Abstract
For the purpose of separating high purity hydrogen gas from COG, dynamic adsorption characteristic of COG on synthetic zeolites were studied by using 2 tower PSA apparatus (adsorption pressure 5kg/cm2G), and the following results were obtained.
1. High purity (99. 99 Vol% above) hydrogen were separated from COG, and the most effective synthetic zeolite for adsorber was 5Å zeolite.
2. Oxygen leaked first in the product hydrogen. and N2, CH4 follows. CO2 and C2 H4 are adsorbed easily in 5Å zeolite, but their desorption is difficult.
3. During the adsorption time before another gas leaking, the relation between the purity and the yield of H2 in the product gas gave an inverse proportion.
4. For industrial H2 separation from COG, by combining other adsorbent (activated carbon etc.) which having much effective adsorbability of CO2 and C2H4 with 5Å zeolite, H2 will be separated more effectively. And by removing a small amount of O2 in the product H2 by catalysis, extra purity H2 is obtained more effectively.
