The measurement of the Attrition Index typically involves subjecting the catalyst particles to a standardized test that simulates the mechanical stresses experienced during operation. One common method is the ASTM D5757 test, which involves placing the catalyst in a rotating drum or fluidized bed and measuring the amount of fine particles generated over a specified period. The Attrition Index is then calculated as the percentage of the initial catalyst mass that has broken down into fines.
