CN1153135A - Method and apparatus for producing hydrogen by pressure swing adsorption of ammonolysis gas using carbon molecular sieve - Google Patents
Method and apparatus for producing hydrogen by pressure swing adsorption of ammonolysis gas using carbon molecular sieve Download PDFInfo
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- CN1153135A CN1153135A CN95121802A CN95121802A CN1153135A CN 1153135 A CN1153135 A CN 1153135A CN 95121802 A CN95121802 A CN 95121802A CN 95121802 A CN95121802 A CN 95121802A CN 1153135 A CN1153135 A CN 1153135A
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- molecular sieve
- gas
- hydrogen
- adsorption tower
- carbon molecular
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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
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- Hydrogen, Water And Hydrids (AREA)
- Separation Of Gases By Adsorption (AREA)
Abstract
A process for producing hydrogen from ammonolytic gas by use of carbon molecular sieve by pressure swing adsorption features that the gas obtained after gasifying liquid ammonia and high-temp catalytic decomposing is directly sent to adsorption tower full of carbon molecular sieve adsorbent and under the control of program, pressure swing adsorption at 0.4-2 MPa and ordinary temp takes place to produce hydrogen. Its advantages are simple process, less investment and energy consumption, low cost, high hydrogen recovery (more than 80%), and high stability and reliability.
Description
The invention belongs to hydrogen the preparation method, particularly a kind of from the vent one's spleen method of hydrogen manufacturing of ammonia.
For raw material hydrogen manufacturing is the mixed gas that liquefied ammonia thermal degradation under catalyst action is obtained hydrogen and nitrogen, also contain a spot of ammonia and water with liquefied ammonia in this gas.General method is above-mentioned branch to be vented one's spleen after dewatering except that ammonia feed the pressure-swing absorber that is filled with zeolite molecular sieve again, and its sorbent material is depressed absorption of N adding
2, while output H
2, desorb N finds time during decompression
2, making adsorbent reactivation simultaneously, this periodic transformation absorption is to reach the purpose of Separation and Recovery hydrogen manufacturing.In aforesaid method, because the requirement harshness that the sorbent material zeolite molecular sieve is vented one's spleen to branch need dewater before transformation absorption, remove ammonia, so facility investment is bigger, and the rate of recovery of hydrogen is also lower.
The object of the present invention is to provide a kind of the need to branch the vent one's spleen ammonia handling and have a high hydrogen rate of recovery vent one's spleen hydrogen production process and device thereof.
Producing hydrogen by pressure swing adsorption of ammonolysis gas using carbon molecular sieve method of the present invention is the branch that obtains behind the liquefied ammonia pyrolytic decomposition to be vented one's spleen directly feed the adsorption tower that is filled with carbon molecular sieve adsorbent, at 0.4-2MPa, carries out transformation absorption hydrogen manufacturing by time variable control under the normal temperature.
Described carbonaceous molecular sieve is the hydrogen manufacturing carbonaceous molecular sieve.
Liquefied ammonia pyrolytic decomposition described in present method and transformation absorption all can adopt known technology to realize that the hydrogen manufacturing carbonaceous molecular sieve can have been bought from the market.
For the designed pressure-swing absorption apparatus of method of the present invention comprises 2-4 adsorption tower and corresponding connecting pipeline and on-off valve, it is characterized in that the top generating tube of each adsorption tower is communicated with to carry out all pressures of gas in the pressure-swing adsorption process with the bottom inlet pipe of another adsorption tower.
The present invention adopts carbonaceous molecular sieve to make sorbent material, because carbonaceous molecular sieve has hydrophobicity, the effect that micro-ammonia is had pressurization absorption decompression desorption, therefore the mixed gas after the liquefied ammonia thermolysis needn't pass through purifying treatment again and directly import adsorption tower and carry out transformation absorption hydrogen manufacturing, simplified technological process, investment is reduced, also reduced energy consumption simultaneously.Pressure-swing absorption apparatus of the present invention adopts the connection of adsorption tower uniqueness all to press, and the purity of product is improved and the yield increase.The hydrogen recovery rate of present method＞80%, equipment performance is reliable and stable.Especially needing the industry of hydrogen and department for fine chemistry industry hydrogenated products, electronic industry, scientific research, meteorology and other all is good hydrogen source selection.
Embodiment
Technological process and device are as accompanying drawing, and A, B are the adsorption tower that is filled with the changeable use of carbonaceous molecular sieve among the figure, and 1-10 is a magnetic valve.Liquefied ammonia gasifies and enters the A adsorption tower at the decomposition gas mixture that the high-temperature catalytic decomposition obtains through valve 1 and is pressurized to adsorptive pressure, open valve 7 aerogenesis, simultaneously the valve 4 of B adsorption tower is opened emptying and is opened valve 6 to the normal pressure and find time, make B tower internal adsorption agent regeneration fully, valve-off 6 and 1 and 7, opening valve 9 all presses A tower and B tower gas, driving valve 2 afterwards makes unstripped gas enter B tower to adsorptive pressure to open valve 8 aerogenesis, adsorption tower A emptying simultaneously, vacuumize and make adsorbent reactivation, after open valve 10 and B and A tower all pressed open valve 1 again and make A tower pressurising aerogenesis, the periodical change that goes round and begins again like this is to reach the purpose of continuous output hydrogen.Whole pressure-swing adsorption process is by the folding of sequence controller autocontrol valve, operating pressure 0.6MPa, and room temperature is divided the air input 16.20L/min that vents one's spleen, product tolerance 10.0L/min, the emptying and the tolerance 6.2L/min that finds time.
Following table is that unstripped gas and product gas are formed
Component gas H
2% N
2% NH
3Vent one's spleen 75.67 24.23 0.10＜-10 ℃ of product gas 99.89 0.11＜2PPm＜-10 ℃ of % moisture
Hydrogen recovery rate is 81.42%.
The data of listed gas composition all adopt percent by volume in the table of the present invention, are analyzed by gas-chromatography GC-7AG to obtain.The First Astronautic Research Institute for Measurement and Test is a wet test meter with instrument.
Claims (3)
1. producing hydrogen by pressure swing adsorption of ammonolysis gas using carbon molecular sieve method, it is characterized in that liquefied ammonia gasification and the branch that obtains after high-temperature catalytic decomposes vented one's spleen and directly feed the adsorption tower that is filled with carbon molecular sieve adsorbent, at 0.4-2MPa, carry out transformation absorption hydrogen manufacturing by time variable control under the normal temperature.
2. hydrogen production process as claimed in claim 1 is characterized in that described carbonaceous molecular sieve is the hydrogen manufacturing carbonaceous molecular sieve.
3. pressure-swing absorption apparatus according to the design of the described method of claim 1, comprise 2-4 adsorption tower and corresponding connecting pipeline and on-off valve, it is characterized in that the top generating tube of each adsorption tower is communicated with to carry out all pressures of gas in the pressure-swing adsorption process with another adsorption tower bottom inlet pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN95121802A CN1153135A (en) | 1995-12-28 | 1995-12-28 | Method and apparatus for producing hydrogen by pressure swing adsorption of ammonolysis gas using carbon molecular sieve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN95121802A CN1153135A (en) | 1995-12-28 | 1995-12-28 | Method and apparatus for producing hydrogen by pressure swing adsorption of ammonolysis gas using carbon molecular sieve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1153135A true CN1153135A (en) | 1997-07-02 |
Family
ID=5082491
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN95121802A Pending CN1153135A (en) | 1995-12-28 | 1995-12-28 | Method and apparatus for producing hydrogen by pressure swing adsorption of ammonolysis gas using carbon molecular sieve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1153135A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023090752A1 (en) * | 2021-11-17 | 2023-05-25 | 주식회사 포스코 | Method for preparing hydrogen from ammonia by using pressure swing adsorption |
-
1995
- 1995-12-28 CN CN95121802A patent/CN1153135A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023090752A1 (en) * | 2021-11-17 | 2023-05-25 | 주식회사 포스코 | Method for preparing hydrogen from ammonia by using pressure swing adsorption |
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| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| C01 | Deemed withdrawal of patent application (patent law 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |