中文摘要：

以十二烷基硫酸钠为模板剂，尿素为沉淀剂制备了介孔氧化镍，并将该方法成功拓展至介孔NiMgO催化剂的合成．考察了这两种催化剂以及采用溶胶一凝胶法制备的纳米氧化镍催化剂对乙烷氧化脱氢反应的催化性能．结果表明，介孔氧化镍较纳米氧化镍在相同乙烷转化率条件下乙烯选择性更高，且前者反应温区大为扩展，因而乙烯收率更高．介孔氧化镍经Mg调变后．其催化性能进一步提高，在450℃，C2H6：O2：N2=1：1：4和GHSV=18000ml／（g．h）条件下，介孔NiMgO催化剂上乙烷转化率和乙烯收率分别为56．6％和30．1％，其乙烯收率远高于纳米氧化镍（15．9％）和介孔氧化镍（22．5％）．

英文摘要：

Mesoporous nickel oxide was prepared using sodium dodecyl sulfate as the template and urea as the hydrolysis agent. The method was extended successfully to the synthesis of a mesoporous multicomponent Ni-based catalyst, NiMgO. The mesostructured catalysts were compared with a nanosized NiO catalyst prepared by a sol-gel process. These catalysts were used for oxidative dehydrogenation of ethane to ethylene. The meso-NiO showed higher ethylene selectivity than the nano-NiO at the same ethane conversion. The temperature range for the reaction on meso-NiO was larger, which gave a higher ethylene yield. The catalytic performance of meso-NiO was improved by Mg modification. On meso-NiMgO, a 56.6% ethane conversion with 30.1% ethylene yield was obtained at 450 ℃, C2H6：O2：N2 = 1：1：4, and GHSV = 18000 ml/（g.h）. This ethylene yield was much higher than the best obtained with nano-NiO （15.9%） or meso-NiO （22.5%）.