Effects of the Residence Time in Four-Bed Pressure Swing Adsorption Process

Authors: Yang, Se-Il¹; Park, Ju-Yong¹; Choi, Dae-Ki¹; Kim, Sung-Hyun²

Source: Separation Science and Technology, Volume 44, Number 5, January 2009 , pp. 1023-1044(22)

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Abstract:

Hydrogen separation by the four-bed PSA process using layered beds of activated carbon and zeolite 5A was investigated experimentally and theoretically to recover high purity H2 from steam methane reforming off-gas. The recovery increased with increasing the residence time at given product purity because of the contact time between the impurities and the adsorbents is increased. The difference of increasing the recovery became smaller with increasing the residence time and then the recovery was not increased after 43.6 seconds of the residence time. The minimum residence time exists to obtain the maximum recovery at desired product purity (99.999%+).

Keywords: Hydrogen; pressure swing adsorption; residence times

Document Type: Research article

DOI: http://dx.doi.org/10.1080/01496390902729122

Affiliations: 1: Energy and Environment Research Division, Korea Institute of Science and Technology, Cheongryang, Seoul, Korea 2: Department of Chemical and Biological Engineering, Korea University, Seoul, Korea

Publication date: 2009-01-01