通过0.2 mol/L氢氧化钠溶液处理Beta微孔沸石制备多级孔道结构Beta沸石分子筛，并应用于正庚烷异构化反应。利用XRD、FT-IR、低温氮气吸脱附和NH₃-TPD等表征方法对样品进行表征。考察了反应温度、反应压力、空速对异构化反应转化率和选择性的影响，并得出最佳的反应条件：反应温度为240℃、反应压力为101.3 kPa、质量空速为2.46 h^-1。在该反应条件下对催化剂进行评价，结果表明，以多级孔道结构Beta分子筛为载体的催化剂的催化性能优于微孔Beta分子筛，这归结于多级孔道结构Beta分子筛集合了介孔结构优越的扩散性能和Beta沸石微孔材料优良的酸性质。

Hierarchical porous Beta zeolites are synthesized by treating with Beta microporous zeolite in a 0.2 M NaOH aqueous solution and are applied to catalyze the hydroisomerization reaction of n-heptane.The samples are characterized by XRD,FT-IR,low temperature nitrogen adsorption/desorption isotherms,NH₃-TPD and other analytical methods.The effects of reaction temperature,reaction pressure and space velocity on the conversion and selectivity of isomerization reaction are investigated in a fixed bed micro reactor.The best reaction conditions are concluded as follows:240℃ for reaction temperature,101.3 KPa for reaction pressure and 2.46 h^-1 for mass space velocity,under which the catalyst is evaluated.The results demonstrate that the hierarchical porous Beta zeolite based catalyst shows better catalytic performance than that based by microporous Beta zeolite,which is due to hierarchical porous Beta zeolite's superior mass transfer ability from the mesoporous structure and large amounts of acid sites within Beta zeolite.

高荔(1978-),女,博士研究生,研究方向为工业催化,gaoli116_1229@163.com