分析测试学报2011，Vol.30Issue(8)：883-886,4.DOI:10.3969/j.issn.1004-4957.2011.08.010
加氢精制催化剂表面纳米棒束的电子显微镜研究
Study of the Nanorod Arrays on Hydrorefining Catalyst Surface by Electron Microscopy
李娜 1马波 2杨卫亚 1凌凤香 2王丽华 2翁蕾 2沈智奇1
作者信息
- 1. 辽宁石油化工大学化学与材料科学学院,辽宁抚顺113001
- 2. 中国石油化工股份有限公司抚顺石油化工研究院,辽宁抚顺113001
- 折叠
摘要
Abstract
The morphologies, chemical composition and crystal structure of the nanorod arrays on the sulfurated hydrorefining catalyst surface were studied by scanning electron microscopy ( SEM ) , high resolution transmission electron microscopy ( HRTEM) , selected area electron diffraction (SAED) and X-ray energy disperse spectroscopy(EDS). The nanorod arrays were observed by SEM, which widely distributed on the catalyst surface. The nanorod arrays grew outward from the surface and assumed their regular shapes with lengths of 500 - 1 500 nm and diameter of 200 - 500 nm. According to the result of HRTEM, the nanorod arrays consisted of nanorods possessing single crystal structure with diameters of 40 - 100 nm. The image of crystal lattice fringe was also observed by HRTEM. The results of TEM - EDS showed that the nanorod arrays were composed of Ca, S and 0. By means of the double-tilt method, SAED patterns with different orientations were obtained. According to the chemical composition of the nanorod arrays shown by EDS and the crystallology information from the diffraction patterns of SAED patterns, the nanorods were confirmed to be of hexagonal calcium sulphate. The formation of calcium sulphate resulted from Ca originated from quartz sands which were mixed with catalysts in the fixed bed. Therefore, in order to prevent the generation of calcium sulphate, the quartz sands should be properly pretreated by calcining at high tempreture, acid cleaning and alkali cleaning, to eliminate the influence of calcium sulphate on catalytic activity in hydro-refining process.关键词
加氢精制催化剂/纳米棒束/硫酸钙/扫描电镜/高分辨透射电镜Key words
hydrorefining catalyst/ nanorod arrays/ calcium sulphate/ SEM/ HRTEM分类
数理科学引用本文复制引用
李娜,马波,杨卫亚,凌凤香,王丽华,翁蕾,沈智奇..加氢精制催化剂表面纳米棒束的电子显微镜研究[J].分析测试学报,2011,30(8):883-886,4.
