Is the S content in the methanol-depleted stream from the regenerator of the Lindlar process low-temperature methanol wash affected by season?
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It is summer now, and in my plant the total sulfur content of the lean methanol after regeneration in the low-temperature methanol washing regeneration tower is between 40–60 mg/L these days; usually it’s around 10–20 mg/L. Is this related to the seasonal temperature?
Insufficient cooling capacity in summer; high temperature of poor-quality methanol
It shouldn’t have an impact. What’s the temperature in the regeneration tower? Attempting to reduce the amount of CO2 introduced into the regeneration tower to give sulfur more space for dissolution···
If the capacity of the associated refrigeration system is sufficient, it should be independent of the environment; the main factors affecting it are the operating pressure and temperature of the regeneration tower, as well as the amount of steam used in the reboiler；
Has there been any change in the operating condition of the reboiler compared to before? What is the temperature of the regeneration tower? Does the temperature of methanol change after regeneration? By the way, I have a question: how do you handle the S in methanol, and what methods do you use?
I’m not entirely sure either; I asked around and it’s called gravimetric titration.
None of these indicators you mentioned have changed much.