X-射线衍射测定催化剂及其载体中γ-氧化铝相含量  

Determination of contents for gamma alumina phase in catalysts and its supports by X-ray diffraction

作　　者：杜亚雄 郑鑫 Du Yaxiong;Zheng Xin(LANScientific Co.,Ltd.,Suzhou 215151,China)

机构地区：[1]苏州浪声科学仪器有限公司,江苏苏州215151

出　　处：《炼油与化工》2024年第5期55-57,共3页Refining And Chemical Industry

摘　　要：采用X-射线衍射和SH/T 0625(石油化工行业标准,硅铝催化剂中γ-氧化铝含量测定法X射线衍射法)对6种典型催化剂及其载体中γ-氧化铝相的相对含量(又称相对结晶度)进行测定试验,发现SH/T 0625中步进扫描实验条件有问题,为此在SH/T 0625标准制定工作的基础上,提出改进试验方法,主要是选择步进扫描试验条件。改进方法仍采用外标法测定γ-氧化铝相的相对含量,测定范围35.9%~114.0%,标准偏差(SD)0.7%~1.9%,相对标准偏差(RSD)1.2%~1.8%;测定参比样γ-氧化铝相的相对含量(标称值114.0%)绝对偏差-2.3%~+1.6%(n=10),能够满足相关催化剂及其载体中γ-氧化铝相的相对含量测定的所有工艺技术要求,改进的方法可在石化生产行业推广应用。The relative content(also known as relative crystallinity)ofγ-alumina phase in 6 typical catalysts and their supports was measured by X-ray diffraction and SH/T 0625(standard for the petrochemical industry,determination method for gamma alumina content in catalysts containing silica and alumina by X-ray diffraction).It was found that the experimental conditions of step scanning in SH/T 0625 were problematic.Therefore,an improved test method was proposed based on the formulation of SH/T 0625 standard.It mainly includes the selection of step scanning test conditions.The relative content ofγ-alumina phase was determined by external standard method.The range of determination was 35.9%~114.0%,the standard deviation(SD)was 0.7%~1.9%,and the relative standard deviation(RSD)was 1.2%~1.8%.The relative content ofγ-alumina phase(nominal value 114.0%)of the reference sample was determined with an absolute deviation of-2.3%~+1.6%(n=10),which can meet all the technical requirements of the relative content determination ofγ-alumina phase in the relevant catalyst and its support.

关 键 词：相对含量 相对结晶度 γ-氧化铝相 载体 催化剂 相定性 相定量 X-射线衍射 

分 类 号：TH744.15[机械工程—光学工程]