CN CN202211459269.7A patent/CN115869936A/en active Pending
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56152743A (en) * | 1980-04-25 | 1981-11-26 | Kobe Steel Ltd | Catalyst composition for high-temperature waste gas denitration |
| JP2011005462A (en) * | 2009-06-29 | 2011-01-13 | Toyota Central R&D Labs Inc | Nitrogen oxide removing catalyst |
| CN101829561A (en) * | 2010-05-18 | 2010-09-15 | 清华大学 | Catalyst for oxidizing flue gas elementary mercury of coal-fired power plant and preparation method thereof |
| US20130202513A1 (en) * | 2010-12-01 | 2013-08-08 | Research Center For Eco-Environmental Sciences Chinese Academy of Sciences | Ce-BASED COMPOSITE OXIDE CATALYST, PREPARATION METHOD AND APPLICATION THEREOF |
| CN102101049A (en) * | 2011-01-25 | 2011-06-22 | 清华大学 | Intermediate temperature sulfur-resistant type composite oxide catalyst as well as preparation thereof and application thereof |
| CN104383912A (en) * | 2014-11-11 | 2015-03-04 | 中国石油大学(华东) | Flue gas denitrification catalyst and preparation method thereof |
| JP2019077583A (en) * | 2017-10-24 | 2019-05-23 | 国立研究開発法人科学技術振興機構 | Method for producing ammonia |
| CN109465007A (en) * | 2018-11-20 | 2019-03-15 | 东北大学 | A kind of preparation method of ceria-based denitration catalyst |
| CN109529812A (en) * | 2018-12-05 | 2019-03-29 | 北京工业大学 | A kind of SCR catalyst and preparation method suitable for high temperature high-humidity gas fume condition |
| CN113993818A (en) * | 2019-07-08 | 2022-01-28 | 国立研究开发法人科学技术振兴机构 | Method for producing metal oxyhydroxide, and ammonia synthesis method using same |
| US20220241754A1 (en) * | 2019-07-08 | 2022-08-04 | Japan Science And Technology Agency | Method of producing metal oxyhydride, metal oxyhydride, and method of synthesizing ammonia using same |
| CN114308008A (en) * | 2021-11-24 | 2022-04-12 | 安徽元琛环保科技股份有限公司 | Porous reduced TiO based on Ba doping2Preparation method of ultralow-temperature denitration catalyst |
Non-Patent Citations (6)
| Title |
|---|
| MASAYOSHI MIYAZAKI ET AL: "Hexagonal BaTiO(3–x)Hx Oxyhydride as a Water-Durable Catalyst Support for Chemoselective Hydrogenation", J. AM. CHEM. SOC., vol. 144, 5 April 2022 (2022-04-05) * |
| REJI NEDUMKANDATHIL ET AL: "Hydride Reduction of BaTiO3 − Oxyhydride Versus O Vacancy Formation", ACS OMEGA, vol. 3, 19 September 2018 (2018-09-19) * |
| YANCHEN YOU ET AL: "The poisoning effects of phosphorus on CeO2-MoO3/TiO2 DeNOx catalysts: NH3-SCR activity and the formation of N2O", MOLECULAR CATALYSIS, vol. 439, 21 June 2017 (2017-06-21) * |
| 唐仲恺等: "CeO2-WO3/TiO2同时催化脱除氮氧化物与氯苯研究", 热力发电, vol. 51, 28 February 2022 (2022-02-28) * |
| 李娜等: "基于氧化铈的低温NH3-SCR催化剂的研究进展", 材料导报, vol. 36, 28 April 2022 (2022-04-28) * |
| 董长青等: "CeO2-MoO3/TiO2型无钒脱硝催化剂性能研究", 热力发电, vol. 45, 31 July 2016 (2016-07-31) * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US11673128B2 (en) | Method for preparing molecular sieve SCR catalyst, and catalyst prepared therethrough | |
| CN102553574B (en) | Method for preparing flue gas SCR (Selective Catalytic Reduction) denitration catalyst | |
| CN109745966B (en) | Environment-friendly catalyst for SCR denitration and preparation method thereof | |
| CN103638942A (en) | SCR (selective catalytic reduction) catalyst for denitrating low-temperature smoke of cement kiln and preparation method thereof | |
| CN111408365A (en) | Preparation method of monolithic manganese-based catalyst for low-temperature denitration | |
| CN107899567A (en) | A kind of mesoporous Zr, Ce codope SCR catalyst | |
| CN102716753A (en) | Catalyst for low-temperature selective catalytic reduction of nitric oxide and preparation method of catalyst | |
| CN102861565A (en) | Aluminum oxide-loaded cerium oxide catalyst and preparation method and application thereof | |
| CN105413715A (en) | Composite support loaded type sulfated Mn-Co-Ce sulfur-tolerant catalyst for low-temperature flue gas denitration and preparation method of sulfur-tolerant catalyst | |
| CN106732536B (en) | A kind of CeO2@MnOx low-temperature SCR catalyst for denitrating flue gas and the preparation method and application thereof | |
| CN111644179A (en) | Honeycomb ceramic load rare earth doped copper-manganese oxide catalyst for catalytic combustion of organic waste gas and preparation method thereof | |
| CN107185523B (en) | Preparation method of holmium modified denitration catalyst and product thereof | |
| CN106311276B (en) | A kind of denitrating catalyst and preparation method thereof | |
| CN113083286B (en) | Preparation method of ultra-high temperature denitration catalyst | |
| CN103447066B (en) | Preparation method of supported composite oxide catalyst for catalytic combustion | |
| CN111530448A (en) | High-sulfur-resistance nonmetal-doped metal oxide denitration catalyst and preparation method thereof | |
| CN109745995B (en) | Wide-temperature-window SCR flue gas denitration catalyst and preparation method and application thereof | |
| CN110479245A (en) | A kind of molybdenum cerium support type catalyst for denitrating flue gas and its preparation method and application | |
| CN106362763A (en) | Synthetic method for Mn-NiOx catalytic material used for SCR denitration | |
| CN113877611A (en) | Phosphoric acid modified manganese oxide supported catalyst and preparation method thereof | |
| CN109046324B (en) | Medium-low temperature denitration catalyst with mesoporous cerium oxide as carrier and preparation method thereof | |
| CN115869936A (en) | Preparation method of wide-temperature cerium-based denitration catalyst and catalyst prepared by using same | |
| CN110918082A (en) | Bimetallic oxide catalyst and preparation method and application thereof | |
| CN115672310A (en) | Low-temperature SCR denitration catalyst with sulfur poisoning resistance and preparation method thereof | |
| CN113019411B (en) | Boron nitride supported platinum-based catalyst for low-temperature selective catalytic oxidation of ammonia, preparation method and application thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |