Moving reaction fronts in fractal nanoparticle agglomerates

Jin, Wenjie; van Ommen, J.R.; Kleijn, Chris R.

Moving reaction fronts in fractal nanoparticle agglomerates

Journal article (2019)

Authors

Wenjie Jin ChemE/Product and Process Engineering -

J.R. van Ommen ChemE/Product and Process Engineering -

Chris R. Kleijn ChemE/Transport Phenomena -

Research Group

ChemE/Product and Process Engineering () (TU Delft)

Atomic layer deposition Knudsen diffusion Nanoparticle agglomerate Self-limiting surface reaction

To reference this document use:

http://resolver.tudelft.nl/uuid:193eb49a-5140-4870-ab29-eb3117c7ca84

More Info

expand_more

Published Date

12-10-2019

Language

English

Reuse Rights

Other than for strictly personal use, it is not permitted to download, forward or distribute the text or part of it, without the consent of the author(s) and/or copyright holder(s), unless the work is under an open content license such as Creative Commons.

Faculty

Applied Sciences

Department

ChemE/Chemical Engineering

Research Group

ChemE/Product and Process Engineering

Abstract

Self-limiting gas-surface reactions lead to reaction fronts that penetrate nanoporous materials with a finite speed. We present a closed form theoretical model, validated against molecular simulations, that shows the influence of the fractal scaling law on the time needed to fully penetrate fractal agglomerates of nanoparticles. For very large agglomerate sizes, this penetration time scales with the number of particles N in the agglomerate as [Fourmula presented]. The penetration time for agglomerates with fractal dimensions D_f<3 may therefore be orders of magnitude smaller than for non-fractal porous materials.

Files

1_s2.0_S0009250919304592_main.... (pdf)

(pdf | 1.59 Mb)

Unknown license

Download not available