Performance testing device for methanol cracking hydrogen production catalyst

Abstract

The utility model discloses a methanol cracking hydrogen production catalyst performance testing device, which relates to the technical field of catalyst performance testing, and comprises a carrier for carrying a catalyst, methanol supply equipment, hydrogen supply equipment, a gas-liquid separator and a gas chromatograph, the carrier is communicated with a gas chromatograph through a gas-liquid separator, and a heater is arranged on the carrier; the combination of the methanol supply equipment, the carrier, the gas-liquid separator and the gas chromatograph is equivalent to a testing device, the combination of the hydrogen supply equipment and the carrier is equivalent to a reduction device, and the heater is matched with the reduction temperature or the reaction temperature provided for the carrier, so that the device integrates reduction and testing into a whole; when the performance test of the methanol cracking hydrogen production catalyst is carried out, the switching between reduction and test can be completed by changing the supply of methanol or hydrogen, so that the test efficiency is greatly improved.

Description

Technical Field

[0001] This utility model relates to the field of catalyst performance testing technology, and in particular to a methanol cracking hydrogen production catalyst performance testing device. Background Technology

[0002] Hydrogen, as a zero-carbon fuel, has good combustion performance and its combustion products are pollution-free. However, due to the difficulty of its storage and transportation, it has not been widely used in the transportation sector. Methanol, as an excellent carrier for hydrogen storage, has been used in various hydrogen production methods, such as methanol cracking and methanol reforming. Among them, cracking hydrogen production only requires methanol as a single feedstock and is more suitable for vehicle use in the transportation sector. Currently, copper-based catalysts are widely used as cracking hydrogen production catalysts because they have the advantages of low cost and good performance.

[0003] Catalyst performance testing is an important method for studying the activity, selectivity, and stability of catalysts. In the current methanol cracking to hydrogen catalyst performance testing process known to the applicant, the methanol cracking to hydrogen catalyst is first reduced in a reduction unit before being switched to a testing unit for testing. The reduction unit and the testing unit are independent of each other, which means that the reduction unit and the testing unit need to be switched during the testing process. Especially when the catalyst is repeatedly tested, it is necessary to switch back and forth, which leads to a reduction in overall testing efficiency.

[0004] Therefore, there is an urgent need for a testing device with high efficiency for testing the performance of methanol cracking hydrogen production catalysts. Utility Model Content

[0005] The purpose of this invention is to provide a performance testing device for methanol cracking to hydrogen production catalysts, in order to solve the problems existing in the prior art. By integrating the reduction device with the testing device, the testing efficiency can be improved.

[0006] To achieve the above objectives, the present invention provides the following solution: The present invention provides a performance testing device for a methanol cracking hydrogen production catalyst, comprising a carrier for supporting the methanol cracking hydrogen production catalyst, a methanol supply device, a hydrogen supply device, a gas-liquid separator with cooling function, and a gas chromatograph. The methanol supply device and the hydrogen supply device are both connected to the carrier. The carrier is connected to the gas chromatograph through the gas-liquid separator. A heater is provided on the carrier for providing a reduction temperature or reaction temperature for the methanol cracking hydrogen production catalyst.

[0007] Preferably, the methanol cracking hydrogen production catalyst performance testing device further includes a protective gas supply device, which is connected to the carrier, and a flow meter is installed on the gas outlet pipeline of the carrier.

[0008] Preferably, the methanol supply device, the hydrogen supply device, and the protective gas supply device are all connected to the carrier via a gasifier.

[0009] Preferably, the protective gas supply device is connected to the carrier via a bypass branch, and the bypass branch is equipped with a heat exchanger for cooling the protective gas. The bypass branch is connected to the protective gas supply device via a valve.

[0010] Preferably, the methanol supply device is a methanol tank, the hydrogen supply device is a hydrogen tank, the protective gas supply device is a protective gas tank, the methanol tank is connected to the carrier through a first flow pump and a first control valve, the hydrogen tank is connected to the carrier through a second flow pump and a second control valve, and the protective gas tank is connected to the carrier and the bypass branch through a third flow pump and a first three-way valve, respectively.

[0011] Preferably, the carrier is provided with a cooler for reducing the temperature of the carrier, and the cooler is provided at both the air inlet and air outlet of the carrier, and the heater is provided around the four sides of the carrier.

[0012] Preferably, the methanol cracking hydrogen production catalyst performance testing device includes a chiller, a cooling coil is installed at the inlet of the gas-liquid separator, the chiller, the cooling coil, the cooler and the heat exchanger are connected in series, the outlet of the heat exchanger is connected to the inlet of the chiller, a third control valve is provided between the cooling coil and the cooler, the outlet of the cooling coil is connected to the inlet of the chiller through a branch pipe, and a fourth control valve is provided on the branch pipe.

[0013] Preferably, the outlet of the gas-liquid separator is connected to the methanol recovery tank through a distillation chamber.

[0014] Preferably, a drying tube is provided between the gas-liquid separator and the gas chromatograph.

[0015] Preferably, the gas-liquid separator is connected to the gas chromatograph and the tail gas treatment device respectively through a second three-way valve, and the gas chromatograph is connected to the tail gas treatment device.

[0016] The present invention achieves the following main technical effects compared to the prior art:

[0017] The combination of methanol supply equipment, carrier, gas-liquid separator, and gas chromatograph is equivalent to a testing device, while the combination of hydrogen supply equipment and carrier is equivalent to a reduction device. At the same time, the heater provides the reduction temperature or reaction temperature for the carrier, so that this device integrates reduction and testing into one unit. When testing the performance of methanol cracking to hydrogen catalyst, the switching between reduction and testing can be completed by changing whether methanol or hydrogen is supplied, which greatly improves the testing efficiency.

[0018] The other solutions of this utility model achieve the following technical effects compared to the prior art:

[0019] The heat exchanger and cooler are configured to provide dual cooling for the carrier, which can quickly cool the carrier when cooling is required or after the test is completed. Especially when cooling is required during the test, the heat exchanger and cooler can shorten the cooling time without waiting for natural cooling, thus further improving the test efficiency. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the performance testing device for the methanol cracking hydrogen production catalyst of this utility model;

[0022] The components include: 1. Methanol tank; 2. Hydrogen tank; 3. Protective gas tank; 4. First flow pump; 5. Second flow pump; 6. Third flow pump; 7. Gasification furnace; 8. Carrier; 9. Gas-liquid separator; 10. Drying tube; 11. Flow meter; 12. Gas chromatograph; 13. Tail gas treatment device; 14. Heater; 15. Cooler; 16. Chiller; 17. Heat exchanger; 18. Primary distillation chamber; 19. Secondary distillation chamber; 20. Methanol recovery tank; 21. First control valve; 22. Second control valve; 23. Third control valve; 24. Fourth control valve; 25. First three-way valve; 26. Second three-way valve; 27. Temperature sensor. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] The purpose of this invention is to provide a performance testing device for methanol cracking to hydrogen production catalysts, in order to solve the problems existing in the prior art. By integrating the reduction device with the testing device, the testing efficiency can be improved.

[0025] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0026] Please refer to the following: Figure 1 As shown, a methanol cracking hydrogen production catalyst performance testing device is provided, including a carrier 8, a methanol supply device, a hydrogen supply device, a gas-liquid separator 9 with cooling function, and a gas chromatograph 12. The methanol cracking hydrogen production catalyst is carried in the carrier 8. Both the methanol supply device and the hydrogen supply device are connected to the carrier 8, and either the methanol supply device or the hydrogen supply device can be selected to supply gas to the carrier 8. The carrier 8 is connected to the gas chromatograph 12 through the gas-liquid separator 9. A heater 14 is provided on the carrier 8 to provide the reduction temperature or reaction temperature for the methanol cracking hydrogen production catalyst. In this device, the methanol supply device, the carrier 8, and the gas-liquid separator 9 are all included. The combination of separator 9 and gas chromatograph 12 is equivalent to a testing device. During testing, methanol is supplied to the carrier 8 to react with the catalyst. The gas-liquid separator 9 separates the methanol, and the gas chromatograph 12 measures the hydrogen content in the cracked gas. The combination of hydrogen supply equipment and carrier 8 is equivalent to a reduction device, using hydrogen as a reducing agent to reduce the catalyst. The reduction device and the testing device work together with heater 14 to provide the reduction temperature or reaction temperature for carrier 8, so that this device integrates reduction and testing into one unit. When testing the performance of methanol cracking to hydrogen catalyst, the switching between reduction and testing can be completed by changing whether methanol or hydrogen is supplied, which greatly improves the testing efficiency.

[0027] A temperature sensor 27 is installed in the bed of the methanol cracking hydrogen production catalyst in the carrier 8 to control the temperature of the methanol cracking hydrogen production catalyst in conjunction with the heater 14.

[0028] The methanol cracking hydrogen production catalyst performance testing device also includes a protective gas supply device, which is connected to the carrier 8. A flow meter 11 is installed on the gas outlet pipe of the carrier 8. When the protective gas is supplied to the carrier 8 alone, the flow meter 11 can be used to detect the air tightness of the carrier 8. The protective gas can be supplied into the carrier 8 together with hydrogen to provide protection for the reduction reaction and improve the reduction effect. After the reduction is completed, the air in the carrier 8 can be purged by supplying the protective gas.

[0029] In this embodiment, nitrogen is used as the protective gas supplied by the protective gas supply device, which has a lower cost; in other embodiments, argon, helium, etc., can also be used.

[0030] The methanol supply equipment, hydrogen supply equipment, and protective gas supply equipment are all connected to the carrier 8 through the gasifier 7. The gasifier 7 can increase the temperature of the gas entering the carrier 8 and play a preheating role. When the gasifier 7 is set up and methanol is supplied, the methanol will be vaporized in the gasifier 7. At this time, the protective gas supply equipment can be used to supply protective gas to drive the methanol gas into the carrier 8.

[0031] The protective gas supply equipment is connected to the carrier 8 through a bypass branch. A heat exchanger 17 for cooling the protective gas is installed on the bypass branch. The bypass branch is connected to the protective gas supply equipment through a valve. The heat exchanger 17 can cool the protective gas supplied to the carrier 8, thereby rapidly reducing the temperature inside the carrier 8.

[0032] In this embodiment, the methanol supply device is methanol tank 1, the hydrogen supply device is hydrogen tank 2, and the protective gas supply device is protective gas tank 3. Methanol tank 1 is connected to carrier 8 through a first flow pump 4 and a first control valve 21. Hydrogen tank 2 is connected to carrier 8 through a second flow pump 5 and a second control valve 22. Protective gas tank 3 is connected to carrier 8 and bypass branch through a third flow pump 6 and a first three-way valve 25, respectively. The first three-way valve 25 can also be used as a valve to control whether the protective gas enters carrier 8 through the bypass branch where heat exchanger 17 is located. In other embodiments, other devices that can supply gas can also be used as methanol supply devices, hydrogen supply devices, and protective gas supply devices.

[0033] A cooler 15 is provided on the carrier 8 to reduce the temperature of the carrier 8. In this embodiment, the cooler 15 and the heater 14 are arranged as follows: the air inlet and outlet of the carrier 8 are both equipped with coolers 15, and the four walls of the carrier 8 are surrounded by heaters 14. In other embodiments, other arrangements can also be used, as long as they can cool and heat the carrier 8. For example, the heaters 14 and the cooler 15 are both arranged on the periphery of the carrier 8. The heat exchanger 17 and the cooler 15 provide dual cooling for the carrier 8, which can quickly cool the carrier 8 when cooling is required or after the test is completed. Especially when cooling is required during the test, the heat exchanger 17 and the cooler 15 can shorten the cooling time without waiting for natural cooling, and further improve the test efficiency.

[0034] In this embodiment, the heater 14 can be an electric heating belt, which can be placed on the carrier 8. In other embodiments, other types of electric heaters or heat exchange plates with hot water can also be used as heater 14.

[0035] In this embodiment, the cooler 15 is a cooling plate with cold water flowing through it, and the chiller 16 is used as the device for supplying cold water. In other embodiments, a forced ventilation fan can also be used as the cooler 15, and the fan directly provides forced ventilation to the carrier 8 to achieve cooling.

[0036] In this embodiment, the cooling structure of the gas-liquid separator 9 is as follows: a cooling coil is installed at the inlet of the gas-liquid separator 9, and the cooling coil is connected to the chiller 16. In other embodiments, other gas-liquid separators 9 with built-in cooling functions can also be selected.

[0037] To reduce the amount of piping required, in this embodiment, the chiller 16, cooling coil, cooler 15, and heat exchanger 17 are connected in series. The outlet of the heat exchanger 17 is connected to the inlet of the chiller 16. A third control valve 23 is provided between the cooling coil and the cooler 15. The outlet of the cooling coil is connected to the inlet of the chiller 16 through a branch pipe. A fourth control valve 24 is provided on the branch pipe. Only one of the third control valve 23 and the fourth control valve 24 is open, which can switch between the working mode of cooling both the carrier 8 and the gas-liquid separator 9 and the working mode of cooling the gas-liquid separator 9 alone.

[0038] The outlet of the gas-liquid separator 9 is connected to the methanol recovery tank 20 through the distillation chamber, which can realize the recovery of methanol separated by the gas-liquid separator 9. The distillation chamber can be set in multiple stages. In this embodiment, a primary distillation chamber 18 and a secondary distillation chamber 19 are set in sequence.

[0039] Because when the gas flow rate is too high or the liquid-air ratio is too high, the gaseous methanol entering the gas-liquid separator 9 may not be completely cooled or the gas-liquid separator 9 may not be able to completely separate the reaction gas and liquid methanol, a drying tube 10 is installed between the gas-liquid separator 9 and the gas chromatograph 12. The drying tube 10 is filled with color-changing silica gel, which will change from blue to pink after adsorbing liquid. The drying tube 10 can absorb the liquid methanol that has not been separated by the gas-liquid separator 9, and the gas-liquid separation effect of the gas-liquid separator 9 can be monitored by observing whether the color changes.

[0040] The gas-liquid separator 9 is connected to the gas chromatograph 12 and the tail gas treatment device 13 through the second three-way valve 26. The gas chromatograph 12 is connected to the tail gas treatment device 13. The tail gas treatment device 13 mainly treats the residual pyrolysis gas discharged from the gas chromatograph 12 during the test.

[0041] In this embodiment, the first control valve 21, the second control valve 22, the third control valve 23, the fourth control valve 24, the first three-way valve 25, and the second three-way valve 26 can all be electrically controlled valves or manual valves.

[0042] In actual use, it is divided into a restoration step and a testing step. Before the restoration step, a fixed flow rate of protective gas is supplied into the carrier 8, and the airtightness of the carrier 8 is checked with the flow meter 11.

[0043] In the reduction step, the flow ratio of hydrogen and protective gas is controlled by the second flow pump 5 and the third flow pump 6. After passing through the second control valve 22 and the first three-way valve 25, the gas enters the gasifier 7 for preheating to form a mixed reducing gas. This gas then enters the carrier 8 and reacts with the methanol cracking hydrogen production catalyst to produce water vapor. In this step, the heater 14 is energized to heat the carrier 8 and maintain it at a suitable reduction temperature. The chiller 16 is turned on to provide cold water to the cooling coil at the inlet of the gas-liquid separator 9. The gas-liquid separator 9 separates the cooled water. The third control valve 23 is closed and the fourth control valve 24 is opened. The heat exchanger 17 and the cooler 15 are not working.

[0044] After the reduction step is completed, close the second control valve 22 and the second flow pump 5 connected to the hydrogen tank 2, and keep the third control valve 23 open to continuously introduce protective gas to purge the hydrogen in the carrier 8. When the gas chromatograph 12 detects no hydrogen in the tail gas, subsequent performance tests can be performed.

[0045] In the test procedure, the first control valve 21 and the first three-way valve 25 are opened, and the matching first flow pump 4 and the third flow pump 6 are turned on. After the liquid methanol enters the gasifier 7 and is vaporized, it is carried by the protective gas into the carrier 8 to undergo a cracking reaction with the methanol cracking hydrogen production catalyst. During the test, the flow rate of methanol can be controlled by controlling the flow pump to change the test liquid-air ratio. The heater 14 controls the heating power according to the feedback of the temperature sensor 27 to provide the catalyst with the required stable reaction temperature. In this step, the chiller 16 runs to provide cold water to the cooling coil to liquefy the unreacted gaseous methanol. After the flow meter 11 reading stabilizes, the gas chromatograph 12 is turned on to measure the hydrogen content in the cracked gas.

[0046] When cooling is required during the test or when carrier 8 needs to be replaced after the test, the first control valve 21 closes to stop supplying methanol, the heater 14 stops working, the third control valve 23 opens, and the chilled water supplied by the chiller 16 enters the cooler 15 to cool the carrier 8 while flowing through the heat exchanger 17. The first three-way valve 25 switches to bypass and directly introduces cooling protective gas to the carrier 8 for rapid cooling. After the temperature sensor 27 reaches the required temperature, the first three-way valve 25 and the third control valve 23 are closed.

[0047] After the test, the first three-way valve 25 is opened to continuously supply protective gas to purge the reaction gas in the exhaust device. At this time, the reaction gas can flow directly from the drying pipe 10 to the exhaust gas treatment device 13 through the second three-way valve 26.

[0048] Any adaptive changes made according to actual needs are within the protection scope of this utility model.

[0049] It should be noted that, for those skilled in the art, it is obvious that this utility model is not limited to the details of the above exemplary embodiments, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of this utility model is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this utility model. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0050] This utility model uses specific examples to illustrate its principles and implementation methods. The above description of the embodiments is only for the purpose of helping to understand the method and core idea of ​​this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the idea of ​​this utility model. In summary, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A performance testing device for methanol cracking to hydrogen production catalyst, characterized in that, The device includes a support for carrying a methanol cracking hydrogen production catalyst, a methanol supply device, a hydrogen supply device, a gas-liquid separator with a cooling function, and a gas chromatograph. The methanol supply device and the hydrogen supply device are both connected to the support. The support is connected to the gas chromatograph through the gas-liquid separator. The support is equipped with a heater for providing a reduction temperature or reaction temperature to the methanol cracking hydrogen production catalyst.

2. The performance testing apparatus for methanol cracking to hydrogen production catalyst according to claim 1, characterized in that, The methanol cracking hydrogen production catalyst performance testing device also includes a protective gas supply device, which is connected to the carrier, and a flow meter is installed on the gas outlet pipeline of the carrier.

3. The performance testing apparatus for methanol cracking to hydrogen production catalyst according to claim 2, characterized in that, The methanol supply device, the hydrogen supply device, and the protective gas supply device are all connected to the carrier via a gasifier.

4. The performance testing apparatus for methanol cracking to hydrogen production catalyst according to claim 2, characterized in that, The protective gas supply device is connected to the carrier via a bypass branch. A heat exchanger for cooling the protective gas is installed on the bypass branch. The bypass branch is connected to the protective gas supply device via a valve.

5. The performance testing apparatus for methanol cracking to hydrogen production catalyst according to claim 4, characterized in that, The methanol supply device is a methanol tank, the hydrogen supply device is a hydrogen tank, and the protective gas supply device is a protective gas tank. The methanol tank is connected to the carrier through a first flow pump and a first control valve. The hydrogen tank is connected to the carrier through a second flow pump and a second control valve. The protective gas tank is connected to the carrier and the bypass branch through a third flow pump and a first three-way valve, respectively.

6. The performance testing apparatus for methanol cracking to hydrogen production catalyst according to claim 4, characterized in that, The carrier is equipped with a cooler for reducing the temperature of the carrier. The cooler is installed at both the air inlet and air outlet of the carrier. The heater is installed around the four walls of the carrier.

7. The performance testing apparatus for methanol cracking to hydrogen production catalyst according to claim 6, characterized in that, The methanol cracking hydrogen production catalyst performance testing device includes a chiller, a cooling coil is installed at the inlet of the gas-liquid separator, the chiller, the cooling coil, the cooler and the heat exchanger are connected in series, the outlet of the heat exchanger is connected to the inlet of the chiller, a third control valve is installed between the cooling coil and the cooler, the outlet of the cooling coil is connected to the inlet of the chiller through a branch pipe, and a fourth control valve is installed on the branch pipe.

8. The performance testing apparatus for methanol cracking to hydrogen production catalyst according to claim 1, characterized in that, The outlet of the gas-liquid separator is connected to the methanol recovery tank through the distillation chamber.

9. The performance testing apparatus for methanol cracking to hydrogen production catalyst according to claim 1, characterized in that, A drying tube is provided between the gas-liquid separator and the gas chromatograph.

10. The performance testing apparatus for methanol cracking to hydrogen production catalyst according to claim 1, characterized in that, The gas-liquid separator is connected to the gas chromatograph and the tail gas treatment device respectively through a second three-way valve, and the gas chromatograph is connected to the tail gas treatment device.

Images