A Promising Catalyst for the Dehydrogenation of Perhydro-Dibenzyltoluene: Pt/Al<sub>2</sub>O<sub>3</sub> Prepared by Supercritical CO<sub>2</sub> Deposition
Pt/Al<sub>2</sub>O<sub>3</sub> catalysts prepared via supercritical deposition (SCD), with supercritical CO<sub>2</sub>, wet impregnation (WI) methods and a selected benchmark catalyst, were evaluated for the dehydrogenation of perhydro-dibenzyltoluene (H18-DBT) a...
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MDPI AG
2022-04-01
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| author | Phillimon Modisha Rudaviro Garidzirai Hande Güneş Selmi Erim Bozbag Sarshad Rommel Erdal Uzunlar Mark Aindow Can Erkey Dmitri Bessarabov |
| author_facet | Phillimon Modisha Rudaviro Garidzirai Hande Güneş Selmi Erim Bozbag Sarshad Rommel Erdal Uzunlar Mark Aindow Can Erkey Dmitri Bessarabov |
| author_sort | Phillimon Modisha |
| collection | DOAJ |
| description | Pt/Al<sub>2</sub>O<sub>3</sub> catalysts prepared via supercritical deposition (SCD), with supercritical CO<sub>2</sub>, wet impregnation (WI) methods and a selected benchmark catalyst, were evaluated for the dehydrogenation of perhydro-dibenzyltoluene (H18-DBT) at 300 °C in a batch reactor. After ten dehydrogenation runs, the average performance of the catalyst prepared using SCD was the highest compared to the benchmark and WI-prepared catalysts. The pre-treatment of the catalysts with the product (dibenzyltoluene) indicated that the deactivation observed is mainly due to the adsorbed H0-DBT blocking the active sites for the reactant (H18-DBT). Furthermore, the SCD method afforded a catalyst with a higher dispersion of smaller sized Pt particles, thus improving catalytic performance towards the dehydrogenation of H18-DBT. The particle diameters of the SCD- and WI-prepared catalysts varied in the ranges of 0.6–2.2 nm and 0.8–3.4 nm and had average particle sizes of 1.1 nm and 1.7 nm, respectively. Energy dispersive X-ray spectroscopy analysis of the catalysts after ten dehydrogenation runs revealed the presence of carbon. In this study, improved catalyst performance led to the production of more liquid-based by-products and carbon material compared to catalysts with low catalytic performance. |
| first_indexed | 2024-03-10T03:11:43Z |
| format | Article |
| id | doaj.art-892701b18e8a44ddba265f57bcf80069 |
| institution | Directory Open Access Journal |
| issn | 2073-4344 |
| language | English |
| last_indexed | 2024-03-10T03:11:43Z |
| publishDate | 2022-04-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Catalysts |
| spelling | doaj.art-892701b18e8a44ddba265f57bcf800692023-11-23T10:25:36ZengMDPI AGCatalysts2073-43442022-04-0112548910.3390/catal12050489A Promising Catalyst for the Dehydrogenation of Perhydro-Dibenzyltoluene: Pt/Al<sub>2</sub>O<sub>3</sub> Prepared by Supercritical CO<sub>2</sub> DepositionPhillimon Modisha0Rudaviro Garidzirai1Hande Güneş2Selmi Erim Bozbag3Sarshad Rommel4Erdal Uzunlar5Mark Aindow6Can Erkey7Dmitri Bessarabov8HySA Infrastructure Centre of Competence, Faculty of Engineering, North-West University, Private Bag X6001, Potchefstroom Campus, Potchefstroom 2520, South AfricaHySA Infrastructure Centre of Competence, Faculty of Engineering, North-West University, Private Bag X6001, Potchefstroom Campus, Potchefstroom 2520, South AfricaDepartment of Chemical and Biological Engineering, Koç University, Sarıyer, 34450 Istanbul, TurkeyDepartment of Chemical and Biological Engineering, Koç University, Sarıyer, 34450 Istanbul, TurkeyDepartment of Materials Science and Engineering, Institute of Material Science, University of Connecticut, Storrs, CT 06269-3136, USADepartment of Chemical Engineering, Izmir Institute of Technology, Urla, 35430 Izmir, TurkeyDepartment of Materials Science and Engineering, Institute of Material Science, University of Connecticut, Storrs, CT 06269-3136, USADepartment of Chemical and Biological Engineering, Koç University, Sarıyer, 34450 Istanbul, TurkeyHySA Infrastructure Centre of Competence, Faculty of Engineering, North-West University, Private Bag X6001, Potchefstroom Campus, Potchefstroom 2520, South AfricaPt/Al<sub>2</sub>O<sub>3</sub> catalysts prepared via supercritical deposition (SCD), with supercritical CO<sub>2</sub>, wet impregnation (WI) methods and a selected benchmark catalyst, were evaluated for the dehydrogenation of perhydro-dibenzyltoluene (H18-DBT) at 300 °C in a batch reactor. After ten dehydrogenation runs, the average performance of the catalyst prepared using SCD was the highest compared to the benchmark and WI-prepared catalysts. The pre-treatment of the catalysts with the product (dibenzyltoluene) indicated that the deactivation observed is mainly due to the adsorbed H0-DBT blocking the active sites for the reactant (H18-DBT). Furthermore, the SCD method afforded a catalyst with a higher dispersion of smaller sized Pt particles, thus improving catalytic performance towards the dehydrogenation of H18-DBT. The particle diameters of the SCD- and WI-prepared catalysts varied in the ranges of 0.6–2.2 nm and 0.8–3.4 nm and had average particle sizes of 1.1 nm and 1.7 nm, respectively. Energy dispersive X-ray spectroscopy analysis of the catalysts after ten dehydrogenation runs revealed the presence of carbon. In this study, improved catalyst performance led to the production of more liquid-based by-products and carbon material compared to catalysts with low catalytic performance.https://www.mdpi.com/2073-4344/12/5/489supercritical depositionwet impregnationsupercritical CO<sub>2</sub>liquid organic hydrogen carriersdibenzyltoluenedehydrogenation |
| spellingShingle | Phillimon Modisha Rudaviro Garidzirai Hande Güneş Selmi Erim Bozbag Sarshad Rommel Erdal Uzunlar Mark Aindow Can Erkey Dmitri Bessarabov A Promising Catalyst for the Dehydrogenation of Perhydro-Dibenzyltoluene: Pt/Al<sub>2</sub>O<sub>3</sub> Prepared by Supercritical CO<sub>2</sub> Deposition Catalysts supercritical deposition wet impregnation supercritical CO<sub>2</sub> liquid organic hydrogen carriers dibenzyltoluene dehydrogenation |
| title | A Promising Catalyst for the Dehydrogenation of Perhydro-Dibenzyltoluene: Pt/Al<sub>2</sub>O<sub>3</sub> Prepared by Supercritical CO<sub>2</sub> Deposition |
| title_full | A Promising Catalyst for the Dehydrogenation of Perhydro-Dibenzyltoluene: Pt/Al<sub>2</sub>O<sub>3</sub> Prepared by Supercritical CO<sub>2</sub> Deposition |
| title_fullStr | A Promising Catalyst for the Dehydrogenation of Perhydro-Dibenzyltoluene: Pt/Al<sub>2</sub>O<sub>3</sub> Prepared by Supercritical CO<sub>2</sub> Deposition |
| title_full_unstemmed | A Promising Catalyst for the Dehydrogenation of Perhydro-Dibenzyltoluene: Pt/Al<sub>2</sub>O<sub>3</sub> Prepared by Supercritical CO<sub>2</sub> Deposition |
| title_short | A Promising Catalyst for the Dehydrogenation of Perhydro-Dibenzyltoluene: Pt/Al<sub>2</sub>O<sub>3</sub> Prepared by Supercritical CO<sub>2</sub> Deposition |
| title_sort | promising catalyst for the dehydrogenation of perhydro dibenzyltoluene pt al sub 2 sub o sub 3 sub prepared by supercritical co sub 2 sub deposition |
| topic | supercritical deposition wet impregnation supercritical CO<sub>2</sub> liquid organic hydrogen carriers dibenzyltoluene dehydrogenation |
| url | https://www.mdpi.com/2073-4344/12/5/489 |
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