| 초록 |
A three-bed PVSA process was developed to overcome the 94% O2 purity restriction inherent to air separation in the adsorption process. To develop the PVSA process, two-bed VSA process for air separation and two-bed PSA process for oxygen purification were designed at first. From the VSA and the PSA processes, higher than 90% O2 from air and 99.8+% O2 from oxygen enriched feeds (higher than 90% oxygen) could be produced, respectively. Then, two different cycles of the PVSA process combined and equilibrium separation with a kinetic separation were designed. To produce 97_% and/or 99_% purity O2 directly from air, the PVSA process with two zeolite 10X beds and one CMS bed was executed at 33.44 – 45.60 to 253.31 kPa. In addition, the effluent gas from the CMS bed to be used for O2 purification was backfilled to the zeolite 10X bed to improve its purity, recovery, and productivity in bulk separation of the air. |
