Abstract
This study focused on the development of effective adsorbent to remove acetylenes for the purification of isoprene. The adsorbents with various pore sizes from 4 Å to 5 Å were prepared to investigate the effect of pore size on selective adsorption of acetylene as an impurity. The pore size of zeolite A was adjusted by ion-exchange between Na and Ca ions. The pore size of adsorbents has affected the removal of acetylenes selectively because of the kinetic diameter of acetylenes, such as 2-methyl-1-butyne-3-yen (IPA) and 2-butyne. In a batch adsorption experiment, 5A zeolite with pore size of 5 Å showed the highest removal capacity of 2-butyne. However, IPA was hardly removed from isoprene by the A-type zeolites. For the adsorption isotherm, modified Langmuir model was well fitted with 2-butyne adsorption. Moreover, the regeneration of adsorbent was carried out to determine optimum method. The adsorbent heated for 12 h at 300 °C was regenerated significantly.
| Original language | English |
|---|---|
| Pages (from-to) | 548-552 |
| Number of pages | 5 |
| Journal | Applied Chemistry for Engineering |
| Volume | 21 |
| Issue number | 5 |
| State | Published - Oct 2010 |
Keywords
- A zeolite
- Acetylenes
- Adsorption
- Isoprene