Study On Preparation And Performance Of Supported Catalyst For The Oxidation Desulfurization

Sulfur compounds in fuel oil are converted to SO_X during combustion,lead to environmental pollution.Various countries in the world have modified laws and regulations to limit the concentration of sulfides in fuel oil.At present,the main desulfurization method is hydrodesulfurization?HDS?,however,the operation condition of hydrodesulfurization is harsh,and aromatic sulfide difficultly to remove aromatic sulfide.Therefore,non-hydrodesulfurization has attracted more an more attention.Oxidative,desulfurization has attracted extensively from researchers because of reaction conditions and high desulfurization effective.Three loading-catalysts were synthesized in the experiment.The removed effect of DBT with three catatysts were investigated in the oxidative desulfurization experiment,the oxidation desulfurization mechanism was researched too.The contents of this text follows as:MoO₃/MIL-101 was synthesized by a simple calcination method and used as catalyst in the oxidative desulfurization?ODS?.The structure of MoO₃/MIL-101were characterized using XRD,FT-IR,BET,SEM,EDS,and TGA.In the experiment,MoO₃/MIL-101complex was used as the catalyst for the oxidative desulfurization reaction system,and the catalytic oxidation of DBT in the model oil was studied.The preparation methods of catalysts and the effects of various experimental conditions on the desulfurization efficiency were investigated.The mechanism of oxidative desulfurization was also analyzed.A highly active and loading catalyst of H₂WO₄/MIL-101nanoparticles was synthesized by hydrothermal method,and used in the oxidative desulfurization?ODS?.The structure of H₂WO₄/MIL-101 were characterized using XRD,FT-IR,BET,SEM and EDS.In the experiment,H₂WO₄/MIL-101complex was used as the catalyst for the oxidative desulfurization reaction system,and the catalytic oxidation of DBT in the model oil was studied.The preparation methods of catalysts and the effects of various experimental conditions on the desulfurization efficiency were investigated.The experiment results show that the catalyst has the advantages of high stability and easy recovery.The mechanism of oxidative desulfurization in the oxidzation was also investigated.A high active rod-like was H₂WO₄/GO synthesized by a hydrothermal method.XRD,FT-IR,SEM,EDS and BET were used to characterize the morphology and structure of H₂WO₄/GO.The preparation methods of catalysts and the effects of various experimental conditions on the desulfurization efficiency were investigated.The results showed that H₂WO₄/GO had good catalytic stability,and the catalytic activity was not significantly reduced after 3 times.The mechanism of H₂WO₄/GO catalytic oxidation desulfurization was discussed in detail.