采用两步浸渍法制备了Mg-Ce-SBA-15介孔分子筛，并对其结构和酸性能进行了表征。在小型固定床反应装置上进行苯酚甲醇烷基化反应。考察了Mg的负载量、反应温度、空速、酚醇摩尔比等反应条件对苯酚烷基化反应的影响。结果表明，改性分子筛仍具有介孔分子筛的结构和合适的酸性；当Mg负载量为7%、温度为460℃、酚醇摩尔比为3、空速为3.0 h^-1时，苯酚的转化率最高，为80.1%，邻甲酚的选择性最好，为86.4%。

Mg-Ce-SBA-15 mesoporous molecular sieve is prepared via two-step impregnation method and is characterized in the aspects of structure and acidic property.The samples are evaluated through alkylation reaction between phenol and methanol conducted in a fixed-bed reactor.The influences of Mg content, reaction temperature, molar ratio of methanol/phenol and WHSV on the alkylation are investigated.The results indicate that Mg-Ce-SBA-15 has a structure of mesoporous molecular sieve and appropriate acidity, and both the conversation of phenol and the selectivity of o-cresol reach the highest, 80.1% and 86.4% respectively when the content of Mg is 7%, temperature is at 460℃, phenol/methanol molar ratio is 3 and WHSV is 3 h^-1.

李艳歌(1992-),女,硕士研究生,研究方向为清洁燃料生产,1343789624@qq.com。