Performance of iron-incorporated A-type zeolites for O2/N2 separation from air by pressure swing adsorption
✍ Scribed by T. Inui; M. Shibata; W. Tanakulrungsank; T. Takeguchi
- Publisher
- Elsevier Science
- Year
- 1992
- Tongue
- English
- Weight
- 580 KB
- Volume
- 6
- Category
- Article
- ISSN
- 0950-4214
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✦ Synopsis
The performance of various metal ion-exchanged A-type zeolites and metal-incorporated A-type zeolites for Oz and Nz adsorption was studied to provide a pressure swing adsorption (PSA) process. Metal-incorporated A-type zeolites adsorbed N2 in larger quantities than metal ion-exchanged A-type zeolites. Compared with Na-A zeolite, both Cu-incorporated and Ni-incorporated A-type zeolites adsorbed larger quantities of Nz. The incorporation of Cu or Ni enlarged the pore size of the zeolite, while Fe incorporation reduced it. However, the adsorption volume ratio of Oz to N, could be increased to as high as 4.2 on Fe-incorporated A-type zeolite calcined at 750X, which was the highest value among the samples tested. The amount of adsorption of O2 was 38.0 ml g-', which was comparable with ordinary Na-A zeolite. The Fe incorporation markedly improved the performance of ordinary Na-A zeolite in O./N2 separation. Therefore, Fe-incorporated A-type zeolite has a high potential as a good adsorbent for pressure swing adsorption in Oz/Nz separation from air.