Scholarlink

<p>A new oscillatory central packed-bed baffled reactor (OCPBBR) was developed for continuous oxidative desulfurization (ODS) of sour heavy oil under mild conditions. Composite magnetic catalysts were prepared by loading MnO₂ on activated carbon and reinforcing it with 1–3 wt% Fe<sub>2</sub>O<sub>3</sub>, followed by an alumina coating to improve stability. ODS performance was evaluated using catalysts Cat-1 to Cat-5 across temperatures of 30–90 °C, oscillatory Reynolds numbers (73–1168), net flow Reynolds numbers (34.87–8.74), and velocity ratios (2.1–133.6). The highest sulfur removal (99.6%) was achieved with Cat-4 (5% MnO₂–3% Fe<sub>2</sub>O<sub>3</sub>/AC) at 90 °C, St = 0.103, Reₒ = 1168, and Reₙ = 8.74. Results show that optimizing oscillatory hydrodynamics and temperature significantly enhances mixing and reaction rates. COMSOL Multiphysics simulations were used to analyze flow behavior and determine kinetic parameters. The maximum rate constants at 90 °C and Reₙ = 34.87 were <i>k</i> = 0.26–0.37 min⁻<sup>1</sup> across the catalyst series. The results demonstrate that optimized oscillatory hydrodynamics coupled with composite magnetic catalysts can significantly enhance oxidative desulfurization efficiency under the investigated operating conditions.</p>

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

Heavy fuel production using magnetic composite catalysts in an oscillatory packed-bed baffled reactor: integrated experimental and Multiphysics kinetic assessment

  • 期刊论文

  • 发表日期：

    2026年2月9日

查看全文
  • Jasim I. Humadi,
  • Wadood T. Mohammed

摘要

A new oscillatory central packed-bed baffled reactor (OCPBBR) was developed for continuous oxidative desulfurization (ODS) of sour heavy oil under mild conditions. Composite magnetic catalysts were prepared by loading MnO₂ on activated carbon and reinforcing it with 1–3 wt% Fe2O3, followed by an alumina coating to improve stability. ODS performance was evaluated using catalysts Cat-1 to Cat-5 across temperatures of 30–90 °C, oscillatory Reynolds numbers (73–1168), net flow Reynolds numbers (34.87–8.74), and velocity ratios (2.1–133.6). The highest sulfur removal (99.6%) was achieved with Cat-4 (5% MnO₂–3% Fe2O3/AC) at 90 °C, St = 0.103, Reₒ = 1168, and Reₙ = 8.74. Results show that optimizing oscillatory hydrodynamics and temperature significantly enhances mixing and reaction rates. COMSOL Multiphysics simulations were used to analyze flow behavior and determine kinetic parameters. The maximum rate constants at 90 °C and Reₙ = 34.87 were k = 0.26–0.37 min⁻1 across the catalyst series. The results demonstrate that optimized oscillatory hydrodynamics coupled with composite magnetic catalysts can significantly enhance oxidative desulfurization efficiency under the investigated operating conditions.