CAPE-OPEN

Which unit operation will help me to convert solid sulfur into liquid sulfur??
please explain in detail.

Which thermo are you using that contains sulphur in the solid and liquid phases?

In my process sulfur is available in solid state in market. I need to convert solid sulfur into its vapor for my process.
Hence I need to convert solid sulfur to liquid and then to vapour.
Please suggest me a way out.

Are you performing phase separations that require vapor/liquid/solid sulphur to move in different directions?

In other words: does the phase equilibrium need to be predicted accurately?

No, I just need to convert solid sulfur into liquid molten sulfur and later that liquid sulfur into vapor sulfur.

If you are not using phase separations, why do you need to convert the sulphur into vapor?

Because I cant use solid sulfur in my process.
Vapor sulfur is my requirement in the process.

For which particular part of your process is it a requirement, if not for a phase separation? For a reaction?

Yes, I need to react vapor sulfur with pure oxygen to obtain sulfur dioxide.

Then I would suggest reacting the sulphur straight from the solid phase. Predicting a solid-liquid-vapor equilbrium is not straight forward and TEA will not do it for you.