添加Tm对VPO催化剂性能的影响  

Influence of Thulium Doped VPO Catalyst on Characterization of Catalyst

作　　者：李铭岫[1] 宋天乐[1] 杨述韬[1] 王心葵[2] 张志新[2] 周敬来[2] 

机构地区：[1]河北师范学院化学系,石家庄050091 [2]中国科学院山西煤炭化学研究所,太原030001

出　　处：《物理化学学报》1995年第8期734-737,共4页Acta Physico-Chimica Sinica

基　　金：河北省自然科学基金;北京中关村地区测试中心资助

摘　　要：Phase composition, surface characterization and catalytic performance of VPO and thulium doped VPO catalysts were investigated by means of NH3-TPD, XPS,XRD and IR. Experimental results showed that when Tm/V (atomic ratio) ＜0.10, both Bronsted and Lewis acidities on the surface of VPO catalysts with the addition of thulium were stronger than those of VPO catalyst, the doped catalyst accelerated the dehydrogena tion step of the oxidation reaction of n-butane. Conversion of n-butane and selectivity to maleic anhydride were enhanced. While Tm/V■0.10, the surface acidity of the catalysts was decreased and the activity of catalysts was dropped.Phase composition, surface characterization and catalytic performance of VPO and thulium doped VPO catalysts were investigated by means of NH3-TPD, XPS,XRD and IR. Experimental results showed that when Tm/V (atomic ratio) ＜0.10, both Bronsted and Lewis acidities on the surface of VPO catalysts with the addition of thulium were stronger than those of VPO catalyst, the doped catalyst accelerated the dehydrogena tion step of the oxidation reaction of n-butane. Conversion of n-butane and selectivity to maleic anhydride were enhanced. While Tm/V■0.10, the surface acidity of the catalysts was decreased and the activity of catalysts was dropped.

关 键 词：铥 VPO催化剂 顺酐 正丁烷 

分 类 号：O643.36[理学—物理化学] O623.614[理学—化学]