工业应用γ-Al_2O_3载体表面酸性与微观结构的关系  

RELATIONSHIP BETWEEN SURFACE ACIDITY AND MICROSTRUCTURE OF INDUSTRIALγ-ALUMINA

作　　者：季洪海[1] 凌凤香[1] 王少军[1] 沈智奇[1] 

机构地区：[1]中国石化抚顺石油化工研究院,辽宁抚顺113001

出　　处：《石油炼制与化工》2015年第10期17-21,共5页Petroleum Processing and Petrochemicals

基　　金：中国石油化工股份有限公司合同项目(113027)

摘　　要：以3种工业应用γ-Al2O3载体为研究对象,应用XRD、NMR、TEM、吡啶吸附-脱附等技术分析其表面性质与微观结构,并探索γ-Al2O3载体表面酸性与微观结构的关系。结果表明:3种γ-Al2O3晶粒表面分别为(110),(100),(111)晶面;氧化铝-1(110),(100),(111)晶面所占比例分别为68%,6%,26%;氧化铝-2(110),(100),(111)晶面所占比例分别为63%,19%,18%;氧化铝-3(110),(100),(111)晶面所占比例分别为59%,19%,22%;γ-Al2O3表面晶面比例的不同导致其具有不同的表面酸性,氧化铝-1(110)晶面含量较高,其强酸和中强酸含量相对较高;氧化铝-2、氧化铝-3(100)晶面含量较高,其弱酸含量相对较高。The relationship between the surface acidity and microstructure ofγ-alumina support were studied on three industrial alumina samples based on the characterizations by XRD,NMR,TEM and pyridine-FTIR.The results show that there are three crystal planes on the surface of alumina：（110）,（100）and（111）planes,and the ratio of the three main planes were different on the alumina supports.The ratios of crystal planes（110）,（100）,（111）on sample alumina-1,alumina-2and alumina-3are68%,19%,26%,and 63%,19%,18%,and 59%,19%,22%,respectively.The sample alumina-1with higher ratio of（110）plane possesses more medium-strong and strong acidic sites;while the samples alumina-2and alumina-3with higher ratio of（100）plane possess more weak acidic sites.

关 键 词：氧化铝 酸性质 微观结构 晶面 

分 类 号：TQ426.65[化学工程] TQ133.1