The cost parameters for membrane separation of gases are defined in terms of effective selectivity and cost permeability.
将膜分离过程的成本定义为成本渗透率和有效选择性的函数。
Recently, some new methods, such as supercritical chemical reaction, membrane reaction, and reactive distillation, have been applied to improve the selectivity of complex reaction.
近年来，出现了一些提高复合反应选择性的新方法，如：超临界反应、膜反应、反应精馏等。
But membrane technology is a potential solvent recovery means, and the major problem is how to increase the membrane flux and selectivity.
而膜分离法作为最有发展前景的一种回收方法，主要问题为提高膜的通量和选择性。
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