Thermal regeneration of diesel particulate in metallic fibrous filter

Chau, Wanda Man Wai; Cheung, Chun Shun; Leung, Chun Wah

doi:10.1007/s00231-002-0403-y

Cited by 1 publication

(1 citation statement)

References 16 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…High film porosities are desirable because the film porosity governs mass transfer 1 Author to whom any correspondence should be addressed. rates in combinatorial catalyst studies (Thybo et al 2004), electron diffusion pathways in TiO 2 dye-sensitized solar cells (Benkstein et al 2003, Grätzel 2001, thermal regeneration of diesel soot traps (Chau et al 2004), and the performance of gas sensing films (Dimitrov et al 1999, Park andMackenzie 1996). In addition to the film porosity, film thickness is another important design parameter.…”

Section: Introductionmentioning

confidence: 99%

One-step aerosol synthesis of nanoparticle agglomerate films: simulation of film porosity and thickness

Mädler¹,

2006

View full text Add to dashboard Cite

A method is described for designing nanoparticle agglomerate films with desired film porosity and film thickness. Nanoparticle agglomerates generated in aerosol reactors can be directly deposited on substrates to form uniform porous films in one step, a significant advance over existing technologies. The effect of agglomerate morphology and deposition mechanism on film porosity and thickness are discussed. Film porosity was calculated for a given number and size of primary particles that compose the agglomerates, and fractal dimension. Agglomerate transport was described by the Langevin equation of motion. Deposition enhancing forces such as thermophoresis are incorporated in the model. The method was validated for single spherical particles using previous theoretical studies. An S-shape film porosity dependence on the particle Peclet number typical for spherical particles was also observed for agglomerates, but films formed from agglomerates had much higher porosities than films from spherical particles. Predicted film porosities compared well with measurements reported in the literature. Film porosities increased with the number of primary particles that compose an agglomerate and higher fractal dimension agglomerates resulted in denser films. Film thickness as a function of agglomerate deposition time was calculated from the agglomerate deposition flux in the presence of thermophoresis. The calculated film thickness was in good agreement with measured literature values. Thermophoresis can be used to reduce deposition time without affecting the film porosity.

show abstract

Section: Introductionmentioning

confidence: 99%