FCC catalyst attrition behavior at high temperatures

Document Type: Research Paper


1 Faculty of Petrochemicals, Iran Polymer and Petrochemical Institute, Tehran, Iran

2 RFCC Senior Process Engineer, Process Engineering Department, Arak Oil Refinery, Arak, Iran



In this work, high temperature attrition was studied in a standard attrition set-up to mimic the FCC regenerator environment with mechanical attrition. Operating conditions were modified in this pilot due to the application of high temperatures. Two parameters, i.e., time and temperature in the ranges of 1 to 5h and 673-973K, were surveyed, respectively. The behavior of attrition and mass loss was then modeled and validated. At higher temperatures mass loss response sensitivity became larger. Finally, PSD and SEM tests were used to investigate the attrition mechanism. In the ambient tests, abrasion was significant while at higher temperatures, fragmentation was considerable. PSD plots shifted into larger particles and SEM images showed those changes as well. In addition, significant reshaping in the PSD curves indicated particle cracking at high temperatures.

Graphical Abstract

FCC catalyst attrition behavior at high temperatures


  • High temperature attrition tests which mimic the regenerator condition has been carried out on a FCC catalyst.
  • Considerable reshaping of PSD plots reported extreme particles cracking at high temperature.
  • Attrition process contour plots addressed optimization point and interaction between temperature and time.


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