Effect of impurities on ultra-pure hydrogen production by pressure vacuum swing adsorption

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dc.contributor.authorGolmakani, Ayub
dc.contributor.authorNabavi, Seyed Ali
dc.contributor.authorManovic, Vasilije
dc.date.accessioned2019-11-06T10:24:59Z
dc.date.available2019-11-06T10:24:59Z
dc.date.issued2019-10-29
dc.description.abstractThe most viable technology for production of ultra-pure hydrogen (>99.99%), required for fuel cells, is steam methane reforming (SMR) coupled with pressure vacuum swing adsorption (PVSA). A PVSA process with a two-layer bed of activated carbon (AC)/zeolite 5A for ultra-pure hydrogen production from syngas was developed and simulated with the aim of exploring the effect of impurities on energy intensity of the process. The simulated concentration profiles showed that CH4 was removed by first half of the AC layer, CO2 and CO were mostly removed by the end of that layer, but zeolite 5A (the second layer) could not completely remove the remaining N2. Further, the effect of the N2 on performance of the PVSA process was demonstrated by simulating purification of two feeds with 3.1 and 1.1 vol% N2, respectively. The 2% drop in N2 concentration in the syngas feed resulted in decreased energy consumption of the PVSA process from 940 kJ/kg to 430 kJ/kg H2, while H2 recovery increased from 47% to 55%. Therefore, the presence of N2 has a very large impact on recovery and energy intensity of the ultra-pure hydrogen production process, and development of adsorbents with better N2 removal performances is required.en_UK
dc.identifier.citationGolmakani A, Nabavi SA, Manović V. (2019) Effect of impurities on ultra-pure hydrogen production by pressure vacuum swing adsorption. Journal of Industrial and Engineering Chemistry, Volume 82, February 2020, pp. 278-289en_UK
dc.identifier.issn1226-086X
dc.identifier.urihttps://doi.org/10.1016/j.jiec.2019.10.024
dc.identifier.urihttp://dspace.lib.cranfield.ac.uk/handle/1826/14681
dc.language.isoenen_UK
dc.publisherElsevieren_UK
dc.rightsAttribution-NonCommercial-NoDerivatives 4.0 International*
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/*
dc.subjectsyngas impuritiesen_UK
dc.subjectpressure vacuum swing adsorptionen_UK
dc.subjectfuel cell specificationsen_UK
dc.subjectcyclic adsorption processen_UK
dc.subjecthydrogen productionen_UK
dc.titleEffect of impurities on ultra-pure hydrogen production by pressure vacuum swing adsorptionen_UK
dc.typeArticleen_UK

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