fuel comb chp2 fuels slides

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و احتراق سوخت فصل دوم: ستی و زیلی، مصنوعی فسی سوخت های ترم دوم94 - 1393 ارتیزش حرلی نسبی و ار چگاRelative density and heating value

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درس سوخت و احتراق دانشگاه شریف

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  • 3931-49 :

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  • : 94-1393

    (1)

    [C]coal + O2 CO2

    2[C]coal + O2 2 CO

    [C]coal + CO2 2CO

    [C]coal + 2H2 CH4

    [C]coal + H2O CO + H2

    CO+H2O CO2 + H2

    CO + 3H2 CH4 + H2 O

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    )2(

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    )3(

  • : 94-1393

    Gasification & Gas cleaning

    FT synthesis

    FT product separation and

    upgrading

    Electric power generation

    Coal Oxygen/steam Iron catalyst

    H2+CO syngas

    steam

    Sulfur, Mercury, CO2 and ash

    Electricity

    Water And oxygenates

    Ultra-clean Liquid fuels & chemical Feedstocks

    CxHy Liquid & wax

    steam Tail gas

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    )GNL( saG larutaN deifeuqiL

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    OC2+2OC2O2+C3

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    OC+2HO2H+C

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    2H+2OCO2H+OC

  • : 94-1393

    Steam reforming Methane

    CH4+H2O 3H2+CO (H298K= +97,400 Btu/lb)

    General hydrocarbon CnHm+nH2O (n+m/2)H2+nCO

    Reactions of carbon with steam CH4 2H2+C C+H2O H2+CO

    Water-gas shift reaction CO+H2OCO2+H2 (H298K= -16,500 Btu/lb)

    Partial Oxidation (POx)

    2CH4+O2 4H2+2CO (H298K= -10,195 Btu/lb)

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    DME (Dimethyl Ether)

    Coal

    Natural Gas

    Organic Waste H2+CO

    Biomass

    Gas

    ific

    atio

    n

    Wind Hydro Solar Wave

    Nuclear

    Elec

    tric

    ity

    Water electrolysis

    H2

    DME

    +CO

    2

    CO2 capture

  • : 94-1393

    Property (unit/condition) DME Diesel fuel

    Chemical formula CH3-O-CH3

    Mole weight (g) 46.07 170

    Boiling point (C) -24.9 180360

    Liquid density (g/cm3) 0.668 0.84

    Liquid viscosity (cP) 0.15 4.4-5.4

    Low heat value (MJ/kg) 28.43 42.5

    Ignition temperature (C) 235 250

    Cetane number 55-60 40-55

    Stoichiometric air/fuel ratio (kg/kg) 9.0 14.6

    %wt of carbon 52.2 86

    %wt of hydrogen 13.0 14

    % wt of oxygen 34.8 0

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    H

    Natural gas

    Renewable electrolysis

    Coal gasification

    Renewable liquid reforming

    Nuclear high temperature electrolysis

    Photobiological

    H

    Compressed Hydrogen

    Cryogenic liquid

    Chemical storage in metal hydrates

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    Pyrolysis

    Pyrolysis Biomass Condensation

    Char

    Vapor

    Combustion

    Catalytic conversion to Hydrogen (Optional)

    Liquids

    Pow

    er generatio

    n o

    r ch

    em

    ical sep

    aration

    Gases (H2, CO, CH4, C2H2, C2H4)

    Heat

  • : 94-1393

    Anaerobic digestion

    Carbohydrates

    Fats

    Proteins

    Sugars

    Fatty Acids

    Amino Acids

    Carbon acids alcohols

    Hydrogen Carbon Dioxide

    Ammonia Acid acetic

    Carbon dioxide hydrogen

    Meth

    ane

    Carb

    on

    dio

    xide

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