In this work, we characterized ceramic open cell foams made of zirconia, silicon carbide and alumina of different nominal pore densities (30–45 ppi) using X-ray computed microtomography. This technique allowed the comprehensive and quantitative extraction of morphological and geometrical characteristics of the structures (pore size, strut diameter and length, node diameter, open porosity and specific geometrical surface area). An empirical model was proposed to determine the specific surface area from parameters easily accessible with standard laboratory equipment. Moreover, lean CH4 combustion tests were performed on ceramic foams coated with PdO/Co3O4 at 3 wt%. Mass transfer coefficients of the foams were measured by monitoring the oxidation reaction under diffusional control conditions. We derived a dimensionless correlation of the type Sh = A•Rem•Sc1/3. Finally, the pressure drop across the foams as a function of surface velocity was evaluated and compared with various experimental data and models available in the literature.
Authors
Carmen Moncada Quintero, Hernan Mazzei, Marion Servel, Frédéric Augier, Yacine Haroun, Jean-François Joly, Stefania Specchia
Related Organizations
- Bibliographic Reference
- Carmen Moncada Quintero, Hernan Mazzei, Marion Servel, Frédéric Augier, Yacine Haroun, et al.. Investigating mass transfer coefficients in lean methane combustion reaction through the morphological and geometric analysis of structured open cell foam catalysts. Chemical Engineering Science, 2023, 281, pp.119138. ⟨10.1016/j.ces.2023.119138⟩. ⟨hal-04179987⟩
- DOI
- https://doi.org/10.1016/j.ces.2023.119138
- HAL Collection
- IFP Energies Nouvelles
- HAL Identifier
- 4179987
- Institution
- ['Politecnico di Torino = Polytechnic of Turin', 'IFP Energies nouvelles']
- Published in
- France
Table of Contents
- Investigating mass transfer coefficients in lean methane combustion reaction through the morphological and geometric analys ... 2
- 1 Introduction 2
- 2 Experimental section 4
- 2.1 Ceramic open cell foams (OCFs) 4
- 2.2 X-ray computed tomography characterization of the OCFs 4
- 2.3 Image processing 4
- 2.4 Preparation of OCF structured catalysts 5
- 2.5 Catalytic activity 5
- 2.6 Pressure drop measurements 5
- 3 Results and discussion 6
- 3.1 Characteristic dimensions 6
- 3.2 Porosity 8
- 3.3 Specific surface area 9
- 3.4 Mass transfer correlation for OCFs 10
- 3.5 Pressure drop measurements 14
- 4 Conclusions 15
- Funding sources 16
- CRediT authorship contribution statement 16
- Declaration of Competing Interest 16
- Data availability 16
- Acknowledgements 16
- Appendix A Supplementary data 16
- References 16
