24 - chicago, IL, Georetown NECAT—Jte equivalent amount...

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Chemistry 4/24 HOMEWORK!!!! 15,16,17,18,0,21,24,25 Fuel Cell William Grove 1839 English physicist 1960s US Space Program NASA H2 + ½ O2 --> H20 g g l H2 --> 2H+ + 2e- 1/202 + 2H2+ + 2e_ --> H2O
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PEM (polymeric electrolyte membrane) is impregnated with a metal catalyst (Pt) to oxidized H2 --> 1H+ + 2e- H+ migrates through membrane and combines with e- and O2 to form H2O reduction PEM must be moist at all times High temps may evaporate moisture, fuel cell stops working H+ + H2O --> H3O+ Internal combustion engines convert only 20-30% of the fuel into usable energy Fuel cells can be as much as 70% efficient transferes protons w/o moisture H2 gas is formed by catalytic decomp of CH3OH Promising technology for a small power plant Combines ZrO2 + CaO
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power grids power-generating modules of 30 MW or less near the end user 150 fuel cell plants world wilde microcells, small and compact power lawn mower, laptop, cell phone New Electric Car (NECAR 5, A-Class Mercedes 25 mpg, 250 mile no refuel, speeds of 90 mph
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Unformatted text preview: chicago, IL, Georetown NECAT—Jte equivalent amount of hydropgen that it would get normally would be WAYYYY less Pollution-free more energy efficient no moving parts no recha No large buky H2 storage containers Production, dorage and dishttp://www.action.org/website/article.asp? id=2751 Ggeneral Moyers Saturn EV1 Hybrid cars combine conventional gasoline engines with battery technology Hydrogen Fuel Cells H2 and O2 moisture (metal) Electrolysis power plants (impractical) H2SO4 + Zn --> ZnSO4 + H2 Too expensive to slace up 1331 kJ + H2O + C --> H2 + CO impractical due to high temp researching a catalyst thermally decompostion waster into H2 and O2 requires extremely high temp NOT practical, too much energy 165 kJ + CH4 + 2H2 --> CO2 chief source of H2 Need to improve reaction efficiency oil, coal, natural gas, nuclear fission biomass burning H2 burning Hydroelectric power 14 wks start on the 1 st of september...
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This note was uploaded on 05/05/2008 for the course CHEM 104 taught by Professor Splawn during the Spring '08 term at Wofford.

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24 - chicago, IL, Georetown NECAT—Jte equivalent amount...

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