Modern Chemistry & Applications

Use of high surface area of mesoporous materials for high purity hydrogen production

Joint Event on 19^th International Conference on Medicinal Chemistry & Multi Targeted Drug Delivery & International Conference on Catalysis and Pyrolysis

November 05-06, 2018 | San Francisco, USA

Sujitra Wongkasemjit

Chulalongkorn University, Thailand

Keynote: Mod Chem Appl

Abstract:

High purity H2 is necessary for proton exchange membrane (PEM) fuel cells and preferential oxidation of carbon monoxide (CO-PROX) is widely used for this purpose because of its low cost and ability to reduce CO content to less than 10ppm without excess H2 consumption. In this work, high surface areas of mesoporous ceria-zirconia (CeO2-ZrO2) and mesoporous ceria-titania (CeO2-TiO2) were successfully prepared via nano casting process using the siliceous MCM-48 mesoporous material as a hard template. The synthesized mesoporous CeO2-TiO2 and CeO2-ZrO2 provided an ordered structure with the high specific surface area around 200 and 260m2g-1, respectively. These two synthesized mesoporous materials were characterized by X-ray diffraction (XRD), Transmission electron microscopy (TEM) and N2 adsorption-desorption. Copper (Cu) loaded onto the mesoporous CeO2-TiO2 and CeO2-ZrO2 supports by deposition-precipitation (DP) method exhibited high dispersion of Cu species, as confirmed by XRD. The structures and properties of the synthesized Cu-CeO2-TiO2 and Cu-CeO2-ZrO2 catalysts play a crucial role in interesting catalytic applications, such as preferential oxidation of CO (CO-PROX). The Cu-CeO2-TiO2 and Cu-CeO2-ZrO2 catalysts showed good potential for CO-PROX reaction with 100% CO conversion at 130�C. Both catalysts also exhibited excellent stability after 48h. It can be concluded that the prepared mesoporous CeO2-TiO2 and CeO2-ZrO2 by nano casting pathway are promising candidates to be used as support for the H2 production application.

Biography :

Sujitra Wongkasemjit has her expertise in advanced material synthesis and passion in improving environment. Her research goal is to support the environmental protection policy. With 30 years of her career, more than 130 publications in international peer review journals, two books and more than 200 international presentations have been achieved. At least 10 research awards were given to her. She has built experiences in both research and teaching in university.

E-mail: dsujitra@chula.ac.th