N2 and CO2 Adsorption by Soils with High Kaolinite Content from San Juan Amecac, Puebla, México
AbstractCarbon dioxide (CO2) is considered one of the most important greenhouse gases in the study of climate change. CO2 adsorption was studied using the gas chromatography technique, while the Freundlich and Langmuir adsorption models were employed for processing isotherm data in the temperature range of 473–573 K. The isosteric heat of adsorption was calculated from the Clausius–Clapeyron equation. Moreover, the thermodynamic properties ΔG, ΔU, and ΔS were evaluated from the adsorption isotherms of Langmuir using the Van’t Hoff Equation. The four soil samples were recollected from San Juan Amecac, Puebla, Mexico, and their morphologies were investigated through X-ray diffraction (XRD) and N2 adsorption at 77 K. The SJA4 soil has a crystalline Kaolinite phase, which is one of its non-metallic raw materials, and N2 isotherms allowed for the determination of pore size distributions and specific surface areas of soil samples. The Barrett–Joyner–Halenda (BJH) distribution of pore diameters was bimodal with peaks at 1.04 and 3.7 nm, respectively. CO2 adsorption showed that the SJA1 soil afforded a higher amount of adsorbed CO2 in the temperature range from 453 to 573 K followed by SJA4 and finally SJA2, classifying this process as exothermic physisorption. View Full-Text
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Quiroz-Estrada, K.; Hernández-Espinosa, M.Á.; Rojas, F.; Portillo, R.; Rubio, E.; López, L. N2 and CO2 Adsorption by Soils with High Kaolinite Content from San Juan Amecac, Puebla, México. Minerals 2016, 6, 73.
Quiroz-Estrada K, Hernández-Espinosa MÁ, Rojas F, Portillo R, Rubio E, López L. N2 and CO2 Adsorption by Soils with High Kaolinite Content from San Juan Amecac, Puebla, México. Minerals. 2016; 6(3):73.Chicago/Turabian Style
Quiroz-Estrada, Karla; Hernández-Espinosa, Miguel Á.; Rojas, Fernando; Portillo, Roberto; Rubio, Efraín; López, Lucía. 2016. "N2 and CO2 Adsorption by Soils with High Kaolinite Content from San Juan Amecac, Puebla, México." Minerals 6, no. 3: 73.