Metal for ultra low sulfur in oxygen process stream

[cjacks7]

I need some help on selecting the metallurgy of sample tubing for an oxygen stream with extremely low sulfur concentrations, 1~2 ppb. The metal needs to be something that will not absorb the sulfur so that we can analyze the process stream. Even a few ppb of sulfur can damage the catalyst that we are running in the system.

 

[btrueblood]

PFA?

I assume that won't work, because your temperature is too high (you mentioned a catalyst). Maybe you would like to tell us the temperature and expected gas composition so we can give you a better guess?

 

[arunmrao]

If it is a high temperature catalyst,my guess is it is Nickel, and Ni has very high affinity to sulphur, readily forming nickel sulphide.

_____________________________________
"It's better to die standing than live your whole life on the knees" by Peter Mayle in his book A Good Year

 

[cjacks7]

The process stream will almost pure oxygen and will be ~600 F.