Colorimetric analysis method for detecting carbon deposition on solid catalyst

A solid catalyst and catalyst technology, applied in the field of optical measurement, can solve the problems of complex operation and long measurement time of thermogravimetric method, and achieve the effect of fast detection rate, low cost and rapid acquisition

Active Publication Date: 2016-04-20
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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Problems solved by technology

[0004] Among the above detection methods, the thermogravimetric method is generally more complicated to operate, the measurement time is long, and the standard lye needs to be replaced regularly

Method used

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  • Colorimetric analysis method for detecting carbon deposition on solid catalyst
  • Colorimetric analysis method for detecting carbon deposition on solid catalyst
  • Colorimetric analysis method for detecting carbon deposition on solid catalyst

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Embodiment 1

[0035] Weigh 5mg, 10mg, 15mg, 20mg, 25mg, 30mg, 35mg, and 40mg of carbon powder and add them to the catalyst with a mass of 1g, and mix the carbon powder and catalyst thoroughly to make them evenly mixed. Put the catalyst mixed with carbon powder into the small tubes respectively, and cover the bottom of the small tubes. Use a scanner to capture the color image of the catalyst from the bottom of the tube, use the software with color picking function to extract the RGB value of the catalyst and calculate the color value ED of the catalyst, The obtained standard curve is y=-38.308x+228.59, see figure 1 .

[0036] A sample of catalyst of unknown carbon content is taken and placed in the vial and covers the bottom of the vial. A scanner was used to capture the color image of the catalyst from the bottom of the tube, and the RGB values ​​extracted by the same software are shown in Table 1. The calculated ED value was 129.5, and the carbon content calculated by bringing it into t...

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Abstract

The invention provides a colorimetric analysis method for quickly detecting carbon deposition on a solid catalyst. The method includes the steps of simulating color situations of carbon-deposited catalysts in a manner of mixing carbon powder and the catalysts, collecting the colors of the catalysts containing carbon powder in different mass through a color imaging device, and comparing the color situations with the color of a to-be-tested solid catalyst to determine the carbon deposition content in the to-be-tested solid catalyst. The method is simple and reliable, can quickly obtain the content information of carbon deposition on the solid catalyst, and has important significance of guiding production.

Description

technical field [0001] The invention relates to the field of optical measurement, in particular to a method for detecting carbon deposits in solid catalysts using a colorimetric analysis method. Background technique [0002] In coal chemical industry, methanol to olefins, petrochemical industry, petroleum refining and other industries, the catalytic reaction process is often accompanied by coke deposition on the surface of the catalyst, which blocks the pores of the catalyst, covers the active center of the catalyst, and reduces the activity and selectivity of the catalyst. Shorten the operating cycle of the catalyst. In order to save production costs, the catalyst is generally burned at high temperature to burn the carbon element in it into CO2, so as to remove the carbon element attached to the surface of the catalyst and achieve the purpose of catalyst regeneration. Therefore, it is of great significance to measure the carbon content in the catalyst during the catalytic ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/27
Inventor 冯亮关亚风李慧张雨
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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