A tubular reactor internals was proposed in order to suppress hot spot formation in catalyst bed. The reactor internals was designed to adjust the effective inner diameter in the front region of the catalyst bed where the hot spot was most likely to be formed. A bench-scale CFD reactor model with a 50 mm diameter and 1000 mm height was employed to verify the performance of the reactor internals under Fischer-Tropsch reaction conditions and to optimize its key parameters: neck diameter and frustum cavity height. The simulation results for the optimized reactor internals showed that the maximum temperature rise decreased by as much as 22.6 % while the change in the rate of CO conversion was less than 2.13 % and the C₃₊ product selectivity increased slightly.

Moreover, the mechanism whereby the internals inhibiting the hot spot was discussed from the aspects of the heat transfer and the dispersion of reaction heat intensity.

为了抑制催化剂床中热点的形成，提出了管状反应器内部。设计反应器内部以调节最可能形成热点的催化剂床的前部区域的有效内径。使用直径为50毫米，高度为1000毫米的台式CFD反应器模型来验证费托反应条件下反应器内部的性能，并优化其关键参数：颈部直径和截头圆锥体腔高度。优化的反应器内部部件的模拟结果表明，最大温度升高降低了多达22.6％，而CO转化率的变化小于2.13％，C ₃₊产物的选择性略有提高。

此外，从传热和反应热强度的分散方面讨论了内部抑制热点的机理。