CN1209176C - Composite oxide catalyst for eliminating SO2 and NOx in gas mixture simultaneously - Google Patents
Composite oxide catalyst for eliminating SO2 and NOx in gas mixture simultaneously Download PDFInfo
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- CN1209176C CN1209176C CNB001237942A CN00123794A CN1209176C CN 1209176 C CN1209176 C CN 1209176C CN B001237942 A CNB001237942 A CN B001237942A CN 00123794 A CN00123794 A CN 00123794A CN 1209176 C CN1209176 C CN 1209176C
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- catalyst
- tin ash
- sulfur dioxide
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- 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
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- Exhaust Gas Treatment By Means Of Catalyst (AREA)
Abstract
The present invention relates to a catalyst for simultaneously eliminating sulfur dioxide and oxynitride in gas mixture. More specifically, the catalyst is compound oxide composed of titanium dioxide and tin dioxide and is in a rutile structure. The catalyst is prepared by a coprecipitation method. Carbon monoxide is used as reducing agents under the existence of the catalyst, and sulfur dioxide and oxynitride can be converted into S and N2 without reference to the simultaneous existence or the single existence of sulfur dioxide and oxynitride. The catalyst is used for more than 30 hours under the condition of laboratories, the activity is not lowered, and the present invention is an ideal catalyst for eliminating atmospheric pollution.
Description
The present invention relates to a kind of composite oxide catalysts of eliminating sulfur dioxide and nitrogen oxide in the gaseous mixture simultaneously.
Contamination gas sulfur dioxide and the nitrogen oxide eliminated in the gas are the human not contaminated important measures of atmosphere of depending on for existence of protection; in the prior art; the process of eliminating sulfur dioxide and nitrogen oxide is to eliminate the catalyst of sulfur dioxide and the catalyst mix use of elimination nitrogen oxide separately separately; eliminate sulfur dioxide earlier and eliminate nitrogen oxide again; or eliminate nitrogen oxide earlier and eliminate sulfur dioxide again; long flow path, complex process.Because this deficiency needs a kind of catalyst that can eliminate sulfur dioxide and nitrogen oxide simultaneously and can simplify technological process.
The purpose of this invention is to provide and a kind ofly can eliminate the sulfur dioxide in the gaseous mixture and the catalyst of nitrogen oxide simultaneously, and be referred to as integrated catalyst, no matter the two common exists or individualism all can eliminate it.
Of the present inventionly eliminate sulfur dioxide in the gaseous mixture simultaneously and the catalyst of nitrogen oxide is the composite oxides of titanium dioxide and tin ash, have rutile structure,, specific surface is 100-110m
2g
-1This catalyst makes with coprecipitation, and wherein the content of tin ash in catalyst is the 20-80% of total catalyst weight, and preferably 50%.
Preparation of catalysts method of the present invention, this method comprises:
A. prepare titanium sulfate (Ti (SO according to the component and the weight ratio thereof of catalyst
4)
2) and the butter of tin mixed aqueous solution,
B. above mixed aqueous solution and ammoniacal liquor are splashed in the secondary deionized water simultaneously, keep pH=7-8, sediment is aging in mother liquor will to be precipitated with secondary deionized water and wash after 1 hour, can not detect chlorion (Cl in cleaning solution
-) and sulfate ion (SO
4 2-) till,
C. the sediment after the above-mentioned washing was dried 10-18 hour at 110 ℃-130 ℃, subsequently, in 400-500 ℃ of roasting 3-5 hour, obtain titanium dioxide-tin ash compound, wherein the content of tin ash in catalyst is the 20-80% of total catalyst weight, preferably 50%.
D. the specific surface of this catalyst is 100-110m
2g
-1, and have rutile structure.
The characteristics of catalyst of the present invention and excellent effect thereof:
(i) can eliminate sulfur dioxide and nitrogen oxide in the gas simultaneously, and can only eliminate one of them in the prior art, said sulfur dioxide and the nitrogen oxide of eliminating simultaneously in the gas in the document that has, be actually and use, eliminate sulfur dioxide and nitrogen oxide successively eliminating the catalyst of sulfur dioxide and the catalyst mix of elimination nitrogen oxide.Obviously, integrated catalyst of the present invention has been simplified the technology of purifying contaminated gas.
(ii) sulfur dioxide not only is not poisonous substance to catalyst of the present invention, and can also promote the elimination of nitrogen oxide.
Catalyst (iii) of the present invention has the characteristics of active height, good stability, is reducing agent with the carbon monoxide,, at 350-400 ℃, SO
2Conversion ratio more than 95%, the conversion ratio of NO is 100%, generates the selectivity of S and generates N
2Selectivity be 100%.Reaction is carried out 30 hours catalyst activities and is not descended.
Catalyst of the present invention can be used for eliminating the contamination gas in the waste gas of flue gas or ebullated bed formula catalytic cracking catalyst regenerative process, comprising: sulfur dioxide, nitrogen oxide and carbon monoxide etc.
In order more to clearly demonstrate the present invention, enumerate following examples, but it there is not any restriction to scope of the present invention.
Embodiment 1 Preparation of catalysts
With 11.6317 gram SnCl
45H
2O and 15.0188 gram Ti (SO
4)
2Be dissolved in 200 milliliters of secondary deionized water, again 30 milliliters of concentrated ammonia liquors (25%) are dissolved in 150 milliliters of secondary deionized water, subsequently, above-mentioned two kinds of solution are splashed in the container that 100 milliliters of secondary deionized water are housed simultaneously, ceaselessly stir, the pH value that keeps solution is at 7-8, sediment wore out 1 hour in mother liquor, then, with secondary deionized water washing precipitation several times, in cleaning solution, can not detect Cl
-And SO
4 2-, sediment 500 ℃ of roastings 4 hours, promptly makes TiO subsequently 110-130 ℃ of oven dry 12-15 hour
2-SnO
2Composite oxide catalysts, wherein the weight ratio of tin oxide and titanium dioxide is 1: 1.
The use of embodiment 2 catalyst
Get 200 milligrams of the catalyst that embodiment 1 makes, granularity 40-80 order places reactor, feeds reaction gas (525ppm SO at 250-450 ℃
2, 520ppm NO, 2085ppm CO, all the other are argon gas) react, during air speed 2400
-1, at 350-400 ℃, SO
2Conversion ratio more than 95%, the conversion ratio of NO is 100%, generates the selectivity of S and generates N
2Selectivity be 100%.Reaction is carried out 30 hours catalyst activities and is not descended.
Claims (5)
1. change catalyst of eliminating sulfur dioxide or nitrogen oxide, it is characterized in that, described catalyst, the sulfur dioxide and the nitrogen oxide that can will be present in jointly in the gaseous mixture eliminate simultaneously, this catalyst is the composite oxides of titanium dioxide and tin ash, have rutile structure, this catalyst makes with coprecipitation, and wherein the content of tin ash in catalyst is the 20-80% of total catalyst weight.
2. according to the described catalyst of claim 1, it is characterized in that the content of the tin ash in the described catalyst in catalyst is 50% of total catalyst weight.
3. the described Preparation of catalysts method of claim 1 is characterized in that described method comprises:
A is according to component and the weight ratio preparation titanium sulfate and the butter of tin mixed aqueous solution of catalyst;
B. above mixed aqueous solution and ammoniacal liquor are splashed in the secondary deionized water simultaneously, keep pH=8-9, sediment is aging after 1 hour in mother liquor, will precipitate with secondary deionized water and wash, until can not detect chlorion and sulfate ion in cleaning solution till;
C. the sediment after the above-mentioned washing was dried 10-18 hour at 110 ℃-130 ℃, subsequently, in 400-500 ℃ of roasting 3-5 hour, obtain titanium dioxide-tin ash composite oxides, have rutile structure, wherein the content of tin ash in catalyst is the 20-80% of total catalyst weight.
4. according to the described Preparation of catalysts method of claim 3, it is characterized in that wherein the content of the tin ash described in the C. in catalyst is 50% of total catalyst weight.
5. the described Application of Catalyst of claim 1 is characterized in that, the described catalyst of claim 1 is placed reactor, feeds reaction gas at 250-450 ℃, during air speed 2000-3000
-1, at 300-400 ℃, SO
2Conversion ratio more than 95%, the conversion ratio of NO is 100%, generates the selectivity of S and generates N
2Selectivity be 100%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB001237942A CN1209176C (en) | 2000-09-07 | 2000-09-07 | Composite oxide catalyst for eliminating SO2 and NOx in gas mixture simultaneously |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB001237942A CN1209176C (en) | 2000-09-07 | 2000-09-07 | Composite oxide catalyst for eliminating SO2 and NOx in gas mixture simultaneously |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1288773A CN1288773A (en) | 2001-03-28 |
| CN1209176C true CN1209176C (en) | 2005-07-06 |
Family
ID=4590140
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB001237942A Expired - Fee Related CN1209176C (en) | 2000-09-07 | 2000-09-07 | Composite oxide catalyst for eliminating SO2 and NOx in gas mixture simultaneously |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1209176C (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1843575B (en) * | 2006-03-29 | 2012-07-04 | 华北电力大学 | Method and apparatus for optic catalytic oxidizing, desulfurizing and denitrifying flue gas simultaneously |
| CN102049257B (en) * | 2009-10-27 | 2013-07-24 | 中国石油化工股份有限公司 | Catalyst for simultaneously reducing SO2 and NO with CO as well as preparation and application of catalyst |
| WO2014132087A1 (en) * | 2013-03-01 | 2014-09-04 | Frank Cross Limited | Method for removing sulphur dioxide from gas streams, using titanium dioxide as catalyst |
-
2000
- 2000-09-07 CN CNB001237942A patent/CN1209176C/en not_active Expired - Fee Related
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| Publication number | Publication date |
|---|---|
| CN1288773A (en) | 2001-03-28 |
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