Methanol catalyst
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Dear sea friends, please discuss whether pressure testing can still be carried out after the methanol catalyst is installed in production If possible, what are the maximum pressure and the pressure rise/drop rate?
After the catalyst is loaded, copper-based methanol catalyst manufacturers do not recommend applying pressure again, while nickel-based catalyst manufacturers say it is okay, and the same applies to iron-based catalysts. Has anyone done this before?
Pressurizing with nitrogen is okay, but using process gas is not. The copper-based catalyst overheated immediately when pressurized with process gas to 10 MPa.
Just follow the direction of the process airflow.
At present, there is no process gas; the workshop has simply proposed using a compressor to pressurize the air, but this approach is not appropriate.
Some facilities do not have nitrogen available, and they want to use carbon dioxide gas for pressurization; remember: it is best to avoid using carbon dioxide gas for this purpose.
What other reasons, apart from mechanical and physical factors, contribute to the pulverization of methanol catalysts?
1) The manufacturing process results in insufficient sheet strength； 2) Improper loading method ； 3) The temperature-rise reduction space velocity is low, so water vapor cannot be carried away ； 4) Too rapid pressure rise and fall ； 5) Leakage in the synthesis tower; water immersion during shutdown ； 6) Excessive production load, space-time yield of over 2.
Has it been studied what happens to methanol catalysts when exposed to fire or high temperatures?