One-dimensional pseudo-homogenous dynamic reactor model, incorporating detailed Fischer-Tropsch kinetics, was applied in a theoretical analysis of forced periodic operations. A milli-scale fixed-bed reactor was analyzed, using design and operation parameters, obtained previously in a steady-state optimization. Dynamic optimization and NLP methods were utilized to obtain optimal values of amplitude(s), frequency and phase shift(s) of sine-wave variation of inputs, around the corresponding optimal steady-state values, which maximize the productivity of C₅₊ hydrocarbons. Inlet variables that were modulated are: coolant temperature, reactants molar ratio, mass flow rate and pressure. In addition to the single input forcing, simultaneous modulations of multiple inputs were also considered, with combinations of the listed inlet variables. Among the single input cases, periodic variation of the coolant temperature resulted in the highest relative improvement of C₅₊ productivity by 30%. Multiple inputs forcing showed additional potential for improvement, resulting in relative C₅₊ productivity increase of 52% for synchronized modulation of the coolant temperature, reactants molar ratio and mass flow rate. However, the increase in C₅₊ productivity is accompanied with relative increase in methane selectivity of 22–33% (relative to the steady-state value). The results suggest that, in the case of multiple input variations with high amplitudes, modulation of the inlet reactants molar ratio mainly contributes to the increase of CO conversion (e.g. reaction rate), the coolant temperature forcing slightly increases selectivity towards the desirable higher hydrocarbons (C₅₊), while the variation of the inlet mass flow rate enables better reaction temperature control and prevents a thermal runway.

一维拟均相动态反应器模型，结合了详细的费-托动力学，被用于强迫周期操作的理论分析。使用先前在稳态优化中获得的设计和操作参数，对毫规模的固定床反应器进行了分析。利用动态优化和NLP方法来获得输入的正弦波变化的幅度，频率和相移的最佳值，围绕相应的最佳稳态值，这使C ₅₊的生产率最大化碳氢化合物。调节的入口变量为：冷却液温度，反应物摩尔比，质量流量和压力。除了单输入强制外，还考虑了多个输入的同时调制，并结合了列出的入口变量。在单输入情况下，冷却剂温度的周期性变化导致C ₅₊生产率的相对提高最高，达到30％。多个输入强制显示出额外的改进潜力，导致同步调节冷却液温度，反应物摩尔比和质量流量的C ₅₊生产率相对提高52％。但是，C ₅₊的增加生产率伴随着甲烷选择性相对增加22-33％（相对于稳态值）。结果表明，在多个输入变化且幅度较大的情况下，入口反应物摩尔比的调节主要有助于增加CO转化率（例如反应速率），冷却剂温度迫使对期望的高级碳氢化合物的选择性略有提高（ C ₅₊），而入口质量流量的变化可以更好地控制反应温度并防止热跑道。