Abstract
AlPO 4-14 molecular sieve was prepared by hydrothermal crystallization of saturated gels. The synthesized molecular sieve was characterized by X-ray diffraction and scanning electron microscopy. For the first time, the adsorption behavior of CO 2 and CH 4 was investigated on AlPO 4-14, a neutral molecular sieve with no extra-framework cations. Adsorption isotherms of CO 2 and CH 4 on AlPO 4-14 were examined at 273 and 300 K. Henry's law constants and isosteric heats of adsorption of all adsorbates were determined from adsorption isotherms. It was found that CO 2 was strongly adsorbed on the molecular sieve, and the selectivity of CO 2/CH 4 can reach as high as 21.77 at 273 K. The adsorbate-adsorbent interaction and the steric effect should be responsible for the preferential adsorption of CO 2 on AlPO 4-14.
| Original language | English |
|---|---|
| Pages (from-to) | 1534-1538 |
| Number of pages | 5 |
| Journal | Energy and Fuels |
| Volume | 23 |
| Issue number | 3 |
| DOIs | |
| State | Published - 19 Mar 2009 |