Abstract
A session on hydrogen processing, presented at the 1998 NPRA Question and Answer Session on Refining and Petrochemical Technology, Washington, DC, covers process variables in hydrotreating coker naphthas; selective desulfurization of FCC naphtha with minimal octane loss; MTBE and/or TAME in purchased naphthas; impact of chloride carryover on a hydroprocessing unit; impact of unit hydrogen partial pressure on the choice of catalyst type when producing future European diesel; changing diesel hydrotreater product sulfur from 500 to 50 wt ppm in an existing unit; running a ramped temperature profile operation in a hydrotreating unit; comparison between FCC feed hydrotreating vs. FCC naphtha hydrotreating for reducing gasoline pool sulfur; FCC yield improvements realized by increasing the severity of the hydrotreating operation; comparison between ex situ and in situ presulfiding methods; product quality problems; hydrocracking heavy feeds; techniques to combat high radial temperature spreads in hydrotreater or hydrocracker catalyst beds; parameters determining the optimum reactor pressure; monitoring water quality used for washing reactor effluent heat exchangers; operating parallel hydrotreaters with different feeds and operating objectives in each train; hydroprocessing wide boiling range feeds; and alternative routes to conventional hydroprocessing.
Original language | English |
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State | Published - 2000 |
Externally published | Yes |