【摘要】 对冷却介质温度沿反应器轴向变化时平行反应的飞温现象进行了研究，揭示出临界等浓度曲线拐点是冷却介质温度沿轴向变化时反应系统发生飞温的临界点。研究结果表明冷却介质对反应系统飞温区域的影响和反应物料与冷却介质的热容量之比α有关，α越大反应系统的飞温区域越大，得到的飞温区域上下限之间的差异也越明显。更多还原

【Abstract】 In this paper, the runaway phenomenon for parallel reactions in fixed bed catalytic reactors with changes of cooling medium temperatures along the axis of the reactor has been studied. It was be founded experimentally that the inflection point of the critical iso concentration curve is critical runaway of the reaction process with the changes of the cooling medium temperatures. The runaway criterion was also obtained for safe operations. The research results showed that the influence of the cooling medium on the runaway region has a relation with ratio of reactant to coolant heat capacity α. The bigger α is, the larger the runaway region is, the larger the discrepancy between the upper and lower limits of the calculated runaway region is as well.更多还原