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In-situ infrared spectrum sample tabletting device and application thereof

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: 2018-03-16
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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  • In-situ infrared spectrum sample tabletting device and application thereof
  • In-situ infrared spectrum sample tabletting device and application thereof
  • In-situ infrared spectrum sample tabletting device and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Molecular sieve in situ infrared spectroscopy sample compression

[0033] In this embodiment, first add molecular sieve samples to the in-situ infrared spectrum tableting device, according to figure 1 Assemble the tablet press device, connect the air inlet 4 to high-pressure nitrogen with a pressure of 1 MPa, make the high-pressure nitrogen flow in the air inlet 4 and the sample chamber 9, and discharge it from the filter medium 7 on the cover plate 6 , maintain this state for 2 minutes to make the gas flow in a stable state. Take 0.2g of molecular sieve sample powder that has been ground and have a particle diameter of less than 2 microns, and add it to the sample inlet 5. The sample is carried by the high-pressure gas into the sample chamber 9, and rotates rapidly inside it, maintaining this state for 2 minutes, so that the sample is in the Evenly dispersed in the sample chamber 9. Then turn off the high-pressure nitrogen, and within 3 minutes, the sample will be sl...

Embodiment 2

[0036] The sampling and tableting methods are the same as in Example 1, except that the molecular sieve sample is changed to a hydrogenation catalyst (ground to a particle diameter of less than 2 microns). Comparative example 1:

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Abstract

The invention discloses an in-situ infrared spectrum sample tabletting device and an application thereof. The in-situ infrared spectrum sample tabletting device comprises a pedestal, a sleeve, a pad,a cover plate and a pressure head; the top of the pedestal is in a boss structure, the top of the sleeve is opened, the bottom is in a groove structure, the bottom of the groove structure is in a hollow structure, the groove of the sleeve is arranged at a boss of the pedestal, the pad and the bare surface of a boss of the pedestal are superposed, the cover plate is placed at the top of the sleeve,a center of the cover plate is in the hollow structure, a filtering medium is arranged in the hollow structure, the hollow structure faces to a port at the top of the sleeve, an air inlet pipe is arranged at an upper part of the sleeve, the air inlet pipe horizontally passes through one sidewall of the sleeve, and the air inlet pipe in the sleeve is introduced into a sample bin along a tangent direction of a circle cross section of the sample bin. The device is used during a sample tabletting process, uniform and complete sample compressed tablets can be obtained, and the in-situ infrared spectrum sample tabletting device is convenient for increasing work efficiency and result accuracy.

Description

technical field [0001] The invention relates to the field of infrared spectrum analysis, in particular to an in-situ infrared spectrum sample pressing device and its application in in-situ infrared spectrum sample preparation. Background technique [0002] In situ infrared spectroscopy can directly obtain microscopic information on the catalyst surface under actual reaction conditions. At present, the infrared spectrum displayed by intermediate compounds generated on the catalyst surface can be directly measured by using high-sensitivity Fourier transform infrared spectroscopy (FT-IR). Catalyst characterization has 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 structure and catalytic reaction of catalysts, scientific researchers have never given up the research on in-situ ch...

Claims

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Application Information

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Patent Type & Authority Applications(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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