Selection of sulfur-resistant shift catalyst protectants
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This post was last edited by happyday0912 on 2017-11-9 at 15:24. Experts: Please discuss issues related to protectants for sulfur-resistant shift catalysts. 1. Which shape offers better protection effect: strip-shaped or four-hole cylindrical protectants? 2. Are there any other options for protective agents besides those provided by the catalyst manufacturer? 3. How can the function of the adsorbent be better utilized during process setup, and is it necessary to superheat the raw gas? Everyone is welcome to discuss.
It mainly depends on the process; if the temperature is above the dew point, the strip-shaped protective agent will certainly have a stronger ability to remove ash. If the temperature is below or near the dew point, it is best to use a four-hole cylindrical protector.
Could you provide a detailed explanation of the characteristics, principles, and usage conditions of these two catalysts? Thank you!
The main framework of the strip shape is magnesium-aluminum spinel, which has a high pore volume and specific surface area, as well as strong capacity to adsorb ash, impurities, etc. After using the strip-shaped protector and breaking it open, it can be seen that it is filled with black impurities that have been absorbed inside. The main component of the four-hole cylindrical structure is aluminum oxide that has been calcined at high temperatures; it serves only as a purely physical barrier, with virtually no adsorption capacity for carbon black, dust, impurities, etc.