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Separation of butane isomers by MFI membranes synthesized in a flow system

MFI type zeolites are the most widely studied zeolites for membrane separations. Conventionally, zeolite membranes are prepared in batch systems by hydrothermal synthesis [1–3]. This method has several disadvantages for use in industrial scale for the synthesis of membranes with large areas and complex geometries that are commonly used in membrane modules. An alternative to batch synthesis is using a flow system where the synthesis solution is flown over the support. In a flow system, much better homogeneity can be provided in terms of the synthesis conditions at different sites of the support. Such a system therefore could be more flexible to prepare membranes with large surface area.