What material is suitable when the dichloromethane concentration in the exhaust gas is between 1000–5000 mg/m3?
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What material is suitable when the dichloromethane concentration in the exhaust gas is between 1000–5000 mg/m3? The exhaust gas temperature is at room temperature; it can be assumed that there are no other components in the exhaust gas aside from air, etc. Can 304 steel withstand this?
I forgot to mention it: low-pressure steam desorption should be used, with 0.3 MPA of saturated steam for the desorption of dichloromethane
Chloroform slowly decomposes in contact with water over time to produce hydrogen chloride. When using 304, be aware that it is prone to pitting and stress corrosion.
Dichloromethane itself is not highly corrosive; what’s needed is steam distillation. However, steam and dichloromethane vapor can produce hydrogen chloride. 304 steel cannot be used in the presence of chloride ions. The temperature of steam at 0.3 MPa is around 130–140°C, and conventional lining materials are also unsuitable; therefore, duplex steel or INCONEL materials should be considered
Based on experience, there should be no problem. I was wondering if it would be possible to conduct a coating test?
Is 316 feasible?
316 can tolerate dichloromethane in liquid form, but gas forms hydrochloric acid, so 316 is not suitable