Pressure-swing adsorption using layered adsorbent beds with different adsorption properties:: I -: Results of process simulation

被引:8
作者
Lü, YP
Doong, SJ
Bülow, M
机构
[1] BOC Proc Gas Solut Technol, Murray Hill, NJ 07974 USA
[2] Inst Gas Technol, Des Plaines, IL 60018 USA
来源
ADSORPTION-JOURNAL OF THE INTERNATIONAL ADSORPTION SOCIETY | 2003年 / 9卷 / 04期
关键词
Layered beds; Performance simulation; Positioning of adsorbents; Variation in capacity and selectivity; VSA/PSA processes;
D O I
10.1023/A:1026228015051
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
A simulation study was conducted on layered-bed pressure-swing adsorption, PSA, processes with adsorbents that differ in their adsorption properties. As an example, an oxygen, O-2, vacuum-swing adsorption, VSA, process was analyzed to investigate relationships between process performance and adsorption properties of the adsorbents used. For two adsorbents with identical nitrogen-to-oxygen, N-2/O-2, selectivity but different N-2 and O-2 capacities, placing the high-capacity adsorbent at the product end and the low-capacity adsorbent at the feed end of the adsorption bed gives a better performance than the case of reversing layering of these adsorbents. However, for two adsorbents with different values of N-2/O-2 selectivity but identical N-2 capacity, changing the bed-layer configuration does not show a significant difference in O-2-VSA performance. The advantages of layering a high-capacity adsorbent on product end of the bed are demonstrated by an examination of the N-2-loading difference in a VSA cycle. The modeling study also reveals an effect of cycle features (e.g., equalization step) on the effectiveness of using layered-bed configurations in VSA/PSA processes. It suggests that layering appropriately two adsorbents with different adsorption properties could result in better VSA/PSA-process performance than using a single-layer bed with either of the two adsorbents.
引用
收藏
页码:337 / 347
页数:11
相关论文
共 8 条
  • [1] Effect of operation symmetry on pressure swing adsorption process
    Doong, SJ
    Propsner, P
    [J]. ADSORPTION-JOURNAL OF THE INTERNATIONAL ADSORPTION SOCIETY, 1998, 4 (02): : 149 - 158
  • [2] FRAY DD, 1982, SEPN SCI TECHN, V17, P1485
  • [3] NOTARO F, 1998, Patent No. 5674311
  • [4] Adsorber dynamics and optimal design of layered beds for multicomponent gas adsorption
    Park, JH
    Kim, JN
    Cho, SH
    Kim, JD
    Yang, RT
    [J]. CHEMICAL ENGINEERING SCIENCE, 1998, 53 (23) : 3951 - 3963
  • [5] Performance analysis of four-bad H2PSA process using layered beds
    Park, JH
    Kim, JN
    Cho, SH
    [J]. AICHE JOURNAL, 2000, 46 (04) : 790 - 802
  • [6] Equilibrium theory for pressure swing adsorption .2. Purification and enrichment in layered beds
    Pigorini, G
    LeVan, MD
    [J]. INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH, 1997, 36 (06) : 2296 - 2305
  • [7] TOUSSAINT LJ, 1993, Patent No. 5203887
  • [8] WATSON CF, 1996, Patent No. 5529610