H20-Splitting Presentation

H20-Splitting Presentation - Hydrogen Generation Hydrogen...

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Hydrogen Generation Hydrogen Generation Analyzing the viability of Hydrogen as a mobile energy carrier
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HydroN ū c, Inc. 2 9/23/2005 3 Power Source 8 Plant Design Analysis 1 Introduction Sources of Energy 4 Decision of Location-Nuclear 2 7 Molecular Discovery 9 Conclusions Why Are We Interested in Hydrogen? Hydrogen Technologies Hydrogen Generation Relative Cost Advantages of Hydrogen Disadvantages of Hydrogen Market Environment 6 Thermodynamic Analysis 5 Cycles and Previous Studies
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HydroN ū c, Inc. 3 9/23/2005 Why Are We Interested in Hydrogen? • It is abundant and can be produced locally • No pollution • Hydrogen is a clean energy carrier • Fossil fuels are limited • Renewable resource
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HydroN ū c, Inc. 4 9/23/2005 Hydrogen Technologies • Steam Reforming • Electrolysis • Thermochemical
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HydroN ū c, Inc. 5 9/23/2005 Hydrogen Generation • Steam reforming of methane accounts for the 50 million tons of hydrogen used world-wide • Electrolysis is a mature technology and is used primarily for the production of high purity oxygen and hydrogen • Hydrogen produced by high temperature thermo- chemical processes has not been demonstrated on a commercial scale – Promises high efficiency production in the future
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HydroN ū c, Inc. 6 9/23/2005 Relative Cost •H 2 produced by methane reforming —$0.80/kg •H 2 produced by electrolysis —$3.00/kg @ $0.06/kWh •H 2 $1.30/kg
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HydroN ū c, Inc. 7 9/23/2005 Advantages of Hydrogen • Hydrogen can be totally non-polluting (water is the exhaust). • Hydrogen can be economically competitive with gasoline or diesel. • Hydrogen is just as safe as gasoline, diesel, or natural gas. – The self-ignition temperature of hydrogen is 550 degrees Celsius. – Gasoline varies from 228-501 degrees Celsius • Hydrogen can help prevent the depletion of fossil fuel reserves. • Hydrogen can be produced in any country.
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HydroN ū c, Inc. 8 9/23/2005 Disadvantages of Hydrogen • Hydrogen production is energy intensive • Low density, resulting in: – large volumes – low temperatures – high pressures • Complex systems required for storage
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HydroN ū c, Inc. 9 9/23/2005 Market Environment-Global Purchased Hydrogen
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HydroN ū c, Inc. 10 9/23/2005 Market Environment-Our Target • Hydrogen Fuel Cell Cars – Why HFC Cars? • No byproducts concerning the environment • Gas equivalent value of hydrogen is $4.75/kg • Why not the current users of hydrogen? – Not competitive with steam reforming – Steam reforming will not work for this market • More profitable to sell the CNG directly • CNG has environmental issues (CO 2 , NO x , Inefficiency of internal combustion engine)
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HydroN ū c, Inc. 11 9/23/2005 Market Environment-Hydrogen Prices – Historical (1997 - 2002) Steam Reformed Methane • High, $ 2.60 per 100 SCF, compressed gas, tube trailer • Low, $1.25, same basis. – Current: $1.70 to $2.60 same basis;
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This note was uploaded on 08/31/2011 for the course CHE 4273 taught by Professor Staff during the Spring '10 term at Oklahoma State.

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H20-Splitting Presentation - Hydrogen Generation Hydrogen...

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