When I do temperature programmed reduction (TPR) experiments, there are always some water coming off the powder sample. This can interrupt the TCD signal. How can I remove the water in the gas without influencing the gas flow rate? I have tried using dririte column, and found that H2 can be adsorbed/desorbed during the experiment, so the TCD signal was changed.

Can cold trap work? How low the temperature should be?

I have read some paper mentioned using molecular seive. Where can I get it?

Thanks for your information! :(