异丁烷/丁烯固体酸烷基化固定床反应器模型研究

针对异丁烷/丁烯固体酸烷基化固定床工艺过程，建立了一维动态传质模型，并对点活性与有效扩散系数的关联式进行了修正。模型计算结果与实验数据吻合良好，验证了模型的准确性。考察了反应器内烯烃和点活性的时空分布情况，并确定了固体酸催化剂失活的主要原因：反应器入口处，活性位覆盖是催化剂失活的主要原因；随着反应器床层高度增加，孔道堵塞逐渐成为催化剂失活的主要原因。

Modeling of isobutane/butene alkylation using solid acid catalysts in a fixed bed reactor

A dynamic mass transfer model of isobutane/butene alkylation over solid acid catalysts in a fixed bed reactor was established. In the model, a modified equation for the relationship between point activity and effective diffusion coefficient was proposed. It is found that the simulation results fit the experimental data well and the breakthrough time of the bed layer is predicted accurately. By modeling the alkylation process, the time-space distribution of butene and point activity profiles of catalysts can be obtained. Furthermore, the reasons for the deactivation of solid acid catalysts were investigated. It indicates that the main reason for the deactivation of catalysts is the site coverage near the inlet of the reactor, while it is ascribed to the steric effect in the region far away from the inlet.