Browsing by Author "Ayas, Nezihe"

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Synthesis of Pd/Tio2 Catalyst and Determination of Its Activity in Hydrogen Production From Sodium Borohydride
(Konya Technical University, 2021) Dönmez, Fahriye; Ayas, Nezihe
Hydrogen is an environmentally friendly energy carrier that can be a sustainable solution to the increasing energy demand, produced from renewable energy sources. For the storage and transmission of hydrogen, metal borohydrides stand out with their hydrogen storage capacities. In this study, Pd/TiO2 catalyst was synthesized by sol-gel method and characterized by X-Ray Diffractometry (XRD), Brunauer, Emmett-Teller (BET), X-Ray Fluorescence (XRF), Scanning Electron Microscope- Energy Dispersive X?Ray (SEM-EDX) techniques. The activity studies of the synthesized catalyst were carried out in the hydrolysis reaction of NaBH4 to produce hydrogen. Experimental studying conditions were determined as 100 mg NaBH4, 100 mg catalyst, 5 mL 0.25 M NaOH and three different reaction temperature parameters (20, 40 and 60 oC) were tested. The highest hydrogen yield (100%) and hydrogen production rate (102 mL/gcat.min) were obtained at 60 oC reaction temperature. In the reusability tests of the catalyst, a decrease in activity was observed after the first 4 uses. By applying the nth order reaction kinetics model to the NaBH4 hydrolysis reaction, the reaction rate degree was determined to be 0.7. The activation energy was calculated as 33.23 kJ/mol with the Arrhenius equation.