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本文用动态法研究了C_8芳烃液相吸附分离的一系列重要的性质和参数。在单管吸附柱中,170℃和10公斤/厘米~2的压力下,进行穿透试验。根据穿透曲线的数据,计算了吸附量Q_0与液相浓度C之间的吸附等温线关系,发现在浓度<40%(体积)的情况下,符合Henry定律。计算了吸附质的动态吸附容量,床层饱和度和吸附区长度,发现这些性质随空速的变化而产生明显变化。通过一系列的数学处理和计算方法的改进,理论穿透曲线的计算范围从原来的X=80扩大到X=160,几乎扩大了一倍,而这扩大的部分正是工业生产和设计所实际需要的。本文提出了用两参数优选搜索法拟合穿透曲线,借此可满意地求得吸附总传质系数。
In this paper, a series of important properties and parameters of liquid phase C_8 aromatics adsorption separation were studied by dynamic method. The penetration test was performed in a single-tube adsorption column at 170 ° C and a pressure of 10 kg / cm 2. According to the data of the breakthrough curve, the adsorption isotherm was calculated between the adsorption amount Q_0 and the liquid phase concentration C, and the Henry’s law was found at the concentration of <40% by volume. The dynamic adsorption capacity, bed saturation and adsorption zone length were calculated. It was found that these properties changed obviously with the variation of space velocity. Through a series of mathematical processing and calculation method improvement, the calculation range of theoretical penetration curve has been expanded from X = 80 to X = 160, almost doubled, which is exactly the fact that industrial production and design practice needs. In this paper, a two-parameter optimal search method is proposed to fit the penetration curve, so that the total mass transfer coefficient can be obtained satisfactorily.