CN101811016A - Method for preparing modified active carbon for hydrogen iodide catalytic decomposition through microwave treatment - Google Patents
Method for preparing modified active carbon for hydrogen iodide catalytic decomposition through microwave treatment Download PDFInfo
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- CN101811016A CN101811016A CN201010153619A CN201010153619A CN101811016A CN 101811016 A CN101811016 A CN 101811016A CN 201010153619 A CN201010153619 A CN 201010153619A CN 201010153619 A CN201010153619 A CN 201010153619A CN 101811016 A CN101811016 A CN 101811016A
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- Prior art keywords
- active carbon
- activated carbon
- carbon
- hydrogen iodide
- microwave treatment
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/36—Hydrogen production from non-carbon containing sources, e.g. by water electrolysis
Abstract
The invention relates to the field of catalyst technology, aiming at providing a method for preparing modified active carbon for hydrogen iodide catalytic decomposition through microwave treatment. The method comprises the following steps that: active carbon is put in a microwave oven and microwave treatment is conducted for 5-30min under the protection of protective gas by power of 100-800W and frequency of 2450MHz to obtain modified active carbon. Since the microwave modification treatment is conducted to the active carbon and the modified active carbon is directly used as catalyst for the hydrogen iodide catalytic decomposition, the invention has the advantages that the catalytic performance of the modified active carbon in the hydrogen iodide catalytic decomposition is obviously improved, the use of precious metal is avoided and the cost is reduced.
Description
Technical field
The invention belongs to catalysis technical field, be specifically related to the method that the microwave treatment preparation is used for the modified activated carbon of hydrogen iodide catalytic decomposition.
Background technology
Large-scale low-cost hydrogen manufacturing is the basis of development Hydrogen Energy economy, and traditional hydrogen production process all is to be raw material with the fossil fuel, along with the minimizing of fossil fuel, and people then seek with water as hydrogen feedstock.The decomposition of water has several methods such as electric decomposition, thermal decomposition and light decomposition.The electric disaggregated cost of water is too high, and the light branch dissociates practical in still far away, so the Thermochemical Decomposition of water has caused extensive attention.The direct heat of water is decomposed the high temperature that needs 2773K at least, and under such temperature, the membrane material of device materials and separation of hydrogen, oxygen all can't operate as normal.Can under relatively mild condition, realize the efficient decomposition of water by a series of chemical reaction? thermochemical cycles water decomposition hydrogen production process just is being based on above imagination, the chemical reaction that adopts the series reaction thing can be recycled, the final decomposition that realizes water, energy utilization efficiency is expected to reach more than 50%.
The research of thermochemical cycle for hydrogen production method begins starting from the sixties in last century, and its maximum characteristics are energy conversion efficiency height, required heat energy temperature is lower, reactive material is recycling, can realize large-scale continuous hydrogen manufacturing.2002, U.S. GA (General Atomics), Sandia National Laboratory and University of Kentucky unite screens 115 kinds of thermochemical cycles, in numerous circulations, heat chemistry sulphur iodine circulation (sulfur-iodine thermochemical cycle, be abbreviated as SI or IS) owing to its reactions steps simplification, reaction condition gentleness, cycle efficieny height, finally selected this circulation is as the Ideal Cycle of hydrogen manufacturing.In recent years obtain in the U.S., Japan and Korea S and Europe paying much attention to, become the new academic frontier and the hot issue of current this area in the world research, various countries drop into a large amount of human and material resources one after another and competitively carry out correlative study.Therefore, the basic research of carrying out heat chemistry sulphur iodine circulation hydrogen manufacturing not only has very great scientific meaning, and have widely, the application background of reality.
The circulation of heat chemistry sulphur iodine is made up of three chemical reactions:
I
2+SO
2+2H
2O→2HI+H
2SO
4(20～120℃) (1)
2HI→I
2+H
2(300～500℃)(2)
H
2SO
4→SO
2+H
2O+0.5O
2(800～850℃) (3)
Reaction (2) is the decomposition of hydrogen iodide, generates H under 300-500 ℃ of temperature
2And I
2, be the committed step that the circulation of heat chemistry sulphur iodine produces hydrogen.Consider the ability to bear and the energy consumption problem of equipment and materials, the temperature that hydrogen iodide gas decomposes should be too not high, but the speed of homogeneous chemical reaction is limited under the middle low temperature, therefore, generally uses catalyst to accelerate the speed that hydrogen iodide gas decomposes.In the early stage research of hydrogen iodide catalytic decomposition, noble metals such as platinum, gold are the maximum catalyst of research.Domestic Tsing-Hua University patent of invention 200710121484.5 (a kind of preparation method of catalyst for catalytic decomposition of hydrogen iodide, on March 12nd, 2008) proposes noble metal is loaded on the carrier, and wherein carrier can be a carbon carrier.But noble metal costs an arm and a leg, therefore study new cheap and also efficiently catalyst become the key scientific problems of heat chemistry water decomposition sulphur iodine circulation hydrogen manufacturing.Britain patent of invention British Talent796,049 (Process for the recovery of iodine from hydrogen iodide, on June 4th, 1958) provide the technology that reclaims elemental iodine in a kind of hydrogen iodide, adopted the catalyst of indefinite form carbon as the hydrogen iodide catalytic decomposition.But the commercial active carbon of directly buying may be because various factors causes catalytic performance not very good.
Invention Inner holds
The technical problem to be solved in the present invention is, the hydrogen iodide that overcomes present existence decompose with noble metal catalyst cost an arm and a leg, the non-precious metal catalyst activity is generally bad, the shortcoming of part loss, prepared in batches complex process, provides a kind of microwave treatment preparation to be used for the method for the modified activated carbon of hydrogen iodide catalytic decomposition.
Decompose with in the catalyst at traditional hydrogen iodide, active carbon just comes carried noble metal as the carrier of catalyst.Decompose the problem that costs an arm and a leg that exists with catalyst in order to solve traditional hydrogen iodide, the present invention directly with active carbon as catalyst for catalytic decomposition of hydrogen iodide, and adopt modification to handle to improve catalytic performance and heat endurance.
For solving the problems of the technologies described above; the invention provides the method that a kind of microwave treatment preparation is used for the modified activated carbon of hydrogen iodide catalytic decomposition; comprise step: active carbon is placed micro-wave oven; under the protection of protection gas; carry out microwave treatment 5～30min with the power of 100～800W, the frequency of 2450MHZ, promptly get modified activated carbon.
Among the present invention, described protection gas is N
2, H
2Or among He, the Ar any one.
Among the present invention, described active carbon is any one in the following active carbon:
Wood activated charcoal: cocoanut active charcoal, apricot shell active carbon, activated carbon from bamboo or wooden burgy; The mineral raw material active carbon: coal is that raw material, oil and coal are that raw material or PETROLEUM PROCESSING product are the active carbon that raw material is made; The active carbon that scrap rubber or waste plastics are made.
Among the present invention, described active carbon obtains by any one method among the following preparation method: chemical method, physics method, physical-chemical combined method or chemistry-physical set are legal.
Among the present invention, described active carbon is any one in powdered activated carbon, granular active carbon, NACF, Alveolate activated carbon capable, the active carbon slab.
Compared with prior art, the invention has the beneficial effects as follows:
The present invention carries out microwave modification to active carbon and handles, and directly with modified activated carbon as the catalyst in the hydrogen iodide catalytic decomposition, can significantly improve its catalytic performance in the hydrogen iodide catalytic decomposition, avoided the use of noble metal, reduce cost.
The specific embodiment
Below in conjunction with the specific embodiment the present invention is described in further detail:
Embodiment 1:
Wooden phosphoric acid method active carbon is placed micro-wave oven, at N
2Protection under, carry out microwave treatment 5min with the power of 100W, the frequency of 2450MHZ, promptly get modified activated carbon.
Embodiment 2:
Cocoanut active charcoal is placed micro-wave oven, under the protection of He, carry out microwave treatment 30min, promptly get modified activated carbon with the power of 800W, the frequency of 2450MHZ.
Embodiment 3:
Activated carbon from bamboo is placed micro-wave oven, at H
2Protection under, carry out microwave treatment 15min with the power of 400W, the frequency of 2450MHZ, promptly get modified activated carbon.
In the previous embodiment, protection gas can also be selected rare gas such as Ar for use; Active carbon can be selected following active carbon for use: the active carbon that wood activated charcoal (comprising cocoanut active charcoal, apricot shell active carbon, activated carbon from bamboo or wooden burgy etc.), mineral raw material active carbon (comprising that coal or oil and coal or PETROLEUM PROCESSING product are the active carbon that raw material is made), scrap rubber or waste plastics are made.Described active carbon can come by chemical method, physics method, physical-chemical combined method or chemistry-physical combination method preparation.Described active carbon can be powdered activated carbon, granular active carbon, NACF, Alveolate activated carbon capable or active carbon slab.
The present invention has carried out the performance test and the contrast of hydrogen iodide catalytic decomposition to active carbon and the obtained modified activated carbon of embodiment, and experimental program and result are as follows:
Test platform of the present invention is that hydrogen iodide decomposes experimental system.Used hydroiodic acid is at the uniform velocity imported by peristaltic pump, hydroiodic acid heats in the hydrogen iodide vaporising device, the hydrogen iodide steam that evaporates enters quartz tube reactor, simultaneously flow velocity is that the nitrogen of 60ml/min also enters in the quartz tube reactor enter conversion zone after the hydrogen iodide vapor mixing, reactor is heated by tube furnace, after reacted gas process condenser and the Drexel bottle is the mixed gas of hydrogen and nitrogen, measures density of hydrogen by hydrogen analyzer then, calculates the hydrogen iodide resolution ratio.Test sees Table 1 with comparing result.
Table 1: embodiment test and comparing result
As can be seen from Table 1, with active carbon directly as catalyst for catalytic decomposition of hydrogen iodide, the resolution ratio of hydrogen iodide resolution ratio during than catalyst useless improves a lot, after activated-carbon catalyst adopts microwave modification method to handle, also can significantly improve its catalytic performance, avoided the use of noble metal, reduced cost.
At last, it is also to be noted that what more than enumerate only is specific embodiments of the invention.Obviously, the invention is not restricted to above embodiment, many distortion can also be arranged.All distortion that those of ordinary skill in the art can directly derive or associate from content disclosed by the invention all should be thought protection scope of the present invention.
Claims (5)
1. microwave treatment preparation is used for the method for the modified activated carbon of hydrogen iodide catalytic decomposition, comprises step:
Active carbon is placed micro-wave oven, under the protection of protection gas, carry out microwave treatment 5～30min, promptly get modified activated carbon with the power of 100～800W, the frequency of 2450MHZ.
2. the method for preparing modified activated carbon according to claim 1 is characterized in that, described protection gas is N
2, H
2, among He or the Ar any one.
3. the method for preparing modified activated carbon according to claim 1 is characterized in that, described active carbon is any one in the following active carbon:
Wood activated charcoal: cocoanut active charcoal, apricot shell active carbon, activated carbon from bamboo or wooden burgy;
The mineral raw material active carbon: coal is that raw material, oil and coal are that raw material or PETROLEUM PROCESSING product are the active carbon that raw material is made;
The active carbon that scrap rubber or waste plastics are made.
4. the method for preparing modified activated carbon according to claim 1 is characterized in that, described active carbon is to obtain by any one method among the following preparation method: chemical method, physics method, physical-chemical combined method or chemistry-physical set are legal.
5. the method for preparing modified activated carbon according to claim 1 is characterized in that, described active carbon is any one in powdered activated carbon, granular active carbon, NACF, Alveolate activated carbon capable or the active carbon slab.
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| CN201010153619A CN101811016A (en) | 2010-04-22 | 2010-04-22 | Method for preparing modified active carbon for hydrogen iodide catalytic decomposition through microwave treatment |
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| CN201010153619A CN101811016A (en) | 2010-04-22 | 2010-04-22 | Method for preparing modified active carbon for hydrogen iodide catalytic decomposition through microwave treatment |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104014307A (en) * | 2014-05-30 | 2014-09-03 | 石河子大学 | Microwave heating modifying method capable of enhancing basic groups on surface of active carbon |
| CN105905897A (en) * | 2015-07-01 | 2016-08-31 | 洛阳名力科技开发有限公司 | Preparation method of active carbon for waste water treatment |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101269345A (en) * | 2008-05-08 | 2008-09-24 | 郴州高鑫铂业有限公司 | Oxidation treatment method for carrier carbon surface |
| CN101302668A (en) * | 2008-05-28 | 2008-11-12 | 哈尔滨工业大学 | Modifying method of active carbon fiber |
-
2010
- 2010-04-22 CN CN201010153619A patent/CN101811016A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101269345A (en) * | 2008-05-08 | 2008-09-24 | 郴州高鑫铂业有限公司 | Oxidation treatment method for carrier carbon surface |
| CN101302668A (en) * | 2008-05-28 | 2008-11-12 | 哈尔滨工业大学 | Modifying method of active carbon fiber |
Non-Patent Citations (2)
| Title |
|---|
| 《中国博士学位论文全文数据库工程科技Ⅰ辑》 20091115 邹学权 水处理用活性炭的微波改性与再生 第26-35页 1-5 , 2 * |
| 《科学技术与工程》 20081231 魏起华 等 微波加热在活性炭制备及改性中应用研究进展 第6296-6301页 1-5 第8卷, 第23期 2 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104014307A (en) * | 2014-05-30 | 2014-09-03 | 石河子大学 | Microwave heating modifying method capable of enhancing basic groups on surface of active carbon |
| CN105905897A (en) * | 2015-07-01 | 2016-08-31 | 洛阳名力科技开发有限公司 | Preparation method of active carbon for waste water treatment |
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Application publication date: 20100825 |