Effective CO

Area of Science:

• Environmental Science
• Materials Science
• Chemical Engineering

Background:

• Rational disposal of antibiotic fermentation residues is crucial for environmental protection.
• Developing efficient carbon capture materials from waste products is an active research area.

Purpose of the Study:

• To transform oxytetracycline fermentation residue into a nitrogen-doped nanoporous carbon material.
• To evaluate the material's performance for carbon dioxide (CO2) capture.

Main Methods:

• Low-temperature pyrolysis pre-carbonization of oxytetracycline residue.
• Pyrolytic activation using KOH under mild conditions (600 °C, KOH/OC = 2).
• Characterization of the resulting carbon material and assessment of CO2 adsorption capacity and selectivity.

Main Results:

• Optimized activation conditions enhanced microporosity and retained in-situ nitrogen content.
• The nitrogen-doped nanoporous carbon exhibited high CO2 adsorption (4.38 mmol g⁻¹ at 25 °C, 6.40 mmol g⁻¹ at 0 °C).
• The material demonstrated excellent CO2/N2 selectivity (32/1) and reusability (4% decrease after 5 cycles).

Conclusions:

• Oxytetracycline fermentation residue can be effectively converted into N-doped nanoporous carbon for CO2 capture.
• The material's properties, including microporosity and nitrogen doping, enhance CO2 adsorption.
• This approach offers a sustainable pathway for waste valorization and carbon capture technology.