Flow Channel with Wrinkles and Calcium Sites in a Ca-MOF for Direct One-Step Ethylene Purification from C2 Gases and MTO Products Separation

Abstract

The strategy of flow channel with wrinkles and calcium sites for single-step C 2 H 4 purification from C2 gases and methanol-to-olefins (MTO) products separation was realized in FJI-Y9. The adsorption amounts showed a total reversal order of C 3 H 6 > C 2 H 6 > C 2 H 2 > C 2 H 4 at 298 K. Modeling indicated that the wrinkles and Ca 2+ facilitated the full contact of C 3 H 6 and C 2 H 6 . Breakthrough experiments illustrated that FJI-Y9 could yield pure C 2 H 4 in a single step with a productivity of 0.78 mmol g −1 . In a lone adsorption/desorption cycle for MTO product separation, the productivities of C 3 H 6 and C 2 H 4 were 1.96 and 1.29 mol g −1 , standing as the highest recorded values.