Preparation and characterization of an amino‐cellulose (AC) derivative for development of thin‐film composite membrane for CO 2 /CH 4 separation

This article reports the synthesis of a new amino‐cellulose (AC) derivative. The prepared AC has tertiary amino as well as triazole groups which are basic and able to act as good carriers for facilitated transportation of CO 2 . The prepared AC was characterized by FT‐IR and H‐NMR spectroscopy and used as a carrier of CO 2 in blend with poly(vinyl alcohol) (PVA). The blends of AC‐PAV were prepared at different mass fractions and cast on a commercial polysulfone (PS) ultrafiltration membrane as support. Prepared AC‐PVA/PS thin film composite membranes (TFC) were applied as facilitated transport membranes for efficient separation of CO 2 from CH 4 in a gas mixture at different operating conditions. Here, we investigated the effect of CA mass fraction, feed pressure, and feed temperature on the CO 2 permeance, CH 4 permeance, and CO 2 /CH 4 selectivity of prepared AC‐PVA/PS thin composite membranes.