Development Of Catalysts Of Mesoporous For The Productıon Of Hydrogen By The Dry Reformıng Reactıon Of Methane

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Thesis Type: Postgraduate

Institution Of The Thesis: Gazi University, Fen Bilimleri Enstitüsü, -, Turkey

Approval Date: 2019

Thesis Language: Turkish

Student: BERNA ERDOĞAN

Supervisor: NAİL YAŞYERLİ

Open Archive Collection: AVESIS Open Access Collection

Abstract:

The aim of this study is to develop an active, stable and carbon-resistant mesoporous catalysts for the production of hydrogen through the dry reforming reaction of methane. For this purpose, pure SBA-15 material was synthesized using a hydrothermal method as a support material. Monometalic (Ni or Co) and bimetallic (Ni-Co) catalysts were prepared by impregnation method. The activities of the prepared catalysts in the dry reforming reaction of methane were investigated in the fixed bed reactor system. The catalysts were characterized by XRD, TPR, N2 adsorption-desorption, SEM, TEM and TG/DT techniques before and/or after activity tests.. The N2 adsorption-desorption isotherms of the catalysts were consistent with Type IV isotherm, indicating formation of mesoporous structures. TEM images of bimetallic catalysts clearly proved the presence of characteristic honeycomb structure. Incorporation Co into the structure of the Ni based catalysts inhibited the sintering of the nickel particles due to formation of a Ni-Co alloy. Activity test results showed that bimetallic Ni-Co catalysts gave highly promising results. Bimetallic catalyst decreased the coke significantly. The SEM images and XRD patterns of the spent catalysts were consistent with TGA/DT results.