Hydrogenation catalyst drying
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This post was last edited by Internet Invisible Man on 2018-6-2 09:32. For the hydrogenation reaction system, 10 kilograms of nitrogen was used for the first pressurization test, and the airtightness was satisfactory; 20 kilograms of nitrogen were used in the second pressurization test to prepare the catalyst for drying. I was wondering whether it’s necessary to replace the system – that is, whether I should first pressurize it to 10 kilograms and ensure airtightness before replacing the system, and then pressurize it to 20 kilograms before turning on the furnace to dry the catalyst
Strictly speaking, purging should be carried out before the first airtightness test, with the oxygen content in the system not exceeding 0.5%
I don’t use hydrogen; I dry it directly with nitrogen, and after drying is complete, I replace it with hydrogen
If you have an adequate supply of nitrogen. It can be replaced while drying. However, after drying is complete, when introducing hydrogen gas, the oxygen content must be within acceptable limits.
If you have an adequate supply of nitrogen. It can be replaced while drying. However, after drying is complete, when introducing hydrogen gas, the oxygen content must be within acceptable limits.
In other words, the oxygen content within the system is above the limit, but this does not affect nitrogen’s ability to be used as a drying gas, right?
It’s okay, because your catalyst is already in an oxidized state
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The combustible material content is less than 0.2%, and the oxygen content is less than 0.1% – these are two important indicators.