(March 12, 2011 One Question per Day) What is the reason for the low temperature rise in the bed of the sulfur exhaust hydrogenation reactor? How to solve it?
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This post was last edited by zhezi2009.wang on 2011-3-11 at 16:32. This issue arose not long after we replaced the low-temperature catalyst in the hydrogenation reactor of the sulfur off-gas unit; the temperature rise in the catalyst bed was minimal (less than 10 degrees). Slight fluctuations in the air supply to the sulfur unit could easily lead to blockages in the quench tower. Could everyone please analyze why the temperature rise in the bed of the hydrogenation reactor is low? How to solve it? Thank you!
This post was last edited by adsl121 on 2011-3-11 at 16:50. Please provide more specific details: what type of catalyst is being used, what is the inlet temperature, what is the temperature of each layer of the bed, and so on. Please contribute actively
It is analyzed that the air supply for sulfur production should be sufficient; whether the reaction temperature in the hydrogenation reactor can reach the activation temperature of the catalyst is a concern, and it is recommended to increase this temperature.
1. Is there a problem with the catalyst’s activity? 2. Is the inlet temperature appropriate? 3. The levels of SO2, COS, and CS2 in the process gas during import are low. 4. Is the amount of hydrogen added insufficient?
I’m not sure what temperature rise is required for low-temperature catalysts (you can consult the catalyst supplier) On the other hand, what is the hydrogen level at the outlet of your hydrogenation reactor? Is there a problem with insufficient hydrogen? Even slight fluctuations in the air supply to the sulfur unit can easily lead to blockages in the quench tower; this indicates that SO2 and S in the exhaust gases enter the quench tower without being fully hydrogenated, thereby causing blockages in the tower.
Reply 1# nxrjb 1. Check the hydrogen content after hydrogenation； Ensure that the hydrogen content meets the requirements: 2. Consider catalyst activity ； By comparing with the technical parameters provided by the manufacturer, it is necessary to check whether the current operating temperature is too low and thus affects the catalyst’s activity. Based on the observed phenomena, it seems that the hydrogenation reaction is not complete; during fluctuations, elemental sulfur or sulfur dioxide passes through the catalyst bed and enters the scrubber, causing blockages.
The poster said it’s a newly replaced catalyst – could it be that it hasn’t been properly sulfided? Also, what is the hydrogen sulfide content in the exhaust compared to that in the inlet? Active participation