Preparation and kinetic analysis of Li4SiO4 sorbents with different silicon sources for high temperature CO2 capture
Using diatomite and analytical pure SiO 2 as silicon sources, Li 4 SiO 4 sorbents for high temperature CO 2 capture were prepared through solid-state reaction method. Phase composition was analyzed by X-ray diffraction, and the CO 2 absorption capacity and absorptoin-desorption performance were stud...
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Published in | Chinese science bulletin Vol. 57; no. 19; pp. 2475 - 2479 |
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Main Authors | , , , , , |
Format | Journal Article |
Language | English |
Published |
Heidelberg
SP Science China Press
01.07.2012
|
Subjects | |
Online Access | Get full text |
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Summary: | Using diatomite and analytical pure SiO
2
as silicon sources, Li
4
SiO
4
sorbents for high temperature CO
2
capture were prepared through solid-state reaction method. Phase composition was analyzed by X-ray diffraction, and the CO
2
absorption capacity and absorptoin-desorption performance were studied by the simultaneous thermal thermogravimetric analyzer (TG-DSC). The results showed that silicon source had an important influence on CO
2
absorption properties. The kinetic parameters for the chemisorption and diffusion processes were obtained by the isothermal study for different silicon sources. The results showed that the activation energies for these two processes were estimated to be 105.427 and 35.928 kJ/mol for the sample with analytical pure SiO
2
(AS). While for the sample with diatomite (DS), the activation energies for these two processes were estimated to be 78.500 and 20.439 kJ/mol, respectively. |
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ISSN: | 1001-6538 1861-9541 |
DOI: | 10.1007/s11434-012-5188-x |