Study On Oxidative Desulfurization Performance Of Low-melting Solvent Supported Catalyst

With the development of science and technology and the improvement of people's living standard,automobile has become a substitute tool for general families.However,the combustion of gasoline and diesel fuel,which are used as power materials for automobiles,releases a lot of harmful gases to pollute the environment.Sulfide released from fuel is the main source of environmental pollution.Acidic gases released by sulfide combustion cause environmental pollution,endanger human health and corrode equipment.Therefore,it is necessary to reduce sulfide in fuel oil.Therefore,it is necessary to reduce sulfide in fuel oil.The supported low eutectic solvent catalyst has the advantages of uniform distribution of active ingredients,high catalytic activity and easy separation,recovery and no need to add extractant.Therefore,as a catalyst for oxidative desulfurization,it can efficiently remove sulfides from fuel oil and avoid adding other extractants.The catalyst can be reused,thus reducing the use of chemical reagents and environmental pollution.In this work,the acidic eutectic solvent was loaded onto alumina and silica by impregnation and one-step synthesis,and its oxidative desulfurization performance was tested.The eutectic solvent C₈H₁₆O₂-ZnCl₂ was synthesized by stirring method.and the supported catalyst of DESs loaded on Al₂O₃ by impregnation method.The supported catalyst structure was characterized by various analytical instruments.In the optimal conditions:m?catalyst?=0.5 g,O/S=6,T=60?,t=3 h,C₈H₁₆O₂-ZnCl₂/Al₂O₃ as catalysis,the desulfurization experiment of sulfide in simulated oil is 99.2%.The 8%-C₈H₁₆O₂-ZnCl₂/SiO₂ supported catalyst was synthesized in one-step.The supported catalyst structure was characterized using a variety of analytical instruments.Under the optimal reaction conditions:O/S=6,m?catalyst?=0.20 g,T=80?,t=3 h,8%-C₈H₁₆O₂-ZnCl₂/SiO₂ is used to remove the sulfide in the simulated oil.The desulfurization rates of DBT and4,6-DMDBT were 95.6%and 95.2%.The 8%-C₅H₉NO₂-TsOH/SiO₂ supported catalyst was synthesized in one-step.The structure and properties of the catalyst were analyzed using a series of characterizations.Under the optimal conditions:O/S=6,m?catalyst?=0.20 g,T=70?,t=3 h,removal rate of dibenzothiophene in simulated oil is 97%in the desulfurization system.