Presentation on theme: "ALTERNATIVE FUEL. The U.S. Department of Energy (DOE) defines an alternative fuel as a product that is substantially nonpetroleum which yields energy."— Presentation transcript:
The U.S. Department of Energy (DOE) defines an alternative fuel as a product that is substantially nonpetroleum which yields energy security and environmental benefits.
The Energy Policy Act of 1993 (EPAct) DOE currently recognizes the following as alternative fuels: Mixtures containing 85% or more by volume of alcohol fuel, including methanol and denatured ethanol
Natural gas (compressed or liquefied) Liquefied petroleum gas (propane) Hydrogen Coal-derived liquid fuels
Fuels derived from biological materials Electricity (including electricity from solar energy) 100% Biodiesel (B100)
Pure biodiesel (B100) is considered an alternative fuel under EPAct. But lower-level biodiesel blends are not considered alternative fuels
What are the characteristics of alternative fuels?
ALTERNATIVE FUEL VEHICLES
Ethanol Ethanol is an alcohol-based alternative fuel produced by fermenting and distilling starch crops that have been converted into simple sugars. Feedstocks for this fuel include corn, barley, and wheat.
Ethanol can also be produced from "cellulosic biomass" such as trees and grasses and is called bioethanol. Ethanol is most commonly used to increase octane and improve the emissions quality of gasoline.
Natural Gas Natural gas is a mixture of hydrocarbons, mainly methane, and is produced either from gas wells or in conjunction with crude oil production. Natural gas is consumed in the residential, commercial, industrial, and utility markets. Natural gas can either be stored onboard a vehicle as compressed natural gas (CNG) or as liquefied natural gas (LNG). Natural gas can also be blended with hydrogen.
Natural Gas The future holds great potential for natural gas because it can potentially be used in fuel cell vehicles to make hydrogen. Researchers found that fuel cell vehicles using hydrogen produced from natural gas could present an attractive solution for cutting greenhouse gas emissions.
Propane Propane or liquefied petroleum gas (LPG) is a popular alternative fuel choice for vehicles. Propane is produced as a by- product of natural gas processing and petroleum refining so there is already an infrastructure of pipelines, processing facilities, and storage for its efficient distribution.
Hydrogen The simplest and lightest fuel is hydrogen gas. Hydrogen may contain low levels of carbon monoxide and carbon dioxide, depending on the source.
Hydrogen Hydrogen can be produced using diverse, domestic resources including fossil fuels, such as natural gas and coal, nuclear; and biomass and other renewable energy technologies, such as wind, solar, geothermal, and hydro-electric power.
Hydrogen Hydrogen will play an important role in developing sustainable transportation in the United States, because in the future it may be produced in virtually unlimited quantities using renewable resources.
Hydrogen Hydrogen is being explored for use in combustion engines and fuel cell electric vehicles. The energy density of hydrogen is very low under ambient conditions which presents greater transportation and storage hurdles than for liquid fuels. Storage systems are being developed to address these problems.
HCNG DOE's Natural Gas Vehicle Technology is supporting a project to develop heavy-duty HCNG engines and transit buses. The HCNG (20% hydrogen / 80% CNG) engines demonstrated lower emissions than similar engines fueled by CNG alone. This blend provided no significant change in fuel efficiency.
Electricity Trucks with a hybrid-electric powertrain combine a diesel engine and electric motor to drive the vehicle.
Electricity Batteries capture and store energy providing a source of stored electric power for the motor during future acceleration.
Electricity All electrical charging of the battery is provided by the hybrid electric powertrain, and no external electrical infrastructure, such as a power cord or electrical outlet, is needed.
Electricity The balance between conventional and electric technology is an innovative method to improve environmental performance and decrease fuel use while eliminating the need for high electrical- demand infrastructure costs.
Methanol Methanol is produced from natural gas in production plants with 60% total energy efficiency. Methanol can be made with any renewable resource containing carbon such as seaweed, waste wood and garbage.
Methanol Methanol offers the greatest hope for early and broad introduction of fuel cells that will make Electric Vehicles practical within the next few years.
Methanol Whether reformed to provide hydrogen for conventional fuel cells or used directly in the latest liquid fed cells, methanol will overcome the greatest remaining obstacle to commercialization, by offering the only economical way to transport and store the hydrogen needed for fuel cells.
Methanol Methanol fuel cells will greatly reduce carbon dioxide emissions for vehicles and virtually eliminate smog and particulate pollution.
Biodiesel Biodiesel contains no petroleum, but it can be blended at any level with petroleum diesel to create a biodiesel blend. It can be used in compression-ignition (diesel) engines with little or no modifications.
Biodiesel Biodiesel can be used as a pure fuel or blended with petroleum in any percentage. B20 (a blend of 20 percent by volume biodiesel with 80 percent by volume petroleum diesel) has demonstrated significant environmental benefits.
Biodiesel Biodiesel is registered as a fuel and fuel additive with the EPA and meets clean diesel standards established by the California Air Resources Board (CARB). Neat (100 percent) biodiesel has been designated as an alternative fuel by the Department of Energy (DOE) and the US Department of Transportation (DOT).
Biodiesel The National Biodiesel Board has released the following sales volume estimates for the US: million gallons million gallons million gallons million gallons million gallons million gallons ,000 gallons
PROBLEMS ASSOCIATED WITH ALTERNATIVE FUELS
How to convert gases to gallons for tax calculations?
Will taxing model have to be modified in the future?
Difference in definitions? For example, EPA says B100 is alternative fuel, but a blend is not.
How to measure electricity, solar power, and wind power?
OPTIONS Use Department of Energy’s Gasoline Gallon Equivalent.
A gasoline gallon equivalent (GGE) is the amount of fuel required to equal the energy content of one liquid gallon of gasoline. A GGE is a way of comparing equivalent volumes of fuel based on the energy content in British thermal units (Btu).
OPTIONS Jurisdictions could assign set MPGs
Resources U.S. Department of Energy – Energy and Efficiency and Renewable Energy National Biodiesel Board
American Coalition for Ethanol American Hydrogen Association