Material selection issue
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I currently have a device at hand, which is a hydrogenation reactor. The specified conditions are a design pressure of 6.5 MPa and a design temperature of 365°C. The feed materials are gutter oil and H2 (hydrogen gas); the composition of the gutter oil is as follows: sulfur content of 438 mg/Kg, sodium content of 2.3%, and chlorine content of 110.7 mg/Kg. How should I choose the materials? Please give me some advice. . .
If the design temperature and operating temperature are the same, titanium should be used
Given these high pressures and temperatures, using titanium is rather uneconomical; Cr-Mo duplex steel generally meets the requirements.
A 317L+16Mn composite steel plate can be used, which is a more economical approach.
CR-MO DUPLEX STAINLESS STEEL
Agree with the person above; titanium is too expensive, there’s no need for it. It’s not really necessary; try to avoid using such high-end things if possible
Titanium may absorb hydrogen at such temperatures. Using Cr-Mo steel is also stronger than titanium.
I forgot where I read it; it said that such equipment cannot use duplex steel at temperatures above 350 degrees Celsius.