Sökning: "fuel cell"

Visar resultat 31 - 35 av 294 avhandlingar innehållade orden fuel cell.

1. 31. Development of a methanol reformer for fuel cell vehicles

   Författare :Bård Lindström; KTH; []
   Nyckelord :methanol; fuel cell vehicles; reforming; catalysis; partial oxidation; steam reforming; combined reforming;

   Sammanfattning : Vehicles powered by fuel cells are from an environmentalaspect superior to the traditional automobile using internalcombustion of gasoline. Power systems which are based upon fuelcell technology require hydrogen for operation. The ideal fuelcell vehicle would operate on pure hydrogen stored on-board. LÄS MER

3. 32. New Materials for the Molten Carbonate Fuel Cell

   Författare :Sara Randström; Carina Lagergren; Michel Cassir; KTH; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Molten Carbonate Fuel Cell; Anode current collector; Cathode; Wet-seal; Ionic liquid; TFSI; Smältkarbonatbränslecell; Anodströmtilledare; Katod; Wet-seal; Jonvätska; TFSI; Electrochemistry; Elektrokemi;

   Sammanfattning : Smältkarbonatbränslecellen (MCFC) är en högtemperaturbränslecell för stationära applikationer. Den har samma höga totalverkningsgrad som konventionella kraftvärme-anläggningar, men kan byggas i mindre moduler (från 250 kWe). LÄS MER

4. 33. Electrochemical Reactions in Polymer Electrolyte Fuel Cells

   Författare :Maria Wesselmark; Svein Sunde; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Fuel cell; model electrodes; oxygen reduction; methanol oxidation; formic acid oxidation; hydrogen oxidation; CO oxidation; degradation; tungsten oxide; carbon support; Bränslecell; modellelektroder; syrgasreduktion; metanoloxidation; myrsyraoxidation; vätgasoxidation; CO oxidation; degradering; wolfram oxid; kolsupport; Chemical engineering; Kemiteknik;

   Sammanfattning : The polymer electrolyte fuel cell converts the chemical energy in a fuel, e.g. hydrogen or methanol, and oxygen into electrical energy. The high efficiency and the possibility to use fuel from renewable sources make them attractive as energy converters in future sustainable energy systems. LÄS MER

5. 34. Transition metal ion-chelating ordered mesoporous carbons as noble metal-free fuel cell catalysts

   Författare :Johanna Dombrovskis; Chalmers tekniska högskola; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; mesoporous materials; electrocatalysis; EXAFS spectroscopy; fuel cell; transition metals; carbon;

   Sammanfattning : Polymer electrolyte membrane fuel cells offer promising possibilities for clean and efficient chemical to electrical energy conversion, though their high price makes them financially unappealing. This is to a large part due to the high cost of the noble metal catalyst used in fuel cells, which makes development of new, cheap and active catalyst materials necessary. LÄS MER

7. 35. Modelling and experimental investigation of the porous nickel anode in the molten carbonate fuel cell

   Författare :Mari Sparr; Göran Lindbergh; Kas Hemmes; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Chemical engineering; molten carbonate fuel cell; MCFC; mechanism; cell modelling; porous electrode; Kemiteknik; Chemical engineering; Kemiteknik;

   Sammanfattning : The thesis is focussed on the performance of the fuel cell and the design of the cell for operation with natural gas and renewable fuels, e.g. biogas or gasified biomass. The performance is one of the important issues for the development and commercialisation of fuel cell stacks. LÄS MER