Membrane gas absorption (MGA) is of great interest for SO₂ capture from ship exhaust, as it has high separation efficiency and, more importantly, is comprised of a separator that can be flexibly installed and operated on ships. Here, we report a class of hydrophobic tubular asymmetric ceramic membranes for SO₂ absorption. To find the membranes with reasonable microstructure and geometry, we used a numerical 2D model to simulate SO₂ absorption process and verified the model by comparing its results with experimental data. Simulations showed that most of the SO₂ mass transfer resistance existed in membrane phase, indicating that the optimization of membrane parameters, rather than operational conditions, should be the primary consideration to enhance the overall SO₂ mass transfer performance. Furthermore, simulations indicated that the SO₂ separation performance depended negligibly on membrane pore sizes, but can be significantly improved by optimizing the thickness and inner diameter of membrane tubes. © 2018 American Institute of Chemical Engineers AIChE J, 65: 409–420, 2019

中文翻译：

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疏水性陶瓷膜可吸收船舶尾气中SO 2的微观结构和几何形状的优化

膜气体吸收（MGA）对于从船上废气中捕获SO ₂具有极大的意义，因为它具有很高的分离效率，而且更重要的是，它包含一个可灵活安装并在船上运行的分离器。在这里，我们报告了一类用于SO ₂吸收的疏水性管状不对称陶瓷膜。为了找到具有合理的微观结构和几何形状的膜，我们使用了一个二维二维模型来模拟SO _2的吸收过程，并通过将其结果与实验数据进行比较来验证该模型。仿真表明，大多数SO ₂膜相中存在传质阻力，表明优化膜参数而不是操作条件应该是提高整体SO ₂传质性能的主要考虑因素。此外，模拟表明，SO ₂分离性能可忽略不计地取决于膜的孔径，但可以通过优化膜管的厚度和内径来显着改善。©2018美国化学工程师学会AIChE J，65：409–420，2019