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Eurecat palladium catalyst reactivation

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EURECAT has developed a skillset to rejuvenate your spent Pd based catalyst systems used in selective hydrogenation operations.

EURECAT has developed a skillset to rejuvenate your spent Pd based catalyst systems used in selective hydrogenation operations.

Published in: Technology, Business

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  • 1. Reactivation of Palladium CatalystsThrough extensive R&D efforts, Eurecat has developed a novel method to recover the activityof spent palladium catalysts. This technology, called Reactivation, involves a multi-step proc-ess that identifies and carefully removes the contaminants causing deactivation of the cata-lyst. After treatment with Reactivation, a high performance catalyst can be returned to the cus-tomer with activity that often approaches the level of fresh catalyst. Conventional regeneration techniques typically involve exposure of the catalyst to high tem- peratures under air and/or steam to remove carbon contamination. Our tests have proven that exothermic treatments such as this almost always lead to sintering of the active palladium sites, resulting in the permanent loss of catalytic activity. In addition, an “air burn” does little to remove other catalyst poisons and in fact can permanently bond some otherwise transient poisons to the active sites. Eurecat’s Reactivation process is much different than standard regeneration techniques. Each project begins with a thorough analysis of the spent catalyst to determine the primary deactiva- tion mechanism and levels of contamination. Once our analysis is complete, a treatment planwill be developed to regain or tune the desirable catalytic properties . After processing a sample in our pilotplant, specially developed hydrogenation activity tests are performed to confirm the effectiveness of the pro-posed treatment plan. Activity test results, including a comparison of the Reactivated catalyst to fresh catalyst,are presented to the customer for approval prior to processing on the commercial scale (when time allows).Installed ApplicationsChemicals / Petrochemicals Refineries• Front End Acetylene Hydrogenation • HF Acid Alkylation Pre-treat• Back End Acetylene Hydrogenation • Sulfuric Acid Alkylation Pre-treat• MAPD• First Stage Pygas Eurecat U.S. Inc Visit us on the web at www.eurecat.com 1331 Gemini, Suite 310 Or send us an email at: info@eurecat.com Houston, TX 77058 Phone : 281.218.0669
  • 2. Hydro Isom erization Com parison 3.5 As Received Methyl 2-butene 3.0 Fresh Methyl 2-butene Reactivated Methyl 2-butene 2.5 2.0Wt% 1.5 1.0 0.5 0.0 0 18 36 54 72 90 108 126 144 162 180 198 Tim e Above catalyst installed in a refinery for a hydrofluoric acid alkylation pre-treat application. Butadiene conversion to the more desirable butene-2 was observed in Eurecat testing. The refinery experienced an octane boost over 2 points in their alkylate when compared to previously installed charges. Front-end Ethylene Catalyst Reactivated isoprene Reactivated isopentene Reactivated isopentane 5.5 Reference isoprene Reference isopentene Reference isopentane 5.0 4.5 4.0 3.5 3.0 2.5 2.0 1.5 1.0 0.5 0.0 0.00 18.00 36.00 54.00 72.00 90.00 108.00 126.00 144.00 162.00 180.00 T ime Front end total raw gas acetylene converter catalyst installed and operating on its 3rd REACTIVATION cy- cle (2+ years for each cycle). Catalyst demonstrates superior selectivity and comparable activity to its reference standard and has demonstrated a wide range of operational stability thus eliminating flaring incidents from hyper-activity.