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在氧化脱硫过程中控制产品选择性,使用电沉积氧化铁膜

Victoria Kompanijec¹, Gil M Repa², Lisa A Fredin²

¹Binghamton University, 4400 Vestal Pkwy E Vestal, NY 13850, USA. jswierk@binghamton.edu.

Dalton transactions (Cambridge, England : 2003)

|June 28, 2023

概括

使用氧化铁膜的电化学氧化脱硫 (ODS) 有效地从燃料油中去除硫. 这项研究强调了氧化铁.

科学领域:

电化学电化学电化学
材料科学材料科学材料科学
催化剂是一种催化剂.

背景情况:

由于环境和运营原因,燃料油中的硫化合物需要去除.
传统的脱硫方法可能耗费大量能源.
电化学氧化脱硫 (ODS) 提供了一个有前途的,节能的替代方案.

研究的目的:

研究电沉积氧化铁薄膜 (FeO(OH)) 作为电化学氧化脱硫 (ODS) 的催化剂.
了解氧化二二二烯 (DBT) 中氧化氧化铁氧化物薄膜的催化行为和选择性.
阐明ODS期间氧化铁膜的形态变化的作用.

主要方法:

电化学氧化脱硫 (ODS) 使用电沉积氧化铁膜.
铁氧化物薄膜在ODS之前和之后的表征.
密度函数理论 (DFT) 计算以建模吸附和氧化机制.

主要成果:

氧化铁薄膜显示了二二二烯 (DBT) 选择性氧化到DBT硫氧化物 (DBTO).
观察到从 γ-FeOOH 到 γ-Fe2O3 的形态转变,与增加的 ODS 活性相关.
与黄金相比,DFT的计算表明DBT在氧化铁上的吸附能力较弱,有利于氧化而不是二元化.

结论:

电沉积氧化铁薄膜是ODS的有效催化剂,与传统方法相比具有优势.
γ-Fe2O3阶段对于有效的DBT氧化至关重要,由从单酸到双酸结合的过渡促进.
氧化铁薄膜为燃料油脱硫提供了一种选择性且可能更节能的途径.

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