首页 | 本学科首页   官方微博 | 高级检索  
     检索      

异丁烷部分氧化V-P-O/SiO2催化剂的研究
作者单位:天津大学化工学院,天津,300072;天津大学化工学院,天津,300072;天津大学化工学院,天津,300072
基金项目:国家自然科学基金;国家重点基础研究发展计划(973计划)
摘    要:

关 键 词:异丁烷  部分氧化  负载型V-P-O催化剂  溶胶-凝胶技术

Study on the V-P-O/SiO2 Catalyst in the Partial Oxidation of Iso-butane
Authors:Zhong Shunhe  Wang Xitao  Geng Yunfeng
Institution:{{each article.affiliations aff i}} {{if aff.addressEn && aff.addressEn != ""}} {{if aff.label && aff.label != "" && article.affiliations.length != 1}}{{@ aff.label}}.{{/if}}{{@ aff.addressEn}}{{/if}} {{/each}}
Abstract:The V2O5/SiO2 and V2O5-P2O5/SiO2 catalysts were prepared by the Sol-gel method. The surface composition,structure,chemisorption and reactivity of the catalysts were systematically studied by using the techniques of XRD,TPR,IR,TPD and icro-reactor. The results showed that the active component was dispersed uniformly on the surface of amorphous SiO2 . There existed Lewis base sites(V=O and V-O-V)and Lewis acid sites (Vn+)on the surface of these catalysts. An addition of PO43- could lower the activity of surface terminal oxygen of Lewis base sites V=O. Iso-butane could chemisorbed on surface terminal oxygen of Lewis base sites V=O by one or two H atoms in -CH3 to form molecular adsorption states. Reaction products of i-C4H10 on the V-P-O/SiO2 catalyst were mainly i-C4H8,MAL,MAA and COx . Conversion of i-C4H10 was 5% and selectivity of partial oxidation products is above 72% at 300℃. The addition of PO43- could improve the selectivity of partial oxidation products on the VSiO catalyst because PO43- could reduce the activity of lattice oxygen in V = O bond,and weaken the adsorption intensity of i-C4H10 .
Keywords:Iso-butane,Partial oxidation,Supported V-P-O catalyst,Sol-gel        
本文献已被 万方数据 等数据库收录!
点击此处可从《化学物理学报(中文版)》浏览原始摘要信息
点击此处可从《化学物理学报(中文版)》下载免费的PDF全文
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号