Kiim Taegyu, Park Daeil
J Nanosci Nanotechnol. 2017 Apr;17(4):2567-570.
Direct conversion of methane over oxide-type catalysts supported on mesoporous material under the dielectric barrier discharge plasma was investigated in the present study. The oxide catalysts (MgO and NiO) supported on SBA-15 was prepared by a hydrothermal and wet-impregnation method. The low-angle XRD patterns and TEM indicate that the ordered mesoporous structure was well maintained during the catalyst preparation and reaction processes. We also conducted direct conversion of methane using the catalysts under the plasma. As a result, the specific surface area of bare SBA-15 was much higher than that of the NiO/SBA-15, followed by MgO/SBA-15. Overall, the CH₄ conversion increased with increasing the specific surface area. And C₂ selectivity decreased with increasing the specific surface area.
本研究考察了在介质阻挡放电等离子体作用下，负载于介孔材料上的氧化物型催化剂对甲烷的直接转化。采用水热法和湿浸渍法制备了负载于SBA-15上的氧化物催化剂（MgO和NiO）。低角度XRD图谱和TEM表明，在催化剂制备和反应过程中，有序介孔结构得到了良好的保持。我们还在等离子体条件下使用这些催化剂进行甲烷的直接转化。结果表明，裸SBA-15的比表面积远高于NiO/SBA-15，其次是MgO/SBA-15。总体而言，CH₄转化率随比表面积的增加而提高，C₂选择性随比表面积的增加而降低。
