Preparation and characterization of black garlic peels-derived activated carbon to improve H₂S adsorption at room-temperature

The carbon-based catalysts have been demonstrated as effective desulfurizers for treating H₂S emission problems at room temperature. Herein, the black garlic peel-based activated carbon catalysts (BGPACs) are prepared for H₂S desulfurization at room-temperature for the first time. Results demonstrate that the BGPACs exhibit excellent selectivity for desulfurization of H₂S and can be used as a promising catalyst for H₂S oxidation. The carbonization temperature of 800 ℃ is conducive to produce activated carbon with roomy specific surface area and capacious pore volume, which could offer more exposed reaction sites for desulfurization reaction. The breakthrough sulfur capacity of BGPACs prepared by a simple carbonization can reach a satisfied value of 0.21 g/g at room temperature. Besides, further characterizations and experiments are carried out to infer possible reaction mechanism for H₂S desulfurization. This work could offer crucial insights into the high performance for desulfurization at room temperature and thus provides an innovative approach for the efficient utilization of black garlic peel.