Excellent Mercury Removal in High Sulfur Atmosphere Using a Novel CuS-BDC-2D Derived by Metal-Organic Frame

Area of Science:

• Materials Science
• Environmental Chemistry
• Chemical Engineering

Background:

• Nonferrous smelting flue gases contain high concentrations of mercury, posing significant environmental risks.
• Existing mercury removal technologies struggle with high sulfur atmospheres characteristic of these emissions.
• Development of robust adsorbents is crucial for effective mercury emission control.

Purpose of the Study:

• To synthesize and evaluate a novel two-dimensional copper sulfide-metal-organic framework (CuS-BDC-2D) for mercury capture.
• To investigate the material's performance under high sulfur dioxide (SO2) conditions.
• To assess its potential for industrial applications in nonferrous smelting.

Main Methods:

• Synthesis of a two-dimensional CuS-MOF (CuS-BDC-2D) by anchoring sulfur to copper sites in a Cu-BDC MOF.
• Characterization of the material's structure, surface area, and thermal stability.
• Mercury (Hg0) capture experiments in simulated flue gas with varying SO2 concentrations.

Main Results:

• CuS-BDC-2D exhibits a layered floral structure with high specific surface area and thermal stability.
• The 2D material demonstrates significantly higher mercury capture capacity compared to CuS and 3D CuS-MOF.
• CuS-BDC-2D maintains high Hg0 removal efficiency even at SO2 concentrations up to 20,000 ppm.

Conclusions:

• The novel 2D CuS-BDC-2D material is highly effective for mercury removal in challenging high-sulfur industrial flue gas.
• Its superior performance and sulfur resistance make it a promising candidate for controlling mercury emissions.
• This work provides a pathway for designing advanced adsorbents for environmental mercury remediation.