Heavy Naphtha cut from the atmospheric crude oil distillation column in a refinery is sent to a ‘Naphtha Hydrotreating Unit’. After the naphtha hydrotreating unit, naphtha is sent to an isomerisation unit or a catalytic reformer unit, which often use reforming catalysts. Most reforming catalysts contain platinum as the active material. Sulfur and nitrogen compounds present in naphtha cut from atmospheric distillation column can deactivate the catalyst and must be removed prior to catalytic reforming.

Naphtha Hydro Treater (NHT) USAGE:
Purpose of the naphtha hydrotreating unit is to remove sulphur and nitrogen compounds. The naphtha hydrotreating unit uses a cobalt-molybdenum catalyst to remove sulfur by converting it to hydrogen sulfide that is removed along with unreacted hydrogen.