Investigation of the Catalytic Properties of Aluminum Oxide (Al<sub>2</sub>O<sub>3</sub>) and Pyrite (FeS<sub>2</sub>) Using Thermodynamic and Kinetic Parameters
The kinetics of anthracene hydrogenation was studied using the method of equilibrium kinetic analysis. To determine the diffusion–kinetic characteristics, anthracene hydrogenation was performed at different temperatures (648 K, 673 K, 698 K), at a hydrogen pressure of 3 MPa in the presence of a mixt...
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2025-01-01
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| author | Aigul T. Ordabaeva Zainulla M. Muldakhmetov Mazhit G. Meiramov Sergey V. Kim Shuga B. Kasenova Serik D. Fazylov |
| author_facet | Aigul T. Ordabaeva Zainulla M. Muldakhmetov Mazhit G. Meiramov Sergey V. Kim Shuga B. Kasenova Serik D. Fazylov |
| author_sort | Aigul T. Ordabaeva |
| collection | DOAJ |
| description | The kinetics of anthracene hydrogenation was studied using the method of equilibrium kinetic analysis. To determine the diffusion–kinetic characteristics, anthracene hydrogenation was performed at different temperatures (648 K, 673 K, 698 K), at a hydrogen pressure of 3 MPa in the presence of a mixture of pyrite (FeS<sub>2</sub>) and aluminum oxide (Al<sub>2</sub>O<sub>3</sub>) taken at a ratio of 1:1. Chromatographic analysis of anthracene hydrogenation products showed the presence of 9,10-dihydroanthracene (DHA), 1,2,3,4-tetrahydroanthracene (THA), methylnaphthalene (MN), naphthalene (H) and other unidentified compounds. In order to preserve the material balance, a total hydrogenation reaction of anthracene, up to 9,10-dihydroanthracene, was proposed as characterized by the highest rate in the presence of pyrite-based catalysts and aluminum oxide. Calculations of the degrees of rotation of anthracene, reaction constants, and Gibbs energy have shown that with increasing temperature, the reaction becomes more thermodynamically advantageous. Based on the obtained data, Arrhenius dependences were constructed, which made it possible to calculate the activation energies of direct (39.4 kJ/mol) and reverse (13.04 kJ/mol) reactions. Thus, based on the calculations performed, it was found that the process of anthracene hydrogenation in the presence of a mixture of pyrite and aluminum oxide proceeds mainly in the diffusion region. |
| format | Article |
| id | doaj-art-d61fa69f85504348b66a90c0235bed7a |
| institution | Kabale University |
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| language | English |
| publishDate | 2025-01-01 |
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| series | Molecules |
| spelling | doaj-art-d61fa69f85504348b66a90c0235bed7a2025-01-10T13:19:00ZengMDPI AGMolecules1420-30492025-01-0130114210.3390/molecules30010142Investigation of the Catalytic Properties of Aluminum Oxide (Al<sub>2</sub>O<sub>3</sub>) and Pyrite (FeS<sub>2</sub>) Using Thermodynamic and Kinetic ParametersAigul T. Ordabaeva0Zainulla M. Muldakhmetov1Mazhit G. Meiramov2Sergey V. Kim3Shuga B. Kasenova4Serik D. Fazylov5Institute of Organic Synthesis and Chemistry of Coal of Kazakhstan Republic, Alikhanov Str., 1, Karaganda 100012, KazakhstanInstitute of Organic Synthesis and Chemistry of Coal of Kazakhstan Republic, Alikhanov Str., 1, Karaganda 100012, KazakhstanInstitute of Organic Synthesis and Chemistry of Coal of Kazakhstan Republic, Alikhanov Str., 1, Karaganda 100012, KazakhstanInstitute of Organic Synthesis and Chemistry of Coal of Kazakhstan Republic, Alikhanov Str., 1, Karaganda 100012, KazakhstanLaboratory of Thermochemical Processes, Zh. Abishev Chemical-Metallurgical Institute, Karaganda 100009, KazakhstanInstitute of Organic Synthesis and Chemistry of Coal of Kazakhstan Republic, Alikhanov Str., 1, Karaganda 100012, KazakhstanThe kinetics of anthracene hydrogenation was studied using the method of equilibrium kinetic analysis. To determine the diffusion–kinetic characteristics, anthracene hydrogenation was performed at different temperatures (648 K, 673 K, 698 K), at a hydrogen pressure of 3 MPa in the presence of a mixture of pyrite (FeS<sub>2</sub>) and aluminum oxide (Al<sub>2</sub>O<sub>3</sub>) taken at a ratio of 1:1. Chromatographic analysis of anthracene hydrogenation products showed the presence of 9,10-dihydroanthracene (DHA), 1,2,3,4-tetrahydroanthracene (THA), methylnaphthalene (MN), naphthalene (H) and other unidentified compounds. In order to preserve the material balance, a total hydrogenation reaction of anthracene, up to 9,10-dihydroanthracene, was proposed as characterized by the highest rate in the presence of pyrite-based catalysts and aluminum oxide. Calculations of the degrees of rotation of anthracene, reaction constants, and Gibbs energy have shown that with increasing temperature, the reaction becomes more thermodynamically advantageous. Based on the obtained data, Arrhenius dependences were constructed, which made it possible to calculate the activation energies of direct (39.4 kJ/mol) and reverse (13.04 kJ/mol) reactions. Thus, based on the calculations performed, it was found that the process of anthracene hydrogenation in the presence of a mixture of pyrite and aluminum oxide proceeds mainly in the diffusion region.https://www.mdpi.com/1420-3049/30/1/142aluminum oxidehydrogenationanthracenecatalystkinetics |
| spellingShingle | Aigul T. Ordabaeva Zainulla M. Muldakhmetov Mazhit G. Meiramov Sergey V. Kim Shuga B. Kasenova Serik D. Fazylov Investigation of the Catalytic Properties of Aluminum Oxide (Al<sub>2</sub>O<sub>3</sub>) and Pyrite (FeS<sub>2</sub>) Using Thermodynamic and Kinetic Parameters Molecules aluminum oxide hydrogenation anthracene catalyst kinetics |
| title | Investigation of the Catalytic Properties of Aluminum Oxide (Al<sub>2</sub>O<sub>3</sub>) and Pyrite (FeS<sub>2</sub>) Using Thermodynamic and Kinetic Parameters |
| title_full | Investigation of the Catalytic Properties of Aluminum Oxide (Al<sub>2</sub>O<sub>3</sub>) and Pyrite (FeS<sub>2</sub>) Using Thermodynamic and Kinetic Parameters |
| title_fullStr | Investigation of the Catalytic Properties of Aluminum Oxide (Al<sub>2</sub>O<sub>3</sub>) and Pyrite (FeS<sub>2</sub>) Using Thermodynamic and Kinetic Parameters |
| title_full_unstemmed | Investigation of the Catalytic Properties of Aluminum Oxide (Al<sub>2</sub>O<sub>3</sub>) and Pyrite (FeS<sub>2</sub>) Using Thermodynamic and Kinetic Parameters |
| title_short | Investigation of the Catalytic Properties of Aluminum Oxide (Al<sub>2</sub>O<sub>3</sub>) and Pyrite (FeS<sub>2</sub>) Using Thermodynamic and Kinetic Parameters |
| title_sort | investigation of the catalytic properties of aluminum oxide al sub 2 sub o sub 3 sub and pyrite fes sub 2 sub using thermodynamic and kinetic parameters |
| topic | aluminum oxide hydrogenation anthracene catalyst kinetics |
| url | https://www.mdpi.com/1420-3049/30/1/142 |
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