Abstract
The production of green fuel oil is of the utmost importance for maintaining a healthy life and environment in the current world. Effective and complete removal of sulfur refractory compounds (such as 4,6-dimethyldibenzothiophene and other alkyl-substituted thiophene derivatives) from fuel oil is essential to meet the new requirements of sulfur standards. Several techniques have been proposed for desulfurization of fuel oil, such as hydrodesulfurization (HDS), selective adsorption, extractive distillation, biodesulfurization, and oxidative desulfurization (ODS). The removal of sulfur by the HDS process requires higher investment costs, high reaction temperature (up to 400 °C), and high pressure (up to 100 atm) reactors. On the other hand, studies have shown that the ODS process is remarkably successful in the removal of sulfur under mild reaction conditions. This review article presents a comparative analysis of various existing catalytic oxidation techniques: acetic acid/formic acid catalytic oxidation, heteropolyacid (HPA) catalytic oxidation, ionic liquid catalytic oxidation, molecular sieve catalytic oxidation, polyoxometalates catalytic oxidation, titanium catalytic oxidation, and ultrasound-assisted oxidation systems, as well as discusses research gaps, and proposes important recommendations for future challenges.
Highlights
The removal of sulfur from transportation fuel and petrochemicals is gaining more attention due to the increased awareness of the adverse effects of burning sulfur containing oils on human health and the environment [1]
The primary primary aim this review review article article is is to to provide provide aa comparative comparative analysis analysis of of all all the the existing existing catalytic oxidation systems applied in the oxidation desulfurization method, and evaluate catalytic oxidation systems applied in the oxidation desulfurization method, and evaluate the the difficulties arising in inthe theprocess
Li et al studied the oxidative desulfurization of model fuel oil using macroporous supported heteropolyacids
Summary
The removal of sulfur from transportation fuel and petrochemicals is gaining more attention due to the increased awareness of the adverse effects of burning sulfur containing oils on human health and the environment [1]. Amongst all the aforementioned alternative desulfurization reactionthe conditions (low temperature and pressure) and higher selectivity in removingdue aromatic methods, ODS process has received a lot of attention as a promising technique to its mild methods, the ODScompared process has received a lot of attention as a promising technique dueexpensive to its mild sulfur compounds to the process. It does not require reaction conditions and higher selectivity in removing aromatic reaction [19,20,21,22]. This review proposes recommendations for the successful production of green fuel oils
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