We report the use of silicon oxynitrides as novel adsorbents for CO 2 capture. Three series of functionalized materials based on KCC-1, SBA-15 and MCM-41 with Si-NH 2 groups were prepared using a simple one-step process via thermal ammonolysis using ammonia gas, and they demonstrated excellent CO 2 capture capabilities. These materials overcome several limitations of conventional amine-grafted mesoporous silica. They offer good CO 2 capture capacity, faster adsorption-desorption kinetics, efficient regeneration and reuse, more crucially excellent thermal and mechanical stability even in oxidative environments, and a clean and green synthesis route, which allows the overall CO 2 capture process to be practical and sustainable. This journal is © The Royal Society of Chemistry 2012.
Bibliographical noteKAUST Repository Item: Exported on 2020-10-01
Acknowledgements: We thank King Abdullah University of Science and Technology (KAUST) for funding and support. Thanks are also due to Prof. Jean-Marie Basset, Director, KAUST Catalysis Center for his encouragement and Prof. K. Takanabe for technical support. We also thank Dr V. Unkefer for internal reviewing of the manuscript and Olga Zausalina for designing graphical images.
ASJC Scopus subject areas
- General Chemistry