Dry reforming of methane was studied over Ni,Y-promoted KIT-6 ordered mesoporous silicas, prepared by incipient impregnation (nickel content 12 wt%, yttrium content of 4 wt%, 8 wt% or 12 wt%). The catalysts were characterized by XRF, FT-IR, TGA/DSC-MS, N₂-adsorption, TEM, HRTEM, XRD and TPR-H₂. The promotion with 8 wt% Y (Y/Si = 0.05) resulted in the highest activity and H₂/CO molar ratio closer to the stoichiometric value at temperatures from 600 to 750 °C. The characterization results of the yttrium promoted materials showed higher reducibility of the bulk NiO, bigger Ni crystallite size after reduction and DRM test, and better dispersion of nickel in the channels of the KIT-6 support. Additionally, larger Ni particles were observed on the external surface of the support, which may be related to catalytic selectivity towards carbon forming reactions. Upon dry methane reforming the segregated phases of Niº, Y₂O₃, and possibly Y₂Si₂O₇ were registered. No presence of a Ni,Y alloy was observed.

在通过初始浸渍（镍含量为12 wt％，钇含量为4 wt％，8 wt％或12 wt％）制备的Ni，Y促进的KIT-6有序介孔二氧化硅上研究了甲烷的干重整。通过XRF，FT-IR，TGA / DSC-MS，N ₂吸附，TEM，HRTEM，XRD和TPR-H ₂对催化剂进行了表征。Y含量为8 wt％（Y / Si = 0.05）时，活性最高，H ₂含量最高/ CO摩尔比在600至750°C的温度下更接近化学计量值。钇促进材料的表征结果显示，块状NiO的还原性更高，还原和DRM测试后，Ni微晶尺寸更大，并且镍在KIT-6载体通道中的分散性更好。另外，在载体的外表面上观察到较大的Ni颗粒，这可能与对碳形成反应的催化选择性有关。经干甲烷重整后，记录了Niº，Y ₂ O ₃和可能的Y ₂ Si ₂ O ₇的偏析相。没有观察到Ni，Y合金的存在。