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1The Soret and Dufour Effects in Non-thermal Equilibrium Packed Beds with Forced Convection and Endothermic Reactions*显示文摘To study the influence of the Soret and Dufour effects on the reactive characteristics of a porous packed bed with endothermic reactions and forced convection, a two-dimensional mathematical model considering the cross-diffusion effects was developed in accordance with the thermodynamics of irreversible processes and the local thermal non-equilibrium model. The simulation results were validated by comparing with experimental data. The influence of the Soret and Dufour effects on the heat transfer, mass transfer and endothermic chemical reaction in the non-thermal equilibrium packed bed is discussed. It was found that when the Peclet number reaches 1865, the maximum relative error of the concentration of gas product induced by the Soret effect is 34.7% and that of the solid fractional conversion caused by the Dufour effect is 10.8% at reaction time 160 s and initial temperature 1473 K. The differences induced by the Soret and Dufour effects are demonstrated numerically to increase gradually with the initial temperature of feeding gas and the Peclet number.李明春 赵中亮 静宇 刘家涛 吴玉胜 2013Chinese Journal of Chemical Engineering2013,21,8:1
2纳米金属Ti粉修饰电解磷化膜性能研究显示文摘利用电化学测试技术、扫描电子显微镜(SEM)和X射线衍射(XRD)仪对Ti粉修饰的电解磷化膜性能进行研究。结果表明,在电解磷化液中加入纳米金属Ti粉后,磷化晶粒由长条形结晶形貌且结晶颗粒尺寸不均转变为结晶颗粒大小均匀致密的片状结晶,制备得到的磷化膜交流阻抗明显增大,添加纳米金属Ti粉后,磷化膜腐蚀电流降低,耐CuSO4点滴腐蚀时间超过600s。牟世辉 郝建军 王崇蕊 刘新院 董春燕 2012稀有金属材料与工程2012,41,S2:0
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