CN113231085A - Ferric sulfate modified red mud-based denitration catalyst and preparation method and application thereof - Google Patents

Ferric sulfate modified red mud-based denitration catalyst and preparation method and application thereof Download PDF

Info

Publication number
CN113231085A
CN113231085A CN202110574864.4A CN202110574864A CN113231085A CN 113231085 A CN113231085 A CN 113231085A CN 202110574864 A CN202110574864 A CN 202110574864A CN 113231085 A CN113231085 A CN 113231085A
Authority
CN
China
Prior art keywords
catalyst
red mud
ferric sulfate
hours
temperature
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
Application number
CN202110574864.4A
Other languages
Chinese (zh)
Other versions
CN113231085B (en
Inventor
刘志明
兰建民
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Beijing University of Chemical Technology
Original Assignee
Beijing University of Chemical Technology
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Beijing University of Chemical Technology filed Critical Beijing University of Chemical Technology
Priority to CN202110574864.4A priority Critical patent/CN113231085B/en
Publication of CN113231085A publication Critical patent/CN113231085A/en
Application granted granted Critical
Publication of CN113231085B publication Critical patent/CN113231085B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J27/00—Catalysts comprising the elements or compounds of halogens, sulfur, selenium, tellurium, phosphorus or nitrogen; Catalysts comprising carbon compounds
    • B01J27/02—Sulfur, selenium or tellurium; Compounds thereof
    • B01J27/053—Sulfates
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/86—Catalytic processes
    • B01D53/8621—Removing nitrogen compounds
    • B01D53/8625—Nitrogen oxides
    • B01D53/8628—Processes characterised by a specific catalyst
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/86—Catalytic processes
    • B01D53/90—Injecting reactants
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/92—Chemical or biological purification of waste gases of engine exhaust gases
    • B01D53/94—Chemical or biological purification of waste gases of engine exhaust gases by catalytic processes
    • B01D53/9404—Removing only nitrogen compounds
    • B01D53/9409—Nitrogen oxides
    • B01D53/9413—Processes characterised by a specific catalyst
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J21/00—Catalysts comprising the elements, oxides, or hydroxides of magnesium, boron, aluminium, carbon, silicon, titanium, zirconium, or hafnium
    • B01J21/02—Boron or aluminium; Oxides or hydroxides thereof
    • B01J21/04—Alumina
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J37/00—Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
    • B01J37/30—Ion-exchange
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2251/00—Reactants
    • B01D2251/20—Reductants
    • B01D2251/206—Ammonium compounds
    • B01D2251/2062—Ammonia
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2257/00—Components to be removed
    • B01D2257/40—Nitrogen compounds
    • B01D2257/404—Nitrogen oxides other than dinitrogen oxide
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2258/00—Sources of waste gases
    • B01D2258/01—Engine exhaust gases
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2258/00—Sources of waste gases
    • B01D2258/02—Other waste gases
    • B01D2258/0283—Flue gases
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2258/00—Sources of waste gases
    • B01D2258/06—Polluted air
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
    • Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Environmental & Geological Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Organic Chemistry (AREA)
  • Biomedical Technology (AREA)
  • Materials Engineering (AREA)
  • Analytical Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Combustion & Propulsion (AREA)
  • Catalysts (AREA)

Abstract

The invention relates to a ferric sulfate modified red mud-based denitration catalyst, and a preparation method and application thereof, and belongs to the technical field of environmental protection and catalysis. The invention adopts solid waste red mud as a main component and is carried out by adding ferric sulfateThe synergistic effect of the modified ferric sulfate and the red mud not only improves the pore structure of the catalyst, but also improves the surface acidity of the catalyst, so that the catalyst has good denitration performance. The invention not only makes the solid waste red mud be recycled, but also greatly reduces the cost of the denitration catalyst and realizes the treatment of waste by waste. The ferric sulfate modified red mud denitration catalyst can be used for NO in fixed source flue gas and diesel vehicle tail gasxThe removal is efficient.

Description

Ferric sulfate modified red mud-based denitration catalyst and preparation method and application thereof
Technical Field
The invention relates to a ferric sulfate modified red mud-based denitration catalyst, and a preparation method and application thereof, wherein the denitration catalyst is suitable for NO in fixed source flue gas and tail gas of a mobile source such as a diesel vehiclexBelonging to the technical field of environmental protection and catalysis.
Background
Nitrogen Oxides (NO)x) As a typical haze-causing pollutant, poses serious hazards to the ecological environment and human health, and therefore, NOxThe control of (2) is of great significance to improve the air quality. NH (NH)3Selective Catalytic Reduction (SCR) technology is used for controlling NOxThe core technology of the effective means of emission is a high-efficiency and stable denitration catalyst. At present, conventional NH3SCR denitration catalyst predominantly V2O5-WO3(MoO3)/TiO2The catalyst has the following problems: active component V2O5Has biological toxicity; and a support of TiO2The phase transition (from anatase to rutile) is easy to occur at high temperature, resulting in a significant decrease in the catalyst activity. Therefore, the development of a novel denitration catalyst has attracted a high degree of attention in academia and industry.
The red mud is used as waste residue in the industrial production of alumina, and with the development of the aluminum industry, the discharge amount of the red mud is increased day by day, which has serious influence on the environment. The invention prepares the pair NH by adding ferric sulfate into the red mud for modification3-a novel red mud based catalyst with good performance for SCR denitration. The red mud is recycled, the production cost of the denitration catalyst is reduced, and the requirement of green development is met.
Disclosure of Invention
The invention aims to provide a method for preparing NH with simple preparation process3A red mud-based catalyst with high activity and good sulfur resistance for SCR denitration and a preparation method thereof. In the ferric sulfate modified red mud-based denitration catalyst, a strong synergistic effect exists between ferric sulfate and red mud, the synergistic effect not only improves the pore structure and the morphology of the catalyst, but also improves the surface acidity of the catalyst, so that the catalyst has excellent denitration activity and strong sulfur resistance. The main component red mud used by the catalyst is cheap and easy to obtain, so that the cost of the catalyst is greatly reduced, and NO is reducedxHas good application prospect in the control field.
The purpose of the invention is realized by the following technical scheme:
the catalyst is a ferric sulfate modified red mud-based catalyst, wherein the mass percent of ferric sulfate is 2-30%, and the balance is red mud.
The invention provides a method for preparing a ferric sulfate modified red mud catalyst, which is characterized by sequentially comprising the following steps of:
(1) preparing 0.05-0.20 mol/L ferric sulfate solution;
(2) adding deionized water into the ferric sulfate solution obtained in the step (1), uniformly stirring, adding red mud into the solution, and stirring for 6-12 hours at the temperature of 20-80 ℃ to prepare mixed slurry;
(3) carrying out suction filtration and washing on the mixed slurry obtained in the step (2), and then drying for 12-24 hours at the temperature of 100-140 ℃;
(4) and (4) roasting the dried sample prepared in the step (3) in a muffle furnace at the temperature of 400-500 ℃ for 4-8 hours to prepare the ferric sulfate modified red mud catalyst.
Compared with the prior art, the invention has the following advantages and prominent effects: without the use of toxic active ingredients V2O5The activity and the sulfur resistance of the catalyst are effectively improved by adding ferric sulfate into the red mud for modification and utilizing the synergistic effect between the ferric sulfate and the red mud. The catalyst of the invention mainly comprises cheap and easily available red mud, the content of alkali/alkaline earth metal ions in the red mud is greatly reduced by ion exchange in the preparation process, the red mud is not required to be pretreated by adding acid and alkali, the preparation process is simple, and the industrial production is convenient to realize.
Drawings
FIG. 1 is SO2For 20% Fe2(SO4)3Influence of/RM catalyst activity;
FIG. 2 is 20% Fe2(SO4)3/RM,Fe2(SO4)3And XRD spectrum of RM;
FIG. 3 is 20% Fe2(SO4)3SEM pictures of/RM and RM.
Detailed Description
The technical scheme of the invention is further explained by combining the following examples (red mud is represented by RM):
example 1: 2% Fe2(SO4)3Preparation of/RM catalysts
a) Adding 5.1ml of 0.05mol/L ferric sulfate solution into deionized water, and uniformly stirring; adding 5g of red mud into the solution, and stirring for 12 hours at the temperature of 20 ℃ to prepare mixed slurry;
b) carrying out suction filtration and washing on the mixed slurry obtained in the step (a), and then drying for 24 hours at the temperature of 100 ℃;
c) placing the dried sample prepared in the step (b) into a muffle furnace to be roasted for 8 hours at the temperature of 400 ℃ to prepare 2% Fe2(SO4)3a/RM catalyst.
Example 2: 5% Fe2(SO4)3Preparation of/RM catalysts
a) Adding deionized water into 11ml of 0.06mol/L ferric sulfate solution, and uniformly stirring; adding 5g of red mud into the solution, and stirring for 6 hours at the temperature of 80 ℃ to prepare mixed slurry;
b) carrying out suction filtration and washing on the mixed slurry obtained in the step (a), and then drying for 12 hours at the temperature of 140 ℃;
c) placing the dried sample prepared in the step (b) into a muffle furnace to be roasted for 4 hours at the temperature of 500 ℃ to prepare 5% Fe2(SO4)3a/RM catalyst.
Example 3: 10% Fe2(SO4)3Preparation of/RM catalysts
a) Taking 13.9ml of 0.10mol/L ferric sulfate solution, adding deionized water, and uniformly stirring; adding 5g of red mud into the solution, and stirring for 12 hours at the temperature of 60 ℃ to prepare mixed slurry;
b) carrying out suction filtration and washing on the mixed slurry obtained in the step (a), and then drying for 12 hours at the temperature of 120 ℃;
c) placing the dried sample prepared in the step (b) into a muffle furnace to be roasted for 6 hours at the temperature of 500 ℃ to prepare 10% Fe2(SO4)3a/RM catalyst.
Example 4: 20% Fe2(SO4)3Preparation of/RM catalysts
a) Taking 15.6ml of 0.20mol/L ferric sulfate solution, adding deionized water, and uniformly stirring; adding 5g of red mud into the solution, and stirring for 12 hours at the temperature of 80 ℃ to prepare mixed slurry;
b) carrying out suction filtration and washing on the mixed slurry obtained in the step (a), and then drying for 12 hours at the temperature of 120 ℃;
c) placing the dried sample prepared in the step (b) into a muffle furnace to be roasted for 6 hours at the temperature of 500 ℃ to prepare 20% Fe2(SO4)3a/RM catalyst.
Example 5: 30% Fe2(SO4)3Preparation of/RM catalysts
a) Taking 26.7ml of 0.20mol/L ferric sulfate solution, adding deionized water, and uniformly stirring; adding 5g of red mud into the solution, and stirring for 6 hours at 50 ℃ to prepare mixed slurry;
b) carrying out suction filtration and washing on the mixed slurry obtained in the step (a), and then drying for 12 hours at the temperature of 120 ℃;
c) placing the dried sample prepared in the step (b) into a muffle furnace to be roasted for 8 hours at the temperature of 500 ℃ to prepare 30% Fe2(SO4)3a/RM catalyst.
Example 6 (reference): 10% Fe2(SO4)3Preparation of/RM (impregnated) catalysts
a) Taking 13.9ml of 0.10mol/L ferric sulfate solution, adding deionized water, and uniformly stirring; adding 5g of red mud into the solution, and uniformly stirring; then drying for 12 hours at the temperature of 120 ℃;
b) placing the dried sample obtained in the step (a) in a muffle furnace to be roasted for 6 hours at the temperature of 500 ℃ to obtain 10% Fe2(SO4)3a/RM (impregnated) catalyst.
Example 7: the catalyst was prepared in the same manner as in example 1 by placing 0.12g of the catalyst in a continuous flow fixed bed reactor with a reaction gas composition of 500ppm NO and 500ppm NH3，5％O2Nitrogen is used as balance gas, the flow rate of reaction gas is 300ml/min, the space velocity is 70000h-1. The activity evaluation temperature range is 300-450 ℃, and the catalyst reduces NO at different temperaturesxThe conversion of (D) is shown in Table 1.
Example 8: the catalyst was prepared in the same manner as in example 2, by placing 0.12g of the catalyst in a continuous flow fixed bed reactor with a reaction gas composition of 500ppm NO and 500ppm NH3，5％O2Nitrogen is used as balance gas, the flow rate of reaction gas is 300ml/min, the space velocity is 70000h-1. The activity evaluation temperature range is 300-450 ℃, and the catalyst reduces NO at different temperaturesxThe conversion of (D) is shown in Table 1.
Example 9: the catalyst was prepared in the same manner as in example 3 by placing 0.12g of the catalyst in a continuous flow fixed bed reactor with a reaction gas composition of 500ppm NO and 500ppm NH3，5％O2Nitrogen is used as balance gas, the flow rate of reaction gas is 300ml/min, the space velocity is 70000h-1. The activity evaluation temperature range is 300-450 ℃, and the catalyst reduces NO at different temperaturesxThe conversion of (D) is shown in Table 1.
Example 10: the catalyst was prepared in the same manner as in example 4 by placing 0.12g of the catalyst in a continuous flow fixed bed reactor with a reaction gas composition of 500ppm NO and 500ppm NH3，5％O2Nitrogen is used as balance gas, the flow rate of reaction gas is 300ml/min, the space velocity is 70000h-1. The activity evaluation temperature range is 300-450 ℃, and the catalyst reduces NO at different temperaturesxThe conversion of (D) is shown in Table 1.
Example 11: the catalyst was prepared in the same manner as in example 5 by placing 0.12g of the catalyst in a continuous flow fixed bed reactor with a reaction gas composition of 500ppm NO and 500ppm NH3，5％O2Nitrogen is used as balance gas, the flow rate of reaction gas is 300ml/min, the space velocity is 70000h-1. The activity evaluation temperature range is 300-450 ℃, and the catalyst reduces NO at different temperaturesxThe conversion of (D) is shown in Table 1.
TABLE 1 evaluation of the Activity of iron sulfate-modified Red mud catalysts
Figure BDA0003082872660000051
Example 12: the catalyst was prepared in the same manner as in example 4 by placing 0.12g of catalyst in a continuous flow fixed bed reactor with a reaction gas composition of 0.05% NO, 0.05% NH3，5％O2，100ppm SO2Nitrogen is used as balance gas, the flow rate of reaction gas is 300ml/min, the space velocity is 70000h-1. The activity evaluation temperature was 350 ℃, and the catalyst reduced NOxThe relationship between the conversion (c) and the reaction time is shown in FIG. 1.

Claims (3)

1. The red mud-based denitration catalyst is characterized by being a ferric sulfate modified red mud catalyst, wherein the mass percent of ferric sulfate is 2-30%, and the balance is red mud.
2. A method for preparing the ferric sulfate-modified red mud catalyst of claim 1, comprising the following steps in sequence:
(1) preparing 0.05-0.20 mol/L ferric sulfate solution;
(2) adding deionized water into the ferric sulfate solution obtained in the step (1), uniformly stirring, adding red mud into the solution, and stirring for 6-12 hours at the temperature of 20-80 ℃ to prepare mixed slurry;
(3) carrying out suction filtration and washing on the mixed slurry obtained in the step (2), and then drying for 12-24 hours at the temperature of 100-140 ℃;
(4) and (4) roasting the dried sample prepared in the step (3) in a muffle furnace at the temperature of 400-500 ℃ for 4-8 hours to prepare the ferric sulfate modified red mud catalyst.
3. The application of the ferric sulfate-modified red mud catalyst of claim 1, wherein the catalyst is used for removing nitrogen oxides from stationary source flue gas and diesel vehicle exhaust.
CN202110574864.4A 2021-05-25 2021-05-25 Ferric sulfate modified red mud-based denitration catalyst and preparation method and application thereof Active CN113231085B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202110574864.4A CN113231085B (en) 2021-05-25 2021-05-25 Ferric sulfate modified red mud-based denitration catalyst and preparation method and application thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202110574864.4A CN113231085B (en) 2021-05-25 2021-05-25 Ferric sulfate modified red mud-based denitration catalyst and preparation method and application thereof

Publications (2)

Publication Number Publication Date
CN113231085A true CN113231085A (en) 2021-08-10
CN113231085B CN113231085B (en) 2023-06-27

Family

ID=77138845

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202110574864.4A Active CN113231085B (en) 2021-05-25 2021-05-25 Ferric sulfate modified red mud-based denitration catalyst and preparation method and application thereof

Country Status (1)

Country Link
CN (1) CN113231085B (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1448550A (en) * 1974-01-31 1976-09-08 Japan Gasoline Process for the removal of nitrogen oxides from a gas stream
CN102008967A (en) * 2010-11-01 2011-04-13 清华大学 Ferric sulfate catalyst and preparation method thereof
CN105536797A (en) * 2016-01-14 2016-05-04 济南大学 Supported type red mud catalyst for flue gas denitrification and preparation method thereof
CN106238064A (en) * 2016-08-22 2016-12-21 山东大学 A kind of ferrum cerium red mud composite oxides denitration catalyst agent material and preparation method thereof

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1448550A (en) * 1974-01-31 1976-09-08 Japan Gasoline Process for the removal of nitrogen oxides from a gas stream
CN102008967A (en) * 2010-11-01 2011-04-13 清华大学 Ferric sulfate catalyst and preparation method thereof
CN105536797A (en) * 2016-01-14 2016-05-04 济南大学 Supported type red mud catalyst for flue gas denitrification and preparation method thereof
CN106238064A (en) * 2016-08-22 2016-12-21 山东大学 A kind of ferrum cerium red mud composite oxides denitration catalyst agent material and preparation method thereof

Also Published As

Publication number Publication date
CN113231085B (en) 2023-06-27

Similar Documents

Publication Publication Date Title
CN105817220B (en) A kind of rare earth modified sulfur resistive low-temperature SCR catalyst and preparation method thereof
CN103464139B (en) A kind of preparation method of structured flue gas denitration catalyst
CN110479247B (en) Red mud-based denitration catalyst and preparation method and application thereof
CN102000562B (en) High-efficiency denitration catalyst and preparation method thereof
CN111167487B (en) Multifunctional catalyst, preparation method and application thereof
CN104338545A (en) Effective SCR (selective catalytic reduction) catalyst applied to purification of nitrogen oxide in tail gas of diesel engine
CN103769083A (en) Efficient denitration composite oxide catalyst as well as preparation method and application thereof
CN106492790A (en) A kind of low temperature SCR denitration catalyst and preparation method thereof
CN110947416B (en) For NH 3 Iron/molecular sieve catalyst of SCR (selective catalytic reduction), and preparation method and application thereof
CN105903478B (en) Medium-low temperature SCR catalyst with wider use temperature and preparation method thereof
CN106807401A (en) A kind of renovation process of denitrating catalyst and a kind of regeneration denitrating catalyst and its application
CN102962074B (en) Denitration catalyst of wide activity temperature window as well as preparation method and application thereof
CN113318728A (en) Three-dimensional ordered macroporous tungsten-cerium-zirconium composite oxide catalyst and preparation method and application thereof
CN105879869A (en) Catalyst used for hydrogen selective reduction of nitric oxide as well as preparation method and application thereof
CN113231085B (en) Ferric sulfate modified red mud-based denitration catalyst and preparation method and application thereof
CN111389419B (en) Cerium dioxide loaded ferric sulfate catalyst and preparation method and application thereof
CN105126813A (en) High-specific-surface denitration catalyst and preparation and application thereof
CN111437875A (en) Cerium-iron molecular sieve based catalyst with wide temperature range and preparation method thereof
CN103447072B (en) Preparation method of Fe-NaY-C-attapulgite compound flue gas denitrification catalyst
CN108404966B (en) Coke oven flue gas low-temperature denitration catalyst and preparation method thereof
CN111013636A (en) Preparation method of low-temperature denitration catalyst based on municipal sludge
CN114471532A (en) Preparation method and application of flower-like samarium-manganese composite oxide denitration catalyst
CN108855044B (en) Preparation method of vanadium-tungsten catalyst
CN111346495B (en) Preparation method of metakaolin-based flue gas denitration agent
CN114682246B (en) Titanium modified cerium vanadate catalyst and 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
GR01 Patent grant
GR01 Patent grant