Study of the Decomposition of N-Nitrosonornicotine (NNN) under Inert and Oxidative Atmospheres: Effect of the Addition of SBA-15 and MCM-41
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Título: | Study of the Decomposition of N-Nitrosonornicotine (NNN) under Inert and Oxidative Atmospheres: Effect of the Addition of SBA-15 and MCM-41 |
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Autor/es: | Asensio, Javier | Beltrán, Maribel | Juárez-Serrano, Nerea | Berenguer Muñoz, Deseada | Marcilla, Antonio |
Grupo/s de investigación o GITE: | Procesado y Pirólisis de Polímeros |
Centro, Departamento o Servicio: | Universidad de Alicante. Departamento de Ingeniería Química | Universidad de Alicante. Instituto Universitario de Ingeniería de los Procesos Químicos |
Palabras clave: | NNN | Nitrosamine | Pyridines | SBA-15 | MCM-41 | Pyrolysis | Mesoporous catalysts | EGA/Py/GC/MS |
Fecha de publicación: | 20-sep-2022 |
Editor: | MDPI |
Cita bibliográfica: | Asensio J, Beltrán MI, Juárez-Serrano N, Berenguer D, Marcilla A. Study of the Decomposition of N-Nitrosonornicotine (NNN) under Inert and Oxidative Atmospheres: Effect of the Addition of SBA-15 and MCM-41. Applied Sciences. 2022; 12(19):9426. https://doi.org/10.3390/app12199426 |
Resumen: | Nowadays, the use of tobacco biomass as an energy source is being valued. Therefore, it is important to know the processes that take place during combustion and pyrolysis, as well as the substances that are formed. In this work, we study the compounds obtained during the decomposition of NNN as a function of temperature under inert and oxidant atmospheres. Moreover, the effect of the addition of SBA-15 and MCM-41 is analyzed. Two different techniques, i.e., TG/FTIR (low heating rates) and EGA Py/GC/MS (high heating rates), are used. At low temperatures NNN is almost unaltered, but it is volatilized and dragged by the carrier gas. When increasing the temperature, decomposition takes place, with pyridines being one of the most abundant compounds observed. The main compound obtained during the pyrolysis are 3- pyridinecarbonitrile, myosmine and nornicotine, which are precursors of NNN. When NNN is mixed with SBA-15, the decomposition of the NNN nitrosamine is favored at low temperatures where the yield in pyridine compounds increases. The catalysts modify the temperature and intensity of the processes, especially under an oxidative atmosphere where the residue is oxidized, showing a third loss of weight. These materials modify the compositions of gases, mainly under an O2 atmosphere (3-pyridinecarbonitrile and myosmine showed the major effect). SBA-15 with fibrous morphology obtains the best reductions at pyrolysis conditions. |
Patrocinador/es: | Financial support for this investigation has been provided by the “Conselleria d’Educació, Investigació, Cultura i Esport” (grant numbers IDIFEDER 2018/009 and PROMETEO2020/093). |
URI: | http://hdl.handle.net/10045/128812 |
ISSN: | 2076-3417 |
DOI: | 10.3390/app12199426 |
Idioma: | eng |
Tipo: | info:eu-repo/semantics/article |
Derechos: | © 2022 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). |
Revisión científica: | si |
Versión del editor: | https://doi.org/10.3390/app12199426 |
Aparece en las colecciones: | INV - GTP3 - Artículos de Investigación sobre Pirólisis Catalítica de Polímeros |
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