基于V-Fe的催化剂在二二二烯氧化过程中的性能
Uriel Chacon-Argaez1, Marco A Alvarez-Amparán1, Luis Cedeño-Caero1
1UNICAT, Departamento de Ingeniería Química, Facultad de Química, Universidad Nacional Autónoma de México, Ciudad de México, 04510, Mexico.
Chemosphere
|July 7, 2024
概括
用铁改性氧化物催化剂显著增强柴油燃料的氧化脱硫. 这些催化剂在温和条件下实现超低硫含量,为燃料净化提供了更绿色的替代方案.
科学领域:
- 材料科学 材料科学 材料科学
- 催化剂是一种催化剂.
- 环境化学环境化学
背景情况:
- 柴油燃料含有硫化合物,如二二烯 (DBT),导致污染.
- 氧化脱硫 (ODS) 是一个有前途的方法来去除这些硫化合物.
- 氧化瓦纳 (VOx) 催化剂在氧化上对ODS是有效的,但它们的性能可以得到改善.
研究的目的:
- 为氧化脱硫而合成和特征化基上的基于V-Fe的新型催化剂.
- 评估这些材料在氧化脱硫 (ODS) 和光催化ODS (PODS) 过程中的催化性能.
- 了解铁 (Fe) 在增强VOx/Al2O3催化剂的催化活性和特性中的作用.
主要方法:
- 合成基于V-Fe的催化剂,通过将甲酸浸在Fe修饰的上.
- 使用诸如SEM-EDS,TPR,XRD,Raman,ATR-FTIR,光发光,UV-Vis扩散反射和XPS等技术进行表征.
- 用DBT,4-甲基DBT和4,6-二甲基DBT作为模型污染物评估ODS和PODS反应中的催化性能.
主要成果:
- V-Fe催化剂显著增强了ODS活性,比没有Fe的V催化剂高7.5倍.
- 最活跃的催化剂 (V5Fer) 在50分钟内实现了4,6-二甲基DBT的氧化.
- 铁的加入改善了催化剂的光学特性,减少了带隙能量和电子孔重组,这对PODS至关重要.
结论:
- 铁显著促进VOx/Al2O3的催化活性,无论是ODS还是PODS.
- 增强的性能归因于Fe-VOx相互作用,有利于活性V物种和改进的光学特性.
- 基于V-Fe的催化剂在温和,环保的条件下有效生产超低硫燃料.
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