Kinetics of coking shale oil vapour on combusted spent shale for eight Australian oil shale deposits

Abstract

Data are presented on the kinetics of coking at 500 °C of shale oil vapours on combusted spent shale (shale ash) prepared from samples of oil shales from the Condor, Duaringa, Lowmead, Nagoorin, Nagoorin South, Rundle, Stuart and Yaamba deposits. The results are correlated in an equation that gives the yields of carbon deposited on the shale ash as a function of reaction time and oil vapour concentration. Reaction coefficients that characterize the reactivities of the oils and ashes are given. Additional data that relate the yields of carbon to the other reaction products are also presented. On the bases of these data, recommendations are made for the selection of retort operating conditions to minimize oil yield losses due to coking.