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Part1 jt gts rng session 030511
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Part1 jt gts rng session 030511



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  • 1. Renewable Natural Gas (RNG)
    RNG as a Transportation Fuel
    What is it?
    Where does it come from?
  • 2. CALSTART: A Strategic Broker for Advanced Transportation
    130+ Worldwide Participant Network
    3 Offices in US
    Four focus areas:
    Tech Commercialization
    Fleet, Port Consulting
    Industry Services
    Policy Development
    National and International in Project Areas
  • 3. Methane
    Natural gas
    Natural Gas & RNG
    Renewable Fuel
    Fossil Fuel
    Less GHG Emissionsthan Petroleum
    Net zero or negative GHG Emissions
  • 4. Renewable Natural Gas
    RNG is renewable
    Net zero or even negative GHG emissions
    Climate change will become the predominant driver going forward
    NG vehicle market growing in CA (20% transit are NGV)
    NG is 30% cheaper than gasoline
    Filling stations
    Renaissance in interest in biomethane in CA
  • 5. RNG, Biomethane & Biogas
    Biogas is a naturally occurring byproduct of decomposing organic material
    Sources: municipal solid waste, animal waste agricultural waste, etc…
    RNG or Biomethane is cleaned-up biogas after removal of CO2, H2O, H2S, and other
    RNG is identical in composition to natural gas – mostly methane (CH4)
  • 6. Waste as Source of Energy
    US largest producer of waste in the world
    Huge possibilities in recycling and using as energy feedstock
    CA generates ~ 88 million tons of waste; 60 million tons of organic waste = 2 GW potential energy
    CA has 2,000 dairy farms = 2GW potential energy
  • Process flow for AD creation of RNG
  • 12. Biogas & RNG: Economic Assessment
    RNG (Biomethane) is a renewable and low-carbon transportation fuel
    What are the costs?
    Based on actual production cost data from agricultural farm waste
    Biogas production via digestion
    Upgrading biogas to biomethane
    Total cost of biomethane produced can be competitive with conventional natural gas
    $9-11/MMBTU for small facility
    $6-8/MMBTU for medium facility
    vs $5-8/MMBTU market price for NG (variable - lower right now - $4)
    Off-the-Shelf Equipment is Used to Upgrade Digester Gas to Transportation Quality Biomethane
  • 13. Biomethane is the Lowest Carbon Fuel Tested by CARB
    Biomethane has the lowest carbon content of any fuel analyzed by CARB:
    Fuel Pathway Impact (gCO2e/MJ)
    Landfill gas to renewable CNG 11.26
    Biogas to renewable CNG 13.45
    Landfill gas to renewable LNG 15.56
    Biogas to renewable LNG 17.78
    Electricity (best case renewable mix) 34.90
    Hydrogen (best case scenario) 33.09
    Ethanol (Corn - best case) 46.60*
    Ethanol (Brazilian sugarcane) 27.40*
    Ethanol (Forest waste – best case) 21.40
    Gasoline (CA reformulated) 96.09
    Diesel (ULSD) 94.71
    Fossil (conventional) Natural Gas 68.00
    *Does not include indirect land use change emissions for ethanol
    • Greater than 80% carbon reduction compared with conventional fuels
    • 14. Less than half the carbon emissions of electricity and H2
    • 15. Lower carbon emissions than cellulosic ethanol
    Other Alt. Fuels
    Fossil Fuels
  • 16. Natural Gas is a Proven and Reliable Alternative Fuel
    More than 6,000 buses are powered by natural gas in the United States – most of which are in Southern California
    CA has an impressive network of >150 public NG refueling stations that make driving any where in the state feasible
    RNG could easily supply all CA NG vehicles:
    Nearly 15 billion ft3 potential
    About 1.4 billion GGEs