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• W3083779715 startingPage "1558" @default.
• W3083779715 abstract "K-doped lithium silicates were synthesized as CO2 sorbents using rice husks as silica source. Two different doping methods were used to prepare the solids, incipient wetness impregnation and co-impregnation. Noticeable differences were observed between the sorbents obtained by each route. Unlike the co-impregnated sample, a KLi3SiO4 phase was detected by XRD in the doped-samples prepared by incipient wetness impregnation. This phase was associated with a porous layer deposition over the sorbent particle surface, which was observed by SEM. The effect of CO2 partial pressure and sorption temperature was evaluated for the solids. A remarkable improvement of the capture efficiency was observed in the doped-samples, especially at low temperature and CO2 partial pressure. The kinetics of the samples was studied using the double exponential model and operando Raman and DRIFT spectroscopies. Different reactivity properties were found depending on the synthesis method employed. The complete analysis of the results allowed us to propose a transformation mechanism for the solids during the sorption step, highlighting the improvement of surface reaction and volumetric diffusion processes in the CO2 capture step." @default.
• W3083779715 created "2020-09-14" @default.
• W3083779715 creator A5027495675 @default.
• W3083779715 creator A5068668437 @default.
• W3083779715 creator A5006341564 @default.
• W3083779715 date "2021-01-01" @default.
• W3083779715 modified "2023-10-06" @default.
• W3083779715 title "K-doping effect in the kinetics of CO2 capture at high temperature over lithium silicates obtained from rice husks: In situ/operando techniques" @default.
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• W3083779715 doi "https://doi.org/10.1016/j.ceramint.2020.08.269" @default.
• W3083779715 hasPublicationYear "2021" @default.
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