“…Zeolites, natural or synthetic, are wonderful materials because of their structural nanopores. Actually, the size of zeolite pores is at the molecular level, which makes them a suitable candidate for gas separation applications. − Thanks to their wonderful chemical and mechanical features, zeolites have shown an effective performance for gas separation, and now they are an interesting topic of many theoretical and experimental studies. − Compared to natural zeolites, synthetic ones are widely used in membrane-based separation technology because of their regular particle size and high purity . PWN (PST-29) is a new type of zeolite family, which consists of five building units including lta , d 8 r , pau , t - plg , and t - oto .…”