Adsorption and desorption of carbon dioxide onto and from activated carbon at high pressures
- National Tsing Hua Univ., Hsinchu (Taiwan, Province of China). Dept. of Chemical Engineering
- Michigan State Univ., East Lansing, MI (United States). Dept. of Chemical Engineering
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.
- OSTI ID:
- 529754
- Journal Information:
- Industrial and Engineering Chemistry Research, Vol. 36, Issue 7; Other Information: PBD: Jul 1997
- Country of Publication:
- United States
- Language:
- English
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