Cupper based catalyst development for methanol steam reformining process

Thesis Type: Post Graduate

Institution Of The Thesis: Gazi Üniversitesi, Fen Bilimleri Enstitüsü, Turkey

Approval Date: 2014




Using methanol as a hydrogen source for fuel-cell applications is a favorable solutions to supply hydrogen on board in comparison to other hydrocarbon fuels, because of the following reasons: low temperature (250 °C) in steam reforming of methanol (SRM), high hydrogen to carbon ratio, low CO formation, and zero emission of NOx, SOx. There are possible processes for hydrogen production from methanol for example decomposition, steam reforming, partial oxidation, and combined reforming (also called oxidative steam reforming) of methanol. A higher hydrogen yield is obtained in steam reforming compared to partial oxidation and oxidative steam reforming. In order to improve the activity, long term stability, and reduced CO formation, catalyst consisting of copper supported on ZrO2 was synthesized using three preparation method. The morphology and porosity of zirconia can be readily controlled and resulting material with high surface area. The small copper particles formed during reduction of the catalyst stay well separated by the ZrO2support, preventing sintering and loss of copper surface area with time on stream. Catalytic production of hydrogen by steam reforming of methanol reaction developed on three types of copper based catalysts (Cu/ZrO2, Cu/ZrO2/Al2O3,). These catalysts prepared by two different ways: sol-gel, coprecipitation techniques. In each Method we changed the ratio of copper contain (5% Cu, 8%Cu & 11% Cu) to also examine the copper ratio effect on the decomposition reaction of the methanol steam reforming. Structural characterization have been tested by means of X-ray powder diffraction (XRD) and specific surface area (BET), The catalysts were tested at atmospheric pressure in a fixed bed micro reactor. Effect of the preparation method and copper ratio was investigated.