Compressed Natural Gas Motor Vehicle
Fuels
This
page last reviewed on February 20, 2018
Background
Compressed Natural Gas (CNG) is a gasoline and diesel fuel alternative
consisting primarily of methane. The
gas is associated with other fossil fuels (coal or oil) and is created
by methanogenic organisms in landfills. The gas is extracted from the
source and compressed to a high pressure where it can be stored in a
vehicle fuel tank.
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Recent Activities
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July 2014 |
Work
Continues on Revisiting the
CNG/LNG Specifications
Staff is currently examining two
ongoing studies. The first is the
Effect of
Natural Gas Fuel
Composition on Vehicles study,
which is being
conducted by the University
of California at Riverside. This study is sponsored by
ARB and the California Energy Commission (CEC) to review the emission
effects
that lower Methane Number and higher Wobbe Index gas supplies may have
on light
and heavy-duty engines. The second is the Tool for EMission Processing of LNG Expansion Scenarios
(TEMPLES) study, which
the University of California at Irvine (UCI) is conducting. This study
is a predictive model used to estimate changes in GHG and criteria
pollutant emissions from mobile and stationary sources. We anticipate
that these
studies, along with additional information we are gathering in
collaboration
with the gas companies, air districts, and other stakeholders, will
enable us
to better evaluate alternatives to the current set of CNG motor vehicle
fuel specifications
in California.
We intend to schedule public workshops in 2015 to
discuss
regulatory concepts and other proposals based on these developments;
the goal
would be to propose a rulemaking for our Board’s consideration in late
2015.
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Converting Vehicles to Compressed Natural Gas Fuel
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Individuals interested in converting gasoline or
diesel vehicles to operate on an alternative fuel must ensure that the
alternative fuel retrofit systems have been certified by ARB. For more
information on converting a vehicle to run on compressed natural gas
fuel, and for the list of certified retrofit systems for various
vehicle makes and models, please visit ARB's web page that
covers Certification
of Alternative Fuel Retrofit Systems.
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Related Links
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Contact Us
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- For more information about the Compressed Natural Gas
Motor Vehicle Fuels,
please contact Linda Lee at (916) 322-1521.
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