Membranes for air cleaning

Air pollution causes several problems for human health and environment. Membrane air cleaning is a recent technology, still under development, that improves the air filtration efficiency through higher performing devices with respect to the traditional ones. In this regard, the chapter deals with the most useful membrane separation techniques for air cleaning. Furthermore, the growing importance in air cleaning applications of polymeric, mixed matrix, and inorganics membranes, produced by different techniques (e.g., phase inversion, electrospinning) and under different configurations (hollow fibers, flat sheet and nanofibers), was also discussed. Meanwhile, the materials used for their preparation and related properties have been well identified and illustrated, paying particular attention to the main areas of application such as protection devices, air conditioners, and recovery (from air) of vapors of organic substances units.