Scholarlink

<p>Hazardous wastes from the production of cleaner fuels, spent hydrodesulfurization (HDS) catalysts, pose a threat to the environment and the sustainability of rare metal resources. However, conventional recovery approaches are limited by long processes, easy generation of waste liquids, and difficult reuse of recovery products. Herein, a SiO<sub>2</sub>–Na<sub>2</sub>O–B<sub>2</sub>O<sub>3</sub>–MgO–TiO<sub>2</sub> glass phase extraction system was proposed for the full-component recycle from spent MoNi/γ-Al<sub>2</sub>O<sub>3</sub> catalysts to the materials, including the individual recovery of Mo and the synthesis of Ni<sup>2+</sup>-doped glass–ceramics. 96.7% of Ni and 99.8% of Al were extracted into the loaded glass in one step, while 95.3% of Mo was precipitated as molybdate and directly recovered with high separation factors (SF<sub>Mo/Ni</sub> 594.8, SF<sub>Mo/Al</sub> 8718.2) in one step. Moreover, the broadband near-infrared luminescence (1150 − 1700&#xa0;nm) of glass–ceramics was triggered by Ni<sup>2+</sup> in the octahedral crystal structure of Me<sub>3</sub>O<sub>5</sub> (Me = Mg, Al, Ti) by melting-annealing-crystallization processes, which provided it the potential to be applied in tunable lasers and broadband optical amplifiers for the wavelength-division-multiplexing transmission systems. The Ni<sup>2+</sup>-doping mechanism was calculated using molecular dynamics simulations. This work emphasized the maximization of the reuse value for each metal resource from hazardous wastes while reducing the burden on the environment and achieving the recycling of rare metal resources with re-valorization.</p> Graphical abstract

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Full-component recycling with re-valorization from spent hydrodesulfurization catalyst: recovery of molybdates and synthesis of Ni2+ doped glass–ceramic

  • 期刊论文

  • 发表日期：

    2025年2月28日

查看全文
  • Yuan-Yuan Cai,
  • Zuo-Ren Nie,
  • Xiao-Li Xi,
  • Zhi-Yong Zhao,
  • Ying-Liang Tian

摘要

Hazardous wastes from the production of cleaner fuels, spent hydrodesulfurization (HDS) catalysts, pose a threat to the environment and the sustainability of rare metal resources. However, conventional recovery approaches are limited by long processes, easy generation of waste liquids, and difficult reuse of recovery products. Herein, a SiO2–Na2O–B2O3–MgO–TiO2 glass phase extraction system was proposed for the full-component recycle from spent MoNi/γ-Al2O3 catalysts to the materials, including the individual recovery of Mo and the synthesis of Ni2+-doped glass–ceramics. 96.7% of Ni and 99.8% of Al were extracted into the loaded glass in one step, while 95.3% of Mo was precipitated as molybdate and directly recovered with high separation factors (SFMo/Ni 594.8, SFMo/Al 8718.2) in one step. Moreover, the broadband near-infrared luminescence (1150 − 1700 nm) of glass–ceramics was triggered by Ni2+ in the octahedral crystal structure of Me3O5 (Me = Mg, Al, Ti) by melting-annealing-crystallization processes, which provided it the potential to be applied in tunable lasers and broadband optical amplifiers for the wavelength-division-multiplexing transmission systems. The Ni2+-doping mechanism was calculated using molecular dynamics simulations. This work emphasized the maximization of the reuse value for each metal resource from hazardous wastes while reducing the burden on the environment and achieving the recycling of rare metal resources with re-valorization.

Graphical abstract