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Applied Surface Science, Volume 328, Feb 2015, Pages 548-553.
Soria-Hoyo1, J.M. Valverde1, J.R. van Ommen2, P.E. Sánchez-Jiménez3, L.A. Pérez-Maqueda3, M.J. Sayagués3
- Facultad de Física, Universidad de Sevilla, Avda. Reina Mercedes s/n, 41012 Sevilla, Spain and
- Department of Chemical Engineering, Delft University of Technology, Product and Process Engineering, Julianalaan 136, 2628 BL Delft, The Netherlands and
- Instituto de Ciencia de Materiales (CSIC – Universidad de Sevilla), Americo Vespucio 49, 41092 Sevilla, Spain.
Abstract
CaO has been deposited on a nanosilica powder matrix by a procedure based on atomic layer deposition (ALD) in a fluidized bed reactor at atmospheric pressure following a potentially scalable process. In previous works ALD in gas fluidized bed has been mostly performed under reduced pressure, which hampers scaling-up the production technology. The material synthesized in the present work is tested as CO2 solid sorbent at calcium looping conditions. Multicyclic thermogravimetric analysis (TGA) shows that the nanosilica support stabilizes the capture capacity of CaO. EDX-STEM analysis illustrates the presence of Ca well distributed on the surface of the SiO2 nanoparticles.
