The combination of subcritical water and catalyst was proposed for oil shale extraction. extraction Huadian in FeCl2 solution performed at 350 °C to evaluate the combined method. At 20 h, a high yield bitumen 1 (the discharged from matrix) obtained with an optimal concentration 0.08 mol/L, which 50.5% higher than that pure water. reached maximum 18.98 wt% 40 h 19.14 70 water, respectively. time...