In this work, a feedstock from a commercial RFCC unit was upgraded over a commercial catalyst in a fixed fluidized bed reactor. The effects of operating conditions such as temperature, weight hourly space velocity and catalyst to oil weight ratio in the range of 460-540 °С, 5-25 h-1, 4-10 g/g, respectively, were investigated and the optimal operating conditions were determined. A fourteen-lump kinetic model was developed to describe the RFCC process and the rate constants were estimated by stepwise method according to fourth order Runge-Kutta algorithm and the least square method based on experimental data. Apparent activation energies were calculated by Arrhenius equation. The model was proved to be capable of predicting the yields of main products, detailed compositions of gasoline (PIONA: n-paraffins, iso-paraffins, olefins, naphthenes and aromatics) and olefins in LPG (propylene and butylene). Besides, secondary reactions of FCC gasoline were investigated to produce clean gasoline of low olefin content. The conversions from olefins to iso-paraffins and aromatics were confirmed as two dominating reaction paths and those from olefins to n-paraffins and from naphthenes to aromatics were also important. Thus, the model could provide instructive information for FCC operation optimization.

Establishment and kinetic analysis of a fourteen-lump model of RFCC process<br />

249th National Meeting (2015)

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