Olefin polymerization, especially of propylene in gas-phase fluidized bed reactors, is increasingly prevalent because of its ability to handle the continuous process, among other advantages. The challenge for modelling this process is solving the high nonlinearity phenomena in such a system. This research studies the influence of catalyst flow rate and superficial gas velocity on the modified two-phase model. The catalyst flow rates were set at 1 × 10⁻⁴, 2 × 10⁻⁴, and 3 × 10⁻⁴ kg/s, while the superficial flow rates were set at 0.35, 0.5, and 0.65 m/s. Production rate, reactor temperature, and heat-loss flow rate were found to be proportional to catalyst flow rate and inversely proportional to superficial gas velocity. Heat loss through the fluidized bed wall had an influence only on the reactor temperature. Finally, predicted reactor temperatures corresponded closely to the pilot plant data, with deviations smaller than 0.5%.

中文翻译：

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催化剂流量和表观气速对气相流化床反应器丙烯聚合反应两相模型的影响

烯烃聚合，尤其是气相流化床反应器中的丙烯聚合，由于其处理连续过程的能力以及其他优点而日益流行。对该过程建模的挑战是解决此类系统中的高非线性现象。本研究研究了催化剂流量和表观气速对修正后的两相模型的影响。催化剂流速设定为1×10 ^-4、2×10 ^-4和3×10 ^-4 kg/s，而表面流速设置为 0.35、0.5 和 0.65 m/s。发现生产速率、反应器温度和热损失流速与催化剂流速成正比，与表观气体速度成反比。通过流化床壁的热损失仅对反应器温度有影响。最后，预测的反应堆温度与中试数据非常接近，偏差小于 0.5%。