Table of Contents
Magnetic and Electrical Separation
Volume 11, Issue 3, Pages 141-153

Application of Permanent Dry High Intensity Magnetic Separation for the Processing of Spent FCC Catalyst

1Wolfson Centre for Bulk Solids Handling, University of Greenwich, London SE18 6PF, UK
2School of Chemical Environmental and Mining Engineering, University of Nottingham, University Park, Nottingham NG7 2RD, UK
3Department of Chemical Engineering, University of Birmingham, Edgbaston, Birmingham B15 2TT, UK

Received 10 September 2001; Accepted 26 September 2001

Copyright © 2002 Hindawi Publishing Corporation. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


This paper discusses the application of permanent dry high intensity magnetic separation to improve the efficiency of Fluidised Catalytic Cracking (FCC) systems used in oil refining, causing preferential removal of deactivated (spent) catalyst from the process. It was shown that this technique can provide efficient separation of spent catalyst from fresh, despite some loss of fine particles. The effects of particle segregation were also investigated, with both magnetic and nonmagnetic particles. Separation was found to be particularly good for material above 90gm, but efficiency decreased below this particle size. The paper concludes with recommendations for the implementation of the technology.