Research On The Desulfurization Process Of High-sulfur Petroleum Coke

Petroleum coke is a major industrial raw material.The rapid development of the domestic petrochemical industry and the change of the quality of imported crude oil has caused great changes in the product structure of domestic petroleum coke.At present,the supply of domestic petroleum coke is out of balance.The production of high-sulfur petroleum coke is increasing,and the supply of low sulfur petroleum coke is seriously inadequate.The application of high-sulfur petroleum coke in aluminum electrolysis production has caused serious harm to the production and environment of aluminum electrolysis,and even the risk of shut-down and rectification.Therefore,the study of an effective desulfurization method is of immense significance to the sustainable and healthy development of carbon industry and metallurgical industry.On the basis of literature review and experiment.Find a method to calcinate desulfurization by adding manganese powder.The main research contents and conclusions are as follows.The desulfurization experiment of high-sulfur petroleum coke was studied by single factor experiment.,It is found that the smaller the petroleum coke size is,the better it is for the removal of sulfur in petroleum coke.In a certain range,the desulfurization rate increases with the increase of reaction temperature and reaction time;In a certain range,the desulfurization rate increases with the increase of manganese powder proportion and the increase of paraffin wax ratio,The desulfurization manganese powder can be returned to the desulfurization experiment.On the basis of single factor experiment,The research of four factors of petroleum coke desulfurization technology was carried out using software design-expert..The results demonstrate that the factors affect the desulfurization rate of petroleum coke as flows:manganese powder ratio>reaction temperature>reaction time>paraffin ratio.The interaction between reaction temperature and reaction time is evident,and the interaction of other factors is not significant.Obtain the simulated regression equation:Y=53.59+2.91X1+2.20X2+3.06X3+0.46X4-1.07X1X2-0.34X1X3+0.065X1X4-0.21X2X3-0.34X2X4-0.30X3X4-2.89X12-1.76X22-2.59X32-0.75X42The optimal conditions for the response surface optimization are obtained by experiment:the reaction temperature is 740?,reaction time is 100min,the ratio of manganese powder is 20:2.5,the ratio of Paraffin is20:2.In this condition,the sulfur content of petroleum coke with sulfur content of 3.47%is reduced to 1.58%,which is required by the brand YBYJJ-1.Using modern analytical means such as FTIR and EPMA,By means of modern analytical methods such as FTIR and EPMA,the organic sulfur structure of thiophene and thiol in desulfurized petroleum coke was destroyed to some extent.After desulphurization,the surface of manganese powder has sulfur elements.The experimental conditions have little effect on the microstructure of petroleum coke.After the reaction,Petroleum coke is bonded with manganese powder.Using ethanol steam instead of paraffin to be effectively solved,The volume ratio of ethanol vapor is approximately 98%,and its velocity is 0.5m/s.After the reaction,The sulfur content of petroleum coke decreased from 3.47%to 1.2%.