Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
6645242 | Fuel | 2012 | 5 Pages |
Abstract
In this study a synthetic calcium oxide sorbent was prepared using a sol-gel synthesis method. The synthesized CaO and a reference CaO, obtained through the calcination of commercial CaCO3, were characterized by means of X-ray diffraction, N2 adsorption and SEM microscopy. For the reference CaO, results from cyclic carbonation and calcination showed the typical behavior described in the literature. Conversely, the synthetic CaO, with a coral like morphology and higher surface area (45Â m2/g), maintained its reactivity throughout 18 cycles, losing 55% over 70 consecutive cycles, with a residual reactivity value of 0.24Â gCO2/gCaO. The morphology and structural changes of the synthesized CaO sample were examined and a deactivation mechanism was suggested.
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Chemical Engineering (General)
Authors
E.T. Santos, C. AlfonsÃn, A.J.S. Chambel, A. Fernandes, A.P. Soares Dias, C.I.C. Pinheiro, M.F. Ribeiro,