Adsorption and desorption of carbon dioxide onto and from activated carbon at high pressures

被引:148
作者
Chen, JH
Wong, DSH
Tan, CS
Subramanian, R
Lira, CT
Orth, M
机构
[1] NATL TSING HUA UNIV, DEPT CHEM ENGN, HSINCHU 30043, TAIWAN
[2] MICHIGAN STATE UNIV, DEPT CHEM ENGN, E LANSING, MI 48824 USA
关键词
D O I
10.1021/ie960227w
中图分类号
TQ [化学工业];
学科分类号
0817 ;
摘要
Adsorption of carbon dioxide near its critical point on DeGussa IV activated carbon is investigated in this study. A volumetric method was used to measure the adsorption/desorption isotherms at 284, 300, 305, 310, and 314 K over a large pressure range. At subcritical temperatures, adsorption isotherms display a discontinuity at the vapor pressure of carbon dioxide, and desorption hysteresis is observed. However, there is no desorption hysteresis if adsorption is terminated before vapor-liquid transition occurs. At supercritical temperatures, adsorption isotherms display a plateau, and the excess decreases beyond the critical pressure. No hysteresis occurs during the desorption process. The adsorption isotherms can be represented very well by the simplified local density model.
引用
收藏
页码:2808 / 2815
页数:8
相关论文
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