Spatial resolution of kinetic oscillations within a catalytic monolith
Introduction Many catalytic processes resulted from the development of structured catalysts such as monoliths 1. However, under real working conditions, these monolithic catalysts show significant spatial heterogeneity, making process control and modeling inaccurate. This is primarily due to lack of reliable quantitative chemical analysis and temperature profiles, during reaction inside the monolith since catalytic properties are generally screened at the exhaust exit (end-pipe analysis). Oak Ridge National Laboratory pioneered studies inside of monolithic catalysts by developing the first generation of SpaciMS, consisting in a spatially resolved capillary-inlet mass spectrometry 2. In the aim of improving the spatial resolution and sensitivity of the Spaci technique, a second generation has been developed. To assess this new development, the CO oxidation over of Pt-Rh/Al2O3 washcoated monoliths has been investigated. The results demonstrated the high sensitivity of the technique since it was possible to resolve kinetic oscillations and their dependance on the local reaction conditions.
Jacinto Sá Alexandre Goguet Cristina Stere Wasif Naeem Daniel Luis Abreu Fernandes Christopher Hardacre William P. Partridge
School of Chemistry and Chemical Engineering, Queens University Belfast, BT9 5AG, UK School of Electronics, Electrical Engineering, Queens University Belfast, BT9 5AH, UK Departamento de Química, Universidade de Aveiro, Aveiro, Portugal Fuels, Engines and Emissions Research center, Oak Ridge National Laboratory, Oak Ridge, USA
国际会议
6th International Conference on Environmental Catalysis(第六届国际环境催化大会 ICEC 2010)
北京
英文
32-32
2010-09-12（万方平台首次上网日期，不代表论文的发表时间）