A novel IL/MOF nanocomposite tailored for trace SO2 efficient capture
based on synergistic effects
Abstract
Due to its toxicity and corrosiveness, it is of enormous significance to
efficiently capture and recover sulfur dioxide (SO2) from flue gas and
natural gas. Herein, a new type of IL/MIL-0.7 composite was precisely
designed to meet this challenge, which exhibits a high adsorption
capacity for SO2 (13.17 mmol·g-1) at 298 K and 1 bar while excludes
almost completely carbon dioxide (CO2) (0.27 mmol·g-1) and nitrogen (N2)
(0.07 mmol·g-1). The high IAST selectivity (at least 11925) of
IL/MIL-0.7 for SO2/CO2 can be achieved within the whole test pressure
range. In addition, the breakthrough experiment also confirmed the
excellent performance of the composite for deep removal of 2000 ppm SO2.
Furthermore, the IL/MIL-0.7 composites can maintain excellent
performance after four adsorption and desorption circulations and the
thermostability can up to ~450 K. Therefore, this stable
IL@MOF composite has the potential application as an effective adsorbent
for SO2 removal from flue gas.