纳米丝负载钯催化剂的制备及催化烯烃加氢性能研究

利用电纺丝技术制备出苯乙烯-丙烯腈共聚物负载钯的纳米丝催化剂.对催化剂进行了SEM、TEM、IR和XPS的测试.所制备的催化剂对α-己烯催化氢化结果表明,该催化剂在常温、氢气常压下具有很高的催化活性和较好的重复使用性,并且催化氢化过程中存在烯烃的异构化反应.实验结果表明,反应时间为150min时纳米催化剂A对α-己烯催化加氢生成正己烷的转化率是传统催化剂PdCl2/-γAl2O3的4.7倍.

PREPARATION OF NANO_FIBER SUPPORTED PALLADIUM CATALYSTS AND THEIR USE FOR THE CATALYTIC HYDROGENATION OF OLEFINS

The poly(styrene-co-acrylonitrile) supported palladium catalyst bearing a nano-fibrous morphology was prepared via electrospinning technique,and the catalyst was characterized by IR,SEM,TEM and XPS.The nano-fiber supported catalyst has high activity and good recycling property for hydrogenation of α-olefin at room temperature under 101.3 Pa.hydrogen pressure.In addition,it was found that the hydrogenation reaction of α-hexene was accompanied with the isomerization reaction.The experimental results show that the yield of the α-hexene to hexane catalyzed by the nano-fiber supported palladium catalyst was 4.7 times higher than that of PdCl_2/γ-Al_2O_3 catalyst.The hydrogenation of α-tetradecylene,cyclohexene,nitrobenzol and styrene by the nano-fiber supported palladium catalyst was also studied,the selectivity to primary products of the hydrogenation of cyclohexene,nitrobenzol and styrene was 100%.