FCC catalyst attrition behavior at high temperatures

Document Type: Research Paper


1 Faculty of Petrochemicals, Iran Polymer and Petrochemical Institute, P.O. Box: 14965/115, Tehran, Iran.

2 Petrochemical faculty, Iran Polymer and Petrochemical Institute, Tehran, Iran

3 RFCC Senior process Engineer, Process Engineering department, Arak Oil Refinery, P.O. Box:1448, Arak, Iran



In this work, High temperature attrition was studied in a standard attrition set up to mimic the FCC regenerator environment along with mechanical attrition. Operating conditions were modified in this pilot due to application of high temperatures. Two parameters i.e. time and temperature in the ranges of 1 to 5hr and 673-973K were surveyed respectively. The behavior of attrition and mass loss was 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 the SEM images showed those changes as well. In addition, significant reshaping in the PSD curves indicated particles cracking at high temperatures.