TY - JOUR
T1 - Synthesis of Li 4+: X Si 1- x Fe x O 4 solid solution by dry ball milling and its highly efficient CO 2 chemisorption in a wide temperature range and low CO 2 concentrations
AU - Lara-García, Hugo A.
AU - Ovalle-Encinia, Oscar
AU - Ortiz-Landeros, José
AU - Lima, Enrique
AU - Pfeiffer, Heriberto
N1 - Publisher Copyright:
© 2019 The Royal Society of Chemistry.
PY - 2019
Y1 - 2019
N2 - To be considered a good CO 2 capture material for industrial applications, alkaline ceramics have to present several properties such as fast sorption and desorption kinetics, large sorption capacities, regenerability and stability, and a wide operating temperature range. In this sense, Li 4 SiO 4 fulfills some of these features, although it has some kinetic disadvantages at temperatures lower than 500 °C and under low CO 2 partial pressures. Herein, we show an easy an efficient way to synthesize a Fe-containing Li 4 SiO 4 solid solution (Li 4+x Si 1-x Fe x O 4 , with x ≤ 0.5); by a dry ball milling synthesis, with high CO 2 capture capacities. A synergic effect, between the microstructural features given by the proposed synthesis method and the iron content, improves the CO 2 capture exhibited by the material in different ways: (1) Li 4+x Si 1-x Fe x O 4 solid solution samples are able to trap large amounts of CO 2 between 200 and 650 °C. At 200 °C, the solid solution chemisorbs 11 wt% of CO 2 , the largest amount of CO 2 captured reported so far in the literature at this temperature; (2) iron containing samples diminish the CO 2 capture dependence on temperature; (3) CO 2 capture was considerably improved under low partial pressures of CO 2 and (4) iron redox properties enhanced the CO 2 capture, by using a low partial pressure of O 2 .
AB - To be considered a good CO 2 capture material for industrial applications, alkaline ceramics have to present several properties such as fast sorption and desorption kinetics, large sorption capacities, regenerability and stability, and a wide operating temperature range. In this sense, Li 4 SiO 4 fulfills some of these features, although it has some kinetic disadvantages at temperatures lower than 500 °C and under low CO 2 partial pressures. Herein, we show an easy an efficient way to synthesize a Fe-containing Li 4 SiO 4 solid solution (Li 4+x Si 1-x Fe x O 4 , with x ≤ 0.5); by a dry ball milling synthesis, with high CO 2 capture capacities. A synergic effect, between the microstructural features given by the proposed synthesis method and the iron content, improves the CO 2 capture exhibited by the material in different ways: (1) Li 4+x Si 1-x Fe x O 4 solid solution samples are able to trap large amounts of CO 2 between 200 and 650 °C. At 200 °C, the solid solution chemisorbs 11 wt% of CO 2 , the largest amount of CO 2 captured reported so far in the literature at this temperature; (2) iron containing samples diminish the CO 2 capture dependence on temperature; (3) CO 2 capture was considerably improved under low partial pressures of CO 2 and (4) iron redox properties enhanced the CO 2 capture, by using a low partial pressure of O 2 .
UR - http://www.scopus.com/inward/record.url?scp=85061967225&partnerID=8YFLogxK
U2 - 10.1039/c8ta12359d
DO - 10.1039/c8ta12359d
M3 - Artículo
SN - 2050-7488
VL - 7
SP - 4153
EP - 4164
JO - Journal of Materials Chemistry A
JF - Journal of Materials Chemistry A
IS - 8
ER -