H2S corrosion at >420 °C, materials of construction

[chiukee]

thread124-422341

I read the above old thread and looked into the links for the Unitel and JGC H2S processes and found out that H2 is reacted with molten sulfur at >420 °C.
I am curious to know what type of steel is used for the reactor, because I can't imagine normal stainless steels are suitable.

Best Regards,

CK

 

[Dhurjati Sen]

Dear chiukee,

Possibly Carbon Steel, refractory lined (bricks + castable) just like the Main Furnace or the Incinerator of a Sulphur Recovery Plant.

Regards.

DHURJATI SEN

 

[EdStainless]

There are some high sulfidation resistant alloys (HR-160), but at this level I am thinking about refractory lining.

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P.E. Metallurgy, Plymouth Tube

 

[chiukee]

The reactors are short distillation columns, so cannot be made from refractory lining.
Carbon steel would probably corrode rapidly and would need to be replaced every 3 to 5 years (or less??)
I think probably SS310 or something similar, but I have no real idea. Just curious about what steel is suitable for such high temperatures together with H2S.

 

[Dhurjati Sen]

Dear chiukee,

Nobody talked about using bare CS, it is refractory lined Carbon steel that was mentioned.

Have you seen the reactors? What does the drawing say about the material used?

SS would be susceptible to sensitisation, so it is not anticipated.

Regards.

DHURJATI SEN