Journal of Nanomedicine & Nanotechnology

Rapid preparation, characterization and catalytic decomposition of N2O over pure and alkali-doped Co3O4/MCM-41 nano-composites

2^nd International Conference on Nanotek and Expo

December 3-5, 2012 DoubleTree by Hilton Philadelphia Center City, USA

T.H. Mansoure, M.Th. Makhlouf and B.M. Abu-Zied

Posters: J Nanomed Nanotechol

Abstract:

Nitrous oxide is an environmental pollutant, owing to its potential involvement in stratospheric destruction of the ozone layer by being a strong greenhouse gas. According to Kyoto Protocol of the United Nations Convention on Climate Change, N 2 O stands as the second non-CO 2 greenhouse gas having a global worming potential of 310 equivalents to CO 2 . The continuous increase in its concentration in the atmosphere, both due to natural and anthropogenic sources (0.2?0.3% per year) and longer atmospheric residence time (150 years) enforce us to develop efficient catalysts for its decomposition into nitrogen and oxygen to protect our global environment. Therefore, there is a need for further studies on the development of the catalysts from the following two points of view: (i) to find new active catalyst and (ii) to improve its activity and stability towards the inhibitory gases. In this investigation, direct decomposition of nitrous oxide (N 2 O) on pure and alkali-doped Co 3 O 4 /MCM-41 nano-composite catalysts was examined. It was found that the activity of the Co 3 O 4 /MCM-41 catalyst strongly depended on the amount of Co 3 O 4 loading. The influence of alkali cation promoters (Li, Na, K, and Cs) on the activity of the most active catalyst in the Co 3 O 4 / MCM-41 series, i.e. with Co 3 O 4 loading of 30 wt. %, was also investigated. The sequence of the promotional effect was found to be: un-promoted < Li < Cs < Na < K-promoted catalyst. The reason for the increase in activity for the added alkali cations was electronic in nature

Biography :

Tharwat Hassan Mohammed Mansoure is master student at Chemistry Department - Faculty of Science - Assiut University, he get my master degree during three months from now. He have participated in three international conferences through the last year, one of them in Poland. He have three papers under publication in international journals in the field of catalysis and preparation of nano-materials