The production of hydrogen through the use of a 77 wt% Pd 23 wt% Ag membrane water gas shift reactor

Simple item page
dc.contributor.authorBaloyi, Liberty N.
dc.contributor.authorNorth, Brian C.
dc.contributor.authorLangmi, Henrietta W.
dc.contributor.authorBladergroen, Bernard Jan
dc.contributor.authorOjumu, Tunde V.
dc.date.accessioned2017-05-17T07:24:05Z
dc.date.available2017-05-17T07:24:05Z
dc.date.issued2016
dc.description.abstractHydrogen as an energy carrier has the potential to decarbonize the energy sector. This work presents the application of a palladium-silver (PdeAg) membrane-based reactor. The membrane reactor which is made from PdeAg film supported by porous stainless steel (PSS) is evaluated for the production of hydrogen and the potential replacement of the current two-stage Water-Gas Shift (WGS) reaction by a single stage reaction. The permeability of a 20 mmPdeAg membrane reactor was examined at 320° C, 380° C and 430° C. The effect of continuous hydrogen exposure on the PdeAg membrane at high temperature and low temperature was examined to investigate the thermal stability and durability of the membrane. During continuous operation to determine thermal stability, the membrane reactor exhibited stable hydrogen permeation at 320° C for 120 h and unstable hydrogen permeation at 430° C was observed. For the WGS reaction, the reactor was loaded with Ferrochrome catalyst. The membrane showed the ability to produce high purity hydrogen, with a CO conversion and an H2 recovery of 84% and 88%, respectively. The membrane suffered from hydrogen embrittlement due to desorption and adsorption of hydrogen on the membrane surface. SEM analysis revealed cracks that occurred on the surface of the membrane after hydrogen exposure. XRD analysis revealed lattice expansion after hydrogen loading which suggests the occurrence of phase change from a-phase to the more brittle b-phase.en_US
dc.description.accreditationDHETen_US
dc.identifier.citationBaloyi, L. N. et al. (2016). The production of hydrogen through the use of a 77 wt% Pd 23 wt% Ag membrane water gas shift reactor. South African Journal of Chemical Engineering, 22: 44-54en_US
dc.identifier.issn1026-9185
dc.identifier.urihttp://hdl.handle.net/10566/2841
dc.identifier.urihttp://dx.doi.org/10.1016/j.sajce.2016.11.001
dc.language.isoenen_US
dc.privacy.showsubmitterFALSE
dc.publisherElsevieren_US
dc.rights© 2016 The Authors. Published by Elsevier B.V. on behalf of Institution of Chemical Engineers. This is an open access article under the CC BY-NC-ND license (http:// creativecommons.org/licenses/by-nc-nd/4.0/).
dc.status.ispeerreviewedTRUE
dc.subjectHydrogenen_US
dc.subjectEnergyen_US
dc.subjectThermal stabilityen_US
dc.subjectMembrane reactoren_US
dc.subjectPalladium-silveren_US
dc.subjectHydrogen permeationen_US
dc.subjectHydrogen fluxen_US
dc.subjectWater-gas shift reactionen_US
dc.titleThe production of hydrogen through the use of a 77 wt% Pd 23 wt% Ag membrane water gas shift reactoren_US
dc.typeArticleen_US

Files

Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
Baloyi_The production_2017.pdf
Size:
1.81 MB
Format:
Adobe Portable Document Format
Description:
Download

Collections

Research Articles (Chemistry)