Research Information System
Thesis Type: Postgraduate
Institution Of The Thesis: Gazi Üniversitesi, Fen Bilimleri Enstitüsü, Turkey
Approval Date: 2019
Thesis Language: Turkish
Student: BÜŞRA ERYILDIRIM
Supervisor: NURAY OKTAR
Abstract:In the scope of master thesis, COx-free pure hydrogen, an alternative energy carrier, and ethylene, which is an important raw material for the petrochemical industry, were produced by ethane dehydrogenation installing high-technological reactor systems. In this study, SBA-15 and Zr-SBA-15 supported catalysts with high surface area containing Cr or Mo were synthesized. The structural and physical properties of the prepared catalysts were determined by N2 adsorption-desorption, XRD, TPR, SEM, EDS, ICP-MS and TG analysis. The activity tests of the catalysts were carried out at different temperature (400-750℃) in the conventional heated reactor system and in the microwave heated reactor system, which provides energy efficiency by reaching high temperatures with low energy utilization. In the presence of 5Cr@SBA-15 catalyst, ethane conversion below 650℃ in the conventional heated reactor system was negligible, while almost complete conversion was achieved at 650℃ in the microwave heated reactor system and also, ethane conversion was achieved even at 400℃. Over the 5Cr@SBA-15 and 5Mo@SBA-15 catalysts, ethane conversion values obtained at 650℃ in conventional heated reactor system were reached at 450℃ in microwave heated reactor system. The low ethylene yield of the 5Mo@SBA-15 catalyst in the conventional heated reactor system was increased by using the microwave heated reactor system. Heat losses during transmission and convection mechanisms in conventional heated systems can be prevented by sending microwave energy directly to the catalyst and generating heat from the internal volume of the material, and microplasmas (hot spot) formed on the catalyst allow high conversion values to be reached in microwave heated system. In this study, hydrogen and ethylene were produced by providing high energy savings compared to conventional heating systems using microwave energy. In addition, high concentration hydrogen was produced by using Pd containing membrane reactor system.