Show simple item record

dc.contributor.authorSkerritt, Mark
dc.contributor.otherQueen's University (Kingston, Ont.). Theses (Queen's University (Kingston, Ont.))en
dc.date2013-04-10 16:34:34.446en
dc.date2013-04-12 17:16:37.724en
dc.date.accessioned2013-04-15T20:41:52Z
dc.date.available2013-04-15T20:41:52Z
dc.date.issued2013-04-15
dc.identifier.urihttp://hdl.handle.net/1974/7875
dc.descriptionThesis (Master, Chemistry) -- Queen's University, 2013-04-12 17:16:37.724en
dc.description.abstractThe thermally regenerative fuel cell (TRFC) concept that is analyzed is a polymer electrolyte membrane fuel cell (PEMFC), powered by the electro-oxidation of H2 and the electro-reduction of propiophenone. The main products of this fuel cell should be 1-phenyl-1-propanol and electricity. The 1-phenyl-1-propanol should then be converted back to propiophenone, while hydrogen is regenerated by using waste heat and a metal catalyst (Pd/SiO2). The first objective was to find a compatible polymer that would work as either an ionomer/binding agent and as a membrane in the membrane electrode assembly (MEA) of the TRFC. This was achieved by checking the compatibility of each polymer with 1-phenyl-1-propanol and propiophenone (the alcohol-ketone pair). Catalyst coated gas diffusion layers or catalyst coated membranes were made to test the stability of the polymers in the catalyst bed when exposed to the alcohol-ketone pair. If the polymer was compatible with the alcohol-ketone pair, MEAs were constructed using this polymer. The second objective was to test these MEAs inside a H2/propiophenone fuel cell that would prove the concept of our envisioned TRFC. It was found that the only polymer that was stable in the alcohol-ketone pair was mPBI (m-phenylene polybenzimidazole). The mPBI had to be doped with H3PO4 to enable H+ conductivity. Unfortunately, some H3PO4 leached out of the H3PO4-doped mPBI when in the presence of the alcohol-ketone pair. MEAs that were created using H3PO4-doped mPBI were found to work for H2/air and H2/propiophenone fed PEMFCs. The best performance achieved with the H2/propiophenone powered fuel cell was 6.23 μW/cm2. Unfortunately, the presence of the 1-phenyl-1-propanol product could not be proved by EIS or CV on the fuel cell, or by GC-FID of the cathode effluent. Other unknown products were seen in the GC-FID spectrum of the cathode effluent. Therefore, it is possible that the propiophenone did reduce at the cathode but it produced an unknown product. In conclusion, the viability of the proposed TRFC system was not verified. H3PO4 leaching from the MEA makes it impossible to use H3PO4-doped mPBI as the electrolyte in the final version of the MEA in the TRFC system.en_US
dc.languageenen
dc.language.isoenen_US
dc.relation.ispartofseriesCanadian thesesen
dc.rightsThis publication is made available by the authority of the copyright owner solely for the purpose of private study and research and may not be copied or reproduced except as permitted by the copyright laws without written authority from the copyright owner.en
dc.subjectNafionen_US
dc.subjectPEMFCen_US
dc.subjectmPBIen_US
dc.subjectPolymeren_US
dc.subjectElectrochemistryen_US
dc.subjectFuel Cellen_US
dc.subjectPolybenzimidazoleen_US
dc.titleTowards a Membrane Electrode Assembly for a Thermally Regenerative Fuel Cellen_US
dc.typeThesisen_US
dc.description.degreeMasteren
dc.contributor.supervisorJessop, Philip G.en
dc.contributor.supervisorPeppley, Brant A.en
dc.contributor.departmentChemistryen


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record