Prof. JOSE MANUEL CATALA CIVERA

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Academic Career Length

27Years (2000-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

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2 November 2020 in Nature Energy

Journal Article

Hydrogen production via microwave-induced water splitting at low temperature

Jose M. Serra

J. F. Borrás-Morell

Beatriz Garcia-Banos

M. Balaguer

P. Plaza-González

JOSE MANUEL CATALA CIVERA

9 May 2005 in IEEE Transactions on Microwave Theory and Techniques

Journal Article

Effect of mode-stirrer configurations on dielectric heating performance in multimode microwave applicators

P. Plaza-Gonzalez

Juan Monzó-Cabrera

JOSE MANUEL CATALA CIVERA

D. Sanchez-Hernandez

In this paper, several mode-stirrer configurations are compared in order to establish their influence on the electric-field uniformity within an irradiated dielectric sample inserted in a microwave-heating applicator. Two different scenarios are evaluated with metallic sheets moving inside the multimode applicator. The different stirrer configurations are tested and compared for low-, medium-, and high-loss dielectric sample materials. Additionally, a straightforward procedure based on a generalized plane-wave approach is proposed and evaluated as a computationally efficient alternative for calculating the electric-field distribution inside materials processed in these microwave applicators with mode stirrers. Although very different electric patterns are achieved depending on stirrer geometry and sample permittivity, the plane-wave approach has been shown to provide a very good approximation for medium and high lossy dielectric materials.

18 May 2004 in IEEE Transactions on Magnetics

Journal Article

New Approach for the Prediction of the Electric Field Distribution in Multimode Microwave-Heating Applicators With Mode Stirrers

P. Plaza-Gonzalez

Juan Monzó-Cabrera

JOSE MANUEL CATALA CIVERA

D. Sanchez-Hernandez

We present a new approach for inferring the electric field distribution inside materials in multimode cavities with mode stirrers. We calculate the electric field in the dielectric material by a two-dimensional modeling of a typical multimode microwave applicator with some mobile metallic sheets. We compare simulated results with classical approaches, such as Lambert's law or a constant electric field distribution. The proposed method allows for a better understanding of how these structures can be applied for heating materials when computing the microwave energy absorption in the dielectric. Finally, we perform experimental tests in a microwave multimode oven for validating purposes.

15 September 2023 in Science Advances

Journal Article

Microwave-assisted, performance-advantaged electrification of propane dehydrogenation

Nonoxidative propane dehydrogenation (PDH) produces on-site propylene for value-added chemicals. While commercial, its modest selectivity and catalyst deactivation hamper the process efficiency and limit operation to lower temperatures. We demonstrate PDH in a microwave (MW)–heated reactor over PtSn/SiO ₂ catalyst pellets loaded in a SiC monolith acting as MW susceptor and a heat distributor while ensuring comparable conditions with conventional reactors. Time-on-stream experiments show active and stable operation at 500°C without hydrogen addition. Upon increasing temperature or feed partial pressure at high space velocity, catalysts under MWs show resistance in coking and sintering, high activity, and selectivity, starkly contrasting conventional reactors whose catalyst undergoes deactivation. Mechanistic differences in coke formation are exposed. Gas-solid temperature gradients are computationally investigated, and nanoscale temperature inhomogeneities are proposed to rationalize the different performances of the heating modes. The approach highlights the great potential of electrification of endothermic catalytic reactions.

9 February 2012 in International Journal of Applied Ceramic Technology

Journal Article

Microwave Sintering of Zirconia Materials: Mechanical and Microstructural Properties

Amparo Borrell

María D. Salvador

Felipe L. Penaranda-Foix

JOSE MANUEL CATALA CIVERA

7 May 2016 in Materials

Journal Article

In Situ Monitoring of Microwave Processing of Materials at High Temperatures through Dielectric Properties Measurement

Beatriz Garcia-Banos

JOSE MANUEL CATALA CIVERA

Felipe L. Penaranda-Foix

Pedro Plaza-González

Gabriel Llorens-Vallés

Microwave-assisted processes have recognized advantages over more conventional heating techniques. However, the effects on the materials’ microstructure are still a matter of study, due to the complexity of the interaction between microwaves and matter, especially at high temperatures. Recently developed advanced microwave instrumentation allows the study of high temperature microwave heating processes in a way that was not possible before. In this paper, different materials and thermal processes induced by microwaves have been studied through the in situ characterization of their dielectric properties with temperature. This knowledge is crucial in several aspects: to analyze the effects of the microwave field on the reaction pathways; to design and optimize microwave-assisted processes, and to predict the behavior of materials leading to repeatable and reliable heating processes, etc.

About Me

José M. Catalá-Civera was born in Valencia (Spain) in February 1969. He received the Dipl. Ing. and Ph.D. degrees from the Universitat Politècnica de València, Spain, in 1993 and 2000, respectively. Since 1996, he has been with the Communications Department, Universitat Politècnica de València, where he received the Readership in 2000, becoming full professor in 2011. Currently he is director of the Research Institute of Information and Communication Technologies (ITACA) at the Universitat Politècnica de València and co-head of the Microwave Division of the Institute. His research interests encompass the design and application of microwave theory and applications, the use of microwaves for electromagnetic heating, microwave cavities and resonators, measurement of dielectric and magnetic properties of materials, and development of microwave sensors for non-destructive testing. He has co-authored more than 100 papers in referred journals and conference proceedings, more than 70 engineering reports for various companies, and he holds 26 patents. Prof. Catalá-Civera is reviewer of several international journals and conferences, an IEEE Senior Member and AMPERE Member (Association of Microwave Power in Europe for Research and Education), a European-based organization devoted to the promotion of RF and microwave energy.

Prof. JOSE MANUEL CATALA CIVERA

Prof. JOSE MANUEL CATALA CIVERA

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