WO2008056579A1 - Procédé de séparation de l'hydrogène gazeux et appareil de séparation - Google Patents
Procédé de séparation de l'hydrogène gazeux et appareil de séparation Download PDFInfo
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- WO2008056579A1 WO2008056579A1 PCT/JP2007/071198 JP2007071198W WO2008056579A1 WO 2008056579 A1 WO2008056579 A1 WO 2008056579A1 JP 2007071198 W JP2007071198 W JP 2007071198W WO 2008056579 A1 WO2008056579 A1 WO 2008056579A1
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- C01B3/02—Production of hydrogen or of gaseous mixtures containing a substantial proportion of hydrogen
- C01B3/32—Production of hydrogen or of gaseous mixtures containing a substantial proportion of hydrogen by reaction of gaseous or liquid organic compounds with gasifying agents, e.g. water, carbon dioxide, air
- C01B3/34—Production of hydrogen or of gaseous mixtures containing a substantial proportion of hydrogen by reaction of gaseous or liquid organic compounds with gasifying agents, e.g. water, carbon dioxide, air by reaction of hydrocarbons with gasifying agents
- C01B3/38—Production of hydrogen or of gaseous mixtures containing a substantial proportion of hydrogen by reaction of gaseous or liquid organic compounds with gasifying agents, e.g. water, carbon dioxide, air by reaction of hydrocarbons with gasifying agents using catalysts
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- B01D53/04—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography with stationary adsorbents
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- C01B3/50—Separation of hydrogen or hydrogen containing gases from gaseous mixtures, e.g. purification
- C01B3/56—Separation of hydrogen or hydrogen containing gases from gaseous mixtures, e.g. purification by contacting with solids; Regeneration of used solids
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- B01D2259/40—Further details for adsorption processes and devices
- B01D2259/40011—Methods relating to the process cycle in pressure or temperature swing adsorption
- B01D2259/40058—Number of sequence steps, including sub-steps, per cycle
- B01D2259/40071—Nine
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- B01D2259/414—Further details for adsorption processes and devices using different types of adsorbents
- B01D2259/4141—Further details for adsorption processes and devices using different types of adsorbents within a single bed
- B01D2259/4145—Further details for adsorption processes and devices using different types of adsorbents within a single bed arranged in series
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- C01B2203/02—Processes for making hydrogen or synthesis gas
- C01B2203/0205—Processes for making hydrogen or synthesis gas containing a reforming step
- C01B2203/0227—Processes for making hydrogen or synthesis gas containing a reforming step containing a catalytic reforming step
- C01B2203/0244—Processes for making hydrogen or synthesis gas containing a reforming step containing a catalytic reforming step the reforming step being an autothermal reforming step, e.g. secondary reforming processes
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- C01B2203/0465—Composition of the impurity
- C01B2203/048—Composition of the impurity the impurity being an organic compound
Definitions
- the present invention relates to a method and an apparatus for separating hydrogen gas by removing unnecessary gas from a mixed gas containing hydrogen as a main component using a pressure fluctuation adsorption method (PSA method).
- PSA method pressure fluctuation adsorption method
- Hydrogen as an industrial gas (high hydrogen gas concentration! /, Product gas) is used for, for example, glass melting, semiconductor manufacturing, optical fiber manufacturing, metal heat treatment, fusing, oil and fat curing, and the like.
- high hydrogen gas concentration! /, Product gas is used for, for example, glass melting, semiconductor manufacturing, optical fiber manufacturing, metal heat treatment, fusing, oil and fat curing, and the like.
- Practical methods for industrially producing hydrogen include, for example, reforming hydrocarbon-based raw materials such as methanol and natural gas to produce a mixed gas mainly composed of hydrogen, and pressure fluctuation
- PSA method adsorption method
- unnecessary gases other than hydrogen in this mixed gas are removed to derive a product gas with a high hydrogen gas concentration.
- the reforming method of the hydrocarbon-based raw material include a steam reforming method and a partial oxidation reforming method.
- a plurality of adsorption towers filled with an adsorbent that preferentially adsorbs a predetermined unnecessary gas is provided, and each adsorption tower repeats a cycle including at least an adsorption process and a desorption process.
- the mixed gas is introduced into the adsorption tower, the unnecessary gas in the mixed gas is adsorbed by the adsorbent, and high-purity hydrogen gas is derived.
- the desorption step an unnecessary gas is desorbed from the adsorbent, and a desorption gas including the unnecessary gas and a gas remaining in the adsorption tower is led out from the adsorption tower.
- various improvements have been made from the viewpoint of the purity and recovery rate of the obtained hydrogen gas.
- each adsorption tower may repeat a cycle including an adsorption step, a depressurization step, a desorption step, a washing step, and a pressurization step (see, for example, Patent Document 1 below).
- an adsorption step is performed.
- Residual gas is introduced into another adsorption tower under low pressure after the desorption process is completed, and one adsorption tower is subjected to a decompression process (first and second decompression processes), and at the same time, the other adsorption tower is washed.
- Steps and boosting step are performed.
- the decompression process is performed in two stages, a first decompression process and a second decompression process.
- residual gas in the adsorption tower that is subject to decompression (hydrogen gas concentration is close to that of the product gas) is used. For example, cleaning is performed using only the product gas.
- the recovery rate of hydrogen gas is improved. Also, in the pressurization process (first pressurization process) that is paired with the second decompression process, the residual gas in the adsorption tower that is subject to depressurization (the hydrogen gas concentration is still close to the product gas) is recovered in the adsorption tower that is subject to pressurization As a result, the hydrogen gas recovery rate is also improved.
- the pressurization process first pressurization process
- the hydrogen gas concentration is still close to the product gas
- the hydrogen gas recovery rate is also improved.
- Patent Document 1 Japanese Patent Application Laid-Open No. 2004-66125
- the autothermal reforming method combines the steam reforming reaction and the partial oxidation reforming reaction to balance the heat absorption amount due to the steam reforming reaction and the heat generation amount due to the partial oxidation reforming reaction, eliminating the need for external heating.
- This is a technique for performing a heat independent type reforming reaction.
- This photothermal reforming method has the advantage that the structure of the reforming reactor that causes the reforming reaction is simplified.
- purified oxygen-enriched gas or air is generally employed as oxygen added to cause the partial oxidation reforming reaction.
- inert nitrogen argon is mixed in addition to oxygen.
- the present invention has been conceived under such circumstances, and is based on a PSA method from a mixed gas obtained by an autothermal reforming reaction of a hydrocarbon-based raw material to which air has been added.
- the issue is to increase the recovery rate of hydrogen gas while maintaining a high hydrogen gas concentration in the product gas obtained.
- the method for separating hydrogen gas provided by the first aspect of the present invention is based on a mixed gas mainly composed of hydrogen obtained by autothermal reforming of a hydrocarbon-based raw material to which air is added.
- the mixed gas is introduced into the adsorption tower by the pressure fluctuation adsorption gas separation method using a plurality of adsorption towers filled with beg adsorbents for separating hydrogen gas, and unnecessary gas in the mixed gas is removed.
- the cycle including the desorption step of deriving the desorption gas containing the adsorption tower force is repeated.
- the adsorbent is located on the upstream side in the mixed gas flow direction in the adsorption tower and is located on the downstream side in the flow direction with the activated carbon-based first adsorbent having a filling ratio of 10 to 50%.
- a zeolite-based second adsorbent having a filling ratio of 90 to 50%.
- the inventors of the present invention diligently studied to solve the above-mentioned problems, and paid attention to the possibility that the type, arrangement, and packing ratio of the adsorbent packed in the adsorption tower affect the hydrogen gas recovery rate.
- the inventors have found that when the adsorbent satisfies a predetermined condition, the hydrogen gas concentration in the product gas is kept high and the hydrogen gas recovery rate is increased, and the present invention has been completed.
- an activated carbon type first adsorbent
- the activated carbon-based adsorbent is excellent in adsorption and removal of carbon dioxide, argon, and nitrogen in the high concentration region, while the zeolite adsorbent is carbon monoxide, and Excellent adsorption and removal ability of nitrogen in low concentration region.
- the mixed gas to be separated is obtained by an autothermal reforming reaction of a hydrocarbon-based raw material to which air is added, and the mixed gas contains by-products. Carbon dioxide, and unreacted nitrogen are contained in a relatively high proportion.
- the total concentration of argon and nitrogen in the product gas is lOOppm or less.
- the first adsorbent has an average pore diameter of 1.5 to 2. Onm.
- the residual gas in the tower is exhausted and introduced into another adsorption tower until the pressure in the adsorption tower having undergone the adsorption step reaches the first intermediate pressure.
- the first depressurization step, and the gas in the tower is further discharged until the pressure in the adsorption tower that has undergone the first depressurization step becomes a second intermediate pressure that is lower than the first intermediate pressure.
- a second pressure reducing step to be introduced, and a pressure difference between the adsorption pressure in the adsorption step and the first intermediate pressure is 140 to 280 KPa.
- the filling ratio of the first adsorbent is 20 to 40%, and the filling ratio of the second adsorbent is 80 to 60%.
- the adsorption pressure in the adsorption step is 0.5 to 4. OMPa.
- the hydrocarbon-based raw material is composed of a gas or a liquid selected from the group consisting of city gas mainly composed of natural gas, propane, butane, gasoline, naphtha, kerosene, methanol, ethanol, and dimethyl ether.
- city gas mainly composed of natural gas, propane, butane, gasoline, naphtha, kerosene, methanol, ethanol, and dimethyl ether.
- the hydrogen gas separation device provided by the second aspect of the present invention is a mixture mainly containing hydrogen obtained by autothermal reforming of a hydrocarbon-based raw material to which air has been added.
- the mixed gas is introduced into the adsorption tower by a pressure fluctuation adsorption gas separation method using a plurality of adsorption towers filled with beg adsorbent for separating hydrogen gas from the combined gas.
- An unnecessary gas is adsorbed on the adsorbent, a product gas having a high hydrogen gas concentration is led out from the adsorption tower, and the unnecessary gas is desorbed from the adsorbent to remain in the adsorption tower and the unnecessary gas.
- the desorption gas containing is derived from the adsorption tower.
- the adsorbent is located on the upstream side in the mixed gas flow direction in the adsorption tower and is located on the downstream side in the flow direction with an activated carbon-based first adsorbent having a filling ratio of 10 to 50%. And a zeolite-based second adsorbent having a filling ratio of 90 to 50%. According to such a hydrogen gas separation device, the method according to the first aspect of the present invention can be realized, and therefore, the same advantages as those described above with respect to the first aspect of the present invention can be obtained. Can do.
- FIG. 1 is a schematic configuration diagram of a three-column PSA gas separation device for realizing a hydrogen gas separation method according to the present invention.
- FIG. 2 is a gas flow diagram corresponding to each step of the hydrogen gas separation method according to the present invention.
- FIG. 3 is a graph showing adsorption isotherms of activated carbon and zeolite for carbon dioxide.
- FIG. 4 is a graph showing adsorption isotherms of activated carbon and zeolite for methane.
- FIG. 5 is a graph showing adsorption isotherms for activated carbon and zeolite in carbon monoxide.
- FIG. 6 is a graph showing adsorption isotherms of activated carbon and zeolite for argon.
- FIG. 7 is a graph showing adsorption isotherms of activated carbon and zeolite for nitrogen.
- FIG. 8 is a graph showing adsorption isotherms of activated carbon and zeolite for nitrogen.
- a method for separating hydrogen gas according to the present invention includes, for example, a PSA gas separation device X shown in FIG. Can be used.
- the PSA gas separation device X shown in this figure consists of three adsorption towers A, B, C, mixed gas pipe 1, product gas pipe 2, tower gas extraction pipe 3, gas backflow pipe 4, product gas A return pipe 5 and a desorption gas pipe 6 are provided.
- Adsorption towers A, B, and C are filled with a predetermined adsorbent.
- the adsorbent includes an activated carbon-based first adsorbent D positioned upstream of the mixed gas flow direction in each adsorption tower (corresponding to the lower side of the adsorption tower in FIG. 1), and downstream of the flow direction. And a zeolite-based second adsorbent E located in the upper part of the adsorption tower in FIG.
- activated carbon such as coconut shell or coal can be used as the first adsorbent D.
- the average pore diameter is 1.5 to 2. Onm, preferably 1.7 to 1.8 nm. Those are preferably used.
- the second adsorbent E it is possible to adopt Ca-A type zeolite molecular sieve, Ca-X type zeolite molecular sieve, Li X type zeolite molecular sieve, etc. Is preferably used.
- the first and second adsorbents D and E are adjusted so as to have a predetermined filling ratio (volume ratio) with respect to the entire capacity of the adsorbent. Specifically, the filling ratio of the first adsorbent D is 10 to 50%, and the filling ratio of the second adsorbent E is 90 to 50%.
- each of the pipes 1 to 6 is provided with automatic valves a to q, and the gas extraction pipe 3, the gas backflow pipe 4 and the product gas return pipe 5 are provided with flow control valves 7 and 8, respectively.
- each adsorption tower A, B, C is selected by selecting the open / close state of each automatic valve a to q.
- an adsorption process, a decompression process (first decompression process and second decompression process), a desorption process, a cleaning process, and a boosting process (first boosting process and second boosting process) are performed.
- predetermined steps are performed in parallel in the adsorption towers A, B, and C.
- the gas flow of the PSA gas separation device X at each step is shown schematically in Fig. 2 (a) to (i).
- step 1 the adsorption process is performed in adsorption tower ⁇ , the cleaning process is performed in adsorption tower B, and the first decompression process is performed in adsorption tower C, as shown in Fig. 2 (a).
- Gas flow state the adsorption process is performed in adsorption tower ⁇ , the cleaning process is performed in adsorption tower B, and the first decompression process is performed in adsorption tower C, as shown in Fig. 2 (a).
- the adsorption tower A includes a mixed gas pipe 1 and an automatic valve a.
- the mixed gas is introduced through
- the mixed gas is obtained by an autothermal reforming reaction of a hydrocarbon-based raw material to which air is added, contains hydrogen as a main component, and relatively high concentrations of carbon dioxide and nitrogen as unnecessary gases. Contain relatively low concentrations of carbon monoxide and small amounts of unreacted hydrocarbons and argon.
- the hydrocarbon-based raw materials include, for example, city gas mainly composed of natural gas, propane, butane, gasoline, naphtha, kerosene, alcohols such as methanol and ethanol, and dimethyl ether! /
- the mixed gas passes through the tower maintained at a predetermined high pressure state.
- the first adsorbent D mainly absorbs hydrocarbons such as carbon dioxide, nitrogen, methane and methanol
- the second adsorbent E mainly absorbs carbon monoxide and residuals! Adsorbed, product gas is discharged out of the tower with high hydrogen gas concentration.
- Product gas is recovered through automatic valve i and product gas piping 2.
- the adsorption tower B is discharged from the adsorption tower C via an automatic valve n, a gas extraction pipe 3 in the tower, a flow rate adjustment valve 7, an automatic valve p, a gas backflow pipe 4, and an automatic valve j.
- the gas inside the tower (cleaning gas) is introduced.
- Adsorption tower C has already undergone the adsorption process, whereas adsorption tower B has previously undergone the desorption process (see step 9 described later in FIG. 2 (i)).
- the pressure is higher than that in adsorption tower B.
- the pressure in the adsorption tower C is reduced to the first intermediate pressure, and the gas remaining in the adsorption tower B is discharged.
- the This gas is discharged through the automatic valve d and the desorption gas pipe 6.
- step 2 an adsorption process is performed in adsorption tower A, a first pressure increasing process is performed in adsorption tower B, and a second pressure reducing process is performed in adsorption tower C.
- the gas flow as shown in Fig. 2 (b) is performed. It is in a state.
- the mixed gas is introduced into the adsorption tower A in the same manner as in Step 1, and the product gas is discharged outside the tower.
- Product gas is recovered as in step 1.
- the gas in the tower led out from the adsorption tower C through the gas extraction pipe 3 in the tower passes through the automatic valve n, the flow control valve 7, the automatic valve p, the gas reverse flow pipe 4 and the automatic valve j.
- Step 1 the adsorption gas was discharged from the adsorption tower B via the automatic valve d and the desorption gas pipe 6, but in Step 2, the adsorption of the adsorption tower B and adsorption tower C by closing the automatic valve d. Pressure equalization can be achieved between them. As a result, the pressure in the adsorption tower C is further reduced to the second intermediate pressure lower than the first intermediate pressure, and the adsorption tower B is increased in pressure.
- step 3 an adsorption process is performed in adsorption tower A, a second pressure increasing process is performed in adsorption tower B, and a desorption process is performed in adsorption tower C.
- the mixed gas is introduced into the adsorption tower A in the same manner as in Step 1, and the product gas is led out of the tower.
- the product gas is recovered in the same way as in Step 1. Part of it is adsorbed through the product gas return pipe 5, automatic valve q, flow control valve 8, gas reverse flow pipe 4, and automatic valve j. It is introduced into B and the pressure inside adsorption tower B is increased.
- the pressure in the tower is reduced in steps 1 and 2, the automatic valves e, m, n, o are closed, and the automatic valve f is opened. Therefore, unnecessary gas is desorbed from the adsorbent inside the adsorption tower C, and this is discharged to the outside of the tower together with the gas remaining in the adsorption tower C. This desorption gas is discharged through the automatic valve f and the desorption gas pipe 6.
- steps 4 to 6 as shown in FIGS. 2 (c!) To (f), in the adsorption tower A, the first decompression process and the second decompression process are performed in the same manner as the adsorption tower C in steps 1 to 3.
- the adsorption process is performed in the same manner as the adsorption tower A in steps 1 to 3
- the washing process is performed in the same manner as the adsorption tower B in steps 1 to 3.
- the first boosting step and the second boosting step are performed.
- steps 7 to 9 in the adsorption tower A, as in the adsorption tower B in steps 1 to 3, the washing process, the first pressure increasing process, and the first (2) Pressurization process is performed, and the first depressurization process, the second depressurization process, and the desorption process are performed in the adsorption tower B in the same manner as the adsorption tower C in steps 1 to 3, and the adsorption tower C performs the adsorption in steps 1 to 3.
- the adsorption process is carried out in the same way as column A. [0037] Then, by repeating Steps 1 to 9 described above in each of the adsorption towers A, B, and C, unnecessary gas is removed from the mixed gas, and a product gas having a high hydrogen gas concentration is continuously obtained. .
- FIG. 3 to 8 show the coconut shell activated carbon as the first adsorbent D and the Ca-A type zeolite as the second adsorbent E in the present invention at room temperature (25 ° C) for various substances to be removed. ) Shows the adsorption isotherm.
- activated carbon power S is suitable for carbon dioxide, methane, and argon, and that zeolite is suitable as an adsorbent for carbon monoxide.
- the adsorption removal amount of a specific gas component is a value obtained by subtracting the adsorption amount at the desorption pressure on the low pressure side from the adsorption amount at the adsorption pressure on the high pressure side (partial pressure of the gas component).
- the adsorption removal of carbon by carbon, methane, and argon is greater than that of zeolite, and the adsorption removal of zeolite by carbon monoxide is larger than that of activated carbon. .
- Examples of the mixed gas applied to the method of the present invention include those obtained by autothermal reforming of propane to which air and water have been added, and autothermal modification of methanol to which air and water have been added.
- Table 1 shows the gas composition obtained by the quality reaction. Of these, the gas mixture (left side in the table) obtained by the autothermal reforming reaction of the plug pan was used.
- the adsorption pressure (maximum pressure) in the adsorption process is set to 0.85 MPa (gauge pressure) and the desorption pressure is set to atmospheric pressure (0.13 MPa).
- the amount of carbon dioxide adsorbed and removed by zeolite is calculated and compared below based on Fig. 3.
- the amount of carbon dioxide adsorbed on zeolite during adsorption is 81 mlZg, and the amount of carbon dioxide adsorbed during desorption is 53 ml / g, so the amount of carbon dioxide adsorbed and removed in the case of zeolite is 28 ml / g.
- the adsorption removal capacity is about 1.6 times per unit packing amount compared to zeolite.
- carbon dioxide adsorption remains more than twice that of activated carbon even if desorbed to atmospheric pressure, so unnecessary gases other than carbon dioxide (carbon monoxide, nitrogen, etc.) compared to activated carbon. Even if it is adsorbed, the amount of adsorption will be lower than the value shown in the adsorption isotherm due to the effect of carbon dioxide remaining.
- the maximum pressure in the adsorption process is practically 0.5 to 4. OMPa. It is.
- the adsorption pressure in the adsorption step is set to 0.85 MPa (gauge pressure)
- the desorption pressure is set to atmospheric pressure (0.103 MPa)
- methane by activated carbon is used.
- the amount of adsorption and removal of methane and the amount of adsorption and removal of methane by zeolite are calculated and compared below based on Fig. 4.
- the amount of methane adsorbed onto activated carbon during adsorption is 2.0 ml / g
- the amount of methane adsorbed during desorption is 0.2 ml / g, so the amount of adsorption is subtracted from the amount of adsorption.
- the amount of methane adsorbed and removed is 1.8 ml / g
- the amount of methane adsorbed on zeolite during adsorption is 1.
- Oml / g and the amount of methane adsorbed during desorption is 0.1 ml / g.
- the amount of methane adsorbed and removed is 0.9 ml / g, which means that activated carbon has about twice the adsorption removal capacity per unit charge.
- activated carbon has the same characteristics as methane, which absorbs and removes more than zeolite.
- activated carbon is relatively low in the nitrogen gas partial pressure region (high concentration region) and the nitrogen gas partial pressure is relatively low! /, Zeolite is excellent as an adsorbent in the region (low concentration region).
- Activated carbon is packed upstream (high concentration region) in the flow direction of the mixed gas in the adsorption tower, and downstream in the flow direction of the mixed gas. It is suitable to fill zeolite (low concentration region). That is, in this case, the activated carbon on the upstream side removes a relatively high concentration of nitrogen, and the remaining low concentration of nitrogen that cannot be sufficiently removed by activated carbon is efficiently removed by the downstream zeolite. It is possible.
- the activated charcoal adsorbent (first adsorbent D) is packed in the adsorption tower upstream in the flow direction of the mixed gas, and the zeolite system is downstream in the flow direction.
- the adsorbent (second adsorbent E)
- carbon dioxide, nitrogen, methane (or methanol), and argon are preferentially removed from the upstream activated carbon adsorbent!
- the concentration of impurities such as carbon monoxide increases, and the removal of impurities by the zeolite-based adsorbent is performed efficiently.
- the composition of the gas after passing through the activated carbon adsorbent is as shown in Table 2.
- the carbon oxide concentration is about 1.6 to 1.9 times.
- the first adsorbent D is 10% as can be seen from the examples described later. If the second adsorbent E is in the range of 90-50% within the range of ⁇ 50%, a high-purity product gas with a purity of 99.99% or higher can be obtained with a high hydrogen gas recovery rate. This is because the adsorption breakthrough curve is optimized by changing the packing ratio of the adsorbent.
- the embodiment of the present invention has been described above, the scope of the present invention is not limited to the embodiment described above!
- the specific configuration of the hydrogen gas separation method according to the present invention and the separation apparatus used for carrying out the method can be variously modified without departing from the spirit of the invention.
- the number of adsorption towers in the PSA gas separation device is not limited to the three-column type shown in the above example, but the hydrogen separation performance is determined by the movement of the adsorption breakthrough curve in the adsorption tower during adsorption. Therefore, the same effect is exhibited even in the case of two towers or more than four towers.
- Example 1 In this example, by using the PSA gas separation device X shown in FIG. 1 having three adsorption towers, the separation method with each process force described in the above embodiment was performed from a mixed gas under the following conditions. Hydrogen gas was separated.
- a cylindrical one having a diameter of 50 mm is used, and inside thereof, as the first adsorbent, an average pore diameter of 1.7 to 1.8; A total of 2.936 liters of Ca-A type zeolite molecular sieve was filled as the second adsorbent.
- the first adsorbent an average pore diameter of 1.7 to 1.8;
- a total of 2.936 liters of Ca-A type zeolite molecular sieve was filled as the second adsorbent.
- each adsorbent was adjusted so that the filling ratio (volume ratio) of 1 adsorbent was 10% and the filling ratio of the second adsorbent was 90%.
- a mixed gas 45.0% hydrogen, 14.0% carbon dioxide, 7.4% carbon monoxide, obtained by autothermal reforming reaction of propane to which air and water were added, based on volume. , Methane 0.5%, argon 0.4%, and nitrogen 32
- the one containing% was used.
- This mixed gas was supplied at a flow rate of 850 NL / hr.
- the adsorption pressure (maximum pressure) in the adsorption process is 850 kPa (gauge pressure: the following is all!
- the pressure refers to the gauge pressure
- the final pressure in the first decompression process is 640 kPa
- the pressure difference was 210 kPa.
- the end pressure (second intermediate pressure) in the second decompression step was 320 kPa, and the minimum pressure in the desorption step was 6 kPa.
- Table 3 The results are shown in Table 3.
- Example 3 20%: 80% (Example 2), 30%: 70% (Example 3), 40%: 60% instead of the filling ratio of the first adsorbent and the second adsorbent 10%: 90% (Example 4), 50%: 50% (Example 5), 0%: 100% (Comparative Example 1), 60%: 40% (Comparative Example 2), 70%: 30% (Comparative Example 3), Hydrogen gas was separated from the mixed gas in the same manner as in Example 1 except that 80%: 20% (Comparative Example 4) or 100%: 0% (Comparative Example 5). The results are also shown in Table 3.
- Example 7 20%: 80% (Example 7), 30%: 70% (Example 8), 40%: 60% instead of the filling ratio of the first adsorbent and the second adsorbent 10%: 90% (Example 9), 50%: 50% (Example 10), 0%: 100% (Comparative Example 6), 60%: 40% (Comparative Example 7), 70%: 30% (Comparative Example 8), Hydrogen gas was separated from the mixed gas in the same manner as in Example 6 except that 80%: 20% (Comparative Example 9) or 100%: 0% (Comparative Example 10). The results are also shown in Table 4.
- the adsorption ratio of the first adsorbent and the second adsorbent is set to 30%: 70% in the adsorption tower, and the pressure between the adsorption pressure and the first intermediate pressure is changed by changing the first intermediate pressure.
- the difference was 140 kPa.
- hydrogen gas was separated from the mixed gas obtained by the autothermal reforming reaction of propane in the same manner as in Example 1. The results are shown in Table 5.
- Example 12 160kPa (Example 12), 260kPa (Example 13), 280kPa (Example 14), 120kPa (Comparative Example 11), 300kPa (Comparison) Except for Example 12), hydrogen gas was separated from the mixed gas in the same manner as in Example 11. The results are also shown in Table 5.
- the adsorbing pressure and the first intermediate pressure are changed by changing the first intermediate pressure by setting the filling ratio of the first adsorbent and the second adsorbent to 30%: 70% in the adsorption tower.
- the pressure difference from the pressure was 140kPa.
- the mixed gas hydrogen gas obtained by the autothermal reforming reaction of methanol was separated. The results are shown in Table 6.
- Example 16 160kPa (Example 16), 260kPa (Example 17), 280kPa (Example 18), 120kPa (Comparative Example 13), 300kPa (Comparison) Except for Example 14), hydrogen gas was separated from the mixed gas in the same manner as in Example 15. The results are also shown in Table 6.
- the hydrogen gas recovery rate is maximized, and the pressure difference is 140 to 280 kPa.
- the recovery rate of hydrogen gas is relatively high.
- the product gas The hydrogen gas recovery rate can be increased while maintaining a high hydrogen gas concentration.
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CA002669064A CA2669064A1 (en) | 2006-11-08 | 2007-10-31 | Hydrogen gas separation method and separation apparatus |
EP07830932A EP2080735A4 (en) | 2006-11-08 | 2007-10-31 | METHOD FOR SEPARATING HYDROGEN GAS AND SEPARATION APPARATUS |
AU2007318658A AU2007318658A1 (en) | 2006-11-08 | 2007-10-31 | Hydrogen gas separation method and separation apparatus |
US12/513,940 US20100000408A1 (en) | 2006-11-08 | 2007-10-31 | Hydrogen gas separation method and separation apparatus |
JP2008543040A JPWO2008056579A1 (ja) | 2006-11-08 | 2007-10-31 | 水素ガスの分離方法および分離装置 |
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US (1) | US20100000408A1 (ja) |
EP (1) | EP2080735A4 (ja) |
JP (1) | JPWO2008056579A1 (ja) |
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Cited By (2)
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JP2012087012A (ja) * | 2010-10-20 | 2012-05-10 | Kobe Steel Ltd | 高純度水素ガス製造用psa装置の運転方法 |
JP2017202961A (ja) * | 2016-05-12 | 2017-11-16 | 株式会社神戸製鋼所 | 水素ガス製造方法 |
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DE102010047543A1 (de) * | 2010-10-05 | 2012-04-05 | Linde Ag | Abtrennen von Wasserstoff |
US8778051B2 (en) | 2012-03-15 | 2014-07-15 | Air Products And Chemicals, Inc. | Pressure swing adsorption process |
US8715617B2 (en) | 2012-03-15 | 2014-05-06 | Air Products And Chemicals, Inc. | Hydrogen production process with low CO2 emissions |
US20180023668A1 (en) * | 2015-01-30 | 2018-01-25 | Nabtesco Corporation | Panel driving device and heliostat |
FR3046550B1 (fr) * | 2016-01-13 | 2020-02-21 | L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude | Psa h2 avec modification du flux gazeux d'alimentation |
LU93013B1 (en) | 2016-04-04 | 2017-11-08 | Cppe Carbon Process & Plant Eng S A En Abrege Cppe S A | Process for the removal of heavy metals from fluids |
LU93012B1 (en) | 2016-04-04 | 2017-11-08 | Cppe Carbon Process & Plant Eng S A En Abrege Cppe S A | Sulfur dioxide removal from waste gas |
LU93014B1 (en) | 2016-04-04 | 2017-10-05 | Ajo Ind S A R L | Catalyst mixture for the treatment of waste gas |
JP6979023B2 (ja) * | 2016-09-26 | 2021-12-08 | 住友精化株式会社 | 水素またはヘリウムの精製方法、および水素またはヘリウムの精製装置 |
WO2018055971A1 (ja) * | 2016-09-26 | 2018-03-29 | 住友精化株式会社 | 水素またはヘリウムの精製方法、および水素またはヘリウムの精製装置 |
JP6697014B2 (ja) * | 2018-02-09 | 2020-05-20 | Jxtgエネルギー株式会社 | 圧力スイング吸着(psa)装置及び圧力スイング吸着方法 |
JP7090279B2 (ja) * | 2018-03-29 | 2022-06-24 | 国立大学法人東海国立大学機構 | 水素精製装置及び水素精製方法 |
KR102481433B1 (ko) * | 2020-12-03 | 2022-12-27 | 주식회사 젠스엔지니어링 | 암모니아의 분해 혼합가스로부터 수소의 분리 및 정제방법 |
KR102439733B1 (ko) * | 2020-12-03 | 2022-09-02 | 주식회사 젠스엔지니어링 | 중수소와 질소의 혼합가스로부터 중수소의 분리 및 정제방법 |
CN114950068A (zh) * | 2021-02-22 | 2022-08-30 | 国家能源投资集团有限责任公司 | 混合气变温变压吸附分离的方法和系统 |
CN114561235B (zh) * | 2022-01-11 | 2022-12-13 | 广东省氢一能源科技有限公司 | 一种基于压力能回收的氢气天然气混输与分离装置及方法 |
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US6340382B1 (en) * | 1999-08-13 | 2002-01-22 | Mohamed Safdar Allie Baksh | Pressure swing adsorption process for the production of hydrogen |
FR2837722B1 (fr) * | 2002-03-26 | 2004-05-28 | Air Liquide | Procede psa de purification par adsorption d'un gaz pauvre en hydrogene |
JP2004066125A (ja) * | 2002-08-07 | 2004-03-04 | Sumitomo Seika Chem Co Ltd | 目的ガスの分離方法 |
FR2861717B1 (fr) * | 2003-10-31 | 2006-01-20 | Air Liquide | Procede de valorisation des flux gazeux hydrogene issus d'unites reactionnelles chimiques mettant en oeuvre de l'hydrogene |
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2007
- 2007-10-31 AU AU2007318658A patent/AU2007318658A1/en not_active Abandoned
- 2007-10-31 CN CNA2007800415296A patent/CN101535174A/zh active Pending
- 2007-10-31 KR KR1020097011584A patent/KR20090082458A/ko not_active Application Discontinuation
- 2007-10-31 WO PCT/JP2007/071198 patent/WO2008056579A1/ja active Application Filing
- 2007-10-31 JP JP2008543040A patent/JPWO2008056579A1/ja active Pending
- 2007-10-31 EP EP07830932A patent/EP2080735A4/en not_active Withdrawn
- 2007-10-31 US US12/513,940 patent/US20100000408A1/en not_active Abandoned
- 2007-10-31 CA CA002669064A patent/CA2669064A1/en not_active Abandoned
- 2007-11-06 TW TW096141811A patent/TW200831402A/zh unknown
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US3430418A (en) * | 1967-08-09 | 1969-03-04 | Union Carbide Corp | Selective adsorption process |
JP2004292293A (ja) * | 2003-03-28 | 2004-10-21 | Honda Motor Co Ltd | 水素発生装置および水素発生装置の運転方法 |
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Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2012087012A (ja) * | 2010-10-20 | 2012-05-10 | Kobe Steel Ltd | 高純度水素ガス製造用psa装置の運転方法 |
JP2017202961A (ja) * | 2016-05-12 | 2017-11-16 | 株式会社神戸製鋼所 | 水素ガス製造方法 |
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CA2669064A1 (en) | 2008-05-15 |
US20100000408A1 (en) | 2010-01-07 |
EP2080735A4 (en) | 2010-12-01 |
EP2080735A1 (en) | 2009-07-22 |
CN101535174A (zh) | 2009-09-16 |
KR20090082458A (ko) | 2009-07-30 |
TW200831402A (en) | 2008-08-01 |
AU2007318658A1 (en) | 2008-05-15 |
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