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A system for detecting the adsorption capacity of a molecular sieve under high-pressure conditions and a detecting method thereof

A technology for detecting molecules and adsorption capacity, which is applied in the field of chemical detection, can solve the problems of complex test equipment, cumbersome test process, and high cost, and achieve the effects of short time required, low cost, and avoiding test errors

Active Publication Date: 2017-11-10
SHANGHAI LVQIANG NEW MATERIALS CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The configuration of standard concentration high-pressure medium is not only time-consuming, but also expensive. For different impurity concentrations, multiple standard media need to be configured. This kind of test device is complicated and the test process is cumbersome.

Method used

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  • A system for detecting the adsorption capacity of a molecular sieve under high-pressure conditions and a detecting method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Such as figure 1As shown, the high-pressure liquid storage tank 1, the first impurity tank 2, the second impurity tank 3, and the molecular sieve adsorption tank 4 are cleaned, dried, and vacuumized for later use. Vacuumize the high-pressure liquid storage tank 1, weigh and record. Connect it to the liquefied petroleum gas filling system, open the valve, and fill the high-pressure liquid storage tank 1 with liquefied petroleum gas. After filling, close the valve, weigh the high-pressure liquid storage tank 1, and calculate the mass of the filled liquefied petroleum gas to be 2430g. Use a microsampler to slowly pipette 2.5g of water into the first impurity tank 2; use a microsampler to slowly pipette 0.8g dimethyl disulfide into the second impurity tank 3, and weigh 10.0g of fresh 13X Add the molecular sieve sample to the molecular sieve adsorption tank 4 and vacuumize; connect the high-pressure liquid storage tank 1, the first impurity tank 2, the second impurity tank...

Embodiment 2

[0043] The high-pressure liquid storage tank 1, the first impurity tank 2, and the molecular sieve adsorption tank 4 are cleaned, dried, and evacuated for later use. Vacuumize the high-pressure liquid storage tank 1, weigh and record. Connect it to the high-pressure propylene filling system, open the valve, and fill the high-pressure liquid storage tank 1 with propylene. After filling, close the valve, weigh the high-pressure liquid storage tank 1, and calculate the mass of filled propylene to be 2590g. Use a micro-sampler to slowly pipette 2 g of water and add it to the first impurity tank 2; weigh 12.0 g of fresh 3A molecular sieve sample and add it to the molecular sieve adsorption tank 4 and vacuumize it; , The molecular sieve adsorption tank 4 is connected through pipelines; turn on the heater of the first impurity tank 2, heat up to 100°C, heat and vaporize the water in the first impurity tank 2, open the second flow control valve 6, and let the heated and vaporized wat...

Embodiment 3

[0045] The system for detecting the adsorption capacity of molecular sieves under high pressure conditions includes a high-pressure liquid storage tank 1, an impurity injection unit connected to the outlet of the high-pressure liquid storage tank 1 in turn, a molecular sieve adsorption tank 4 and a detection instrument, the inlet of the high-pressure liquid storage tank 1 and the The external high-pressure medium delivery pipeline is connected, and the first flow control valve 5 and the second flow control valve 6 are respectively set between the high-pressure liquid storage tank 1 and the impurity injection unit, between the impurity injection unit and the molecular sieve adsorption tank 4, and the molecular sieve adsorption A pressure reducing valve 8 is also provided between the tank 4 and the detection instrument, and the molecular sieve adsorption tank 4 is connected with an external vacuum pump.

[0046] In this implementation, the impurity injection unit is composed of t...

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Abstract

The invention relates to a system for detecting the adsorption capacity of a molecular sieve under high-pressure conditions and a detecting method thereof. The system includes an impurity injecting unit, a molecular sieve adsorption tank and a detection instrument which are communicated with an outlet of a high-pressure liquid storage tank in order, and the high-pressure liquid storage tank. The inlet of the high-pressure liquid storage tank is communicated with an external high-pressure medium conveying pipeline. A first flux control valve and a second flux control valve are respectively disposed between the high-pressure liquid storage tank and the impurity injecting unit as well as between the impurity injecting unit and the molecular sieve adsorption tank. A pressure reducing valve is disposed between the molecular sieve adsorption tank and the detection instrument. The molecular sieve adsorption tank is connected to an external vacuum pump. The impurity injecting unit includes at least one impurity tank. Compared with the prior art, the adsorption capacity of a molecular sieve material for different impurities under high-pressure conditions can be tested by the system and the method, adsorption temperatures, impurity species and impurity concentrations can be easily adjusted in the testing method, and tests on the co-adsorption capacity of a plurality of impurities can be achieved.

Description

technical field [0001] The invention belongs to the technical field of chemical detection, and relates to a system for detecting the adsorption capacity of molecular sieves under high pressure conditions and a detection method thereof. Background technique [0002] Molecular sieve materials can achieve selective adsorption of various molecules due to their uniform pore size and high specific surface area. As an adsorbent, molecular sieves have extremely high separation accuracy and separation rate, and the adsorption process is reversible, so they can be used in a wide range of fields . Molecular sieves are often used in high-pressure media to remove impurities. The presence of impurities will affect the subsequent processes, such as dehydration, dealcoholization, and desulfurization of various hydrocarbons, so as to meet the purity requirements of different processes for materials. The good adsorption performance of molecular sieve adsorbent is the basic condition of the a...

Claims

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Application Information

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IPC IPC(8): G01N15/08
CPCG01N15/08G01N2015/0866
Inventor 张佳王鹏飞周永贤朱琳何秋平
Owner SHANGHAI LVQIANG NEW MATERIALS CO LTD