Study of the Decomposition of N-Nitrosonornicotine (NNN) under Inert and Oxidative Atmospheres: Effect of the Addition of SBA-15 and MCM-41
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 fu...
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MDPI AG
2022-09-01
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| Online Access: | https://www.mdpi.com/2076-3417/12/19/9426 |
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| author | Javier Asensio María Isabel Beltrán Nerea Juárez-Serrano Deseada Berenguer Antonio Marcilla |
| author_facet | Javier Asensio María Isabel Beltrán Nerea Juárez-Serrano Deseada Berenguer Antonio Marcilla |
| author_sort | Javier Asensio |
| collection | DOAJ |
| description | 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 O<sub>2</sub> atmosphere (3-pyridinecarbonitrile and myosmine showed the major effect). SBA-15 with fibrous morphology obtains the best reductions at pyrolysis conditions. |
| first_indexed | 2024-03-09T22:07:52Z |
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| institution | Directory Open Access Journal |
| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-03-09T22:07:52Z |
| publishDate | 2022-09-01 |
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| series | Applied Sciences |
| spelling | doaj.art-cc63c8a3d27a4d14b1beb7148f3456092023-11-23T19:39:19ZengMDPI AGApplied Sciences2076-34172022-09-011219942610.3390/app12199426Study of the Decomposition of N-Nitrosonornicotine (NNN) under Inert and Oxidative Atmospheres: Effect of the Addition of SBA-15 and MCM-41Javier Asensio0María Isabel Beltrán1Nerea Juárez-Serrano2Deseada Berenguer3Antonio Marcilla4Institute of Chemical Process Engineering, University of Alicante, San Vicente del Raspeig, 03690 Alicante, SpainInstitute of Chemical Process Engineering, University of Alicante, San Vicente del Raspeig, 03690 Alicante, SpainInstitute of Chemical Process Engineering, University of Alicante, San Vicente del Raspeig, 03690 Alicante, SpainInstitute of Chemical Process Engineering, University of Alicante, San Vicente del Raspeig, 03690 Alicante, SpainInstitute of Chemical Process Engineering, University of Alicante, San Vicente del Raspeig, 03690 Alicante, SpainNowadays, 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 O<sub>2</sub> atmosphere (3-pyridinecarbonitrile and myosmine showed the major effect). SBA-15 with fibrous morphology obtains the best reductions at pyrolysis conditions.https://www.mdpi.com/2076-3417/12/19/9426NNNnitrosaminepyridinesSBA-15MCM-41pyrolysis |
| spellingShingle | Javier Asensio María Isabel Beltrán Nerea Juárez-Serrano Deseada Berenguer Antonio Marcilla 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 NNN nitrosamine pyridines SBA-15 MCM-41 pyrolysis |
| title | Study of the Decomposition of N-Nitrosonornicotine (NNN) under Inert and Oxidative Atmospheres: Effect of the Addition of SBA-15 and MCM-41 |
| title_full | Study of the Decomposition of N-Nitrosonornicotine (NNN) under Inert and Oxidative Atmospheres: Effect of the Addition of SBA-15 and MCM-41 |
| title_fullStr | Study of the Decomposition of N-Nitrosonornicotine (NNN) under Inert and Oxidative Atmospheres: Effect of the Addition of SBA-15 and MCM-41 |
| title_full_unstemmed | Study of the Decomposition of N-Nitrosonornicotine (NNN) under Inert and Oxidative Atmospheres: Effect of the Addition of SBA-15 and MCM-41 |
| title_short | Study of the Decomposition of N-Nitrosonornicotine (NNN) under Inert and Oxidative Atmospheres: Effect of the Addition of SBA-15 and MCM-41 |
| title_sort | study of the decomposition of n nitrosonornicotine nnn under inert and oxidative atmospheres effect of the addition of sba 15 and mcm 41 |
| topic | NNN nitrosamine pyridines SBA-15 MCM-41 pyrolysis |
| url | https://www.mdpi.com/2076-3417/12/19/9426 |
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