The Hydroloysis of ammonia borane by using Amberlyst-15 supported catalysts for hydrogen generation |
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Authors: | Derya Öncel Özgür Tayyibe ?im?ek Göksel Özkan Meryem Sena Akku? Gülay Özkan |
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Affiliation: | 1. Department of Chemical Engineering, Gazi University, 06570, Maltepe, Ankara, Turkey;2. Department of Chemical Engineering, Ankara University, 06100, Tando?an, Ankara, Turkey |
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Abstract: | Resin catalysts have the advantage of having various properties and long lifetime due to their ability to be regenerated easily, which makes them attractive supports. In this paper, a comparative study was conducted to optimize the dehydrogenation reaction condition using two different types of support materials: alumina (Al2O3), and Amberlyst-15 and to improve the catalytic activity as well as preparing an efficient and low-cost system for practical application, ruthenium metal catalyst was incorporated on Amberlyst-15 resin (a sulfonic acid type based upon a styrene-divinylbenzene copolymer) to release H2 via hydrolytic dehydrogenation of ammonia borane. Using ruthenium (Ru) catalysts based on Amberlyst-15 support material and comparing the results with Al2O3 as the common supporting material is considered to be studied for the first time. The effect of temperature (20–50 °C), the initial ammonia borane concentration (0.05–0.5 %wt), and catalyst amount (0.2–0.5 g) on the produced H2 yield was also investigated. Ru@Amberlyst-15 nanoparticle was discovered to be an effective catalyst for hydrogen evolution via the hydrolysis of ammonia borane with a turnover frequency value (TOF) of 343.3 min?1, while Ru@Al2O3 yielded a TOF of 87.5 min?1 at the room temperature. Therefore, it can be concluded that the Amberlyst-15 supporting effect on ruthenium metal leads an increase in the hydrogen production rate. |
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Keywords: | Catalytic hydrolysis Ammonia borane Amberlyst-15 Kinetics |
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