近年来，随着机动车的增多，汽车尾气已成为主要的大气污染源，酸雨也因此更加频繁，严重危害到了建筑物、土壤和人类的生存环境。因此，世界各国纷纷提出了更高的油品质量标准，进一步限制油品中的硫含量、烯烃含量和苯含量，以更好地保护人类的生存空间。
In recent years, with the increase of motor vehicles, automobile exhaust has become the main source of air pollution, so acid rain is more frequent, seriously endangering buildings, soil and human living environment. Therefore, countries around the world have put forward higher oil quality standards to further limit the sulfur content, olefin content and benzene content in oil products, so as to better protect the living space of human beings.
随着对含硫原油加工量的增加及重油催化裂化的普及，油品含硫量超标及安定性不好的现象也越来越严重。由于加氢脱硫在资金及氢源上的限制，对中小型炼油厂来说进行非加氢精制的研究具有重要的意义。
With the increase of sulfur-containing crude oil processing and the popularization of heavy oil catalytic cracking, the phenomenon of over standard sulfur content and poor stability of oil is becoming more and more serious. Due to the limitation of hydrodesulfurization on capital and hydrogen source, it is of great significance for small and medium-sized refineries to study non hydrorefining.