A study on the ball-milling effect of calcined Mg-Al hydrotalcite on the CO2 adsorption behavior

다국어 초록 (Multilingual Abstract)

We have investigated the effect of ball-milling over calcined Mg-Al hydrotalcite, with regard to its CO2 adsorption capacity. The prepared materials were systematically characterized by X-ray diffraction, scanning electron microscopy and N2 physisorption measurements. The results reveal an excellent adsorption capacity of CO2 by calcined Mg-Al hydrotalcite; however, when this adsorbent was treated by ball-milling for 2 h, a slight decrease in its CO2 adsorption capacity was observed, mainly attributable to the decreased surface area, total pore volume, pore size and the formation of particle aggregates of the aforementioned hydrotalcite. Therefore, alterations in structure, texture and morphology of calcined Mg-Al hydrotalcite during the ball-milling treatment do not optimize its CO2 adsorption capacity.

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