CN1229693A - Sorbent for simultaneously eliminating sulfur dioxide and nitrogen dioxide - Google Patents
Sorbent for simultaneously eliminating sulfur dioxide and nitrogen dioxide Download PDFInfo
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- CN1229693A CN1229693A CN99100358A CN99100358A CN1229693A CN 1229693 A CN1229693 A CN 1229693A CN 99100358 A CN99100358 A CN 99100358A CN 99100358 A CN99100358 A CN 99100358A CN 1229693 A CN1229693 A CN 1229693A
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- China
- Prior art keywords
- sorbent
- active carbon
- additive
- iodate
- active component
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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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- Treating Waste Gases (AREA)
Abstract
An adsorbent for removing SO2 and NO2 at same time, ordinary temp and ordinary pressure features use of activated carbon as carrier, iodate as active component and hydroxide of alkali metal as additive. Its advantages are efficient adsorption of SO2 and NO2 to less than 10 ppm at space speed of 18000/hr, room temp and ordinary pressure, high removing effect of SO2 and NO2 up to 99% if middle-porous activated carbon is used as carrier, no poison and long service life.
Description
The present invention removes SO in atmospheric environment under normal temperature, the normal pressure a kind of being used for
2And NO
2Sorbent.Particularly be applicable to SO in close cabin or the tunnel
2And NO
2Elimination.This sorbent also is applicable to stink and NO in any public place of entertainment that the crowd is dense
xProcessing.
Because the fast development of industry, each factory and enterprise exhaust gas discharged quantity and kind also increase thereupon.The discharging of sulfide and nitride is on the rise the atmosphere acidifying, forms large tracts of land acid rain.SO
2And NO
2Bigger to human body harm, be one of main poisonous substance of urban atmospheric pollution, for eliminating SO
2And NO
2The existing multiple technologies of pollution, as activated charcoal method, pulsed plasma method and electron beam irradiation method.The inventor has done comprehensive argumentation to existing adsorbent and catalyst in 1996 in the national active carbon exchanging meeting collection of thesis.
Lack effective SO at present
2And NO
2The time technology that removes.
In existing technology, all be to eliminate SO separately
2Or NO
2.Though technology such as plasma technique and electron beam irradiation can be used to eliminate simultaneously SO
2And NO
2, but whether reasonable whether feasible aspect such as technically and economically also exist many problems.The patent approaching with the present invention is US5,366,710, (1994), its carrier is activated sludge and MnO
2, MnO
4Mixture, contain Fe in the water capacity liquid of dipping
3+, reaction temperature is 200 ℃.Its carrier composition complexity, and purification condition has relatively high expectations, and another approaching work is 15 volume 5 phases (1994) of China's " environmental science ", the CuSO of report
4/ CuO catalyst, active component are CuO/Al
2O
3, its shortcoming be reaction temperature more than 400 ℃, just can make desulfuration efficiency surpass 90%, but under this temperature, some side reaction of denitration will progressively strengthen.
The purpose of this invention is to provide a kind of noble metal and transition metal of not containing, and under normal temperature, condition of normal pressure, efficiently be used for atmospheric environment and the SO of other closed in space
2And NO
2Purify the sorbent of usefulness, sorbent does not contain any toxicity (for example Cr) element simultaneously, and the life-span is long.
Sorbent of the present invention comprises carrier, active component and additive, and carrier wherein is an active carbon, and active component is an iodate, and additive is the hydroxide of alkali metal family, and each component percentages in the sorbent is: active carbon, 80% with; Iodate, 1-10%, more preferably 5-10%; Additive heavily be the 70-100% of the weight of active component, more preferably, the weight of additive is the 85-100% of the weight of active component.
The preparation method of sorbent of the present invention is as follows:
1, will screen good active carbon and boil with distilled water, washing is then 130～150 ℃ of dryings 4 hours.
2, iodate and the additive with alkali metal containing K or Na is mixed with certain density solution.
3, with 1 active carbon that makes by 75% water capacity with above-mentioned 2 solution impregnation, constantly stir 30-60min, 110 ℃ of activation 2 hours down, promptly obtain sorbent of the present invention then.
Active carbon can be selected broken shape, column or spheric active carbon for use in above-mentioned preparation process.
Preparation method that the present invention is preferable and application are described further by embodiment.
Example 1: the preparation of impregnated carbon
Active carbon is a ZX-15 column charcoal, and specific area is 1100m
2/ g boils above-mentioned charcoal with distilled water, washing is following dry 4 hours at 130～150 ℃ then.With KIO
32g, KOH1.6g are made into certain density solution, flood above-mentioned carrier 60 minutes, and constantly stir, and 110 ℃ of activation 2 hours, promptly get sorbent A of the present invention then.
Example 2
Preparation method according to example 1 replaces KOH with LiOH, and all the other are constant, prepares sorbent B.
Example 3
According to the method for example 1, all the other are constant to replace ZX-15 with the ZF-09 charcoal, prepare sorbent C.
Example 4
According to the preparation method of example 1, replace the ZX-15 charcoal with F400 12 * 30 charcoals, all the other are constant, prepare sorbent D.
Comparative Examples 2
According to the preparation method of example 1, do not add KIO during the preparation maceration extract
3, all the other are constant, prepare sorbent E.
The evaluation of example 5 sorbents
Above-mentioned sorbent A, B, C, D and Comparative Examples E are estimated, 15～30 ℃ of temperature, air speed 16,000～18, in the scope of 000-1, in the unstrpped gas, SO
2Concentration is 200～250ppm, NO
2Concentration is 100～150ppm, and all the other are N
2Gas, its result such as table 1.
Table 1 experimental result
| Adsorbent | Air speed (h -1) | Temperature (℃) | ?SO 2Population concentration (ppm) | SO 2Exit concentration (ppm) | ?SO 2Conversion ratio (%) | ??NO 2Population concentration (ppm) | ?NO 2Exit concentration (ppm) | ?NO 2Conversion ratio (%) |
| ???A | ?18,000 | ????15 | ????250.0 | ?????12.5 | ????95 | ????133.8 | ????12.17 | ???90.9 |
| ???B | ?18,000 | ????17 | ????255.0 | ?????37.7 | ????85 | ????138.5 | ????34.65 | ???74.9 |
| ???C | ?17,500 | ????18 | ????245.8 | ?????7.3 | ????97 | ????126.7 | ????10.95 | ???91.3 |
| ???D | ?18,000 | ????16 | ????237.5 | ?????3.0 | ????99 | ????129.8 | ????8.52 | ???93.4 |
| ???E | ?17,500 | ????20 | ????245.5 | ?????98.5 | ????60 | ????121.7 | ????61.1 | ???49.8 |
Claims (7)
1, a kind of normal temperature, normal pressure of being used for purifies SO down
2And NO
2Sorbent, comprise carrier, active component and additive, it is characterized in that, described carrier is an active carbon, and described active component is an iodate, and described additive is the hydroxide of alkali metal family, percentage in the described sorbent is: active carbon, more than 80%; Iodate, 1-10%; The weight of additive is the 80-100% of active component weight.
According to the described sorbent of claim 1, it is characterized in that 2, described active carbon proportion is 80-99%.
According to the described sorbent of claim 2, it is characterized in that 3, described active carbon proportion is 85-90%.
According to the described sorbent of claim 1, it is characterized in that 4, the shared ratio of described iodate is 5-10%.
According to the described sorbent of claim 1, it is characterized in that 5, the weight of described additive is the 85%-100% of active component weight.
According to the described sorbent of claim 1, it is characterized in that 6, described active carbon is to contain mesopore at the active carbon more than 40%.
7, a kind of normal temperature, normal pressure of being used for purifies SO down
2And NO
2The preparation method of sorbent, may further comprise the steps:
(1) will screen the active carbon of getting well and boil with distilled water, washing, following dry 4 hours at 130 ℃～150 ℃ then;
(2) iodate and additive are made certain density solution;
(3) in the solution that the rapid impouring 2 of 1 active carbon that makes is made, constantly stir 30～60min, activate 2 hours down at 110 ℃～120 ℃ then.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN99100358A CN1229693A (en) | 1999-01-21 | 1999-01-21 | Sorbent for simultaneously eliminating sulfur dioxide and nitrogen dioxide |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN99100358A CN1229693A (en) | 1999-01-21 | 1999-01-21 | Sorbent for simultaneously eliminating sulfur dioxide and nitrogen dioxide |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1229693A true CN1229693A (en) | 1999-09-29 |
Family
ID=5269963
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN99100358A Pending CN1229693A (en) | 1999-01-21 | 1999-01-21 | Sorbent for simultaneously eliminating sulfur dioxide and nitrogen dioxide |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1229693A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101695622A (en) * | 2001-04-04 | 2010-04-21 | 大阪瓦斯株式会社 | Desulfurization apparatus and desulfurization method |
-
1999
- 1999-01-21 CN CN99100358A patent/CN1229693A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101695622A (en) * | 2001-04-04 | 2010-04-21 | 大阪瓦斯株式会社 | Desulfurization apparatus and desulfurization method |
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