Quality of distillates from repeated recycle of residue
Quality of distillates from repeated recycle of residue
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DOI：
10.1021/ef010234j
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发表时间：
2002-03-01
期刊：
影响因子：
5.3
通讯作者：
Gray, MR
中科院分区：
文献类型：
--
作者：
Japanwala, S;Chung, KH;Gray, MR
The yields of gas, liquid, and coke from the coking of Athabasca vacuum residue were determined as a function of conversion of the residue. High conversion was achieved by subjecting the unconverted residue to repeated coking steps. The cumulative yield of liquid increased by 12% from stage I of coking, where 80% residue conversion was obtained, to stage 3 where over 97% cumulative residue conversion was obtained. The quality of the distillates obtained at each stage deteriorated based on the concentrations of nitrogen and polyaromatic hydrocarbons. Although coking reactions resulted in a significant decrease in the number of paraffinic chains, the average chain length remained constant. A mass balance showed that the aromatic carbon increased in the first coking step, then remained constant.
