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Accurate tester for sorbent and method thereof

A test method and adsorbent technology, applied in the direction of instruments, analytical materials, etc., can solve the problems of high cost and limited application, and achieve the effects of low cost, wide application environment and simplified operation process

Inactive Publication Date: 2009-08-05
ALLY HI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to solve the problems of high cost or limited application in the prior art, and provide a method that operates under normal temperature conditions, and the adsorption capacity is obtained by the pressure compensation method, that is, it can be measured by the "molecular tracer method". The instrument has low requirements for test conditions, simple structure and operation, and wider application

Method used

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  • Accurate tester for sorbent and method thereof
  • Accurate tester for sorbent and method thereof
  • Accurate tester for sorbent and method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0065] use as figure 1 The adsorbent precision tester shown is for testing adsorbent AL-GX-09.

[0066] For the convenience of comparison, the conventional volume regulator is used to check the dead space of the fixed volume compensation tank, the adsorption system and the adsorption tank by the volume method and helium gas, and the dead space of the adsorption tank is tested three times respectively, and the following results are obtained: figure 2 As shown in the data table, it can be seen that the dead space measured by the volume adjustment method is 3.727ml, and its error is <±0.7%.

[0067] After using the pressure compensation method and the above-mentioned adsorbent precision tester to measure the data such as image 3 As shown in the data table, the correction pressure volume coefficient K is introduced here (the K values ​​of different gases are corrected separately), which is defined as the amount of gas released when the pressure of the compensation tank drops by...

Embodiment 2

[0078] In order to avoid the error caused by the pressure change caused by the temperature of the compensation tank when testing the performance of adsorbents at different temperatures, a temperature sensor is installed on the outer wall of the compensation tank and the signal is transmitted to the single-chip microcomputer.

[0079] After the test, the data of the temperature of the outer wall of the compensation tank and its internal pressure are obtained as follows: Figure 5 As shown, compared with the ideal gas data curve as Figure 6 As shown, there are buttons in the microcontroller Figure 6 Process for temperature correction of curves with ideal gases.

[0080] In this embodiment, on the basis of Embodiment 1, the output power of the electric heating furnace can also be adjusted through the temperature controller, and the adsorption tank can be heated to keep the adsorption tank at a constant temperature near normal temperature, and the temperature of the adsorption ...

Embodiment 3

[0082] In this example, the adsorption properties of the adsorbent YS on nitrogen and carbon dioxide were tested respectively.

[0083] By the method of embodiment 1, respectively use nitrogen, carbon dioxide to calibrate the tester, and measure the respective K N2 、K C02 , using the above-mentioned adsorbent precision tester on the basis of the steps in Example 1, plus step g, that is, setting different test pressures, and repeating steps b to f, the isotherm at the same test temperature can be obtained.

[0084] Test data such as Figure 7 As shown, the curve drawn by the test data is as follows Figure 8 shown.

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Abstract

The invention relates to an instrument and a method for precisely testing adsorbent, belonging to an instrument and a method for testing a single-component gas static state adsorption isotherm, a single-component gas static state adsorption isobar and other adsorbent characteristics and aiming at solving the problem that the instrument and the method existing in the prior art have high cost or limited application ranges. The testing instrument comprises an adsorption tank, an air intake adjusting valve which can be communicated with the adsorption tank and connected with the gas to be tested, a system pressure transducer communicated with the air intake adjusting valve, a compensation adjusting valve, a vacuum adjusting valve, a compensatory pressure transducer communicated with the compensation adjusting valve, a compensating tank of fixed volume and a single chip microcomputer electrically connected with the system pressure transducer and the compensatory pressure transducer. The method is a pressure compensating method adopting the testing instrument. The invention can be widely used for testing the performance of various industrial adsorbents or novel adsorbents like silica gel, molecular-sieve type activated carbon, and the like.

Description

technical field [0001] The invention belongs to a tester and a method for measuring static adsorption isotherms, isobars and adsorption characteristics of a single-component gas. Background technique [0002] Adsorbents are widely used in chemical industry and related fields. There are many kinds of adsorbents. Their adsorption capacity and technical performance can be reflected by testing the characteristic parameters such as adsorption capacity, isotherm and isobar. [0003] Most of the existing testing instruments are based on the principle of volumetric testing, and the main component for obtaining data in the instrument is a volume regulator with high precision and high airtightness. Due to the difficulty in processing and manufacturing, high cost and difficult maintenance, it is unfavorable for widespread promotion. [0004] Patent No. 98241351.3 of the Chinese patent "Specific Surface and Pore Distribution Measuring Instrument of Porous Substances" discloses an adsor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N7/04
Inventor 朱爱民王业勤王迪颜慎德
Owner ALLY HI TECH CO LTD
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