Analyzing the effects of feed characteristics and membrane transport properties are important for designing the industrial-scale pervaporative desulfurization plants. In this study, a new method to analyze the effects of feed composition and membrane characteristics has been proposed, where these properties are represented by average vapor pressure and average permeance coefficient. Spiral wound module geometry is used in this study for more realistic industrial-scale predictions. Results suggested that module performance in terms of stage cut and enrichment factor improved with increasing selectivity of the membrane. However, this effect was profound at lower selectivity (<5) and became negligible at higher selectivity (>10). Moreover, results also depicted that the increase in feed temperature increased enrichment factor when selectivity was low (<2.5), but this trend was reversed when selectivity was greater than 2.5. At a constant membrane selectivity, an increase in permeability reduced the enrichment factor. Thus, membrane selectivity should improve along with membrane permeability for better results. The pervaporation process was found more beneficial for removing highly volatile low molecular weight sulfur-containing compounds. Finally, feed channel temperature drop and permeate channel pressure drop followed the trend of stage cut in all simulations. Therefore, the lower stage cut may improve module efficiency.

中文翻译：

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通过渗透蒸发工艺从流化催化裂化装置 (FCC) 汽油中去除含硫化合物：进料特性和膜传质特性变化的影响

分析进料特性和膜传输特性的影响对于设计工业规模的渗透蒸发脱硫装置很重要。在这项研究中，提出了一种分析进料成分和膜特性影响的新方法，其中这些特性由平均蒸气压和平均渗透系数表示。本研究中使用螺旋缠绕模块几何形状进行更现实的工业规模预测。结果表明，随着膜选择性的增加，模块在阶段切割和富集因子方面的性能得到改善。然而，这种影响在较低选择性 (<5) 下非常显着，而在较高选择性 (>10) 下则可以忽略不计。而且，results also depicted that the increase in feed temperature increased enrichment factor when selectivity was low (<2.5), but this trend was reversed when selectivity was greater than 2.5. 在恒定的膜选择性下，渗透性的增加降低了富集因子。因此，膜选择性应该随着膜渗透性的提高而提高，以获得更好的结果。发现渗透蒸发过程更有利于去除高挥发性低分子量含硫化合物。最后，进料通道温度下降和渗透通道压力下降在所有模拟中都遵循分段的趋势。因此，较低阶段的切割可以提高模块效率。渗透率的增加降低了富集因子。因此，膜选择性应该随着膜渗透性的提高而提高，以获得更好的结果。发现渗透蒸发过程更有利于去除高挥发性低分子量含硫化合物。最后，进料通道温度下降和渗透通道压力下降在所有模拟中都遵循分段的趋势。因此，较低阶段的切割可以提高模块效率。渗透率的增加降低了富集因子。因此，膜选择性应该随着膜渗透性的提高而提高，以获得更好的结果。发现渗透蒸发过程更有利于去除高挥发性低分子量含硫化合物。最后，进料通道温度下降和渗透通道压力下降在所有模拟中都遵循分段的趋势。因此，较低阶段的切割可以提高模块效率。