A New Methodology for Washcoat Analysis of Honeycomb-shaped Monolithic Catalysts Using Scanning Electron Microscopy and Energy-Dispersive X-ray Analysis

Publication date: December 2019Source: Chinese Journal of Analytical Chemistry, Volume 47, Issue 12Author(s): Long-Chun BIAN, Cheng-Xiong WANG, Yan-Xiong LIU, Qiu-E CAO, Yun-Kun ZHAOAbstractThe thickness of washcoat loading on high-performance monolithic catalysts is normally determined by vernier caliper procedure, which gives rough result of washcoat thickness but does not address such parameters as morphology and homogeneity, accurate thickness of the layer and chemical composition of the coated layers in honeycomb-shaped monolithic catalysts. In this work, we proposed a methodology of washcoat analysis including the thickness and chemical composition of the coated layers in honeycomb-shaped monolithic catalysts. The method can realize accurate determination of washcoat thickness and the direct analysis of chemical composition in washcoat of single-layered or double-layered monolith catalyst, which is applicable for research and development of e coating technology and detection of product.Graphical abstractAn accurate and reliable methodology to analyse the coated layers in the honeycomb-shaped monolithic catalyst using SEM and EDS analysis was proposed. The methodology can achieve thickness determination and chemical analysis of the coated catalyst layers, which will be well applied in research of the coating technology and product detection.
Source: Chinese Journal of Analytical Chemistry - Category: Chemistry Source Type: research