The kinetics of Athabasca bitumen derived heavy gas oil over NiMo/Al2O3 catalysts were studied in a JQ-II high-pressure microscale hydrotreator unit under different operation conditions, including temperature, pressur...The kinetics of Athabasca bitumen derived heavy gas oil over NiMo/Al2O3 catalysts were studied in a JQ-II high-pressure microscale hydrotreator unit under different operation conditions, including temperature, pressure, H/O ratio and LHSV. The multi-parameter models of hydrodesulfurization and hydrodenitrogenation were proposed. The model parameters verify that the HDS and HDN reactions follow 1.5-order and 1.6-order kinetic rules, respectively. The kinetic activation energies of HDN and HDS over Com, Hom1 and Hom2 show that homemade catalysts exhibit higher activities in HDN than commercial catalyst. Using the multi-parameter kinetic model to predict the contents of sulfur and nitrogen in products is in good agreement with the experimental data.展开更多
Transition metal molybdenum phosphides were prepared by direct reduction of an amorphous phosphate precursor in hydrogen at relatively low temperature (650 ℃). XRD (X ray diffraction analysis) measurements showed tha...Transition metal molybdenum phosphides were prepared by direct reduction of an amorphous phosphate precursor in hydrogen at relatively low temperature (650 ℃). XRD (X ray diffraction analysis) measurements showed that pure molybdenum phosphide formed after the reduction with H 2. The reactivity was determined in a continuous flow microreactor at a H 2 pressure of 3.0 MPa. A sample of prepared molybdenum phosphide catalyst diluted with γ Al 2O 3 (20% phosphate precursor) was used for simultaneous HDN (Hydrodenitrogenation), HDS (Hydrodesulfurization) and HDY(Hydrogenation of aromatics). The influences of space velocity, flow rate of hydrogen, reaction time and temperature on hydrotreating performance were studied. Pyridine, thiophene and cyclohexene were used as model compounds, their contents were respectively 5%, 5% and 20%. Cyclohexane was used as the solvent.展开更多
基金National Natural Science Foundation of China(20406012) and CNPC program(04A5050102 and 05E7019).
文摘The kinetics of Athabasca bitumen derived heavy gas oil over NiMo/Al2O3 catalysts were studied in a JQ-II high-pressure microscale hydrotreator unit under different operation conditions, including temperature, pressure, H/O ratio and LHSV. The multi-parameter models of hydrodesulfurization and hydrodenitrogenation were proposed. The model parameters verify that the HDS and HDN reactions follow 1.5-order and 1.6-order kinetic rules, respectively. The kinetic activation energies of HDN and HDS over Com, Hom1 and Hom2 show that homemade catalysts exhibit higher activities in HDN than commercial catalyst. Using the multi-parameter kinetic model to predict the contents of sulfur and nitrogen in products is in good agreement with the experimental data.
文摘Transition metal molybdenum phosphides were prepared by direct reduction of an amorphous phosphate precursor in hydrogen at relatively low temperature (650 ℃). XRD (X ray diffraction analysis) measurements showed that pure molybdenum phosphide formed after the reduction with H 2. The reactivity was determined in a continuous flow microreactor at a H 2 pressure of 3.0 MPa. A sample of prepared molybdenum phosphide catalyst diluted with γ Al 2O 3 (20% phosphate precursor) was used for simultaneous HDN (Hydrodenitrogenation), HDS (Hydrodesulfurization) and HDY(Hydrogenation of aromatics). The influences of space velocity, flow rate of hydrogen, reaction time and temperature on hydrotreating performance were studied. Pyridine, thiophene and cyclohexene were used as model compounds, their contents were respectively 5%, 5% and 20%. Cyclohexane was used as the solvent.
