20.500.12556/RUL-182036 Eksperimentalna analiza vpliva sestave reformnega plina na delovanje visokotemperaturne gorivne celice s protonsko izmenjevalno membrano Experimental analysis of the effect of reformate gas composition on high-temperature proton exchange membrane fuel cell performance Ker shranjevanje in transport čistega vodika predstavljata tehnološki in logistični problem, se kot primerna alternativa ponuja metanol. S procesom reformiranja se metanol pretvori v reformni plin, ki poleg vodika vsebuje tudi nečistoče in glavni sta ogljikov dioksid (CO₂) in ogljikov monoksid (CO). Te nečistoče neugodno vplivajo na učinkovitost delovanja, zato je raziskava usmerjena v tehnologijo HT-PEMFC, ki zaradi obratovanja pri povišanih temperaturah bolje tolerira prisotnost omenjenih inhibitorjev. Izvedena je primerjava odziva dveh različnih membransko elektrodnih sklopov (MEA): s pred-dopirano in s post-dopirano PBI membrano. Glavni cilj raziskave je eksperimentalno ovrednotiti vpliv različnih deležev CO₂ in CO na elektrokemične karakteristike gorivne celice. Metodologija obsega sistematično izvajanje meritev ob dovajanju inhibitorjev pri obratovalnih temperaturah 160 °C in 170 °C. Za karakterizacijo in ločevanje notranjih mehanizmov izgub so uporabljene metode: polarizacijske krivulje, elektrokemična impedančna spektroskopija (EIS) ter analiza distribucije relaksacijskih časov (DRT). Since the storage and transport of pure hydrogen present technological and logistical challenges, methanol serves as a suitable alternative. Through the reforming process, methanol is converted into reformate gas, which, in addition to hydrogen, contains impurities, primarily carbon dioxide (CO₂) and carbon monoxide (CO). These impurities negatively affect operational efficiency, therefore, this research focuses on High Temperature Proton Exchange Membrane Fuel Cell (HT-PEMFC) technology, which better tolerates the presence of these inhibitors due to operating at elevated temperatures. A comparison of the response of two different membrane electrode assemblies (MEAs) is conducted: one with a pre-doped and the other with a post-doped PBI membrane. The main objective of the research is to experimentally evaluate the impact of varying fractions of CO₂ and CO on the electrochemical characteristics of the fuel cell. The methodology entails systematic measurements during the introduction of inhibitors at operating temperatures of 160 °C and 170 °C. To characterize and separate the internal loss mechanisms, the following methods are employed: polarization curves, electrochemical impedance spectroscopy (EIS), and distribution of relaxation times (DRT) analysis. HT-PEMFC vodik reformni plini pred-dopirane membrane post-dopirane membrane inhibitorji HT-PEMFC hydrogen reformate gas pre-doped membrane post-doped membrane inhibitor true false false [U. Kukenberger] Slovenski jezik Angleški jezik Magistrsko delo/naloga 2026-04-23 08:30:26 2026-04-23 08:30:40 2026-05-05 09:51:57 0000-00-00 00:00:00 2026 0 Ljubljana 0 XX, 92 str. 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 621.357:62-622(043.2) 285536 277024259 46820.pdf 46820.pdf 1 45B06BE2C6B085F5F90BDB76C0E454F4 a5d0a4d15e2c18792af08c0bc9bfc65157a6cdc6aa5b136b3a81182d4460795f b3491d69-3edd-11f1-b0ab-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=232954 Fakulteta za strojništvo 0 0 0