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|Accident #||No LDEQ Number Available|
|tate Police #||N/A|
|Pollutant||Duration||Point Source||Greenhouse Gas||Criteria Pollutant||Ozone forming chemical||Amount of Release|
|Sulfur Dioxide||13h||Sulfur Recovery Unit Thermal Oxidizer||NO||YES||NO||1,150.8 pounds|
Accident Classified As: No Information Given
Tail Gas incident due to Sulfur Recovery Unit Train 1 being shut down due to low refinery acid gas production following unscheduled outages of the No.2 Coker and the Cat Feed Hydrotreater. the Sulfur Recovery Unit on Train 2 was forced to switch to combustion air-mode to avoid the possibility of acid flaring.The temperature of the Sulfur Recovery Unit Train 2 No.1 Converter dropped ue to uncombusted pit vapors, resulting in an increase in Sulfur Dioxide from the Thermal Oxidezer
- Refresher training has been conducted with increased emphasis on the importance of monitoring the No. 1 Converter temperature during train transitions to combustion air with pit vapor to prevent recurrence. - Procedure to switch from O2-mode to air-mode was modified to ensure temperature is adequate to handle pit vapors on air-mode. - MDEA lean loading field testing will now include upgraded analysis procedures and will be moved from the field to the lab. - Evaluate project to operate Sulfur Recovery Units in partial O2-enrichment mode to reduce environmental vulnerability.