裂解炉炉管内壁的蒸汽-空气烧焦操作是一个反应温度和浓度沿空司变化的动态过程。此过程可以用一组非线性双曲型偏微分方程描述。为了便于求解及积分的收敛，采用迎风差分格式计算。在烧焦过程模拟中，根据裂解炉炉管高温成焦的特点，采用了沿炉管不变的烧焦反应动力学参数和反应热，模拟计算20h内裂解炉炉管不同时刻的焦层厚度、气固相温度、氧气和水蒸气分压沿炉管的变化，计算结果与工业测量结果相符合，为开发先进的裂解炉在线烧焦技术提供了更加可靠的基础。

Hydrogenation of benzene to cyclohexane was conducted in an adiabatic fixed-bed reactor under a phase transitional condition. In which process, a mixture of benzene and cyclohexane was fed into the reactor at the bottom under the liquid condition, however, the liquid phase disappeared and turned into gas phase at the reactor outlet through vaporization. It follows from this novel idea that the problems associated with reaction heat removal and low catalyst efficiency of the liquid-filled catalyst could be solved simultaneously with emptying of the liquid from the catalyst. However, the benzene concentration in the mixture should not exceed 14% if simple phase transition is employed, since the reaction heat is seven times the liquid vaporization heat. To optimize this primitive operation, a side stream quenching operation was proposed and attempted experimentally, and it was found that the side stream quenching with double injection points could be an acceptable operating strategy.

The paper presents theoretical analysis and experimental results of dilute SO2 oxidation over activated carbon coupled with partial liquid phase evaporation. A dynamic model has been first developed for this combination of reaction with vaporization of liquid in the packed bed. The model reveals the interactions among the exothermic reaction, endothermic vaporization and partial internal wetting of activated carbon pellets. Reliability of the model is verified by the experiments. Secondly, the effects of the two different operation modes and the states of the wetted catalysts on SO2 oxidation are compared. The results have demonstrated that this method has an increased SO2 removal efficiency and a higher sulfuric acid concentration.

Based on theoretical analysis and experimental results, a new attempt has been made to characterize the dynamics of the fluid flowing under conditions of pulsing flow in a trickle-bed reactor (TBR). Two kinds of correlation are proposed for the dynamic liquid holdup under pulsing flow, which can predict the dynamic liquid holdup for a given packing type and given operating conditions.