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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
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- DOI:
- 作者:
- 杜亚雄，郑鑫
Du Yaxiong，Zheng Xin
- 作者单位:
- 苏州浪声科学仪器有限公司，江苏苏州215151
LANScientific Co., Ltd., Suzhou 215151, China
- 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
Relative Content; Relative Crystallinity; Gamma Alumina Phase; Support; Catalyst; Phase Identification; Phase Quantification; X-ray diffraction
- 摘要:
- 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。
Abstract: The relative content (also known as relative crystallinity) of γ-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 of γ-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 of γ - 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 of γ-alumina phase in the relevant catalyst and its support.