Artículo
Incorporation of a metal catalyst for the ammonia synthesis in a ferroelectric packed-bed plasma reactor: does it really matter?
Autor/es | Navascués, Paula
Garrido García, Juan Cotrino Bautista, José Rodríguez González-Elipe, Agustín Gómez Ramírez, Ana María |
Departamento | Universidad de Sevilla. Departamento de Matemática Aplicada I (ETSII) Universidad de Sevilla. Departamento de Física Atómica, Molecular y Nuclear |
Fecha de publicación | 2023-02-20 |
Fecha de depósito | 2024-03-12 |
Publicado en |
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Resumen | Plasma-catalysis has been proposed as a potential alternative for the synthesis of ammonia. Studies in this area focus on the reaction mechanisms and the apparent synergy existing between processes occurring in the plasma ... Plasma-catalysis has been proposed as a potential alternative for the synthesis of ammonia. Studies in this area focus on the reaction mechanisms and the apparent synergy existing between processes occurring in the plasma phase and on the surface of the catalytic material. In the present study, we approach this problem using a parallel-plate packed-bed reactor with the gap between the electrodes filled with pellets of lead zirconate titanate (PZT), with this ferroelectric material modified with a coating layer of alumina (i.e., Al2O3/PZT) and the same alumina layer incorporating ruthenium nanoparticles (i.e., Ru-Al2O3/PZT). At ambient temperature, the electrical behavior of the ferroelectric packed-bed reactor differed for these three types of barriers, with the plasma current reaching a maximum when using Ru-Al2O3/PZT pellets. A systematic analysis of the reaction yield and energy efficiency for the ammonia synthesis reaction, at ambient temperature and at 190 °C and various electrical operating conditions, has demonstrated that the yield and the energy efficiency for the ammonia synthesis do not significantly improve when including ruthenium particles, even at temperatures at which an incipient catalytic activity could be inferred. Besides disregarding a net plasma-catalysis effect, reaction results highlight the positive role of the ferroelectric PZT as moderator of the discharge, that of Ru particles as plasma hot points, and that of the Al2O3 coating as a plasma cooling dielectric layer. |
Agencias financiadoras | Ministerio de Ciencia, Innovación y Universidades (MICINN). España European Commission (EC). Fondo Europeo de Desarrollo Regional (FEDER) Junta de Andalucía |
Identificador del proyecto | PID2020-114270RA-I00
PID2020-112620 MCIN/AEI/10.13039/501100011033 TED2021-130124A-I00 MCIN/AEI/10.13039/501100011033 US-1380977 US-1381045 P18-RT-3480 |
Cita | Navascués, P., Garrido García, J., Cotrino Bautista, J., Rodríguez González-Elipe, A. y Gómez Ramírez, A.M. (2023). Incorporation of a metal catalyst for the ammonia synthesis in a ferroelectric packed-bed plasma reactor: does it really matter?. ACS Sustainable Chemistry and Engineering, 11 (9), 3621-3632. https://doi.org/10.1021/acssuschemeng.2c05877?urlappend=%3Fref%3DPDF&jav=VoR&rel=cite-as. |
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