Methanol Vapor Compatibility with PTFE 1

[jmj5152]

I am building a prototype of an invention that reforms methanol to hydrogen at 120 Celsius, and would like to build (machine) it out of PTFE or PFA. Does anyone have any idea of the limits of PTFE and/or PFA for methanol:steam mixture (1:1.25 molar ratio) at 120-150 celcius?

 

[Eltron]

PTFE gets an "A" rating in 100% methanal to 500°F. That means it has <10% swelling, < 15% loss of tensile strength, and little or no chemical attack. It gets an "A" rating in steam to 450°F, too. PFA gets an "A" rating in 100% methanal to 300°F, or 50% methanal to 450°F. PFA's steam rating is the same as PTFE. I've used Teflon in a lot of projects, and it does very well. Just be careful about relying on it for mechanical strength at elevated temperatures.

Hope that helps.