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METHANE MOLECULE. METHANE MOLECULE. METHANE MOLECULE. METHANE MOLECULE. METHANE MOLECULE. hydrogen. carbon. hydrogen. hydrogen. hydrogen. METHANE MOLECULE. Common names : Methyl hydride Carbon tetrachloride Marsh gas. METHANE MOLECULE. Properties: Molar mass; 16.04 g/ mol

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METHANE MOLECULE


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    1. METHANE MOLECULE

    2. METHANE MOLECULE

    3. METHANE MOLECULE

    4. METHANE MOLECULE

    5. METHANE MOLECULE hydrogen carbon hydrogen hydrogen hydrogen

    6. METHANE MOLECULE • Common names : • Methyl hydride • Carbon tetrachloride • Marsh gas

    7. METHANE MOLECULE • Properties: • Molar mass; 16.04 g/mol • Bond angle=109.5°,Bond distance=108.70pm • Boiling point= -161.6°C,colorless gas, • Highly flammable • Green house gas (high global warming potential) • Natural gas

    8. METHANE MOLECULE

    9. METHANE MOLECULE Typical Composition of Natural Gas Methane CH4 70-90% Ethane C2H6 0-20% Propane C3H8 Butane C4H10 Carbon Dioxide CO2 0-8% Oxygen O2 0-0.2% Nitrogen N2 0-5% Hydrogen sulphide H2S 0-5% Rare gases A, He, Ne, Xe trace

    10. METHANE MOLECULE

    11. METHANE MOLECULE

    12. METHANE MOLECULE

    13. METHANE MOLECULE • Methane concentration in the atmosphere. • During glacial period: 300 and 400 nmol/mol • During interglacial periods: 600 to 700 nmol/mol • In 2010: 1850 nmol/mol (a level described as being higher than at any time in the previous 400,000 years) • Net lifetime is about 10 years • Removal from the atmosphere: CH4 + OH ---> CO2 + water

    14. METHANE MOLECULE • Sources of methane: • Methane clathrates in the ocean floor (large amount of methane is trapped within a crystal structure of water, forming a solid similar to ice.) • Earth’s crust thru methanogenesis (formation of methane by microbes known as methanogens) • Mud volcanoes • Landfill • Livestock (ruminants) from enteric fermentation

    15. METHANE MOLECULE

    16. METHANE MOLECULE

    17. METHANE MOLECULE • Reactions of methane • Theoretical formaldehyde reaction • CH4 ----> H2CO • Removal from the atmosphere • CH4 + OH ---> CO2 + water • As fuel • CH4 + 2O2 --> CO2 + 2 H2O ∆H = - 891 KJ/mole

    18. METHANE MOLECULE • Uses: • In some cities, methane is piped into homes for domestic heating. • It can be used as vehicle fuel.

    19. METHANE MOLECULE • Uses: • In some cities, methane is piped into homes for domestic heating. • It can be used as vehicle fuel.

    20. METHANE MOLECULE • Uses: • In some cities, methane is piped into homes for domestic heating. • It can be used as vehicle fuel. • NASA is conducting study on its potential as rocket fuel. • There has been coal mines with its methane successfully converted to electricity.

    21. Group Two Members

    22. THANK YOUVERY MUCH

    23. For listening!

    24. METHANE MOLECULE • Correction: September 21, 2008 • Because of an editing error, an article last Sunday about the conversion of methane at landfills into energy misstated the process used to create power at the Covanta Energy Corporation’s American Ref-Fuel incinerator in Hempstead, N.Y. The power results from the combustion of solid waste, not from the capturing of methane.