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A kind of in-situ infrared spectrum sample pressing device and its application

A technology of infrared spectroscopy and tablet pressing device, which is applied in the field of infrared spectroscopy analysis, can solve the problems of high sample density, difficult sample laying, and small volume, and achieve the effect of small volume, easy implementation, and reasonable structure

Active Publication Date: 2022-06-07
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because the catalyst metal content is usually relatively high, the sample density becomes higher and the volume becomes smaller, and it is difficult to spread the sample evenly on the tableting mold, which brings greater difficulties to obtain qualified tableting

Method used

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  • A kind of in-situ infrared spectrum sample pressing device and its application
  • A kind of in-situ infrared spectrum sample pressing device and its application
  • A kind of in-situ infrared spectrum sample pressing device and its application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Molecular sieve in situ infrared spectroscopy sample tableting

[0033] In the present embodiment, the molecular sieve sample is first added to the in situ infrared spectral tableting apparatus, in accordance with the instructions Figure 1Position and connection relationship to assemble the tablet pressing device, the air inlet 4 is connected to the high pressure nitrogen with a pressure of 1MPa, so that the high-pressure nitrogen flows in the intake port 4 and the sample chamber 9, and is discharged by the filter medium 7 on the cover plate 6, maintaining the state for 2 min so that the gas flow is in a stable state. Take 0.2g of the milled and particle diameter of less than 2 microns of molecular sieve sample powder, added to the sample addition port 5, the sample is carried into the sample chamber 9 by the high-pressure gas, and quickly rotated inside it, turned to maintain the state for 2min, so that the sample is evenly dispersed in the sample chamber 9. Then turn off ...

Embodiment 2

[0036] The injection and tableting methods are the same as In Example 1, but the molecular sieve sample is changed to a hydrogenation catalyst (ground to a particle diameter of less than 2 microns). Comparison Example 1:

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Abstract

The invention discloses an in-situ infrared spectrum sample tablet pressing device and its application. The in-situ infrared spectrum tablet pressing device includes a base, a sleeve, a gasket, a cover plate and an indenter; the top of the base is a boss structure, and the sleeve The top is open, the bottom is a groove structure, the bottom of the groove structure is hollow, the groove of the sleeve is installed on the boss of the base, the gasket coincides with the exposed surface of the boss of the base, the cover plate is placed on the top of the sleeve, and the cover plate The center is a hollow structure, the hollow structure is equipped with a filter medium, and the hollow structure is facing the opening of the top of the sleeve; the upper part of the sleeve is provided with an air inlet pipe, and the air inlet pipe runs through one side of the sleeve horizontally, and the air inlet pipe inside the sleeve is along the sample chamber. The tangential direction of the circular cross-section enters the sample chamber. The device is applied in the sample pressing process, and can obtain uniform and complete sample pressing, which is convenient for improving work efficiency and result accuracy.

Description

Technical field [0001] The present invention relates to the field of infrared spectroscopy, particularly to an in situ infrared spectroscopic sample tableting apparatus and application in in situ infrared spectroscopy preparation. Background [0002] In situ infrared spectroscopy directly obtains microscopic information on the surface of the catalyst under actual reaction conditions. Currently, the highly sensitive Fourier Infrared Spectroscopy (FT-IR) can be used to directly measure the infrared spectrum shown by intermediate compounds generated on the surface of the catalyst. Catalyst characterization has always been committed to fully understanding the structure of the catalyst at the atomic level, and the key is to study the structure of the catalyst in the working state, that is, in situ characterization. In order to fully and intuitively understand the catalyst structure and catalytic reaction, scientific researchers have not given up the study of in situ characterization o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/3563
CPCG01N21/3563G01N2021/3572
Inventor 赵国利吴洪新王少军张会成凌凤香崔晓莉
Owner CHINA PETROLEUM & CHEM CORP
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