What are the reasons for the unqualified quality of diesel and gasoline hydrogenation naphtha?
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What are the reasons for the unqualified quality of diesel and gasoline hydrogenation naphtha? High thiol content
What are the reasons for the unqualified quality of diesel and gasoline hydrogenation naphtha? High thiol content 1. Low reaction temperature ； ⒉The hydrogen-to-oil ratio is too low ； ⒊The device’s processing capacity exceeds the designed value by a large margin ； ⒋The content of thiols in the raw material far exceeds the specified design value ； ⒌The test results are inaccurate ； ⒍Leakage in the heat exchanger for feed and reaction products.
How long has the owner’s device been in use? Is the catalyst at the end of its life? If your unit has just started operating, could it be due to a lower reaction temperature? Also analyze your crude oil to check whether the thiol level is above the limit.
1. Check whether the operation of the post-treatment unit is different from before. 2. Are there any issues with the operation of the hydrogen sulfide removal tower? Top pressure and temperature, gas vapor flow rate and temperature, and bottom temperature. 3. Has the sulfur content in the raw materials increased? 4. The temperature and pressure of the reaction system change.
How much thiol do you control? It’s probably because the reaction depth is small. The issue can be resolved by increasing the reaction temperature rise, raising the reaction pressure, reducing the space velocity, increasing the hydrogen-to-oil ratio, or improving the purity of hydrogen.