【摘要】 <正> 浸渍型催化剂在近代工业催化剂开发中的地位日益重要.根据反应的特点,可以对催化剂活性组分的分布提出特定的要求.目前在工艺上已有一些方法可制备活性组分符合不同分布规律的催化剂.如所谓的蛋壳型,蛋白型及蛋黄型. Maatman等首先提出了设计和控制浸渍参数以制备具有预期活性组分分布的催化剂的观点.更多还原

【Abstract】 The single component impregnation model with finite rate adsorption and negligibly small diffusional transport of solute suggested by Lee and Aris is quoted to simulate the impregnation process of nickel nitrate solution on γ-Al2O3 pellets. The said model is solved by finite element orthogonal collocation method successfully. The parameters, such as equilibrium constant and rate constant of adsorption as well as surface saturated concentration, are calculated, and their effects on the concentration profile are discussed. The measured concentration profile of a supported catalyst prepared by impregnation with 2.4 M nickel nitrate solution coincides with the profile calculated.更多还原