In the petrochemical field,powder X-ray diffraction is one of the most effective and widely used analytical method for the crystal structure of catalytic materials.The paper briefly introduces the history and basic principles of X-ray diffraction technology,reviews the application of basic powder X-ray diffraction methods in the research of catalysts in petroleum refining and chemical engineering during recent years,mainly including the determination of the composition of catalytic materials through qualitative/quantitative phase analysis,the current standards of relative crystallinity and their applications on structural changes of zeolites in hydrothermal environments,the current standards of unit cell parameters and their identifications on catalytic active centers,as well as grain size determination methods and their impacts on reaction diffusion,and also clarifies the precautions and scope of the application when using these methods.Furthermore,the main research progresses in powder X-ray diffraction from the SINOPEC Research Institute of Petroleum Processing Co.,Ltd.are elucidated.Finally,future prospects for the development of X-ray diffraction technology in terms of technology upgrading,machine learning,in-situ characterization and combined technology are prospected.
关键词
多晶X射线衍射/炼油与化工催化剂/定性相分析/定量相分析/相对结晶度/晶胞参数/晶粒大小
Key words
powder X-ray diffraction/petroleum refining and chemical catalyst/qualitative phase analysis/quantitative phase analysis/relative crystallinity/unit cell parameter/grain size
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