CN101804341A - Method for preparing modified activated carbon for catalytic decomposition of hydrogen iodide through high-temperature heat treatment - Google Patents
Method for preparing modified activated carbon for catalytic decomposition of hydrogen iodide through high-temperature heat treatment Download PDFInfo
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- CN101804341A CN101804341A CN201010153615A CN201010153615A CN101804341A CN 101804341 A CN101804341 A CN 101804341A CN 201010153615 A CN201010153615 A CN 201010153615A CN 201010153615 A CN201010153615 A CN 201010153615A CN 101804341 A CN101804341 A CN 101804341A
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- activated carbon
- active carbon
- modified activated
- hydrogen iodide
- carbon
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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 technical field of catalysis and aims to provide a method for preparing modified activated carbon for the catalytic decomposition of hydrogen iodide through high-temperature heat treatment, comprising the following steps of: placing activated carbon in an atmosphere furnace, carrying out heat preservation for 1-3 h after heating to 400-1500 DEG C under the protection of protective air, and then cooling to the normal temperature along with the furnace to obtain the modified activated carbon. The invention modifies the activated carbon, directly uses the modified activated carbon obtained by high-temperature heat treatment as a catalyst in the catalytic decomposition of the hydrogen iodide to obviously improve the catalytic performance of the modified activated carbon in the catalytic decomposition of the hydrogen iodide, and avoids the user of precious metal so as to reduce cost.
Description
Technical field
The invention belongs to catalysis technical field, be specifically related to the method that the high-temperature heat 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 high-temperature heat 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 decomposes active carbon and use catalyst as hydrogen iodide, and adopts the high-temperature heat treatment modification with raising catalytic performance and heat endurance.
For solving the problems of the technologies described above; high-temperature heat treatment preparation provided by the invention is used for the method for the modified activated carbon of hydrogen iodide catalytic decomposition; comprise step: active carbon is placed atmosphere furnace; after being heated to 400～1500 ℃ under the protection of protection gas; insulation 1～3h; cool to normal temperature with the furnace, promptly get modified activated carbon.
Among the present invention, described protection gas can be N
2, H
2Or He, Ar.
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 or the active carbon slab.
Compared with prior art, the invention has the beneficial effects as follows:
The present invention carries out modification to active carbon and handles, and directly with the high-temperature heat treatment 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 high-temperature atmosphere furnace, at N
2Be warming up to 400 ℃ under the protection, behind the insulation 1h, cool to normal temperature with the furnace, promptly obtain modified activated carbon.
Embodiment 2:
Coal mass active carbon is placed high-temperature atmosphere furnace, at H
2(described protection gas can be N
2, H
2Or rare gas such as He, Ar) be warming up to 1500 ℃ under the protection, behind the insulation 3h, cool to normal temperature with the furnace, promptly obtain modified activated carbon.
Embodiment 3:
The active carbon that waste plastics is made places high-temperature atmosphere furnace, is warming up to 700 ℃ under the Ar gas shiled, behind the insulation 2h, cools to normal temperature with the furnace, promptly obtains modified activated carbon.
In the previous embodiment, protection gas can also be selected rare gas such as He 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 the high-temperature heat treatment method of modifying 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. high-temperature heat treatment preparation is used for the method for the modified activated carbon of hydrogen iodide catalytic decomposition, comprises step:
Active carbon is placed atmosphere furnace, and after being heated to 400～1500 ℃ under the protection of protection gas, insulation 1～3h cools to normal temperature with the furnace, promptly gets modified activated carbon.
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.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201010153615A CN101804341A (en) | 2010-04-22 | 2010-04-22 | Method for preparing modified activated carbon for catalytic decomposition of hydrogen iodide through high-temperature heat treatment |
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| CN201010153615A CN101804341A (en) | 2010-04-22 | 2010-04-22 | Method for preparing modified activated carbon for catalytic decomposition of hydrogen iodide through high-temperature heat treatment |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102139205A (en) * | 2011-01-26 | 2011-08-03 | 福建省鑫森炭业股份有限公司 | Method for preparing special carbon oxidation catalyst for glyphosate |
| CN110605094A (en) * | 2018-06-15 | 2019-12-24 | 清华大学 | Modification method for making sanitary and safe soaking pH of activated carbon fiber water purification material reach standard |
-
2010
- 2010-04-22 CN CN201010153615A patent/CN101804341A/en active Pending
Non-Patent Citations (6)
| Title |
|---|
| 《Carbon》 19981231 M.A.DE LA CASA-LILLO et al. MOLECULAR SIEVE PROPERTIES OF GENERAL-PURPOSE 1353-1360 权利要求1-5 第36卷, 第9期 2 * |
| 《Chemical Engineering Science》 19991231 Tsair-Wang Chung et al Increase in the amount of adsorption on modiÞed activated carbon byusing neutron ßux irradiation 1803-1809 权利要求1-5 第54卷, 2 * |
| 《Fuel》 20011231 Isao Mochida et al catalytic acticity of pitch-based actived carbon fiber of large surface area heat-treated at high temperature and regeneration for NO-NH3 reaction at ambient temperatures 2227-2233 权利要求1-5 第80卷, 2 * |
| 《动力工程》 20080831 周劲松 等 N2气氛下活性炭的汞吸附性能 625-628 权利要求1-5 第28卷, 第4期 2 * |
| 《新型炭材料》 20040331 乔志军 等 高温热处理对活性炭纤维微孔及表面性能的影响 53-56页 权利要求1-5 第19卷, 第1期 2 * |
| 《环境科学与技术》 20080930 莫德清 等 活性碳纤维表面改性及其在气体净化中的应用 77-98 权利要求1-5 第31卷, 第9期 2 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102139205A (en) * | 2011-01-26 | 2011-08-03 | 福建省鑫森炭业股份有限公司 | Method for preparing special carbon oxidation catalyst for glyphosate |
| CN102139205B (en) * | 2011-01-26 | 2015-10-28 | 福建省鑫森炭业股份有限公司 | The preparation method of the special char combustion catalyst of glyphosate |
| CN110605094A (en) * | 2018-06-15 | 2019-12-24 | 清华大学 | Modification method for making sanitary and safe soaking pH of activated carbon fiber water purification material reach standard |
| CN110605094B (en) * | 2018-06-15 | 2021-06-18 | 清华大学 | Modification method for making sanitary and safe soaking pH of activated carbon fiber water purification material reach standard |
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Application publication date: 20100818 |