高等学校化学学报 ›› 2001, Vol. 22 ›› Issue (10): 1741.

• 研究简报 • 上一篇    下一篇

K2CO3/γ-Al2O3对SO2吸附性能的研究

江德恩, 赵璧英, 谢有畅   

  1. 北京大学物理化学研究所, 北京 100871
  • 收稿日期:2000-09-07 出版日期:2001-10-24 发布日期:2001-10-24
  • 通讯作者: 赵璧英(1939年出生),女,教授,主要从事表面结构、催化与吸附研究.E-mail:zby@pku.edu.cn E-mail:zby@pku.edu.cn
  • 基金资助:

    国家科学技术委员会基础性研究重大项目;国家自然科学基金(批准号:29733080)资助

Studies on the Adsorption Performance of K2CO3/γ-Al2O3 to SO2

JIANG De-En, ZHAO Bi-Ying, XIE You-Chang   

  1. Institute of Physical Chemistry, Peking University, Beijing 100871, China
  • Received:2000-09-07 Online:2001-10-24 Published:2001-10-24

关键词: SO2, 吸附, K2CO3/&gamma, -Al2O3, 再生, 单层分散

Abstract: The dispersion of K2CO3 on γ-Al2O3 and the adsorption performance of K2CO3/γ-Al2O3 to SO2 are investigated.The results show that K2CO3 can disperse onto the surface of γ-Al2O3 as a monolayer and the dispersion threshold is 0.31[m(K2CO3)/m(γ-Al2O3), m/g], which is close to the theoretical value calculated by assuming a bidentate vertical dispersion model of CO2 on the γ-Al2O3 surface. The SO2 adsorption-capacity on K2CO3/γ-Al2O3 sample increases with the K2CO3 loading and reaches an extremum at its threshold. The adsorbent conversion of K2CO3/γ-Al2O3 at the threshold is up to 72%. When the loading is higher than the threshold, the SO2 adsorption capacity decreases at first, then increases again. This phenomenon is caused by the reaction between SO2 and the bulk phase of K2CO3 crystallites. The sample decreases with the loading, and the sample with 0.10[m(K2CO3)/m(γ-Al2O3), m/g] loading shows the highest regeneration percentage of 63%. Compared with Na2CO3/γ-Al2O3, K2CO3/γ-Al2O3 might have some advantages.

Key words: SO2, Adsorption, K2CO3/γ-Al2O3, Regeneration, Monolayer dispersion

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