INFOSHEET - HYDROCARBON SWEETENING CATALYST CABOT NORIT ACTIVATED CARBON IN HYDROCARBON SWEETENING • Specifically manufactured as catalyst support carbon for hydrocarbon sweetening • Pore distribution designed to slow down fouling of the catalyst and prolong catalyst life • High bed strength to prevent crushing of the carbon bed and lower fines generation • Recommended by leading hydrocarbon sweetening technology providers PERFORMANCE The traditional hydrocarbon sweetening process is used for extraction and removal of mercaptans from liquified petroleum gases (LPG), or from heavier hydrocarbons fractions like napthas, jet fuels, kerosene or diesel. The process relies on a special catalyst to accelerate the oxidation of mercaptans to disulfides at or near the product’s economical rundown temperature. For heavier hydrocarbons activated carbon is used as a catalyst carrier to oxidize the mercaptans. Activated carbon is the primary source of contact between hydrocarbon, caustic and catalyst in fixed-bed hydrocarbon sweetening processes. Specifically manufactured as a catalyst support for hydrocarbon sweetening, DARCO® MRX activated carbon delivers optimized mesopore and macropore volume in combination with sufficient bed strength. This product is designed to slow the fouling of the catalyst by extremely heavy hydrocarbons, and therefore increases the lifespan of the catalyst. The higher bed strength prevents crushing of the activated carbon bed and results in low fines generation. Pore volume and bed strength comparison of DARCO MRX vs. competitive carbons Higher mesopore and macropore volume of DARCO MRX products suggests greater capacity to prevent catalyst fouling and quicker mercaptan conversion. cabotcorp.com INFOSHEET - HYDROCARBON SWEETENING CATALYST Rate at which DARCO MRX removes mercaptans vs. competitive carbons Bed strength comparison of DARCO® MRX vs. competitive carbons Higher bed strength of DARCO MRX means longer lifespan of the catalyst Graphs compiled using data from US Patent US20070123419 A1 PROCESS INFORMATION • Catalyst lifetime is estimated to be over five years • To offset gradual catalyst deactivation, excess air can be added, the operating temperature can be increased slightly, or more frequent caustic circulation can be performed • Catalyst reactivation is typically required once a year - the carbon containing the catalysts is water-washed, steamed, re-alkanized and returned to service • Catalysts can also undergo re-impregnation once the catalyst activity restoration is deemed insufficient • Onsite trainings, application information and samples for testing and analysis are available upon request cabotcorp.com NORTH AMERICA EMEA ASIA PACIFIC SOUTH AMERICA Cabot Corporation Headquarters Two Seaport Lane Suite 1300 Boston, MA 02210 USA TEL +617 345 0100 FAX +617 342 6103 Cabot Norit Nederland B.V. Astronaut 34 3824 MJ Amersfoort THE NETHERLANDS TEL +31 33 4648911 FAX +31 33 4617429 Cabot China Ltd. 558 Shuangbai Road Shanghai 201108 CHINA TEL +86 21 5175 8800 FAX +86 21 6434 5532 Cabot Brasil Industria e Comericio Ltda. Rua do Paraiso 148 – 5 andar Sao Paulo 04103-000 BRAZIL TEL +55 11 2144 6400 FAX +55 11 3253 0051 This information is provided for informational purposes only. No guarantee or warranty as to this information, or any product to which it relates, is given or implied. Cabot disclaims all warranties express or implied, including merchantability or fitness for a particular purpose as to (i) such information, (ii) any product or (iii) intellectual property infringement. In no event is Cabot responsible for, and Cabot does not accept and hereby disclaims liability for, any damages whatsoever in connection with the use of or reliance on this information or any product to which it relates. DARCO is a registered trademark of Cabot Corporation. ©2014 Cabot Corporation. All rights reserved worldwide.
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