Catalyst fines

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Catalyst fines , or catfines for short, are fine-grained catalysts that are used during the distillation of crude oil in petroleum refineries in what is known as catalytic cracking .

They are mainly aluminum and silicon oxides ( Al 2 O 3 and SiO 2 ). According to the latest ISO standard, a maximum of 60 ppm of both oxides are permitted in heavy fuel oil , whereby aluminum should not exceed 30 ppm. Due to their porosity, they have a large effective surface and a low density. Catfines are hard, brittle and abrasive . As some of them remain in residual oils that are used as fuels (heavy oil) for marine diesel engines, they pose a considerable risk to components of the injection system and the partners of the tribological system in the cylinder (piston, piston rings and cylinder liner). Thorough preparation of the fuel Boarding a ship is therefore necessary. The catfines can be separated from the heavy oil using separators . In addition, is filtration of the fuel made.

Individual evidence

  1. ↑ George E. Totten: Fuels and Lubricants Handbook . ASTM International, 2003, p. 150 ( limited preview in Google Book search).
  2. ^ Siegmar Leonard Seidl: Bunker Quality Claims: Disputes about the quality of ship fuels . Diplomica Verlag, 2012, ISBN 978-3-8428-7004-8 , p. 20 ( limited preview in Google Book search).
  3. ↑ Stephan Douvier: Marpol . BoD - Books on Demand, 2012, ISBN 978-3-95427-136-8 , pp. 40 ( limited preview in Google Book search).
  4. ↑ Kay Röber: Study on the efficiency of oil recovery and sludge treatment systems on board ocean-going vessels . diplom.de, 2001, ISBN 3-8324-3115-2 , p. 7 ( limited preview in Google Book search).