从乙烯焦油生产针状焦的研究

STUDY ON PRODUCTION OF NEEDLE COKE FROM ETHYLENE TAR

比较了三种典型重质油(FCC澄清油、乙烯焦油、减压渣油)在不同热转化反应条件下的反应特征,研究了原料油组成结构特点与热转化反应产物光学组织结构之间的关系;探讨了乙烯焦油不适宜直接作为针状焦生产原料的原因。根据研究结果,提出了由乙烯焦油生产针状焦的原料预处理方法及适宜的工艺操作条件,并进行了焦化实验验证,得到了低热膨胀系数的针状焦产品。

The reaction characteristics of three typical heavy feedstocks, namely FCC decant oil (FCCDO), ethylene tar (ET) and vacuum residue (VR), all obtained from the processing of Liaohe crude oil under different carbonization conditions were compared. The relationship between the compositional features of feedstocks and the optical properties of the semi-coke formed during carbonization was investigated, and the reason why ET cannot be used directly to produce needle coke were discussed. As a result, a preliminary treatment step for ET was suggested. Coking experiments have verified that needle coke with low thermal expansion coefficient can be obtained from ET after preliminary treatment and under proper coking conditions.