Effect of nanostructured ferrites MFe₂ O₄ (M = Cu, Co, Mg, Zn) on the thermal decomposition of ammonium nitrate

Ammonium nitrate (NH₄ NO₃) represents a cheap, chlorine-free alternative to ammonium perchlorate for use as an oxidant for solid propellants. But its poor ignitability and low burning rate are all disadvantages to achieve such purposes. For this reason, it is necessary to carry out studies to improv...

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Autores principales: Cabrera, Alejandra Fabiana, Rodríguez Torres, Claudia Elena, Juncal, Luciana Celeste, Meyer, Marcos, Stewart, Silvana Jacqueline
Formato: Articulo
Lenguaje:Inglés
Publicado: 2021
Materias:
Física
Ammonium nitrate
Solid propellants
Spinel ferrites
Nanoparticle catalysts
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/159780
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-159780
record_format dspace
spelling I19-R120-10915-1597802023-11-08T20:07:23Z http://sedici.unlp.edu.ar/handle/10915/159780 Effect of nanostructured ferrites MFe₂ O₄ (M = Cu, Co, Mg, Zn) on the thermal decomposition of ammonium nitrate Cabrera, Alejandra Fabiana Rodríguez Torres, Claudia Elena Juncal, Luciana Celeste Meyer, Marcos Stewart, Silvana Jacqueline 2021 2023-11-03T18:10:19Z en Física Ammonium nitrate Solid propellants Spinel ferrites Nanoparticle catalysts Ammonium nitrate (NH₄ NO₃) represents a cheap, chlorine-free alternative to ammonium perchlorate for use as an oxidant for solid propellants. But its poor ignitability and low burning rate are all disadvantages to achieve such purposes. For this reason, it is necessary to carry out studies to improve its combustion characteristics, seeking to combine it with catalysts or fuels. The present work explores the possibility of improving its combustion characteristics by adding ferrites as catalysts. Nanostructured ferrites MFe₂ O 4 (M = Mg, Co, Cu, and Zn) synthesized by autocombustion method were tested as catalysts for the thermal decomposition reaction of ammonium nitrate under open, partially open or sealed conditions. The ferrites were characterized by XRD, SEM, UV-vis spectrophotometry and Mössbauer spectroscopy. All the MFe₂ O₄ samples are single phased with a cubic spinel structure and average sizes, L, ranging from about 9 (CoFe₂ O₄) to 25 nm (CuFe₂ O₄). The catalytic effect of MFe₂ O₄ on the thermal decomposition of NH 4 NO 3 was investigated by thermogravimetric analysis and differential scanning calorimetry techniques. The process was also followed in a volumetric Sieverts type apparatus. The results indicate that only under sealed conditions the addition of these ferrites has influence in the decomposition process of AN. The incorporation of any of these ferrites decreases the onset temperature of the process manifested itself through an exothermic reaction, and also increases the amount of heat released in the reaction. The Co-ferrite showed the best efficiency causing the onset temperature to drop around 60 °C. The catalytic performance is correlated with the electronegativity of M 2 + cations, which act as Lewis acid sites that interact with the gas molecules. Instituto de Física La Plata Articulo Articulo http://creativecommons.org/licenses/by-nc-nd/4.0/ Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0) application/pdf
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Física
Ammonium nitrate
Solid propellants
Spinel ferrites
Nanoparticle catalysts
spellingShingle Física
Ammonium nitrate
Solid propellants
Spinel ferrites
Nanoparticle catalysts
Cabrera, Alejandra Fabiana
Rodríguez Torres, Claudia Elena
Juncal, Luciana Celeste
Meyer, Marcos
Stewart, Silvana Jacqueline
Effect of nanostructured ferrites MFe₂ O₄ (M = Cu, Co, Mg, Zn) on the thermal decomposition of ammonium nitrate
topic_facet Física
Ammonium nitrate
Solid propellants
Spinel ferrites
Nanoparticle catalysts
description Ammonium nitrate (NH₄ NO₃) represents a cheap, chlorine-free alternative to ammonium perchlorate for use as an oxidant for solid propellants. But its poor ignitability and low burning rate are all disadvantages to achieve such purposes. For this reason, it is necessary to carry out studies to improve its combustion characteristics, seeking to combine it with catalysts or fuels. The present work explores the possibility of improving its combustion characteristics by adding ferrites as catalysts. Nanostructured ferrites MFe₂ O 4 (M = Mg, Co, Cu, and Zn) synthesized by autocombustion method were tested as catalysts for the thermal decomposition reaction of ammonium nitrate under open, partially open or sealed conditions. The ferrites were characterized by XRD, SEM, UV-vis spectrophotometry and Mössbauer spectroscopy. All the MFe₂ O₄ samples are single phased with a cubic spinel structure and average sizes, L, ranging from about 9 (CoFe₂ O₄) to 25 nm (CuFe₂ O₄). The catalytic effect of MFe₂ O₄ on the thermal decomposition of NH 4 NO 3 was investigated by thermogravimetric analysis and differential scanning calorimetry techniques. The process was also followed in a volumetric Sieverts type apparatus. The results indicate that only under sealed conditions the addition of these ferrites has influence in the decomposition process of AN. The incorporation of any of these ferrites decreases the onset temperature of the process manifested itself through an exothermic reaction, and also increases the amount of heat released in the reaction. The Co-ferrite showed the best efficiency causing the onset temperature to drop around 60 °C. The catalytic performance is correlated with the electronegativity of M 2 + cations, which act as Lewis acid sites that interact with the gas molecules.
format Articulo
Articulo
author Cabrera, Alejandra Fabiana
Rodríguez Torres, Claudia Elena
Juncal, Luciana Celeste
Meyer, Marcos
Stewart, Silvana Jacqueline
author_facet Cabrera, Alejandra Fabiana
Rodríguez Torres, Claudia Elena
Juncal, Luciana Celeste
Meyer, Marcos
Stewart, Silvana Jacqueline
author_sort Cabrera, Alejandra Fabiana
title Effect of nanostructured ferrites MFe₂ O₄ (M = Cu, Co, Mg, Zn) on the thermal decomposition of ammonium nitrate
title_short Effect of nanostructured ferrites MFe₂ O₄ (M = Cu, Co, Mg, Zn) on the thermal decomposition of ammonium nitrate
title_full Effect of nanostructured ferrites MFe₂ O₄ (M = Cu, Co, Mg, Zn) on the thermal decomposition of ammonium nitrate
title_fullStr Effect of nanostructured ferrites MFe₂ O₄ (M = Cu, Co, Mg, Zn) on the thermal decomposition of ammonium nitrate
title_full_unstemmed Effect of nanostructured ferrites MFe₂ O₄ (M = Cu, Co, Mg, Zn) on the thermal decomposition of ammonium nitrate
title_sort effect of nanostructured ferrites mfe₂ o₄ (m = cu, co, mg, zn) on the thermal decomposition of ammonium nitrate
publishDate 2021
url http://sedici.unlp.edu.ar/handle/10915/159780
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