https://doi.org/10.1016/j.fuel.2022.123420
“The Li, Na, K-doped MgO adsorbent was prepared using a method reported by Harada et al. [38]. Firstly, 9.713 g 4MgCO3·Mg(OH)2·5H2O (>99%, Sigma-Aldrich), 0.207 g LiNO3 (>99%, Sigma-Aldrich), 0.153 g NaNO3 (>99%, Sigma-Aldrich), and 0.526 g KNO3 (>99%, Sigma-Aldrich) were added into 40 ml deionized water with stirring at room temperature for 60 min. The obtained white slurry was dried at 110 °C overnight and then calcined at 450 °C for 4 h. The combined materials were prepared by physically mixing the Li, Na, K-doped MgO sorbent and the reduced Ru/CeO2 catalysts in a mortar with a 2:1 mass ratio. The obtained combined materials were donated as Ru/rod-CeO2-MgO, Ru/particle-CeO2-MgO, and Ru/cube-CeO2-MgO, respectively.”