Research On Preheat Treatment With Different Catalysts For Oil Shale Pyrolysis

The gradual depletion of petroleum resources,low oil prices,and huge reserve,further,an anticipated increase in global energy,have consequently attracts a worldwide more and more attentions in recent years for utilization of oil shale,which is considered as a predominant alternative source for alleviating the pressure of petroleum supplies.In this study,the kinetic parameters of Huadian(HD)oil shale were evaluated with different catalysts(sodium hydroxide and sodium nitrate),metal chlorides(stannous chloride,molybdenum chloride,zinc chloride),and(potassium nitrate).Fourier transform infrared spectroscopy(FTIR),X-ray diffraction(XRD),Thermogravimetric analysis(TGA),gas chromatography–mass spectrometry(GC-MS),element analysis,and scanning electron microscopy were performed to characterize the shale oil and solid residues.Furthermore,the kinetic parameters(activation energy(E)and frequency factor(A))were calculated using the Coats-Redfern method.The results showed that the effect of addition of metal chlorides were greater than the effect of other catalytic in pyrolysis of oil shale.The activation energy of the samples treated with catalyst showing highest decreased.Compared to without catalyst in the preheat treatment.,particularly,in the presence of metal chlorides(SnCl2 ?MoCl5 and ZnCl2)catalysts,were decreased about 15.1 kJ mol-1,10.66 kJ mol-1,20.58 kJ mol-1respectively,Moreover,sodium nitrate and potassium nitrate was decreased about 7.26 kJ mol-1,and 4.98 kJ mol-1 respectively.This study opens a new and alternative approach for the treatment of oil shales at low temperature,as well as enhancing the utilization of Huadian oil shale to produce liquid and gas in the presence of catalysis.