CN105148901A - Acid-resistant denitration and doxin-removal catalyst and preparation method therefor - Google Patents
Acid-resistant denitration and doxin-removal catalyst and preparation method therefor Download PDFInfo
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- CN105148901A CN105148901A CN201510433803.0A CN201510433803A CN105148901A CN 105148901 A CN105148901 A CN 105148901A CN 201510433803 A CN201510433803 A CN 201510433803A CN 105148901 A CN105148901 A CN 105148901A
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Abstract
The invention discloses an acid-resistant denitration and doxin-removal catalyst which comprises the following components in percentage by mass: 20-30% of titanium dioxide, 0.6-1.5% of vanadium pentoxide, 5-7% of tungsten trioxide, 30-40% of glass fiber and the balance of resin. The resin is one or a mixture of two of phenolic resin, epoxy resin, melamino-formaldehyde, furan resin, polyimide resin, silicone resin, fluororesin, polyphenylene sulfide resin and polyether ether ketone resin. The invention further discloses a preparation method for the acid-resistant denitration and doxin-removal catalyst. The acid-resistant denitration and doxin-removal catalyst disclosed by the invention has the functions of denitrating and removing doxin and is large in contact area. The denitration efficiency can reach up to 95%, the ammonia escape rate is less than 2 ppm, and the catalyst is relatively good in acid resistance.
Description
Technical field
The present invention relates to a kind of acid-resisting denitration Tuo bioxin Catalysts and its preparation method, belong to denitrating flue gas Tuo bioxin catalyst prod and preparation method's technical field.
Background technology
Nitrogen oxide containing part in the flue gas that garbage burning factory is discharged is with bioxin.Nitrogen oxide is one of air pollutants, can form acid rain and photochemical fog; Bioxin, also known as dioxa glutinous rehmannia, be a kind of colorless and odorless, the liposoluble substance that toxicity is serious, accumulates in vivo, endangers seriously the mankind.
The best-of-breed technology removing nitrogen oxide is at present SCR denitration technology, effective denitration rate can reach more than 90%, and the denitration core of this technology is denitrating catalyst, can in the atmosphere of ammonia, nitrogen oxide is catalysed and reduced into nitrogen and water, the nucleus of catalyst is titanium dioxide and vanadic anhydride.
The state-of-the-art technology removing bioxin is SCO Tuo bioxin technology, refers under the effect of catalyst, and in flue gas, bioxin is oxidized is decomposed into hydrogen chloride, sulfur dioxide and water, and its nucleus is also titanium dioxide and vanadic anhydride.
The product hydrogen chloride, the sulfur dioxide that decompose bioxin are a kind of toxicants, can generate toxicant ammonium chloride and ammonium bisulfite, be attached to catalyst surface with ammonia gas react, slowly reduce the activity of catalyst, reduce the service life of catalyst.
In view of the similitude on two kinds of catalyst formulations, with the drawback of hydrogen chloride, sulfur dioxide in product, take off bioxin catalyst so exploitation one has antacid denitration tool is of great significance.
Summary of the invention
The present invention for the deficiency that prior art exists, provides a kind of acid-resisting denitration Tuo bioxin Catalysts and its preparation method, has denitration and Tuo bioxin performance simultaneously, and have good acid-resisting, meet actual operation requirements just.
For solving the problem, the technical solution used in the present invention is as follows:
A kind of acid-resisting denitration Tuo bioxin catalyst, comprises the component of following mass percent: titanium dioxide 20 ~ 30%, vanadic anhydride 0.6 ~ 1.5%, tungstic acid 5 ~ 7%, glass fibre 30 ~ 40%, surplus resin;
Described resin is one or more the mixture in phenolic resins, epoxy resin, melamine resin, furane resins, polyimide resin, silicone resin, fluororesin, polyphenylene sulfide, poly-diether ketone resin.
Specifically preferably, described a kind of acid-resisting denitration Tuo bioxin catalyst, comprises the component of following mass percent: titanium dioxide 25%, vanadic anhydride 1.2%, tungstic acid 6%, glass fibre 35%, surplus resin;
Described resin is one or more the mixture in phenolic resins, epoxy resin, melamine resin, furane resins, polyimide resin, silicone resin, fluororesin, polyphenylene sulfide, poly-diether ketone resin.
Further optimally, described a kind of acid-resisting denitration Tuo bioxin catalyst, it is prepared by following steps:
Step one, Titanium alkoxides to be dissolved in propyl alcohol or butanols, to obtain mixed solution;
After step 2, the described mixed solution described step one obtained are hydrolyzed, obtain the first suspension;
Add ammonium metavanadate solution in step 3, described first suspension that obtains to described step 2, after fully stirring, obtain the second suspension;
Step 4, under agitation, adds to water, glass fibre, resin together in described second suspension that described step 3 obtains, obtains uniform homogeneous blend;
The described uniform homogeneous blend that step 5, dry described step 4 obtain, dry temperature is 500 ~ 600 DEG C, and the dry time is 24 ~ 72 hours, obtains finished catalyst.
As technique scheme concrete preferably, in described step one: be dissolved into by Titanium alkoxides in isopropyl alcohol, obtain its mixed solution.
As technique scheme concrete preferably, in described step 4: the speed of stirring is 50 ~ 200 revs/min.
As technique scheme concrete preferably, in described step 5: the dry time is 55 hours.
Compared with prior art, implementation result of the present invention is as follows in the present invention:
A kind of acid-resisting denitration Tuo bioxin catalyst of the present invention, have denitration and Tuo bioxin function, contact area is large simultaneously, denitration efficiency is up to 95%, the escaping of ammonia rate is less than 2ppm, has good acid-resisting, relative to integral honeycomb formula catalyst conservation.
Detailed description of the invention
Below in conjunction with specific embodiments content of the present invention is described.
specific embodiment 1
A kind of acid-resisting denitration Tuo bioxin catalyst that the present embodiment provides, comprises the component of following mass percent: titanium dioxide 20%, vanadic anhydride 0.6%, tungstic acid 7%, glass fibre 40%, surplus resin;
Described resin is one or more the mixture in phenolic resins, epoxy resin, melamine resin, furane resins, polyimide resin, silicone resin, fluororesin, polyphenylene sulfide, poly-diether ketone resin.
The preparation method of a kind of acid-resisting denitration Tuo bioxin catalyst that the present embodiment provides, comprises the following steps:
Step one, Titanium alkoxides being dissolved in propyl alcohol or butanols, preferably for dissolving Titanium alkoxides, mixed solution can being obtained by isopropyl alcohol particularly;
After step 2, the described mixed solution described step one obtained are hydrolyzed, obtain the first suspension;
Add ammonium metavanadate solution in step 3, described first suspension that obtains to described step 2, after fully stirring, obtain the second suspension;
Step 4, under agitation, the speed stirred particularly can be 50 ~ 200 revs/min, preferably 100 revs/min, water, glass fibre, resin is added to together in described second suspension that described step 3 obtains, obtains uniform homogeneous blend;
The described uniform homogeneous blend that step 5, dry described step 4 obtain, dry temperature is 500 ~ 600 DEG C, and the dry time is 24 ~ 72 hours, can be decided to be 55 hours drying time particularly, obtain finished catalyst.
specific embodiment 2
A kind of acid-resisting denitration Tuo bioxin catalyst that the present embodiment provides, comprises the component of following mass percent: titanium dioxide 25%, vanadic anhydride 1.2%, tungstic acid 6%, glass fibre 35%, surplus resin;
Described resin is one or more the mixture in phenolic resins, epoxy resin, melamine resin, furane resins, polyimide resin, silicone resin, fluororesin, polyphenylene sulfide, poly-diether ketone resin.
The preparation method of a kind of acid-resisting denitration Tuo bioxin catalyst that the present embodiment provides, comprises the following steps:
Step one, Titanium alkoxides being dissolved in propyl alcohol or butanols, preferably for dissolving Titanium alkoxides, mixed solution can being obtained by isopropyl alcohol particularly;
After step 2, the described mixed solution described step one obtained are hydrolyzed, obtain the first suspension;
Add ammonium metavanadate solution in step 3, described first suspension that obtains to described step 2, after fully stirring, obtain the second suspension;
Step 4, under agitation, the speed stirred particularly can be 50 ~ 200 revs/min, preferably 100 revs/min, water, glass fibre, resin is added to together in described second suspension that described step 3 obtains, obtains uniform homogeneous blend;
The described uniform homogeneous blend that step 5, dry described step 4 obtain, dry temperature is 500 ~ 600 DEG C, and the dry time is 24 ~ 72 hours, can be decided to be 55 hours drying time particularly, obtain finished catalyst.
specific embodiment 3
A kind of acid-resisting denitration Tuo bioxin catalyst that the present embodiment provides, comprises the component of following mass percent: titanium dioxide 30%, vanadic anhydride 1.5%, tungstic acid 5%, glass fibre 30%, surplus resin;
Described resin is one or more the mixture in phenolic resins, epoxy resin, melamine resin, furane resins, polyimide resin, silicone resin, fluororesin, polyphenylene sulfide, poly-diether ketone resin.
The preparation method of a kind of acid-resisting denitration Tuo bioxin catalyst that the present embodiment provides, comprises the following steps:
Step one, Titanium alkoxides being dissolved in propyl alcohol or butanols, preferably for dissolving Titanium alkoxides, mixed solution can being obtained by isopropyl alcohol particularly;
After step 2, the described mixed solution described step one obtained are hydrolyzed, obtain the first suspension;
Add ammonium metavanadate solution in step 3, described first suspension that obtains to described step 2, after fully stirring, obtain the second suspension;
Step 4, under agitation, the speed stirred particularly can be 50 ~ 200 revs/min, preferably 100 revs/min, water, glass fibre, resin is added to together in described second suspension that described step 3 obtains, obtains uniform homogeneous blend;
The described uniform homogeneous blend that step 5, dry described step 4 obtain, dry temperature is 500 ~ 600 DEG C, and the dry time is 24 ~ 72 hours, can be decided to be 55 hours drying time particularly, obtain finished catalyst.
comparative examples
The present embodiment provides a kind of denitrating flue gas Tuo bioxin special cermacis catalyst, be made up of the raw material of following mass percent: titanium dioxide 60 ~ 90%, tungstic acid 3 ~ 9%, vanadic anhydride 0.1 ~ 2%, silica 1 ~ 5%, transition metal 0.1 ~ 2%, glass fibre 3 ~ 10%, surplus forming agent; Described forming agent is one or more in lactic acid, first class cellulose or polyethylene glycol; Described transition metal is one or more in palladium, barium, rhodium, cerium, lanthanum or ytterbium.
The preparation method of above-mentioned a kind of denitrating flue gas Tuo bioxin special cermacis catalyst comprises the following steps particularly:
Step one, mixing: by titanium dioxide, tungstic acid, vanadic anhydride, silica, metal mixed evenly after add forming agent, carry out mixing;
Step 2, filtration pre-extruded: material step one obtained, after old 12 ~ 36 hours, filters, and the material filtered out directly carries out pre-extruded after carrying out cooling processing;
Step 3, to extrude: the pre-extruded thing that step 2 is obtained, by mold integral extrusion molding;
Step 4, wet to cut: step 3 is obtained denitrating flue gas Tuo bioxin special cermacis catalyst and be cut into pieces;
Step 5, drying: special cermacis catalyst step 4 obtained carries out primary drying and redrying process;
Step 6, calcining: will calcine through twice dried catalytic agent for denitrating smoke.
performance test
Catalyst prepared by specific embodiment 1 to 3 and comparative examples is put into fixed bed quartz tube reactor, and reaction temperature is 200 ~ 500 DEG C, and air speed is under the condition of 40000/ hour, passes into simulated flue gas, and described simulated flue gas comprises following constituent:
The nitric oxide of 600ppm, the ammonia of 600ppm, mass percent is the sulfur dioxide of the oxygen of 3%, 100ppm, the hydrogen chloride of 100ppm and the nitrogen of surplus.
The catalytic denitration the performance test results of specific embodiment 1 to 3 and comparative examples is as shown in table 1 below:
Table 1:
| Sample | Initial denitration efficiency | Denitration efficiency after 24h | The escaping of ammonia rate |
| Specific embodiment 1 | 95% | 90% | ＜2 ppm |
| Specific embodiment 2 | 95% | 91% | ＜2 ppm |
| Specific embodiment 3 | 95% | 90% | ＜2 ppm |
| Comparative examples | 92% | 79% | 3～6 ppm |
According to the known a kind of acid-resisting denitration Tuo bioxin catalyst provided by the present invention of the test result of upper table 1, relative to a kind of denitrating flue gas Tuo bioxin special cermacis catalyst that comparative examples provides, there is preferably denitration efficiency, the escaping of ammonia rate and acid-resisting.
Above content is detailed description made for the present invention in conjunction with specific embodiments, can not assert that the present invention specifically implements to be only limitted to these explanations.For those skilled in the art, without departing from the inventive concept of the premise, some simple deduction or replace can also be made, all should be considered as belonging to the scope of protection of the invention.
Claims (7)
1. acid-resisting denitration takes off a bioxin catalyst, it is characterized in that, comprises the component of following mass percent: titanium dioxide 20 ~ 30%, vanadic anhydride 0.6 ~ 1.5%, tungstic acid 5 ~ 7%, glass fibre 30 ~ 40%, surplus resin;
Described resin is one or more the mixture in phenolic resins, epoxy resin, melamine resin, furane resins, polyimide resin, silicone resin, fluororesin, polyphenylene sulfide, poly-diether ketone resin.
2. a kind of acid-resisting denitration Tuo bioxin catalyst as claimed in claim 1, is characterized in that, comprise the component of following mass percent: titanium dioxide 25%, vanadic anhydride 1.2%, tungstic acid 6%, glass fibre 35%, surplus resin;
Described resin is one or more the mixture in phenolic resins, epoxy resin, melamine resin, furane resins, polyimide resin, silicone resin, fluororesin, polyphenylene sulfide, poly-diether ketone resin.
3. a kind of acid-resisting denitration Tuo bioxin catalyst as claimed in claim 1, it is characterized in that, it is prepared by following steps:
Step one, Titanium alkoxides to be dissolved in propyl alcohol or butanols, to obtain mixed solution;
After step 2, the described mixed solution described step one obtained are hydrolyzed, obtain the first suspension;
Add ammonium metavanadate solution in step 3, described first suspension that obtains to described step 2, after fully stirring, obtain the second suspension;
Step 4, under agitation, adds to water, glass fibre, resin together in described second suspension that described step 3 obtains, obtains uniform homogeneous blend;
The described uniform homogeneous blend that step 5, dry described step 4 obtain, dry temperature is 500 ~ 600 DEG C, and the dry time is 24 ~ 72 hours, obtains finished catalyst.
4. the preparation method of a kind of acid-resisting denitration Tuo bioxin catalyst as claimed in claim 1, is characterized in that, comprise the following steps:
Step one, Titanium alkoxides to be dissolved in propyl alcohol or butanols, to obtain mixed solution;
After step 2, the described mixed solution described step one obtained are hydrolyzed, obtain the first suspension;
Add ammonium metavanadate solution in step 3, described first suspension that obtains to described step 2, after fully stirring, obtain the second suspension;
Step 4, under agitation, adds to water, glass fibre, resin together in described second suspension that described step 3 obtains, obtains uniform homogeneous blend;
The described uniform homogeneous blend that step 5, dry described step 4 obtain, dry temperature is 500 ~ 600 DEG C, and the dry time is 24 ~ 72 hours, obtains finished catalyst.
5. the preparation method of a kind of acid-resisting denitration Tuo bioxin catalyst as claimed in claim 4, is characterized in that, in described step one: be dissolved into by Titanium alkoxides in isopropyl alcohol, obtains its mixed solution.
6. the preparation method of a kind of acid-resisting denitration Tuo bioxin catalyst as claimed in claim 4, is characterized in that, in described step 4: the speed of stirring is 50 ~ 200 revs/min.
7. the preparation method of a kind of acid-resisting denitration Tuo bioxin catalyst as claimed in claim 4, is characterized in that, in described step 5: the dry time is 55 hours.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106540693A (en) * | 2016-09-30 | 2017-03-29 | 浙江天蓝环保技术股份有限公司 | A kind of catalyst of low temperature Synergistic degradation bioxin and NOx and preparation method thereof |
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| CN102755898A (en) * | 2012-08-07 | 2012-10-31 | 江苏龙源催化剂有限公司 | Semiconductor control rectifier (SCR) denitration catalytic agent applicable to high ash-laden gas condition and preparation method thereof |
| CN102974340A (en) * | 2012-11-22 | 2013-03-20 | 中节能六合天融环保科技有限公司 | Preparation method of cellular V-Ti low-temperature smoke denitration catalyst |
| CN103495417A (en) * | 2013-09-30 | 2014-01-08 | 山东爱亿普环保科技有限公司 | Special ceramic catalyst for denitrification and dioxin removal of flue gas and preparation method thereof |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102755898A (en) * | 2012-08-07 | 2012-10-31 | 江苏龙源催化剂有限公司 | Semiconductor control rectifier (SCR) denitration catalytic agent applicable to high ash-laden gas condition and preparation method thereof |
| CN102974340A (en) * | 2012-11-22 | 2013-03-20 | 中节能六合天融环保科技有限公司 | Preparation method of cellular V-Ti low-temperature smoke denitration catalyst |
| CN103495417A (en) * | 2013-09-30 | 2014-01-08 | 山东爱亿普环保科技有限公司 | Special ceramic catalyst for denitrification and dioxin removal of flue gas and preparation method thereof |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106540693A (en) * | 2016-09-30 | 2017-03-29 | 浙江天蓝环保技术股份有限公司 | A kind of catalyst of low temperature Synergistic degradation bioxin and NOx and preparation method thereof |
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