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Characteristics and hazards of the cinnamaldehyde oxidation process
Pressure and temperature behavior of the cinnamaldehyde oxidation process was determined using a custom-designed mini closed pressure vessel test (MCPVT), which is a new method to investigate the stability and hazard assesment of the cinnamaldehyde oxidation reaction. The oxidation products were ana...
Autores principales: | , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
The Royal Society of Chemistry
2020
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9053951/ https://www.ncbi.nlm.nih.gov/pubmed/35518288 http://dx.doi.org/10.1039/c9ra10820c |
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author | Yu, Chang Li, Yuan-Lin Liang, Min Dai, Su-Yi Ma, Li Li, Wei-Guang Lai, Fang Liu, Xiong-Min |
author_facet | Yu, Chang Li, Yuan-Lin Liang, Min Dai, Su-Yi Ma, Li Li, Wei-Guang Lai, Fang Liu, Xiong-Min |
author_sort | Yu, Chang |
collection | PubMed |
description | Pressure and temperature behavior of the cinnamaldehyde oxidation process was determined using a custom-designed mini closed pressure vessel test (MCPVT), which is a new method to investigate the stability and hazard assesment of the cinnamaldehyde oxidation reaction. The oxidation products were analyzed by gas chromatography-mass spectrometry (GC-MS). The results showed that cinnamaldehyde was stable under nitrogen atmosphere but very unstable under oxygen atmosphere. The initial oxidation products were analyzed by iodimetry and the cinnamaldehyde peroxide value could reach 139.44 mmol kg(−1) when the oxidation temperature was 308 K. The oxidation kinetics of cinnamaldehyde were studied by using the pressure versus time (P–t) curves obtained from the MCPVT process. The reaction is a second-order reaction, the kinetic equation is ln k = −2233.66 × (1/T) + 11.19, and the activation energy E(a) is 18.57 kJ mol(−1) at 308–338 K. The explosion of the cinnamaldehyde oxidation reaction was observed by MCPVT, in which the onset temperature was 373 K. The main products of cinnamaldehyde oxidation are acetaldehyde, benzaldehyde, phenylacetaldehyde, acetophenone, 2-hydroxyphenyl acetone, cinnamaldehyde epoxide, benzoic acid, and cinnamic acid. Oxidation is a three-step process: (1) cinnamaldehyde reacts with oxygen to form peroxides; (2) complex oxidation reactions are caused by the thermal decomposition of peroxides; (3) rapid oxidation and thermal decomposition lead to explosion hazard. |
format | Online Article Text |
id | pubmed-9053951 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2020 |
publisher | The Royal Society of Chemistry |
record_format | MEDLINE/PubMed |
spelling | pubmed-90539512022-05-04 Characteristics and hazards of the cinnamaldehyde oxidation process Yu, Chang Li, Yuan-Lin Liang, Min Dai, Su-Yi Ma, Li Li, Wei-Guang Lai, Fang Liu, Xiong-Min RSC Adv Chemistry Pressure and temperature behavior of the cinnamaldehyde oxidation process was determined using a custom-designed mini closed pressure vessel test (MCPVT), which is a new method to investigate the stability and hazard assesment of the cinnamaldehyde oxidation reaction. The oxidation products were analyzed by gas chromatography-mass spectrometry (GC-MS). The results showed that cinnamaldehyde was stable under nitrogen atmosphere but very unstable under oxygen atmosphere. The initial oxidation products were analyzed by iodimetry and the cinnamaldehyde peroxide value could reach 139.44 mmol kg(−1) when the oxidation temperature was 308 K. The oxidation kinetics of cinnamaldehyde were studied by using the pressure versus time (P–t) curves obtained from the MCPVT process. The reaction is a second-order reaction, the kinetic equation is ln k = −2233.66 × (1/T) + 11.19, and the activation energy E(a) is 18.57 kJ mol(−1) at 308–338 K. The explosion of the cinnamaldehyde oxidation reaction was observed by MCPVT, in which the onset temperature was 373 K. The main products of cinnamaldehyde oxidation are acetaldehyde, benzaldehyde, phenylacetaldehyde, acetophenone, 2-hydroxyphenyl acetone, cinnamaldehyde epoxide, benzoic acid, and cinnamic acid. Oxidation is a three-step process: (1) cinnamaldehyde reacts with oxygen to form peroxides; (2) complex oxidation reactions are caused by the thermal decomposition of peroxides; (3) rapid oxidation and thermal decomposition lead to explosion hazard. The Royal Society of Chemistry 2020-05-20 /pmc/articles/PMC9053951/ /pubmed/35518288 http://dx.doi.org/10.1039/c9ra10820c Text en This journal is © The Royal Society of Chemistry https://creativecommons.org/licenses/by-nc/3.0/ |
spellingShingle | Chemistry Yu, Chang Li, Yuan-Lin Liang, Min Dai, Su-Yi Ma, Li Li, Wei-Guang Lai, Fang Liu, Xiong-Min Characteristics and hazards of the cinnamaldehyde oxidation process |
title | Characteristics and hazards of the cinnamaldehyde oxidation process |
title_full | Characteristics and hazards of the cinnamaldehyde oxidation process |
title_fullStr | Characteristics and hazards of the cinnamaldehyde oxidation process |
title_full_unstemmed | Characteristics and hazards of the cinnamaldehyde oxidation process |
title_short | Characteristics and hazards of the cinnamaldehyde oxidation process |
title_sort | characteristics and hazards of the cinnamaldehyde oxidation process |
topic | Chemistry |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9053951/ https://www.ncbi.nlm.nih.gov/pubmed/35518288 http://dx.doi.org/10.1039/c9ra10820c |
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