Oxygen is essential for removing organic substances from the catalyst during calcination. Generally, if you use a small amount of sample in a reasonably sized furnace, the catalyst will calcine properly. To ensure good results, spread the catalyst evenly in a thin layer to maximize contact with air inside the furnace.

Moisture removal is essential before the catalyst is used in a reaction. This is typically achieved by heating the catalyst in a nitrogen flow within the reactor after catalyst loading .

To determine the best calcination conditions and reactor operating procedures for your specific catalyst, refer to research articles similar to your work.

ok, just you have to be attention if your catalyse is more and it's can infected by air so fast. If no, then no problem