Journal of South China University of Technology (Natural Science Edition) ›› 2008, Vol. 36 ›› Issue (7): 26-31.

• Chemistry & Chemical Engineering • Previous Articles     Next Articles

Synthesis and Property Characterization of K-Doped Li2 ZrO3 for CO2 Adsorption

Yuan Wen-hui1  Wang Chan-yue1  Yan Hui-jing1  Li Li2   

  1. 1. School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640, Guangdong, China; 2. School of Environmental Science and Engineering, South China University of Technology, Guangzhou 510640, Guangdong, China
  • Received:2007-09-24 Revised:2007-12-20 Online:2008-07-25 Published:2008-07-25
  • Contact: 袁文辉（1969-），男，博士，副教授，主要从事化工吸附分离和膜催化分离研究． E-mail:cewhyuan@scut．edu．cn
  • About author:袁文辉（1969-），男，博士，副教授，主要从事化工吸附分离和膜催化分离研究．
  • Supported by:

    广东省自然科学基金资助项目（06025657）

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Abstract:

Super-fine K-doped Li2ZrO3 powders were synthesized via the citric acid-ethylene glycol complexing, with the nitrates of lithium, zirconyl and potassium as the materials. Then, the precursor of K-doped Li2ZrO3and the K-doped Li2ZrO3 powders were characterized by means of TG-DSC, XRD and SEM. Moreover, the thermal decomposition of the gel and the formation of the tetragonal crystalline form were analyzed. The results indicate that the crystal phase of super-fine K-doped Li2ZrO3powders calcined at 800 ℃ for 150min is tetragonal, holonomic and homogeneous, that the increase of calcination temperature promotes the grain growth and the densification. TG-DSC results in CO2 atmosphere at programmed temperature and constant high temperature show that, at the optimum adsorption temperature, 500℃ , the adsorption capacity of K-doped Li2ZrO3 powders for CO2 is up to 29.5% after 90 min, with a CO2 flux of 15 cm3/min.

Key words: K-doped Li2ZrO3, itric acid-ethylene glycol complexing, dsorption rate