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NGVFORUM
PHILIPPINES
Towards
a Natural Gas powered public Transport... |
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INDUSTRY
INFORMATION
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Frequently
Asked Questions |
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1.
What is Natural Gas?
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Natural
gas is a naturally occurring gaseous petroleum accumulating
beneath the earth's crust. It is composed of hydrocarbons made
up mainly of methane which is typically about 85-99% of the
total volume. Its other constituents include inert gases such as
N2 and CO2 and non-hydrocarbon gases,
vapors and water.
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2.
What is Compressed Natural Gas?
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Compressed
Natural Gas (CNG) is used as fuel for vehicles. Because natural
gas is in its gaseous state at ambient conditions, it must be
compressed to about 16-20 MPa to achieve practical energy
density for storage on-board a vehicle.
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3.
What is Natural Gas Vehicle?
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NGVs
are vehicles that use natural gas as fuel. There are three types
of NGVs currently available. The first type requires a retrofit
conversion for liquid fueled engines to run on either bi-fuel or
dual fuel. A bi-fuel conversion allows the engine to run on
petrol or gas but not both simultaneously, while a dual fuel
conversion allows the engine to operate on either a mixture of
gas and diesel or diesel only. The second type is the conversion
of liquid fueled engines to a dedicated natural gas set-up. The
third type is the CNG Original Engine Manufactured (OEM)
vehicle.
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4.
What are the advantages of natural gas as a vehicle fuel?
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Natural
gas has inherent clean burning properties that enable NGVs to
produce lower pollutant emissions than petrol-powered vehicles.
It is a lead-free fuel that produces virtually no sulfur oxides
or particulates and up to 30% less CO2. Because it is
clean burning, natural gas reduces the required maintenance on
vehicles.
NGVs
are safer than petrol-powered vehicles. Natural gas is lighter
than air and therefore, dissipates quickly. Ignition is possible
only when gas to air ratio is between 5-15% by volume. Its
ignition temperature is much higher than the conventional fuel
(CNG-800oC, Diesel-280oC and Gasoline-500oC). CNG fuel storage
cylinders are made of thick-walled aluminum or steel and are
subjected to severe tests to withstand both crashes and heat
which are far better than the standard petrol tank of thin sheet
metal or plastic. |
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A
PUBLIC SERVICE OF EXCALIBURCNG
HAULING, STORAGE & DISTRIBUTION, INC. |