Study On Process And Property Of Modification Of Petroleum Asphalt With Direct Coal Liquefaction Residue

"Rich coal,poor oil and less gas" is a significant feature of Chinese resource distribution.In order to reverse the contradiction between the supply and demand of petroleum resources and improve the environmental problems caused by traditional coal chemical industry,it was born as the application of coal liquefaction technology in the new coal chemical industry.Direct coal liquefaction residue(DCLR)is an important by-product produced in the coal liquefaction process,accounting for about 30% of the coal liquefaction products.The efficient application of the residue can improve the economic benefits of the coal liquefaction process.In recent years,through structural analysis of the residue,it has been found that the residue contains many potential components that can improve the performance of road asphalt.Therefore,the study of DCLR modified asphalt has great practical significance.This article explores the regular changes of the road performance of DCLR modified asphalt under different process conditions and the structural performance changes related to the modification process,and establishes a basic research for the promotion of the residue modified asphalt entity project.The main contents are as follows:(1)In this paper,DCLR is selected to modify petroleum asphalt.From the perspective of DCLR,the effects of DCLR particle size and addition ratio on the softening point,penetration,ductility,and anti-aging performance of modified asphalt are studied.From the process conditions of DCLR modified asphalt,the modified asphalt are studied in the different modification temperature and the different modification time.The results show that the addition of DCLR effectively improves the high temperature stability and hardness of petroleum asphalt.At the same time,the addition of DCLR improves the anti-aging performance of modified asphalt.(2)By exploring the changing laws of multiple sets of experimental data,this paper draws a theoretical model of the performance changes of DCLR modified asphalt under multiple factors.The results show that the accuracy of the theoretical model obtained by simulation is higher through experimental verification,and it is very effective in actual engineering.The application has certain reference value.(3)This article analyzes the modification characteristics between DCLR and petroleum asphalt by using several characterization methods,starting from the changes of modified asphalt components and functional groups.The results show that the various components of the asphalt have an important impact on the performance.At the same time,each component must reach a certain amount to maintain the stability of the asphalt colloid structure and improve the performance of the asphalt.The infrared analysis shows that the group composition of DCLR contains functional groups similar to petroleum asphalt,and this part of the structure promotes better compatibility,the thermogravimetric analysis shows that modified asphalt contains more high-temperature resistant substances than base asphalt.