Simulation of Chlorination of High-Titanium Slag in a Bubbling Fluidized Bed
ZOU Wangyang1, GU Sumin2, CHEN Hengzhi1
1. College of Chemistry and Chemical Engineering, Chongqing University, Chongqing 400044, China;
2. State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Science, Taiyuan 030001, China
Abstract： In this work, the shrinking unreacted core reaction kinetic model (SCM) for chlorination reaction of high-titanium slag was built and then its kinetic parameters were obtained through regressing experimental data in a small scale bubbling fluidized bed. A TFM-SCM model was established by coupling SCM with a two fluid model (TFM) to simulate the chlorination process of high titanium slag in a bubbling fluidized bed. The model predictions were in good agreement with experimental results. The simulation results showed that the conversion of TiO2 in the reactor increased with the increase of reaction temperature and chlorine concentration in the feed gas. Reaction temperature was the key factor that affected chlorination reaction of high-titanium slag and the conversion of TiO2 could reach 98% when reaction temperature was 1 223 K. Bubbles were another important factor that influenced chlorination process as chlorination rate was small. Increasing reaction temperature could significantly promote the reaction rate in the emulsion phase, but had a minor effect in the bubble phase. The reaction rate was smaller in the central region, but larger near the wall region.
ZOU Wangyang,GU Sumin,CHEN Hengzhi. Simulation of Chlorination of High-Titanium Slag in a Bubbling Fluidized Bed[J]. Chemical Reaction Engineering and Technology, 2023, 39(5): 405-415.
