Corpus ID: 55766983

Analyzing Gas Transport Phenomena in Secondary Pore of Washcoat Layer Determined by X-ray Ct and Modeling

@article{Kato2017AnalyzingGT,
  title={Analyzing Gas Transport Phenomena in Secondary Pore of Washcoat Layer Determined by X-ray Ct and Modeling},
  author={S. Kato and S. Yamaguchi and Takeshi Uyama and Toshitaka Tanabe and Y. Nagai and J. Yamauchi and H. Yamada and T. Tagawa},
  journal={Chemical engineering transactions},
  year={2017},
  volume={57},
  pages={1237-1242}
}
Washcoated catalysts on honeycomb substrates are widely used as automotive catalysts, and it is well known that their catalytic performance is limited by gas transport resistance. In order to reduce the gas transport resistance, understanding the relationship between gas transport and pore properties is essential. Since a washcoat layer consists of porous metal oxide particles (e.g., Al2O3), the washcoat layer has two types of pores: primary pores, which are located inside the porous metal… Expand

Figures and Tables from this paper

References

SHOWING 1-10 OF 11 REFERENCES
Characterization of secondary pores in washcoat layers and their effect on effective gas transport properties
Abstract It is well known that the performance of monolithic catalysts is limited by gas transport resistance in the washcoat layer. Gases are transported via two types of pores within the washcoatExpand
Analysis of the Gas Diffusivity in the Simulated Washcoat Layer Based on Mean Transport Pore Model and Mean Molecular Speed
The pore structure of a simulated washcoat layer was evaluated using the Mean Transport Pore Model (MTPM). The MTPM provides the mean diffusive pore radius (rm) of a simulated washcoat layer from theExpand
Strategy for predicting effective transport properties of complex porous structures
TLDR
The reconstruction of porous alumina catalyst carrier with bimodal pore size distribution is demonstrated and it is shown that the contribution of nano-pores towards the total diffusion flux is significant and cannot be neglected, but it is reasonable to neglect the contribution to the sample permeability. Expand
Direct measurements of gas diffusivity in a washcoat layer under steady state and heated conditions
Abstract A Wicke–Kallenbach-type counter-current diffusion cell was developed to measure gas diffusivity in a ZrO 2 based simulated washcoat layer under heated conditions, by using components withExpand
Direct measurements of gas diffusivity in a washcoat layer under steady state conditions at ambient temperature
Abstract A method for directly measuring gas diffusivity in a washcoat layer was established by preparing a simulated washcoat layer and modifying a Wicke–Kallenbach type counter-current diffusionExpand
Toyota beamline (BL33XU) at SPring-8
The Toyota beamline (BL33XU) at SPring-8 is an undulator beamline developed to assist in the study of various automotive-related materials. The light source is a tapered in-vacuum undulator thatExpand
Fluid flow through granular beds
2015a, Analysis of the Gas Diffusivity
  • 2015
Direct measurements of gas
  • 2013
A Calculation Model for Gas Flow and Diffusion of a Porous
  • 1989
...
1
2
...