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L05-prod1 - LECTURE LECTURE 5 TOPIC TOPIC TOPIC Hydrogen...

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Hydrogen Production 1 8/19/2005 TOPIC TOPIC: Hydrogen Production LECTURE LECTURE # # 5
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Hydrogen Production 2 8/19/2005 Hydrogen Systems Hydrogen Systems Hydrogen Hydrogen Production Plants Production Plants Liquid H Liquid H 2 Gaseous H Gaseous H 2 Jet Engines Jet Engines IC Engines IC Engines Fuel Cells Fuel Cells Flame Combustors Flame Combustors Catalytic Combustors H 2 / O 2 steam generators steam generators Fuel Cells Transportation Transportation Thermal Energy Thermal Energy Electric Power Source:
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Hydrogen Production 3 8/19/2005 square4 Steam reformation (SMR) square4 Partial oxidation (POX) square4 Coal gasification (CG) square4 Biomass gasification (BG) square4 Electrolysis square4 Grid (Coal, Nuclear) square4 Wind Power square4 Solar Photovoltaic square4 Solar Thermal Power square4 Thermal Cracking square4 Photochemical square4 Photo-electrochemical square4 Thermochemical cycles square4 Solar Thermal square4 Nuclear square4 Biological production square4 Thermal Dissociation square4 Photodegradation Production Production Technologies Technologies Source:
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Hydrogen Production 4 8/19/2005 boxshadowdwn SMR takes a light hydrocarbon feedstock, usually methane, reacts it at elevated temperatures (700 - 925 0 c) with steam to produce H 2 and CO boxshadowdwn Catalyst is required which undergoes desulfurization prior to entering the reformed boxshadowdwn Water-gas shift reaction (around 350 0 c) to produce additional H 2 and CO 2 boxshadowdwn H 2 and CO 2 mixture is purified and separated Steps in SMR Steam Methane Steam Methane Reformation Reformation
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Hydrogen Production 5 8/19/2005 2 2 2 2 H m n nCO O nH H C m n + + + 2 2 2 H CO O H CO Chemical reactions involved boxshadowdwn Initial gas production boxshadowdwn Water-gas shift reaction Steam Methane Steam Methane Reformation Reformation
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Hydrogen Production 6 8/19/2005 Reform er Fuel is catalytically converted to syngas. Som e carbon dioxide and unreacted fuel rem ains.
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