Abstract
In this paper, the basic principle and features of the process carried out in a Sanjiang(SJ)-type rectangular pilot-scale retort have been described. The suitability of the SJ retort for processing oil shale from Yaojie (YJ) county, Gansu province, China was investigated to find optimal condi- tions for an effective recovery of shale oil. The pyrolysis of lump YJ oil shale was carried out in the SJ pilot retort with a daily processing capacity of 24 tons of oil shale. It was found that the heat value of the pyrolysis gas pro- duced from YJ oil shale was sufficient to provide the heat needed for retort- ing. The pyrolysis temperature fluctuated between 550 and 700 o C, with an average of 610 o C. The results of the study demonstrate that the shale oil yield from YJ oil shale is high, accounting for about 85% vs. Fisher assay. The shale oil consists mainly of diesel and heavy fractions, and the spent shale is of high calorific value.
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