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浸渍型催化剂同于在其制制备过程中存在着吸附与扩散作用,使活性组份存在着从颗粒外表到中心,大孔壁到其周围密集区的两种浓度梯度。电子探针常用来测定元素分布。配在扫描电子显微镜(SEM)上的si(Li)探测器x射线能谱仪(EDAX),沿催化剂颗粒的直径或半径,进行逐点半定量分析,将各点平滑地连接也能得到元素分布图,但这些都仅仅反映了前一种浓度梯度。本文的论述旨在直接表现两种浓度梯度,并借助计算机反映在一张图上,还附以各点的SEM照片。
Impregnation-type catalyst with the preparation process in its existence there is adsorption and diffusion, the active ingredient exists from the outer surface of the particle to the center of the macropore wall to the surrounding concentration of two concentration gradient. Electron probes are often used to determine the elemental distribution. A si (Li) detector x-ray spectrometer (EDAX) equipped with a scanning electron microscope (SEM) performs point-by-point semi-quantitative analysis along the diameter or the radius of the catalyst particles to smoothly connect the dots to obtain the element Distribution, but these only reflect the former concentration gradient. The purpose of this article is to directly represent the two concentration gradients, which are reflected on a computer with the help of a SEM photograph of each point.