Membrane technology, particularly polymeric membranes, is utilized in major industrial ethylene recovery owing to the very convenient and robust process. Thus, this paper, a composite membrane (CM) comprising SAPO-34 Pebax-1657 was employed conduct separation performance under two operating conditions, including temperatures pressures, ranging from 25.0–60.0 °C 3.5–10.0 bar, respectively. CO2 p...