首页|Development of a spatially resolved technique for the measurement of effective diffusions and its application to the modelling of washcoated catalytic monoliths
Development of a spatially resolved technique for the measurement of effective diffusions and its application to the modelling of washcoated catalytic monoliths
扫码查看
点击上方二维码区域，可以放大扫码查看
原文链接
NSTL
Elsevier
A spatially resolved technique was developed as a novel methodology to investigate the process of effective diffusions in monolith catalysts. The technique was then applied to the investigation of methane oxidation inside a commercial 3 wt% Pd/Al2O3 monolith catalyst. The mass transfer parameters of O-2 and CH4 were measured, and their effective diffusivities were calculated by a modified Bosanquet approach, which confirmed that the dominant diffusion regime in the substrate and the washcoat were molecular and Knudsen respectively. The applicability of this new approach was assessed via a comparison between simulations of the water-inhibited CH4 catalytic oxidation using either correlation or experimental-based mass transfer coefficients. This study demonstrates that careful measurement of diffusivity is essential to the accurate modelling of catalyst reaction rates.
NSTL
Elsevier
