Dear fellows

The company I'm working for has few water bath heaters for heating natural gas, before pressure reduction, to avoid the freezing of the equipment downstream. As an alternative I'm looking into catalytic heaters for the same purpose. Can any one provide information about this equipment?

I'm interested in reliability, operability, efficiency, running cost, maintenance, etc.

Theory of the process will be a plus.

Thank you for your time

Gasflo