AM-01-22 REVAMP YOUR HYDROTREATER TO MANUFACTURE ULTRA LOW SULFUR DIESEL FUEL

Description:

There are a number of options that can be considered for an existing diesel hydrotreater that will directionally improve sulfur removal. The objective of this paper is to identify the scope and capital investment costs for revamping two existing hydrotreaters to meet the new sulfur standard. For the purpose of this study, a product sulfur specification of 8-wppm was chosen. The base designs are typical for new hydrotreaters that were commissioned in the early nineties to meet the original low sulfur specifications for on road diesel fuel (500 wppm sulfur). Revamp options are presented for existing designs with and without recycle gas amine scrubbing. The unit without amine scrubbing of the recycle gas was originally designed with a larger reactor volume to compensate for the inhibiting affect of hydrogen sulfide. Revamp requirements for potential future rules pertaining to diesel cetane number, poly nuclear and total aromatics and density are not addressed in this paper. Also, offsite impacts pertaining to segregation of treated product rundown, storage and shipping systems as well the suitability of existing infrastructure systems is outside the scope of this study.