Temperature difference issue in the middle and top of the S zorb reactor
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In the Szorb unit, the temperature rise in the reactor is primarily due to the heat released during the hydrogenation of olefins. Thermocouple measurements show that the temperature is highest in the middle section; logically, the temperature of the reaction products should decrease slightly after passing through the filter at the top. However, the DCS indicates that the temperature at the top is equal to, or even 2-3 degrees Celsius higher than, the maximum temperature in the middle section. How can this be explained? Is it due to instrument measurement issues or operational reasons?
If sulfur in the feed is removed in the middle and lower sections, the temperature rise in the middle and upper sections may be caused by olefin hydrogenation or isomerization