【摘要】 当催化剂颗粒在30—40目之间时,反应在动力学区域进行,在Pt/Al₂O₃催化剂上丙醇深度氧化的动力学方程服从丙醇及氧双分子吸附及二氧化碳产物吸附阻碍的L-H机理模型,当催化剂颗粒直径增大到4mm,厚2mm时,内扩散显著影响,实验上测得催化剂有效因子η值在1.31—0.75之间。用Euler常微分方程数值方法,计算出氧在催化剂孔内的压力分布。更多还原

【Abstract】 The deep oxidation of propanol ou Pt/Al₂O₃ takes place in the kinetic region for particle size of 30-40 mesh. A kinetic equation was derived from a Langmuir-Hinshelwood model of adsorption of propanol and oxygen with inhibition by carbon dioxide. When the size of catalvst particles reached 4mm in diameter and 2mm in thickness intraparticle diffusion strongly affected the rate of deep oxidation of propanol. The effectiveness factor of catalyst was determined to be in the range of 1.31-0.75. The partial pressure profile of oxygen in the pores of catalyst was calculated by integrating the differential equation by Euier’s method.更多还原