Abstract
AbstractThe practical application of membrane separation, such as CO2 recovery from flue gas, is usually accompanied by harsh operating conditions of high temperature and pressure as well as acidic and humid feed properties, which poses a great challenge to the stability of membrane materials. In this work, zirconium phosphate material with highly stable porous‐framework structure was synthesized by ionothermal method, and then, its incorporation into the polymer matrix to prepare ZrPOF‐Pebax mixed‐matrix membranes (MMMs) was pioneered. Benefiting from their 4.0 × 3.0 Å 7‐ring windows and CO2‐philic framework, the optimal MMMs with a 5 wt % ZrPOF content exhibited enhanced CO2/N2 selectivity of 29.6, with a decent CO2 permeability of 286.3 Barrer, which raised by 79.4 and 67.5% compared to the neat Pebax 2533 membranes, respectively. Furthermore, owing to their excellent thermal, water, and chemical stability, obtained MMMs maintained excellent performances under harsh operating conditions.
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