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Ping Lu, Zhenhua Sun, Xinrong Ke, Changshen Ye, Zhixian Huang, Ting Qiu. Solvent-free Synthesis of Highly Dispersed Zinc-doped Porous Carbons as Efficient Dibenzothiophene Adsorbents. Green Energy&Environment. doi: 10.1016/j.gee.2024.09.010
Citation: Ping Lu, Zhenhua Sun, Xinrong Ke, Changshen Ye, Zhixian Huang, Ting Qiu. Solvent-free Synthesis of Highly Dispersed Zinc-doped Porous Carbons as Efficient Dibenzothiophene Adsorbents. Green Energy&Environment. doi: 10.1016/j.gee.2024.09.010

Solvent-free Synthesis of Highly Dispersed Zinc-doped Porous Carbons as Efficient Dibenzothiophene Adsorbents

doi: 10.1016/j.gee.2024.09.010
  • Designing efficient adsorbents for the deep removal of refractory dibenzothiophene (DBT) from fuel oil is vital for addressing environmental issues such as acid rain. Herein, zinc gluconate and urea-derived porous carbons SF-ZnNC-T (T represents the carbonization temperature) were synthesized without solvents. Through a temperature-controlled process of “melting the zinc gluconate and urea mixture, forming H-bonded polymers, and carbonizing the polymers,” the optimal carbon, SF-ZnNC-900, was obtained with a large surface area (2280 m2/g), highly dispersed Zn sites, and hierarchical pore structures. Consequently, SF-ZnNC-900 demonstrated significantly higher DBT adsorption capacity of 43.2 mg S/g, compared to just 4.3 mg S/g for the precursor. It also demonstrated good reusability, a fast adsorption rate, and the ability for ultra-deep desulfurization. The superior DBT adsorption performance resulted from the evaporation of residual zinc species, which generated abundant mesopores that facilitated DBT transformation, as well as the formation of Zn-N sites that strengthened the host-guest interaction (ΔE = -1.466 eV). The solvent-free synthesized highly dispersed Zn-doped carbon shows great potential for producing sulfur-free fuel oil and for designing metal-loaded carbon adsorbents.

     

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      沈阳化工大学材料科学与工程学院 沈阳 110142

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