Silva Ribeiro, T. R.; de Melo Silva, D. C.; Pereira Martins da Costa, T.; Sousa da Silva, A. O. INCORPORATION OF ALKALINE-EARTH METALS Ca, Mg, Ba and Sr IN MCM-41 FOR APPLICATION AS CO2 ADSORVENTS IN THE PRE-SALES NATURAL GAS CURRENTS. J. Eng. Exact Sci. 2019, 5, 0148-0152.