Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Improving Oxidation Stability of Base Oil Based on Azophenols Additives: Experimental and Theoretical Studies
https://orcid.org/https://orcid.org/0000-0002-8006-7605
https://orcid.org/https://orcid.org/0000-0001-5524-9151
https://orcid.org/https://orcid.org/0000-0002-4448-0064
https://orcid.org/https://orcid.org/0000-0002-9693-6246
https://orcid.org/https://orcid.org/0000-0001-8601-6895
https://orcid.org/https://orcid.org/0000-0003-3398-2699
Novel azophenols (AP) were used as additives to improve the oxidation of a base oil. Two different azo phenol compounds, 2-(tert-butyl)-4-(p-tolyldiazenyl) phenol (1a) and 4-((4-bromophenyl) diazenyl)-2-(tert-butyl)phenol (1b) were prepared and characterized using elemental analysis, Fourier transform infrared spectroscopy, 1H nuclear magnetic resonance, and mass spectroscopy. To evaluate their suitability as antioxidants in base oil, the change in total acid number (TAN) and viscosity were investigated. Results revealed that the values of TAN and viscosity decrease after the addition of the AP, with 1a being a more effective antioxidant. Quantum chemical calculations (EHOMO, ELUMO and ∆E (–ELUMO – (–EHOMO)) showed good compatibility with the experimental results.
Improving Oxidation Stability of Base Oil Based on Azophenols Additives: Experimental and Theoretical Studies
https://orcid.org/https://orcid.org/0000-0002-8006-7605
https://orcid.org/https://orcid.org/0000-0001-5524-9151
https://orcid.org/https://orcid.org/0000-0002-4448-0064
https://orcid.org/https://orcid.org/0000-0002-9693-6246
https://orcid.org/https://orcid.org/0000-0001-8601-6895
https://orcid.org/https://orcid.org/0000-0003-3398-2699
Novel azophenols (AP) were used as additives to improve the oxidation of a base oil. Two different azo phenol compounds, 2-(tert-butyl)-4-(p-tolyldiazenyl) phenol (1a) and 4-((4-bromophenyl) diazenyl)-2-(tert-butyl)phenol (1b) were prepared and characterized using elemental analysis, Fourier transform infrared spectroscopy, 1H nuclear magnetic resonance, and mass spectroscopy. To evaluate their suitability as antioxidants in base oil, the change in total acid number (TAN) and viscosity were investigated. Results revealed that the values of TAN and viscosity decrease after the addition of the AP, with 1a being a more effective antioxidant. Quantum chemical calculations (EHOMO, ELUMO and ∆E (–ELUMO – (–EHOMO)) showed good compatibility with the experimental results.
Improving Oxidation Stability of Base Oil Based on Azophenols Additives: Experimental and Theoretical Studies
https://orcid.org/https://orcid.org/0000-0002-8006-7605
https://orcid.org/https://orcid.org/0000-0001-5524-9151
https://orcid.org/https://orcid.org/0000-0002-4448-0064
https://orcid.org/https://orcid.org/0000-0002-9693-6246
https://orcid.org/https://orcid.org/0000-0001-8601-6895
https://orcid.org/https://orcid.org/0000-0003-3398-2699
Novel azophenols (AP) were used as additives to improve the oxidation of a base oil. Two different azo phenol compounds, 2-(tert-butyl)-4-(p-tolyldiazenyl) phenol (1a) and 4-((4-bromophenyl) diazenyl)-2-(tert-butyl)phenol (1b) were prepared and characterized using elemental analysis, Fourier transform infrared spectroscopy, 1H nuclear magnetic resonance, and mass spectroscopy. To evaluate their suitability as antioxidants in base oil, the change in total acid number (TAN) and viscosity were investigated. Results revealed that the values of TAN and viscosity decrease after the addition of the AP, with 1a being a more effective antioxidant. Quantum chemical calculations (EHOMO, ELUMO and ∆E (–ELUMO – (–EHOMO)) showed good compatibility with the experimental results.
Improving Oxidation Stability of Base Oil Based on Azophenols Additives: Experimental and Theoretical Studies
Pet. Chem.
Ashmawy, Ashraf M. (Autor:in) / Nessim, Maher I. (Autor:in) / El-Dougdoug, W. I. (Autor:in) / Attia, Sayed K. (Autor:in) / Arief, M. H. (Autor:in) / Zidane, M. H. (Autor:in)
Petroleum Chemistry ; 61 ; 1275-1287
01.11.2021
13 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
Experimental and theoretical studies of the reinforced base of the pavement
| DOAJ | 2017
New Criterion of Human Stability in Floodwaters Based on Theoretical and Experimental Studies
| British Library Conference Proceedings | 2013
Experimental studies and modeling of the oxidation of multiphase niobium-base alloys
| British Library Online Contents | 2009
Improving the Stability of Additives of Silane Agent Solution Applied to Metallic Surface Treatment
| British Library Online Contents | 2002