TY - JOUR
T1 - Influence of the K-, Na- and K-Na-carbonate additions during the CO 2 chemisorption on lithium oxosilicate (Li8SiO 6)
AU - Romero-Ibarra, Issis C.
AU - Durán-Muñoz, Fernando
AU - Pfeiffer, Heriberto
PY - 2014/2
Y1 - 2014/2
N2 - Lithium oxosilicate (Li8SiO6) was synthesized and mechanically mixed with potassium carbonate, sodium carbonate, or a mixture of both. While the product sample composition was characterized using X-ray diffraction, the CO2 chemisorption was evaluated using dynamic (30-800°C), isothermal (350-650°C) and cyclic thermogravimetric analyses. The presence of the K, Na, or K-Na-carbonates in Li 8SiO6 changes the sorption properties in a wide temperature range. K-, Na-, K-Na-Li8SiO6 samples captured a maximum weight of 32 wt% at 400 °C, 42 wt% at 550 °C, and 38 wt% at 600 °C, respectively. The results revealed that the weight gained on Li 8SiO6 mixed with K-, Na- and K-Na-carbonates was attributed to the formation of the eutectic phases. These materials would be suitable for CO2 capture over a wide temperature range depending on the application process. Nevertheless, the cyclic experiments showed important variations in their respective efficiencies, depending on the temperature.
AB - Lithium oxosilicate (Li8SiO6) was synthesized and mechanically mixed with potassium carbonate, sodium carbonate, or a mixture of both. While the product sample composition was characterized using X-ray diffraction, the CO2 chemisorption was evaluated using dynamic (30-800°C), isothermal (350-650°C) and cyclic thermogravimetric analyses. The presence of the K, Na, or K-Na-carbonates in Li 8SiO6 changes the sorption properties in a wide temperature range. K-, Na-, K-Na-Li8SiO6 samples captured a maximum weight of 32 wt% at 400 °C, 42 wt% at 550 °C, and 38 wt% at 600 °C, respectively. The results revealed that the weight gained on Li 8SiO6 mixed with K-, Na- and K-Na-carbonates was attributed to the formation of the eutectic phases. These materials would be suitable for CO2 capture over a wide temperature range depending on the application process. Nevertheless, the cyclic experiments showed important variations in their respective efficiencies, depending on the temperature.
KW - chemisorption
KW - lithium silicate
KW - thermal analysis
UR - http://www.scopus.com/inward/record.url?scp=84893937723&partnerID=8YFLogxK
U2 - 10.1002/ghg.1402
DO - 10.1002/ghg.1402
M3 - Artículo
AN - SCOPUS:84893937723
SN - 2152-3878
VL - 4
SP - 145
EP - 154
JO - Greenhouse Gases: Science and Technology
JF - Greenhouse Gases: Science and Technology
IS - 1
ER -