TY - JOUR
T1 - Structural and thermochemical chemisorption of CO 2 on Li 4+x(Si 1-xAl x)O 4 and Li 4-x(Si 1-xV x)O 4 solid solutions
AU - Ortiz-Landeros, José
AU - Gómez-Yáñez, Carlos
AU - Palacios-Romero, Luis M.
AU - Lima, Enrique
AU - Pfeiffer, Heriberto
PY - 2012/3/29
Y1 - 2012/3/29
N2 - Different Li 4SiO 4 solid solutions containing aluminum (Li 4+x(Si 1-xAl x)O 4) or vanadium (Li 4-x(Si 1-xV x)O 4) were prepared by solid state reactions. Samples were characterized by X-ray diffraction and solid state nuclear magnetic resonance. Then, samples were tested as CO 2 captors. Characterization results show that both, aluminum and vanadium ions, occupy silicon sites into the Li 4SiO 4 lattice. Thus, the dissolution of aluminum is compensated by Li 1+ interstitials, while the dissolution of vanadium leads to lithium vacancies formation. Finally, the CO 2 capture evaluation shows that the aluminum presence into the Li 4SiO 4 structure highly improves the CO 2 chemisorption, and on the contrary, vanadium addition inhibits it. The differences observed between the CO 2 chemisorption processes are mainly correlated to the different lithium secondary phases produced in each case and their corresponding diffusion properties.
AB - Different Li 4SiO 4 solid solutions containing aluminum (Li 4+x(Si 1-xAl x)O 4) or vanadium (Li 4-x(Si 1-xV x)O 4) were prepared by solid state reactions. Samples were characterized by X-ray diffraction and solid state nuclear magnetic resonance. Then, samples were tested as CO 2 captors. Characterization results show that both, aluminum and vanadium ions, occupy silicon sites into the Li 4SiO 4 lattice. Thus, the dissolution of aluminum is compensated by Li 1+ interstitials, while the dissolution of vanadium leads to lithium vacancies formation. Finally, the CO 2 capture evaluation shows that the aluminum presence into the Li 4SiO 4 structure highly improves the CO 2 chemisorption, and on the contrary, vanadium addition inhibits it. The differences observed between the CO 2 chemisorption processes are mainly correlated to the different lithium secondary phases produced in each case and their corresponding diffusion properties.
UR - http://www.scopus.com/inward/record.url?scp=84859228449&partnerID=8YFLogxK
U2 - 10.1021/jp3006298
DO - 10.1021/jp3006298
M3 - Artículo
C2 - 22394351
SN - 1089-5639
VL - 116
SP - 3163
EP - 3171
JO - Journal of Physical Chemistry A
JF - Journal of Physical Chemistry A
IS - 12
ER -