Catalyst deactivation
Thread Content
The deoxygenation protection layer of the Klaus catalyst may have become inactive; the temperature rises slightly when the flow rate is a bit high. Are there any effective emergency solutions? Operations cannot be stopped during this time.
Oxygen leakage prevention catalysts are typically designed to handle oxygen leakage at the ppm level; in situations where the oxygen concentration is high, catalysts alone are not sufficient to solve the problem. The excessive temperature mentioned by the poster, I think, is caused by excessive air supply. So, should we check whether the online analyzer is operating properly?
Nitrogen can be introduced at the inlet of the Claus reactor for protection, while reducing the air supply volume； If the flying temperature still cannot be controlled, steam can be introduced.
If there is no online analyzer or if the online analyzer is malfunctioning, the key is to properly control the air supply; the temperature rise in the primary and secondary converters is the highest, while the temperature rise in the hydrogenation reactor ranges between 15 and 20°C. There is a lag in the temperature rise of the converter and reactor, and the air supply volume can also be adjusted based on the furnace temperature.