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A microporous analyzer using two-stage adsorption technology and its application method

A secondary adsorption and analyzer technology, which is applied in the field of micropore analyzers, can solve the problems of high price, increased instrument cost, and limiting the range of use of low-temperature physical adsorption aperture analyzers, so as to reduce costs and realize the effect of repeated use

Active Publication Date: 2017-04-26
北京精微高博仪器有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] When the existing low-temperature physical adsorption pore size analyzer is used to analyze the micropore distribution of less than 2 nanometers, the necessary condition is that the sample chamber can obtain less than 10 -2 The high vacuum of Pa usually requires the use of a two-stage turbomolecular pump, which greatly increases the cost of the instrument, and the price is very expensive, which limits the range of use of low-temperature physical adsorption pore size analyzers.

Method used

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  • A microporous analyzer using two-stage adsorption technology and its application method
  • A microporous analyzer using two-stage adsorption technology and its application method
  • A microporous analyzer using two-stage adsorption technology and its application method

Examples

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Effect test

Embodiment 1

[0032] Such as figure 1 As shown, a micropore analyzer using two-stage adsorption technology includes six solenoid valves, a mechanical pump 8, two fine-tuning needle valves 7, two pressure sensors, a sample tube 11, an adsorption tube 12, two Liquid nitrogen cup 13 and two miniature heating furnaces 14;

[0033] Wherein, the input end of the first electromagnetic valve 1 is communicated with the pipeline for inputting the gas to be tested, and the output end of the first electromagnetic valve 1 is connected with the second electromagnetic valve 2, the third electromagnetic valve 3 and the fourth electromagnetic valve respectively. 4 is connected to the input end, and the output ends of the second solenoid valve 2 and the third solenoid valve 3 are respectively connected with the input end of a fine-tuning needle valve 7, and each solenoid valve is used to adjust the opening and closing of each gas circuit branch. Closed, the output end of the fine-tuning needle valve 7 commu...

Embodiment 2

[0048] Such as image 3 As shown, the difference between embodiment 2 and embodiment 1 is that the micropore analyzer also includes a seventh solenoid valve 15, at this time, there are three fine-tuning needle valves, and the second solenoid valve 2, the third solenoid valve The output ends of the electromagnetic valve 3 and the seventh electromagnetic valve 7 are respectively communicated with the input end of a fine-tuning needle valve 7, and the output ends of the fine-tuning needle valve 7 are all communicated with the input end of the mechanical pump 8, and the three fine-adjusting needle valves 7 are connected according to the It is necessary to set air passages of different sizes. The solenoid valve and fine-tuning needle valve are used to automatically adjust the pumping speed of the mechanical pump. The seventh solenoid valve 15 and fine-tuning needle valve 7 are used to increase the adjustment in extremely low vacuum. Pumping speed to the system.

[0049] The microp...

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Abstract

The invention relates to a micropore analyzer using a secondary adsorption technology and an application method thereof; the micropore analyzer includes at least six electromagnetic valves, a mechanical pump, at least two fine tuning needle valves, at least two pressure sensors, a sample tube, an adsorption tube, two liquid nitrogen cups and two minisize heating furnaces; the output end of a first electromagnetic valve is respectively communicated with the input ends of a second electromagnetic valve, a third electromagnetic valve and a fourth electromagnetic valve, the output ends of the second electromagnetic valve and the third electromagnetic valve respectively communicated with the input ends of the fine tuning needle valves, the output ends of the fine tuning needle valves are communicated with the input end of the mechanical pump; the output end of the fourth electromagnetic valve is respectively communicated with the input ends of the fifth electromagnetic valve and the sixth electromagnetic valve; the output end of the fifth electromagnetic valve is communicated with the input end of the sample tube, and the output end of the sixth electromagnetic valve is communicated with the input end of the adsorption tube. A simple secondary adsorption pump provided by the invention enables the sample tube to obtain high vacuum conditions needed by the micropore analysis.

Description

technical field [0001] The invention relates to a micropore analyzer, in particular to a micropore analyzer using secondary adsorption technology and an application method thereof. Background technique [0002] When the existing low-temperature physical adsorption pore size analyzer is used to analyze the micropore distribution of less than 2 nanometers, the necessary condition is that the sample chamber can obtain less than 10 -2 For a high vacuum of Pa, a two-stage turbomolecular pump must usually be used, which greatly increases the cost of the instrument, and the price is very expensive, which limits the scope of use of the low-temperature physical adsorption pore size analyzer. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide an adsorption tube structure that can be placed separately at the temperature of liquid nitrogen or in a state of in-situ heating, form a parallel connection with the sample tube, consti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N15/08
Inventor 钟家湘
Owner 北京精微高博仪器有限公司