Acta Chimica Sinica ›› 2003, Vol. 61 ›› Issue (3): 450-453. Previous Articles    

Original Articles

辽河减压渣油中非卟啉镍的XAFS研究

徐海;阙国和;王继乾;于道永;张静;谢亚宁;胡天斗   

  1. 石油大学化学化工学院;中国科学院高能物理研究所同步辐射室
  • 发布日期:2003-03-15

Structural Characterization by XAFS Spectroscopy of Non-Porphyrin Nickel in Liaohe Vacuum Residue

Xu Hai;Que Guohe;Wang Jiqian;Yu Daoyong;Zhang Jing;Xie Yaning;Hu Tiandou   

  1. College of Chemistry and Chemical Engineering,University of Petroleum;Synchrotron Radiation Laboratory,Institute of High Energy Physics,Chinese Academy of Sciences
  • Published:2003-03-15

The local chemical structure of non-porphyrin Ni in Liaohe vacuum residue was investigated by X-ray absorption fine structure (XAFS) spectroscopy. Although the concentration of non-porphyrin Ni in the sample is very low, an available XAFS data was obtained by fluorescence mode. The X-ray absorption near edge structure (XANES) spectrum of the non-porphyrin Ni is similar to that in Ni ( II ) tetraphenylporphyrin, indicating the same Ni local structure. The extended X-ray absorption fine structure (EXAFS) result shows that the first coordination shells of Ni in the two samples are nearly identical, that is, non-porphyrin Ni also exists in a square-planar coordination of four N and the Ni-N distance is 0.192 run.

Key words: PORPHYRIN, NICKEL COMPOUNDS, RESIDUAL OIL

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