新型Pd/HZSM-5-N催化剂的制备及其在苯甲醇氧化反应中的应用  

Preparation of Novel Pd/HZSM-5-N Catalysts and Their Applications in Benzyl Alcohol Oxidation

作　　者：王玉宝[1] 陈玉静[1] 

机构地区：[1]鲁东大学化学与材料科学学院,山东烟台264025

出　　处：《合成化学》2016年第5期409-413,共5页Chinese Journal of Synthetic Chemistry

摘　　要：以分子筛HZSM-5为前驱体,氨气为氮源,直接高温氮化制得掺氮分子筛HZSM-5-N(1);以Pd(OAc)_2为钯源,1为载体,采用溶胶-固载法制备了一系列不同钯负载量(α)的新型Pd~α/1催化剂,其结构和性质经SEM,FT-IR,元素分析,XRD,N_2-BET和ICP表征。以苯甲醇氧化成苯甲醛反应为探针反应,研究了α,Pd~α/1用量,反应时间和反应温度对Pd~α/1催化性能的影响。结果表明:在最优反应条件(Pd^2/1 40 mg,于120℃反应180min)下,苯甲醇转化率为66.7%,苯甲醛选择性为92.9%。Pd^2/1重复使用性能较好,循环使用5次,催化活性保持不变。The doped nitrogen molecular sieve,HZSM-5-N（ 1）,was obtained by directly high temperature nitridation,using molecular sieve HZSM-5 as precursor and ammonia as nitrogen source. A series of catalysts（ Pd~α/1） with different Pa loading（ α） were prepared by sol-immobilization method,using 1as supporter and Pd（ OAc）_2as Pd source. The structures and properties of Pd~α/1 were characterized by SEM,FT-IR,elemental analysis,XRD,N_2-BET and ICP. Effects of α,Pd~α/1 dosage,reaction time and temperature on catalytic performances of Pd~α/1 were investgated,using benzyl alcohol oxidation as the template reaction. The results showed that conversion of benzyl alcohol was 66. 7% and selectivity of benzaldehyde was 92. 9% under the optimum reaction conditions（ Pd^2/1 40 mg,reacted at120 ℃ for 180 min）. The catalytic performance of Pd^2/1 remain stable after recycling for five times.

关 键 词：掺氮分子筛 钯催化剂 苯甲醇氧化反应 制备 催化性能 

分 类 号：O614.82[理学—无机化学] TQ426.81[理学—化学]