Catalytic diesel is a kind of inferior diesel, which is mainly reflected in the high content of impurities such as sulfur and nitrogen, high density, low cetane number, and poor engine ignition performance. It is an extremely difficult diesel raw material to process.The high content of aromatic hydrocarbons in catalytic diesel fuel is the root cause of its poor quality. Its total aromatic hydrocarbon content is as high as 70%, of which polycyclic aromatic hydrocarbons account for more than 50% of the total aromatic hydrocarbons. It is difficult to meet the increasingly stringent environmental protection regulations using conventional hydrogenation technology.
In order to further improve the utilization efficiency of catalytic diesel, Sinopec (Dalian) Research Institute of Petrochemical Industry Co., Ltd. (FRIPP, referred to as "Dalian Institute"),
actively carry out research work on catalytic diesel hydroconversion with high aromatic content.For catalytic diesel with high aromatic content, based on the concept of aromatics utilization, and relying on Sinopec's own hydrogenation technology and hydrogenation catalyst system, a proprietary FD2A process technology has been developed.Converting the polycyclic aromatic hydrocarbons in the catalytic diesel oil into monocyclic aromatic hydrocarbons can achieve the purpose of effectively utilizing the aromatic hydrocarbons in the catalytic diesel oil.