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RISS 인기검색어
- 검색키워드
- 저자 : Mikhail A. Varfolomeev (검색결과 2 건)
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Chengdong Yuan,Dmitrii A. Emelianov,Mikhail A. Varfolomeev,Mustafa Abaas 한국공업화학회 2019 Journal of Industrial and Engineering Chemistry Vol.76 No.-
The combustion behavior of aromatics (p-quaterphenyl, thioxanthone, pyrene) and their interaction withn-alkane (tetracosane) were investigated by high-pressure differential scanning calorimetry (HP-DSC). Tetracosane only showed low-temperature oxidation (LTO), while p-quaterphenyl and thioxanthone onlyshowed high-temperature oxidation (HTO). Pyrene exhibited a unique middle-high temperatureoxidation (M-HTO). Tetracosane significantly promoted the HTO of p-quaterphenyl and thioxanthone,and shifted their HTO into lower temperatures. While p-quaterphenyl and thioxanthone did notsignificantly affect the occurrence of the LTO of tetracosane, but they did reduce the heat release andreaction rate of the LTO of tetracosane. The co-oxidation of tetracosane and pyrene triggered an intenseinteraction that exerts a strong inhibition on the LTO of tetracosane, and induces an explosive oxidationreaction followed by a mild oxidation from 280 to 325 C. The intense interaction also significantlypromoted the HTO of the pyrene. In general, the interaction strength is in turn pyrene + tetracosane >thioxanthone + tetracosane > p-quaterphenyl + tetracosane. Due to the strong interaction between thealkane and aromatics during their co-oxidation, the additivity of heat release in both LTO and HTO cannotbe applied in terms of reaction process as well as total heat release.
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Alireza Rahimi,Abdolreza Farhadian,Lei Guo,Esmaeil Akbarinezhad,Ruhollah Sharifi,Danial Iravani,Ali Asghar Javidparvar,Mohamed A. Deyab,Mikhail A. Varfolomeev 한국공업화학회 2023 Journal of Industrial and Engineering Chemistry Vol.123 No.-
Sunflower oil was used as environmentally friendly source to develop novel self-catalyzed waterbornepolyurethanes (WPUs) as efficient corrosion inhibitors for sour oilfield solution. A comprehensive experimentaland computational analysis was performed to evaluate the inhibition effect of WPUs. The resultsof electrochemical measurements indicated that 200 lM of WPUs were effectively protected mild steelfrom sour corrosion by 95% and 94.6% at 25 C and 60 C, respectively. Furthermore, it was found thatthe best inhibition efficiency was provided by WPU when pyrrolidine was included in its structure, particularlyat 60 C. Additionally, a smoother steel surface was observed in the presence of WPUs, indicatingthe adsorption of the polyurethane molecules on the metal surface. The results of X-ray photoelectronspectroscopy further confirmed the chemical adsorption of WPUs on the surface of mild steel. Moreover, scanning Kelvin probe microscopy revealed that the potential distribution of the steel surfacewas shifted to the negative values, which show the adsorption of the inhibitor on the surface and inhibitionof the corrosion process. Besides, high values of adsorption energy were achieved for WPUs usingmolecular dynamic simulation, indicating their spontaneous adsorption to the Fe (110) surface. The maximumadsorption energy of 794.9 kcal/mol was obtained for WPU3, which is consistent with experimentaldata. These results show that sunflower oil can be considered a potential source to developself-catalyzed polyurethanes under mild conditions as effective corrosion inhibitors for sourenvironment.
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