CN101829561A - Catalyst for oxidizing flue gas elementary mercury of coal-fired power plant and preparation method thereof - Google Patents
Catalyst for oxidizing flue gas elementary mercury of coal-fired power plant and preparation method thereof Download PDFInfo
- Publication number
- CN101829561A CN101829561A CN 201010176293 CN201010176293A CN101829561A CN 101829561 A CN101829561 A CN 101829561A CN 201010176293 CN201010176293 CN 201010176293 CN 201010176293 A CN201010176293 A CN 201010176293A CN 101829561 A CN101829561 A CN 101829561A
- Authority
- CN
- China
- Prior art keywords
- quality
- catalyst
- active component
- oxalic acid
- acid solution
- 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
Landscapes
- Catalysts (AREA)
Abstract
The invention relates to a catalyst for oxidizing flue gas elementary mercury of a coal-fired power plant, adopting anatase titanium dioxide as a carrier, cerium oxide as a main active component and tungstic oxide as a secondary active component for exerting synergistic effect and is expressed as CeO-WO3/TiO2, wherein the main active component CeO2 is added in a cerium nitrate mode, and the secondary active component WO3 is added in an ammonium paratungstate mode. The preparation method comprises the following steps of: adding ammonium paratungstate powder into an oxalic acid solution to form a transparent solution; adding cerium nitrate powder into the transparent solution to form flocculent precipitates; then, ultrasonically immersing the solution with the flocculent precipitates; adding titanium dioxide powder into the solution; adding deionized water to obtain white slurry; finally, ultrasonically immersing the white slurry; and drying and roasting to obtain the CeO-WO3/TiO2 catalyst. The catalyst has high activity, strong sulfur and water resistance and good temperature adaptability and reduces environment pollution and cost, and the preparation method has simple process.
Description
Technical field
The present invention relates to the catalyst and the preparation field thereof of simple substance mercury (Hg0) oxidation, be specifically related to a kind of Catalysts and its preparation method that is used for oxidizing flue gas elementary mercury of coal-fired power plant.
Background technology
Mercury Hg is a kind of severe toxicity, and long-distance migration has very big harm at the high material of organism cumulative bad to health and ecological environment, the simple substance mercury (Hg of coal-fired process discharging
0) be the primary pollution source source of big bicycle pump, its not only transnational transmission in atmosphere also enters soil and surface water in modes such as dried wet depositions, finally with the enrichment in human body and other biological body of forms such as methyl mercury, causes various environmental pollutions and disease.Mercury in the coal-fired flue-gas is mainly with simple substance attitude mercury (Hg
0), oxidation state mercury (Hg
2+) and three kinds of forms existence of particle mercury (Hgp).Because oxidation state mercury (Hg
2+) and particle mercury (Hgp) proportion in flue gas little and easily be desulfurized device and dust arrester and absorb, and simple substance mercury is volatile and be insoluble in water, therefore, to being controlled to of simple substance mercury emissions the emphasis of current research and control.
The catalyst research of simple substance mercury oxidation has been obtained some progress at present, SCR (selective catalytic reduction wherein, SCR) catalyst has obtained paying attention to the transformation of simple substance mercury, studies show that, 300-400 ℃ is the optimum temperature interval that the SCR catalyst is realized catalyzed conversion, confirmed that now the SCR catalyst under suitable condition can be with simple substance mercury catalytic oxidation, but research does not at present obtain ripe high-efficiency method as yet in the hope of using.Publication number is CN1698931, the catalysed oxidation processes that the patent of invention that name is called " flue gas hydrargyrum-removing method by catalytic oxidation " proposes a kind of flue gas mercury utilizes Fe, Co, Ni, Cu, the oxide of transition metal such as Mn be as active component catalytic oxidation simple substance mercury, and cardinal principle is that the Lattice Oxygen by catalyst becomes mercury oxide (HgO) to the simple substance mercury oxidation, and be adsorbed on catalyst surface, yet this patent is not considered flue gas composition gas, as HCl, and SO
2Etc. the influence of factor, and SO
2Existence this class activity of such catalysts is suppressed highly significant; Publication number is CN101528343, and the patent of invention that name is called " oxidation catalyst of mercury metal " proposes molybdenum and vanadium compound oxidizing catalyst (MoV
2O
8), good simple substance mercury transformation efficiency is arranged under the situation that does not increase catalyst amount, do not improve SO simultaneously
2Oxidation susceptibility, this catalyst integral body has the function of denitrating catalyst, therefore is difficult to apply yet molybdenum and vanadium all are high toxicity, high pollution heavy metal; The patent of invention that publication number is called " method for removing hydrargyrum from coal burning boiler flue gas by ozone oxidation " for the CN1768904 name proposes the method for ozone oxidation flue gas mercury, requires to spray into ozone (O in temperature range is 110-150 ℃ boiler flue
3), the simple substance mercury oxidation is become divalence mercury (Hg
2+), and the reaction time be at least 0.5s, this method has been introduced new polluter to flue gas on the one hand, on the other hand low, reaction time of temperature window require harsh, simultaneously because the extremely strong oxidation activity of ozone, can be with the most of SO in the flue gas
2Change into SO
3, and then under the effect of water, form sulfuric acid corrosion flue equipment.
Summary of the invention
In order to overcome the shortcoming of above-mentioned prior art, the objective of the invention is to propose a kind of Catalysts and its preparation method that is used for oxidizing flue gas elementary mercury of coal-fired power plant, catalyst has active high, anti-sulphur water repelling property is strong, the characteristics that thermal adaptability is good, alleviated the pollution to environment, reduced cost, its preparation method has advantage of simple technology.
In order to achieve the above object, the technical solution used in the present invention is:
A kind of catalyst that is used for oxidizing flue gas elementary mercury of coal-fired power plant, adopting the titanium dioxide of Detitanium-ore-type is carrier, and cerium oxide is main active component, and tungstic acid is the inferior active component of performance cooperative effect, and it is expressed as CeO
2-WO
3/ TiO
2, main active component CeO
2Form with cerous nitrate adds, and content is the 1-9% of catalyst quality percentage composition, inferior active component WO
3Form with ammonium paratungstate adds, and content is the 6-9% of catalyst quality percentage composition.
A kind of Preparation of catalysts method that is used for oxidizing flue gas elementary mercury of coal-fired power plant may further comprise the steps:
The first step, configuration concentration are the oxalic acid solution of 25g/L, add the ammonium paratungstate powder in oxalic acid solution, and the quality of ammonium paratungstate is 3%～5% of an oxalic acid solution quality, adds thermal agitation in 30～50 ℃ of water-baths then, until forming clear solution;
Second step took by weighing the cerous nitrate powder, and the cerous nitrate quality is 1%～10% of an oxalic acid solution quality, and the cerous nitrate powder is added in the clear solution that the first step makes, and formed flocculent deposit, added thermal agitation 30 minutes in 30～50 ℃ of water-baths then;
The 3rd step, the made precipitation solution that contains of second step was put in the supersonic wave cleaning machine ultrasonic immersing 2～4 hours, then toward wherein adding titania powder, the titanium dioxide quality is 25%～35% of an oxalic acid solution quality, and adding deionized water, the quality of deionized water is 3～4 times of oxalic acid solution quality, stirs 2～4 hours again, obtains white slurry;
The 4th step, made white slurry of the 3rd step was put in the supersonic wave cleaning machine ultrasonic immersing 2～4 hours, 110 ℃ of baking oven inner dryings 10～12 hours, put into Muffle furnace more then in 500 ℃ of roastings 4～5 hours, obtain CeO
2-WO
3/ TiO
2Catalyst.
Main active component is a transition metal on the traditional sense because the present invention has changed, thereby has alleviated the pollution to environment, has also reduced cost; Because the present invention has added tungstic acid, optimized the primary and secondary active component of catalyst, thereby the concerted catalysis effect between the performance active component, effectively improved the performance of catalyst, so have active high, anti-sulphur water repelling property is strong, the advantage that thermal adaptability is good, the simple substance mercury of composite oxide catalysts of the present invention in still can the efficiently catalyzing and oxidizing coal-fired flue-gas in the presence of water and sulfur dioxide, metal oxide catalyst of the present invention is in 200-500 ℃ of scope, and the oxidation efficiency of simple substance mercury reaches more than 80%.
The specific embodiment
Below in conjunction with embodiment preparation method of the present invention is described in detail.
Embodiment 1
A kind of catalyst that is used for oxidizing flue gas elementary mercury of coal-fired power plant, adopting the titanium dioxide of Detitanium-ore-type is carrier, and cerium oxide is main active component, and tungstic acid is the inferior active component of performance cooperative effect, and it is expressed as 1wt%CeO
2-9wt%WO
3/ TiO
21wt%CeO
2-9wt%WO
3/ TiO
2Composite oxide catalysts, main active component CeO
2Form with cerous nitrate adds, and content is 1% of catalyst quality percentage composition, inferior active component WO
3Form with ammonium paratungstate adds, and content is 9% of catalyst quality percentage composition.
A kind of Preparation of catalysts method that is used for oxidizing flue gas elementary mercury of coal-fired power plant may further comprise the steps:
The first step, configuration concentration are the oxalic acid solution of 25g/L, add the ammonium paratungstate powder in oxalic acid solution, and the quality of ammonium paratungstate is 4.3% of an oxalic acid solution quality, adds thermal agitation in 40 ℃ of water-baths then, until forming clear solution;
Second step took by weighing the cerous nitrate powder, and the cerous nitrate quality is 1.0% of an oxalic acid solution quality, and the cerous nitrate powder is added in the clear solution that the first step makes, and formed flocculent deposit, added thermal agitation 30 minutes in 40 ℃ of water-baths then;
The 3rd step, the made precipitation solution that contains of second step was put in the supersonic wave cleaning machine ultrasonic immersing 2 hours, then toward wherein adding titania powder, the titanium dioxide quality is 30.0% of an oxalic acid solution quality, and adding deionized water, the quality of deionized water is 4 times of oxalic acid solution quality, stirs 2 hours again, obtains white slurry;
The 4th step, made white slurry of the 3rd step was put in the supersonic wave cleaning machine ultrasonic immersing 2 hours, 110 ℃ of baking oven inner dryings 12 hours, put into Muffle furnace more then in 500 ℃ of roastings 4 hours, obtain 1wt%CeO
2-9wt%WO
3/ TiO
2Catalyst.
Under 200 ℃, 300 ℃, 400 ℃ and 500 ℃ of four temperature conditions, catalyst oxidation simple substance mercury (Hg
0) conversion ratio see attached list.
Embodiment 2
A kind of catalyst that is used for oxidizing flue gas elementary mercury of coal-fired power plant, adopting the titanium dioxide of Detitanium-ore-type is carrier, and cerium oxide is main active component, and tungstic acid is the inferior active component of performance cooperative effect, and it is expressed as 3wt%CeO
2-9wt%WO
3/ TiO
23wt%CeO
2-9wt%WO
3/ TiO
2Composite oxide catalysts, main active component CeO
2Form with cerous nitrate adds, and content is 3% of catalyst quality percentage composition, inferior active component WO
3Form with ammonium paratungstate adds, and content is 9% of catalyst quality percentage composition.
A kind of Preparation of catalysts method that is used for oxidizing flue gas elementary mercury of coal-fired power plant may further comprise the steps:
The first step, configuration concentration are the oxalic acid solution of 25g/L, add the ammonium paratungstate powder in oxalic acid solution, and the quality of ammonium paratungstate is 4.3% of an oxalic acid solution quality, adds thermal agitation in 45 ℃ of water-baths then, until forming clear solution;
Second step took by weighing the cerous nitrate powder, and the cerous nitrate quality is 3.1% of an oxalic acid solution quality, and the cerous nitrate powder is added in the clear solution that the first step makes, and formed flocculent deposit, added thermal agitation 30 minutes in 45 ℃ of water-baths then;
The 3rd step, the made precipitation solution that contains of second step was put in the supersonic wave cleaning machine ultrasonic immersing 3 hours, then toward wherein adding titania powder, the titanium dioxide quality is 29.3% of an oxalic acid solution quality, and adding deionized water, the quality of deionized water is 4 times of oxalic acid solution quality, stirs 2 hours again, obtains white slurry;
The 4th step, made white slurry of the 3rd step was put in the supersonic wave cleaning machine ultrasonic immersing 3 hours, 110 ℃ of baking oven inner dryings 12 hours, put into Muffle furnace more then in 500 ℃ of roastings 4 hours, obtain 3wt%CeO
2-9wt%WO
3/ TiO
2Catalyst.
Under 200 ℃, 300 ℃, 400 ℃ and 500 ℃ of four temperature conditions, catalyst oxidation simple substance mercury (Hg
0) conversion ratio see attached list.
Embodiment 3
A kind of catalyst that is used for oxidizing flue gas elementary mercury of coal-fired power plant, adopting the titanium dioxide of Detitanium-ore-type is carrier, and cerium oxide is main active component, and tungstic acid is the inferior active component of performance cooperative effect, and it is expressed as 5wt%CeO
2-9wt%WO
3/ TiO
2, 5wt%CeO
2-9wt%WO
3/ TiO
2Composite oxide catalysts, main active component CeO
2Form with cerous nitrate adds, and content is 5% of catalyst quality percentage composition, inferior active component WO
3Form with ammonium paratungstate adds, and content is 9% of catalyst quality percentage composition.
A kind of Preparation of catalysts method that is used for oxidizing flue gas elementary mercury of coal-fired power plant may further comprise the steps:
The first step, configuration concentration are the oxalic acid solution of 25g/L, add the ammonium paratungstate powder in oxalic acid solution, and the quality of ammonium paratungstate is 4.3% of an oxalic acid solution quality, adds thermal agitation in 35 ℃ of water-baths then, until forming clear solution;
Second step took by weighing the cerous nitrate powder, and the cerous nitrate quality is 5.2% of an oxalic acid solution quality, and the cerous nitrate powder is added in the clear solution that the first step makes, and formed flocculent deposit, added thermal agitation 30 minutes in 35 ℃ of water-baths then;
The 3rd step, the made precipitation solution that contains of second step was put in the supersonic wave cleaning machine ultrasonic immersing 4 hours, then toward wherein adding titania powder, the titanium dioxide quality is 28.7% of an oxalic acid solution quality, and adding deionized water, the quality of deionized water is 4 times of oxalic acid solution quality, stirs 4 hours again, obtains white slurry;
The 4th step, made white slurry of the 3rd step was put in the supersonic wave cleaning machine ultrasonic immersing 3 hours, 110 ℃ of baking oven inner dryings 11 hours, put into Muffle furnace more then in 500 ℃ of roastings 4 hours, obtain 5wt%CeO
2-9wt%WO
3/ TiO
2Catalyst.
Under 200 ℃, 300 ℃, 400 ℃ and 500 ℃ of four temperature conditions, catalyst oxidation simple substance mercury (Hg
0) conversion ratio see attached list.
Embodiment 4
A kind of catalyst that is used for oxidizing flue gas elementary mercury of coal-fired power plant, adopting the titanium dioxide of Detitanium-ore-type is carrier, and cerium oxide is main active component, and tungstic acid is the inferior active component of performance cooperative effect, and it is expressed as 7wt%CeO
2-9wt%WO
3/ TiO
2, 7wt%CeO
2-9wt%WO
3/ TiO
2Composite oxide catalysts, main active component CeO
2Form with cerous nitrate adds, and content is 7% of catalyst quality percentage composition, inferior active component WO
3Form with ammonium paratungstate adds, and content is 9% of catalyst quality percentage composition.
A kind of Preparation of catalysts method that is used for oxidizing flue gas elementary mercury of coal-fired power plant may further comprise the steps:
The first step, configuration concentration are the oxalic acid solution of 25g/L, add the ammonium paratungstate powder in oxalic acid solution, and the quality of ammonium paratungstate is 4.3% of an oxalic acid solution quality, adds thermal agitation in 50 ℃ of water-baths then, until forming clear solution;
Second step took by weighing the cerous nitrate powder, and the cerous nitrate quality is 7.2% of an oxalic acid solution quality, and the cerous nitrate powder is added in the clear solution that the first step makes, and formed flocculent deposit, added thermal agitation 30 minutes in 40 ℃ of water-baths then;
The 3rd step, the made precipitation solution that contains of second step was put in the supersonic wave cleaning machine ultrasonic immersing 2 hours, then toward wherein adding titania powder, the titanium dioxide quality is 28.0% of an oxalic acid solution quality, and adding deionized water, the quality of deionized water is 4 times of oxalic acid solution quality, stirs 2 hours again, obtains white slurry;
The 4th step, made white slurry of the 3rd step was put in the supersonic wave cleaning machine ultrasonic immersing 2 hours, 110 ℃ of baking oven inner dryings 10 hours, put into Muffle furnace more then in 500 ℃ of roastings 4 hours, obtain 7wt%CeO
2-9wt%WO
3/ TiO
2Catalyst.
Under 200 ℃, 300 ℃, 400 ℃ and 500 ℃ of four temperature conditions, the conversion ratio of catalyst oxidation simple substance mercury (Hg0) is seen attached list.
Embodiment 5
A kind of catalyst that is used for oxidizing flue gas elementary mercury of coal-fired power plant, adopting the titanium dioxide of Detitanium-ore-type is carrier, and cerium oxide is main active component, and tungstic acid is the inferior active component of performance cooperative effect, and it is expressed as 9wt%CeO
2-9wt%WO
3/ TiO
2, 9wt%CeO
2-9wt%WO
3/ TiO
2Composite oxide catalysts, main active component CeO
2Form with cerous nitrate adds, and content is 9% of catalyst quality percentage composition, inferior active component WO
3Form with ammonium paratungstate adds, and content is 9% of catalyst quality percentage composition.
A kind of Preparation of catalysts method that is used for oxidizing flue gas elementary mercury of coal-fired power plant may further comprise the steps:
The first step, configuration concentration are the oxalic acid solution of 25g/L, add the ammonium paratungstate powder in oxalic acid solution, and the quality of ammonium paratungstate is 4.3% of an oxalic acid solution quality, adds thermal agitation in 40 ℃ of water-baths then, until forming clear solution;
Second step took by weighing the cerous nitrate powder, and the cerous nitrate quality is 9.3% of an oxalic acid solution quality, and the cerous nitrate powder is added in the clear solution that the first step makes, and formed flocculent deposit, added thermal agitation 30 minutes in 40 ℃ of water-baths then;
The 3rd step, the made precipitation solution that contains of second step was put in the supersonic wave cleaning machine ultrasonic immersing 2 hours, then toward wherein adding titania powder, the titanium dioxide quality is 27.3% of an oxalic acid solution quality, and adding deionized water, the quality of deionized water is 4 times of oxalic acid solution quality, stirs 2 hours again, obtains white slurry;
The 4th step, made white slurry of the 3rd step was put in the supersonic wave cleaning machine ultrasonic immersing 2 hours, 110 ℃ of baking oven inner dryings 12 hours, put into Muffle furnace more then in 500 ℃ of roastings 4 hours, obtain 9wt%CeO
2-9wt%WO
3/ TiO
2Catalyst.
Under 200 ℃, 300 ℃, 400 ℃ and 500 ℃ of four temperature conditions, catalyst oxidation simple substance mercury (Hg
0) conversion ratio see attached list.
Subordinate list: unequally loaded Ce catalyst is at each temperature simple substance mercury (Hg
0) conversion ratio
Claims (10)
1. catalyst that is used for oxidizing flue gas elementary mercury of coal-fired power plant is characterized in that: adopting the titanium dioxide of Detitanium-ore-type is carrier, and cerium oxide is main active component, and tungstic acid is the inferior active component of performance cooperative effect, and it is expressed as CeO
2-WO
3/ TiO
2, main active component CeO
2Form with cerous nitrate adds, and content is the 1-9% of catalyst quality percentage composition, inferior active component WO
3Form with ammonium paratungstate adds, and content is the 6-9% of catalyst quality percentage composition.
2. a kind of catalyst that is used for oxidizing flue gas elementary mercury of coal-fired power plant according to claim 1, it is characterized in that: adopting the titanium dioxide of Detitanium-ore-type is carrier, cerium oxide is main active component, and tungstic acid is the inferior active component of performance cooperative effect, and it is expressed as 1wt%CeO
2-9wt%WO
3/ TiO
2, main active component CeO
2Form with cerous nitrate adds, and content is 1% of catalyst quality percentage composition, inferior active component WO
3Form with ammonium paratungstate adds, and content is 9% of catalyst quality percentage composition.
3. a kind of catalyst that is used for oxidizing flue gas elementary mercury of coal-fired power plant according to claim 1, it is characterized in that: adopting the titanium dioxide of Detitanium-ore-type is carrier, cerium oxide is main active component, and tungstic acid is the inferior active component of performance cooperative effect, and it is expressed as 3wt%CeO
2-9wt%WO
3/ TiO
2, main active component CeO
2Form with cerous nitrate adds, and content is 3% of catalyst quality percentage composition, inferior active component WO
3Form with ammonium paratungstate adds, and content is 9% of catalyst quality percentage composition.
4. a kind of catalyst that is used for oxidizing flue gas elementary mercury of coal-fired power plant according to claim 1, it is characterized in that: adopting the titanium dioxide of Detitanium-ore-type is carrier, cerium oxide is main active component, and tungstic acid is the inferior active component of performance cooperative effect, and it is expressed as 5wt%CeO
2-9wt%WO
3/ TiO
2, main active component CeO
2Form with cerous nitrate adds, and content is 5% of catalyst quality percentage composition, inferior active component WO
3Form with ammonium paratungstate adds, and content is 9% of catalyst quality percentage composition.
5. a kind of catalyst that is used for oxidizing flue gas elementary mercury of coal-fired power plant according to claim 1, it is characterized in that: adopting the titanium dioxide of Detitanium-ore-type is carrier, cerium oxide is main active component, and tungstic acid is the inferior active component of performance cooperative effect, and it is expressed as 7wt%CeO
2-9wt%WO
3/ TiO
2, main active component CeO
2Form with cerous nitrate adds, and content is 7% of catalyst quality percentage composition, inferior active component WO
3Form with ammonium paratungstate adds, and content is 9% of catalyst quality percentage composition.
6. a kind of catalyst that is used for oxidizing flue gas elementary mercury of coal-fired power plant according to claim 1, it is characterized in that: adopting the titanium dioxide of Detitanium-ore-type is carrier, cerium oxide is main active component, and tungstic acid is the inferior active component of performance cooperative effect, and it is expressed as 9wt%CeO
2-9wt%WO
3/ TiO
2, main active component CeO
2Form with cerous nitrate adds, and content is 9% of catalyst quality percentage composition, inferior active component WO
3Form with ammonium paratungstate adds, and content is 9% of catalyst quality percentage composition.
7. Preparation of catalysts method that is used for oxidizing flue gas elementary mercury of coal-fired power plant is characterized in that: may further comprise the steps:
The first step, configuration concentration are the oxalic acid solution of 25g/L, add the ammonium paratungstate powder in oxalic acid solution, and the quality of ammonium paratungstate is 3%～5% of an oxalic acid solution quality, adds thermal agitation in 30～50 ℃ of water-baths then, until forming clear solution;
Second step took by weighing the cerous nitrate powder, and the cerous nitrate quality is 1%～10% of an oxalic acid solution quality, and the cerous nitrate powder is added in the clear solution that the first step makes, and formed flocculent deposit, added thermal agitation 30 minutes in 30～50 ℃ of water-baths then;
The 3rd step, the made precipitation solution that contains of second step was put in the supersonic wave cleaning machine ultrasonic immersing 2～4 hours, then toward wherein adding titania powder, the titanium dioxide quality is 25%～35% of an oxalic acid solution quality, and adding deionized water, the quality of deionized water is 3～4 times of oxalic acid solution quality, stirs 2～4 hours again, obtains white slurry;
The 4th step, made white slurry of the 3rd step was put in the supersonic wave cleaning machine ultrasonic immersing 2～4 hours, 110 ℃ of baking oven inner dryings 10～12 hours, put into Muffle furnace more then in 500 ℃ of roastings 4～5 hours, obtain CeO
2-WO
3/ TiO
2Catalyst.
8. a kind of Preparation of catalysts method that is used for oxidizing flue gas elementary mercury of coal-fired power plant according to claim 7 is characterized in that: may further comprise the steps:
The first step, configuration concentration are the oxalic acid solution of 25g/L, add the ammonium paratungstate powder in oxalic acid solution, and the quality of ammonium paratungstate is 4.3% of an oxalic acid solution quality, adds thermal agitation in 40 ℃ of water-baths then, until forming clear solution;
Second step took by weighing the cerous nitrate powder, and the cerous nitrate quality is 1.0% of an oxalic acid solution quality, and the cerous nitrate powder is added in the clear solution that the first step makes, and formed flocculent deposit, added thermal agitation 30 minutes in 40 ℃ of water-baths then;
The 3rd step, the made precipitation solution that contains of second step was put in the supersonic wave cleaning machine ultrasonic immersing 2 hours, then toward wherein adding titania powder, the titanium dioxide quality is 30.0% of an oxalic acid solution quality, and adding deionized water, the quality of deionized water is 4 times of oxalic acid solution quality, stirs 2 hours again, obtains white slurry;
The 4th step, made white slurry of the 3rd step was put in the supersonic wave cleaning machine ultrasonic immersing 2 hours, 110 ℃ of baking oven inner dryings 12 hours, put into Muffle furnace more then in 500 ℃ of roastings 4 hours, obtain 1wt%CeO
2-9wt%WO
3/ TiO
2Catalyst.
9. a kind of Preparation of catalysts method that is used for oxidizing flue gas elementary mercury of coal-fired power plant according to claim 7 is characterized in that: may further comprise the steps:
The first step, configuration concentration are the oxalic acid solution of 25g/L, add the ammonium paratungstate powder in oxalic acid solution, and the quality of ammonium paratungstate is 4.3% of an oxalic acid solution quality, adds thermal agitation in 35 ℃ of water-baths then, until forming clear solution;
Second step took by weighing the cerous nitrate powder, and the cerous nitrate quality is 5.2% of an oxalic acid solution quality, and the cerous nitrate powder is added in the clear solution that the first step makes, and formed flocculent deposit, added thermal agitation 30 minutes in 35 ℃ of water-baths then;
The 3rd step, the made precipitation solution that contains of second step was put in the supersonic wave cleaning machine ultrasonic immersing 4 hours, then toward wherein adding titania powder, the titanium dioxide quality is 28.7% of an oxalic acid solution quality, and adding deionized water, the quality of deionized water is 4 times of oxalic acid solution quality, stirs 4 hours again, obtains white slurry;
The 4th step, made white slurry of the 3rd step was put in the supersonic wave cleaning machine ultrasonic immersing 3 hours, 110 ℃ of baking oven inner dryings 11 hours, put into Muffle furnace more then in 500 ℃ of roastings 4 hours, obtain 5wt%CeO
2-9wt%WO
3/ TiO
2Catalyst.
10. a kind of Preparation of catalysts method that is used for oxidizing flue gas elementary mercury of coal-fired power plant according to claim 7 is characterized in that: may further comprise the steps:
The first step, configuration concentration are the oxalic acid solution of 25g/L, add the ammonium paratungstate powder in oxalic acid solution, and the quality of ammonium paratungstate is 4.3% of an oxalic acid solution quality, adds thermal agitation in 40 ℃ of water-baths then, until forming clear solution;
Second step took by weighing the cerous nitrate powder, and the cerous nitrate quality is 9.3% of an oxalic acid solution quality, and the cerous nitrate powder is added in the clear solution that the first step makes, and formed flocculent deposit, added thermal agitation 30 minutes in 40 ℃ of water-baths then;
The 3rd step, the made precipitation solution that contains of second step was put in the supersonic wave cleaning machine ultrasonic immersing 2 hours, then toward wherein adding titania powder, the titanium dioxide quality is 27.3% of an oxalic acid solution quality, and adding deionized water, the quality of deionized water is 4 times of oxalic acid solution quality, stirs 2 hours again, obtains white slurry;
The 4th step, made white slurry of the 3rd step was put in the supersonic wave cleaning machine ultrasonic immersing 2 hours, 110 ℃ of baking oven inner dryings 12 hours, put into Muffle furnace more then in 500 ℃ of roastings 4 hours, obtain 9wt%CeO
2-9wt%WO
3/ TiO
2Catalyst.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101762930A CN101829561B (en) | 2010-05-18 | 2010-05-18 | Catalyst for oxidizing flue gas elementary mercury of coal-fired power plant and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101762930A CN101829561B (en) | 2010-05-18 | 2010-05-18 | Catalyst for oxidizing flue gas elementary mercury of coal-fired power plant and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101829561A true CN101829561A (en) | 2010-09-15 |
| CN101829561B CN101829561B (en) | 2012-06-06 |
Family
ID=42713865
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010101762930A Expired - Fee Related CN101829561B (en) | 2010-05-18 | 2010-05-18 | Catalyst for oxidizing flue gas elementary mercury of coal-fired power plant and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101829561B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103706371A (en) * | 2013-12-30 | 2014-04-09 | 重庆大学 | Ultra-low V mercury-removing catalyst containing Ce and preparation method thereof |
| CN104437535A (en) * | 2014-11-20 | 2015-03-25 | 清华大学 | Environment-friendly manganese-cobalt-aluminum composite oxide mercury removal and denitration catalyst and preparation method thereof |
| CN111330607A (en) * | 2020-03-04 | 2020-06-26 | 大唐南京环保科技有限责任公司 | Environment-friendly denitration catalyst and preparation method thereof |
| CN115869936A (en) * | 2022-11-17 | 2023-03-31 | 安徽元琛环保科技股份有限公司 | Preparation method of wide-temperature cerium-based denitration catalyst and catalyst prepared by using same |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6719828B1 (en) * | 2001-04-30 | 2004-04-13 | John S. Lovell | High capacity regenerable sorbent for removal of mercury from flue gas |
| CN1698931A (en) * | 2005-04-07 | 2005-11-23 | 上海交通大学 | Flue gas hydrargyrum-removing method by catalytic oxidation |
| WO2006037213A1 (en) * | 2004-10-01 | 2006-04-13 | William Digdon | Composition and method for oxidizing mercury in combustion processes |
| CN101528343A (en) * | 2006-09-22 | 2009-09-09 | 巴布考克日立株式会社 | Catalyst for oxidation of metal mercury |
-
2010
- 2010-05-18 CN CN2010101762930A patent/CN101829561B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6719828B1 (en) * | 2001-04-30 | 2004-04-13 | John S. Lovell | High capacity regenerable sorbent for removal of mercury from flue gas |
| WO2006037213A1 (en) * | 2004-10-01 | 2006-04-13 | William Digdon | Composition and method for oxidizing mercury in combustion processes |
| CN1698931A (en) * | 2005-04-07 | 2005-11-23 | 上海交通大学 | Flue gas hydrargyrum-removing method by catalytic oxidation |
| CN101528343A (en) * | 2006-09-22 | 2009-09-09 | 巴布考克日立株式会社 | Catalyst for oxidation of metal mercury |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103706371A (en) * | 2013-12-30 | 2014-04-09 | 重庆大学 | Ultra-low V mercury-removing catalyst containing Ce and preparation method thereof |
| CN103706371B (en) * | 2013-12-30 | 2015-09-09 | 重庆大学 | A kind of containing ultralow V demercuration catalyst of Ce and preparation method thereof |
| CN104437535A (en) * | 2014-11-20 | 2015-03-25 | 清华大学 | Environment-friendly manganese-cobalt-aluminum composite oxide mercury removal and denitration catalyst and preparation method thereof |
| CN111330607A (en) * | 2020-03-04 | 2020-06-26 | 大唐南京环保科技有限责任公司 | Environment-friendly denitration catalyst and preparation method thereof |
| CN111330607B (en) * | 2020-03-04 | 2023-02-28 | 大唐南京环保科技有限责任公司 | Environment-friendly denitration catalyst and preparation method thereof |
| CN115869936A (en) * | 2022-11-17 | 2023-03-31 | 安徽元琛环保科技股份有限公司 | Preparation method of wide-temperature cerium-based denitration catalyst and catalyst prepared by using same |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101829561B (en) | 2012-06-06 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101590404B (en) | Low-vanadium denitration catalyst and preparation method and application thereof | |
| CN101721992A (en) | Ceria-based denitration catalyst and preparation method thereof | |
| CN103769083B (en) | A kind of NO_x Reduction by Effective composite oxide catalysts and its preparation method and application | |
| CN101879452B (en) | Manganese-based low-temperature denitration catalyst and preparation method thereof | |
| CN107649116A (en) | Cerium tin composite oxides denitrating catalyst and its preparation method and application | |
| CN103962126B (en) | Catalyst for selectively catalyzing and reducing nitrogen oxides and preparation method thereof | |
| CN105771961B (en) | A kind of CeO2Nanotube supported denitrating catalyst and preparation method thereof | |
| CN102909003A (en) | Cerium vanadium titanium catalyst for catalytic reduction of nitrogen oxide and preparation method and application of cerium vanadium titanium catalyst | |
| CN103990496A (en) | Middle and low temperature SCR denitration catalyst with anti-poisoning performance, and preparation method thereof | |
| CN102553572A (en) | Selective catalytic reduction (SCR) catalyst of wide active temperature window and preparation method thereof | |
| CN105797714B (en) | A kind of manganese titanium composite oxide low-temperature denitration catalyst and preparation method thereof that holmium is modified | |
| CN111097442B (en) | Flue gas synergistic denitration and demercuration catalyst and preparation method thereof | |
| CN101829561B (en) | Catalyst for oxidizing flue gas elementary mercury of coal-fired power plant and preparation method thereof | |
| CN102101048A (en) | Cerium-based denitration catalyst with titanium-silicon compound oxide as carrier and preparation and application thereof | |
| CN112742413A (en) | Low-temperature SCR denitration catalyst and preparation method and application thereof | |
| CN105233814A (en) | Cerium oxide catalyst for catalyzing and purifying nitric oxides, preparation method and application | |
| JP5787901B2 (en) | NOx removal catalyst carrier, NOx removal catalyst and NOx removal device | |
| CN102989447A (en) | Manganese-tin-titanium type SCR (Selective Catalytic Reduction) NOx removal catalyst and preparation method thereof | |
| KR101717319B1 (en) | Nox reduction catalyst for exhaust gas of biomass combustion and nox reduction method | |
| CN105457646B (en) | A kind of middle low-temperature denitration catalyst and preparation method thereof with protective layer | |
| CN106362733A (en) | High-temperature resistant manganite catalyst and preparation method thereof | |
| CN108236943A (en) | A kind of preparation method of vanadium oxide catalyst | |
| CN109201108A (en) | The preparation method and application method of the carrier loaded manganese oxide catalyst of bi-component | |
| CN104437535A (en) | Environment-friendly manganese-cobalt-aluminum composite oxide mercury removal and denitration catalyst and preparation method thereof | |
| CN106040226B (en) | A kind of cerium antimony composite oxide catalysts and its preparation method and application |
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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120606 |