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Light path continuously adjustable catalyst dynamic structure in-suit representation device, and applications thereof

A dynamic structure and catalyst technology, applied in measurement devices, material analysis using radiation, material analysis using radiation diffraction, etc., can solve the problems of affecting the signal-to-noise ratio, large dead volume of X-ray path, and inability to obtain information from large angles. , to achieve the effect of continuously adjustable optical path, convenient optical path size and wide application range

Pending Publication Date: 2017-05-10
SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The sample cell involved in the patent ZL200910075167.3 has no medium access and exit channels, and cannot perform in-situ characterization of catalytic reactions involving gas or liquid media; when it is used for XRD characterization, large-angle information cannot be obtained
For the sample cell of patent ZL200910075168.8, when conducting experiments involving high-pressure gas media, the dead volume on the X-ray path is large, which seriously affects the signal-to-noise ratio, which reduces the quality of data during in-situ characterization experiments and makes it difficult to utilize the advantages of synchrotron radiation X-rays. great advantage

Method used

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  • Light path continuously adjustable catalyst dynamic structure in-suit representation device, and applications thereof
  • Light path continuously adjustable catalyst dynamic structure in-suit representation device, and applications thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] A catalyst dynamic structure in-situ characterization device with continuously adjustable optical path, which includes a fixed window 1, a sample chamber 2, a movable window 3, a fixed window seat 4, an inlet tube 5, a flat gasket ring 6, a movable window Sheet base 7, rear pressure ring 8, rear cover 9, outlet pipe 10, front cover 11, characterized in that the upper side of the front cover 11 has a long grooved bell mouth, the lower part is small and the upper part is large, and the fixed window 1 is located at the fixed window The upper end surface of the seat 4, the movable window 3 is inlaid on the upper end surface of the movable window seat 7, the movable window seat 7 has a through hole in the axial direction, the movable window seat 7 is located in the fixed window seat 4, and is connected by threads, the fixed window A sample chamber 2 is formed between the plate 1, the fixed window seat 4 and the movable window 3, the fixed window seat 4 has two symmetrical axi...

Embodiment 2

[0044] All devices are the same as embodiment 1, concrete steps:

[0045] (1) Select flexible graphite as the gasket material between the fixed window 1 and the fixed window seat 4, between the flat washer ring 6 and the movable window seat 7, and between the flat washer ring 6 and the rear pressure ring 8. The fixed window 1 and the movable window 3 are made of boron nitride ceramics which are transparent to X-rays.

[0046] (2) Rotate the movable window seat 7 to adjust the size of the sample chamber 2 in the axial direction so that the optical path on the X-ray path is 0.1 mm.

[0047] (3) Put the wafer-shaped Ni / ZnO catalyst in the sample chamber 2, and assemble the catalyst dynamic structure in-situ characterization device with continuously adjustable optical path. The rear cover 9 and the front cover 12 are evenly distributed with 8 large through holes, and the bolts pass through the large through holes. The hole connects the rear cover 9 and the front cover 11 tightly....

Embodiment 3

[0055] All devices are the same as embodiment 1, concrete steps:

[0056] (1) Choose the gasket material between the fixed window 1 and the fixed window seat 4, between the flat washer ring 6 and the movable window seat 7, and between the flat washer ring 6 and the rear pressure ring 8 to be PTFE vinyl. The material of the fixed window 1 and the movable window 3 is polyimide which is transparent to X-rays.

[0057] (2) Rotate the movable window seat 7 to adjust the size of the sample chamber 2 in the axial direction so that the optical path on the X-ray path is 3 mm.

[0058] (3) The disc-shaped Pb / graphene catalyst is placed in the sample chamber 2, and a catalyst dynamic structure in-situ characterization device with continuously adjustable optical path is assembled. The rear cover 9 and the front cover 12 are evenly distributed with 4 large through holes, and the bolts pass through. The large through hole connects and fastens the rear cover 9 and the front cover 11.

[0...

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Abstract

The invention discloses a light path continuously adjustable catalyst dynamic structure in-suit representation device. According to the light path continuously adjustable catalyst dynamic structure in-suit representation device, the upper side of a front cover (11) is provided with a long groove type horn mouth; a fixed window flake (1) is arranged on the upper end surface of a fixed window flake pedestal (4); a movable window flake (3) is embedded in the upper end surface of a movable window flake pedestal (7); the movable window flake pedestal (7) is provided with a through hole in the axial direction; the movable window flake pedestal (7) is immobilized in the fixed window flake pedestal (4); a sample cabin (2) is formed among the fixed window flake (1), the fixed window flake pedestal (4), and the movable window flake (3); the fixed window flake pedestal (4) is provided with two axial circular holes, and is communicated with the sample cabin (2); an inlet pipe (5) and an outlet pipe (10) are inserted into the two axial circular holes respectively; a flat backing ring (6) is arranged between a back pressing ring (8) and the movable window flake pedestal (7); the back pressing ring (8) and a back pressing pedestal (9) are connected via screw threads; a back cover (9) and the front cover (11) are firmly connected via bolts. The light path continuously adjustable catalyst dynamic structure in-suit representation device is capable of realizing catalyst dynamic structure in-suit one-line representation, accurate is high, and application range is wide.

Description

technical field [0001] The invention belongs to a catalyst characterization device and its application, in particular to a catalyst dynamic structure in-situ characterization device with continuously adjustable optical path and its application. Background technique [0002] The vast majority of chemical reaction processes are catalytic processes, and the surface microstructure of the catalyst used is a crucial factor in determining its reaction performance. X-ray plays a very important role in the structural analysis and characterization of catalysts. Since the catalytic reaction process is usually carried out at a certain temperature and pressure, due to the limitations of previous technical conditions, it is very difficult to study the active center of the catalyst and its transition law under real reaction conditions. With the emergence and development of high-brightness, high-collimation, and energy-adjustable synchrotron radiation X-rays, it has provided the possibilit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N23/06G01N23/201G01N23/20
CPCG01N23/06G01N23/20G01N23/201
Inventor 王建国王国富樊卫斌秦张峰董梅何月盛沛
Owner SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI