Special Report: Poor hydrotreater reliability can reduce ULSD production

This article reports on the investigation of low production of ultralow sulfur diesel (ULSD) at a middle distillate hydrotreating unit in the Lukoil Neftochim Bulgaria (LNB) refinery, in Bourgas, Bulgaria. Specifically, it focuses on problems arising from unreliable operation of the unit's heat exchangers.This is the revamped LNB middle distillate hydrotreater. (Photographer: Svetoslav Krastev; copyright: Lukoil Neftochim Bourgas, Bulgaria)The investigation reached two main conclusions:1. A failure in the reliable operation of the heat exchanging equipment of a middle distillate hydrotreater can lead to a failure in the production of ultralow sulfur diesel and near-zero sulfur diesel.2. T...

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