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Hydrogen peroxide-assisted oxidative desulfurization: mechanisms and catalytic perspectives
Ali Ali-Zade1, Elmir Babayev2, Irina Tarkhanova3
1Azerbaijan State Oil and Industry University, Baku, Azerbaijan.
Frontiers in Chemistry
|August 7, 2026
Summary
Hydrogen peroxide-based Oxidative Desulfurization (ODS) offers an efficient, eco-friendly method for removing sulfur from fuels. This approach uses catalysts to activate hydrogen peroxide, producing reactive oxygen species for superior desulfurization under mild conditions.
Area of Science:
- Environmental Chemistry
- Catalysis
- Petroleum Refining
Background:
- Increasing environmental concerns and stringent fuel regulations drive demand for advanced desulfurization technologies.
- Conventional Hydrodesulfurization (HDS) faces limitations with refractory sulfur compounds and harsh conditions.
- Oxidative Desulfurization (ODS) presents a viable alternative or complement to HDS, offering milder conditions and better efficiency.
Purpose of the Study:
- To review the mechanistic insights of hydrogen peroxide (H2O2)-based Oxidative Desulfurization (ODS).
- To highlight the role of various catalytic systems in activating H2O2 for sulfur compound oxidation.
- To underscore the potential of H2O2-assisted ODS for sustainable ultra-low sulfur fuel production.
Main Methods:
- Review of mechanistic pathways for H2O2 activation in ODS.
- Analysis of catalytic systems including organic acids, POMs, ILs, DESs, transition metal oxides, and MOFs.
- Investigation of reactive oxygen species (ROS) generation and their role in sulfur oxidation.
Main Results:
- H2O2 activation is crucial for generating ROS, particularly hydroxyl radicals (•OH).
- ROS effectively oxidize organic sulfur compounds to polar sulfoxides and sulfones.
- Various catalysts significantly enhance H2O2 activation and oxidation efficiency.
- Development of efficient and reusable catalytic systems operating under mild conditions.
Conclusions:
- H2O2-based ODS is a promising technology for producing ultra-low sulfur fuels.
- Catalyst design is key to optimizing H2O2 activation and desulfurization performance.
- This sustainable pathway addresses environmental regulations and fuel quality demands.
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