Research progress on separation technology of diesel hydrocarbon components
With the continuous improvement of China's refining technology and the development and utilization of new energy sources,the fuel market is gradually saturated,and there is an obvious surplus of diesel.Converting diesel into oil through separation to achieve efficient and low-carbon separation of aromatic hydrocarbons/non-aromatic hydrocarbons in the components is an important way to achieve high-value utilization of diesel and alleviate the problem of excess.This article first explains the distribution pattern of diesel family composition in China,and proposes the differences in entry points for the separation of straight-run diesel and catalytically cracked diesel(FCC diesel).The separation technology of aromatics and paraffins in diesel is introduced in detail,such as solvent extraction,membrane separation,adsorption separation and urea dewaxing etc.The advantages and disadvantages of various separation techniques and their future research directions are discussed.Finally,the separation of aromatics and paraffins in diesel oil is summarized and prospected.