Search results for "Retort"
showing 2 items of 2 documents
Cr(VI)/Cr(III) and As(V)/As(III) Ratio Assessments in Jordanian Spent Oil Shale Produced by Aerobic Combustion and Anaerobic Pyrolysis
2011
With the increase in the awareness of the public in the environmental impact of oil shale utilization, it is of interest to reveal the mobility of potentially toxic trace elements in spent oil shale. Therefore, the Cr and As oxidation state in a representative Jordanian oil shale sample from the El-Lajjoun area were investigated upon different lab-scale furnace treatments. The anaerobic pyrolysis was performed in a retort flushed by nitrogen gas at temperatures in between 600 and 800 °C (pyrolytic oil shale, POS). The aerobic combustion was simply performed in porcelain cups heated in a muffle furnace for 4 h at temperatures in between 700 and 1000 °C (burned oil shale, BOS). The high loss-…
Mobility of Cr and V in Spent Oil Shale: Impact of Thermal Treatment
2013
Abstract Spent oil shale samples were evaluated for potential chromium and vanadium release upon aerobic combustion used in power generation, or anaerobic retorting used in shale oil recovery. Combusted samples released more Cr than retorted or raw samples due to chromate formation. The behavior of vanadium was just opposite in that more V was released from retorted than from aerobically combusted samples, probably due to reduced vanadyl cation formation.