Abstract:

The Influence of different feed oils(Tahe vacuum residue, FCC slurry oil and hydrogenated FCC slurry oil) on oil-coal co-processing was investigated in a pilot plant. The results show that it is difficult to conduct the coprocessing reaction under severe conditions for mixture of Tahe vacuum residue and coal. The coke yield is up to 5.49% when the conversion of >524 ℃ fraction reaches 62.24%, and that additon of FCC slurry could promote the conversion of ＞524 ℃ in the mixture at higher reaction temperature. Under even higher reaction temperature, the cracking rate of ＞524 ℃ fraction in the oil-coal slurry can reach to 83.58% and the coke formation be effectively controlled to 2.31% when the pre-hydrogenated FCC slurry is added. The pilot plant results showed that coal powder and residue can convert into liquids simultaneously using the mixture of vacuum residue, FCC slurry oil and coal powder as feed.

Key words: oil and coal co-processing, feed oil, hydro-pyrolysis