Abstract The quantification of the permeation of the Fischer-Tropsch reaction mixture through a silicalite-1 zeolite membrane in which is integrated in to fixed bed reactor was theoretically investigated. The approach is based on the prediction of the permeation parameters by using two different mechanisms including surface diffusion and gaseous diffusion. It was found that under our investigated conditions, the total permeation could be governed by surface diffusion model since the contribution of this mechanism is dominant versus the gaseous diffusion. Noteworthy, our results show that except for the selective gas permeation of carbon dioxide, the measuring factors of different permeates were proportional to the operating pressure. Hydrocarbons with low molecular weight diffuse greater than long-chain hydrocarbons. Furthermore, the high adsorbed molecules are more likely to be affected by the high processing temperature. It can be also highlighted that the permeate amounts has no important effect on the product distribution which is characterized by the olefins to paraffins ratios. So the assumption that considers the separation of CO 2 without assuming other components permeation is well supported.

中文翻译：

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费托反应混合物通过硅沸石 1 膜反应器的渗透及其对生成的烃分布的影响

摘要 从理论上研究了费-托反应混合物通过硅沸石-1 沸石膜渗透的定量，其中硅石-1 沸石膜与固定床反应器相结合。该方法基于通过使用两种不同机制（包括表面扩散和气体扩散）来预测渗透参数。发现在我们研究的条件下，总渗透可以由表面扩散模型控制，因为与气体扩散相比，这种机制的贡献占主导地位。值得注意的是，我们的结果表明，除了二氧化碳的选择性气体渗透外，不同渗透物的测量因子与操作压力成正比。低分子量的碳氢化合物比长链碳氢化合物的扩散更大。此外，高吸附分子更容易受到高加工温度的影响。还可以强调的是，渗透量对产物分布没有重要影响，其特征在于烯烃与链烷烃的比率。因此，在不假设其他组分渗透的情况下考虑分离 CO 2 的假设得到了很好的支持。