文献类型：期刊文献

中文题名：Zr(OH)_4的晶化对Pt/WO_3-ZrO_2异构化反应性能的影响

英文题名：EFFECTS OF CRYSTALLIZATION OF ZIRCONIUM HYDROXIDE ON THE ISOMERIZATION PERFORMANCES OF Pt/WO_3-ZrO_2

作者：康承琳[1];宋月芹[1];刘锋[1];周晓龙[1];李承烈[1]

机构：[1]华东理工大学石油加工研究所,上海200237

年份：2009

卷号：25

期号：5

起止页码：661

中文期刊名：石油学报（石油加工）

外文期刊名：Acta Petrolei Sinica(Petroleum Processing Section)

收录：CSTPCD;;EI(收录号：20094912531086);Scopus;北大核心:【北大核心2008】；CSCD:【CSCD_E2011_2012】；

基金：国家重大基础研究"973"项目(2004CB720603)资助

语种：中文

中文关键词：水合氧化锆;晶化;铂;WO3-ZrO2;异构化;正己烷

外文关键词：hydrous zirconia; crystallization; Pt; WO3-ZrO2 ; isomerization; n-hexane

摘要：采用浸渍法制备了Pt/WO3-ZrO2催化剂,考察了Zr(OH)4的晶化对Pt/WO3-ZrO2催化剂上正己烷异构化性能的影响。结果表明,Zr(OH)4母体的晶化对Pt/WO3-ZrO2的酸性和正己烷异构化性能的影响依赖于负载W后样品的焙烧温度。Zr(OH)4的晶化导致了Zrθ1-W700(θ1为Zr(OH)4母体在空气中的晶化温度,700为负载W后的焙烧温度)上酸中心和Pt/Zrθ1-W700的异构化活性的明显下降,而Zrθ1-W800上的酸中心和Pt/Zrθ1-W800的异构化活性无明显变化。正己烷异构化活性不但与WO3-ZrO2上的酸性有关,且与其中大量四方相ZrO2的存在密切相关。
Pt/WO3-ZrO2 catalysts were prepared by impregnating method. The effect of Zr （OH）4 crystallization on the isomerization performance of Pt/WO3-ZrO2 was investigated. The results showed that the effects of the crystallization of Zr（OH）4 on the acidity of WO3-ZrO2 and the isomerization activity of Pt/WO3-ZrO2 were dependent on the calcination temperature of Zr（OH）4 loaded with W. The crystallization of Zr（OH）, led to a significant decrease in the acid sites on Zrθ1-W700 and the isomerization activity of Pt/Zrθ1-W700 （θ1 and 700 represented the crystallization temperature of Zr（OH）4 and calcinations temperature, respectively）. However, the crystallization of Zr（OH）4 could not cause the great change in the acid sites on Zrθ1-W800 and the isomerization activity of Pt/Zrθ1-W800. The isomerization activity of the catalyst Pt/WO3 ZrO2 was related not only to the acidity of WO3-ZrO2, but also to the amount of tetragonal zirconia in Pt/WO3-ZrO2.