Conference Dates

May 22-27, 2016


Attrition of catalyst in a fluidized bed reactor is an inevitable issue especially in a commercial unit. Jet cup attrition testing is one of the common methods to study particles attrition mainly caused by particles’ tangential moving and friction with each other or the inner walls. This study is focused on the attrition behavior of commercial methanol to olefins (MTO) catalyst by using a high temperature jet cup. The dependences of attrition index on the inlet gas velocity, operating temperature and time, particle size are investigated, respectively. The attrition mode transits from abrasion to combination of abrasion and fragmentation with the increase of inlet gas velocity. However, it transits from coexistence of abrasion and fragmentation to abrasion with the increase of operating temperature. An expression for the attrition index and these operating parameters is derived. This work may also deepen the understanding on the attrition mechanism of particles in swirl moving in cyclone.