2020 CATALYST HANDBOOK INDUSTRY CATEGORIES PROCESS CATEGORIES COMPANY INDEX REFINING Hydrotreating Naphtha catalysts (SENTRY) Application: Shell Catalysts & Technologies' naphtha cracking catalysts have many uses for sulfur and nitrogen removal from valuable refinery streams. Description: Naphtha hydrotreating catalyst systems are the key to the effective and reliable removal of sulfur and nitrogen compounds from valuable refinery streams. Shell Catalysts & Technologies supplies a large fraction of all the naphtha hydrotreating catalysts purchased globally and about two-thirds of all the catalyst used by refiners operating higher-severity units. Design complexity can increase significantly for units that process high amounts of cracked feeds, often incorporating separate diolefin and silicon guard reactors in addition to the main bed reactors. Shell Catalysts & Technologies focuses on these challenging applications, developing optimal catalyst system designs that can include complex heat integration to handle the high exotherms, and permutable reactor designs to manage silicon removal management while achieving high online times. Success in this segment of this application comes with leveraging both the proven capability of the ASCENT portfolio in the removal of sulfur and nitrogen from cracked feeds, and the added protection provided with the SENTRY MaxTrap and OptiTrap catalyst portfolios. (Note: See entry " Shell Catalysts & Technologies- ULSD production catalysts " for information on ASCENT catalysts. This entry covers SENTRY catalysts only.) SENTRY MaxTrap[As] is a NiMo catalyst for naphtha hydrotreating. It is a trilobe catalyst on a high-surface-area alumina extrudate specially formulated to trap arsenic (As) present in a wide range of petroleum feedstocks. It protects high-activity catalysts for significantly longer periods from arsenic poisoning. SENTRY MaxTrap[Si] is a NiMo catalyst for naphtha hydrotreating. It is an alumina extrudate specifically designed to trap silica and is often present in naphtha feeds. It exhibits excellent stability. Advantages: The real strength of naphtha catalysts is sulfur and nitrogen removal, with an emphasis on the nitrogen interaction. Sulfur 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. Getting rid of nitrogen also prevents the formation of ammonium chloride in the downstream section, protects chloride balance and promotes isomerization and ring closure. Development: Shell's nitrogen catalysts are in use by more than 100 customers worldwide. Supplier: Shell Catalysts & Technologies Website: https://www.shell.com/business-customers/catalysts-technologies/ catalysts/refining-catalysts/naphtha-cracking.html Contact: https://www.shell.com/business-customers/catalysts-technologies/ catalysts/refining-catalysts/naphtha-cracking.html Copyright © 2020 Gulf Energy Information. All rights reserved.https://www.hydrocarbonprocessing.com/ https://www.shell.com/business-customers/catalysts-technologies/catalysts/refining-catalysts/naphtha-cracking.html https://www.shell.com/business-customers/catalysts-technologies/catalysts/refining-catalysts/naphtha-cracking.html https://www.shell.com/business-customers/catalysts-technologies/catalysts/refining-catalysts/naphtha-cracking.html https://www.shell.com/business-customers/catalysts-technologies/catalysts/refining-catalysts/naphtha-cracking.html