Naphtha hydrotreating catalysts are the key to the effective removal of sulphur and nitrogen compounds from valuable refinery stream. We supply about one-third by weight of all the naphtha hydrotreating catalysts purchased globally and about two-thirds of all the catalyst used by refiners operating higher-severity units.

Naphtha is catalytically reformed within many refineries to produce a high-octane gasoline blending component. Catalytic reforming is also a very important refinery process for another reason: the reformer is a significant source of the hydrogen required by various critical processes across the refinery and is often in short supply. The performance and reliability of the reformer are heavily dependent on the quality of the naphtha feedstock. Sulphur and nitrogen compounds must be removed from the naphtha to protect the sensitive noble metal catalysts (usually platinum but also rhenium) used in the reforming process.

Nitrogen removal is key

The real strength of our catalysts for this application is nitrogen removal. Getting rid of nitrogen prevents the formation of ammonium chloride in the downstream section of the catalytic reformer and protects the chloride balance in the unit. This is important because, although the noble metal provides the catalytic sites for the dehydrogenation reactions occurring in the reformer, it is the chlorinated alumina support that has the acid sites to promote isomerisation and ring closure.

Product information - Naphtha
Catalyst Type/Applications Description
SENTRY MaxTrap[As]
* Improved
NiMo - Naphtha Hydrotreating Trilobe catalyst on a high surface area alumina extrudate specially formulated to trap Arsenic (As) present in a wide range of petroleum feedstocks. Protects high activity catalysts for significantly longer periods from arsenic poisoning. Demonstrates exceptional stability in this severe environment.
SENTRY MaxTrap[Si] NiMo - Naphtha Hydrotreating Alumina extrudate specifically designed to trap silica often present in naphtha feeds. Exhibits excellent stability.
DN-140 NiMo - Naphtha Hydrotreating Enhanced silicon removal catalyst with good sulphur and nitrogen removal activity applied to coker naphtha.
DN-3532 *New* NiMo - Naphtha Hydrotreating ASCENT catalyst designed for use in naphtha units processing cracked stocks from coker or tar sands derived naphthas where maximum denitrification activity is desired.
DC-2535 *New* CoMo - Naphtha Hydrotreating ASCENT catalyst designed for use in naphtha units processing straight run stocks for pre or post treat derived naphthas where maximum desulfuriszation activity is desired.
DC-2532 CoMo - Naphtha Hydrotreating ASCENT catalyst designed for use in naphtha units processing straight run stocks for pre or post treat derived naphthas where moderate desulfuriszation activity is desired and contaminents shorten cycle life.

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