Mixed matrix membrane contactor containing core-shell hierarchical Cu@4A filler for efficient SO₂ capture

Area of Science:

• Materials Science
• Chemical Engineering
• Environmental Science

Background:

• High flux membrane contactors are crucial for efficient hazardous gas removal.
• Poly(vinylidene fluoride) (PVDF)-based mixed matrix membrane contactors (MMMCs) offer potential for gas separation applications.

Purpose of the Study:

• To develop and characterize a novel PVDF-based MMMC incorporating a core-shell hierarchical Cu@4A composite filler.
• To investigate the impact of the Cu@4A filler on SO2 absorption flux and removal efficiency.

Main Methods:

• Preparation of PVDF-based MMMC with varying concentrations of Cu@4A composite filler.
• Evaluation of SO2 absorption flux and removal efficiency using membrane contactor setups.
• Analysis of physical and chemical SO2 transport mechanisms influenced by the Cu@4A filler.

Main Results:

• The Cu@4A loaded MMMC demonstrated enhanced SO2 removal efficiency and absorption flux compared to the control PVDF membrane.
• The M10^40 MMMC (40 wt% Cu@4A, 10 wt% PVDF) achieved the highest SO2 removal efficiency (73.6%) and absorption flux (9.1 × 10^-4 mol·m^-2·s^-1).
• Cu@4A filler regulated membrane structure, enhanced gas permeation, and increased SO2 facilitated transport sites.

Conclusions:

• The developed Cu@4A loaded MMMC is highly effective for hazardous gas removal, specifically SO2.
• The core-shell hierarchical Cu@4A filler significantly improves both physical and chemical SO2 absorption.
• This MMMC technology presents a promising advancement for industrial gas treatment and environmental protection.