Co_(3)O_(4)/HY选择性催化苯甲醇氧化合成苯甲醛的研究  

Selective oxidation of benzyl alcohol to benzaldehyde over Co_(3)O_(4)/HY catalyst

作　　者：王园园[1] 董省身 宋华[1] 张梅[1] 孙兴龙 王雪芹[1] 王文艺[1] 朱天汉 WANG Yuan-yuan;DONG Xing-shen;SONG Hua;ZHANG Mei;SUN Xing-long;WANG Xue-qin;WANG Wen-yi;ZHU Tian-han(College of Chemistry and Chemical Engineering,Northeast Petroleum University,Daqing 163318,China;Daqing Petrochemical Engineering Co.,Ltd.,Daqing 163714,China)

机构地区：[1]东北石油大学化学化工学院,黑龙江大庆163318 [2]大庆石化工程有限公司,黑龙江大庆163714

出　　处：《现代化工》2022年第7期114-119,共6页Modern Chemical Industry

基　　金：黑龙江省杰出青年基金项目(JC2018002);黑龙江省青年基金项目(QC2017005);东北石油大学青年基金项目(2018QNL-26);东北石油大学人才引进科研启动费资助项目(1305021821)。

摘　　要：以HY分子筛为载体,采用水热法合成了系列Co_(3)O_(4)/HY复合分子筛催化剂,通过XRD、SEM、EDS、FT-IR、BET等手段对Co_(3)O_(4)/HY进行表征,并对Co_(3)O_(4)/HY分子筛催化氧气液相氧化苯甲醇合成苯甲醛的性能进行研究。结果表明,Co_(3)O_(4)的引入未破坏分子筛的骨架结构,且Co_(3)O_(4)在HY晶体表面形成片层蜂窝状多孔结构,可有效增加催化剂样品的介孔孔容和外表面积,增加催化活性。但Co_(3)O_(4)负载过量易出现堆叠现象,使得介孔孔容和外表面积降低,不利于氧化反应进行。以1.0-Co_(3)O_(4)/HY为催化剂,在适宜的反应条件下苯甲醇的转化率和苯甲醛的选择性分别达到73.2%和95.8%;催化剂重复使用5次,依然表现出较好的催化活性。Co_(3)O_(4)/HY composite molecular sieve catalysts are synthesized by a hydrothermal method with HY molecular sieve as carrier.The prepared catalysts are characterized by means of XRD,SEM,EDS,FT-IR,and BET.Moreover, the catalytic properties of Co_(3)O_(4)/HY for the oxidation of benzyl alcohol to benzaldehyde using oxygen as an oxidant are investigated.The result shows that the loading of Co_(3)O_(4)on HY molecular sieve has not destroyed the framework structure of HY,and Co_(3)O_(4)forms a porous cellular structure on the surface of HY,which can effectively help the catalyst to increase the mesopores volume and the external surface area, therefore enhancing the catalytic activity.While the decreases of mesopores volume and external surface area are observed for 2.0-Co_(3)O_(4)/HY,which can be explained by stacked phenomenon due to the high loading of Co_(3)O_(4).The conversion of benzyl alcohol reaches 73.2% and the selectivity of benzaldehyde reaches 95.8% when the reaction has been performed over 1.0 m-Co_(3)O_(4)/HY catalyst under suitable reaction conditions.The catalyst has still shown a good catalytic activity after it has been reused for 5 runs.

关 键 词：HY分子筛 Co_(3)O_(4) 催化氧化 苯甲醇 苯甲醛 

分 类 号：TQ244[化学工程—有机化工]