Natural gas and liquefied gas have become two “clean” alternatives to petrol and diesel. With these fuels, those
they can use both new and old vehicles A simple conversion makes it possible to obtain the DGT ECO environmental label, which will grant access during 2023 to the cities that will have to introduce the new low-emission zones (ZBE).
Compressed Natural Gas (CNG) is a gaseous fuel of fossil origin that is not derived from petroleum. The chemical composition is fundamentally based on methane, CH4, a hydrocarbon with a high hydrogen index (H/C ratio).
generate less carbon dioxide per unit of energy produced during combustion relative to other heavier hydrocarbons.
The CNG is obtained from oil fields or from independent deposits and its composition and characteristics
vary depending on the deposit it is taken from, but the physico-chemical properties are practically similar. It has a boiling point at atmospheric pressure of -161 ºC, so at room temperature it is in the gas phase. Hence the need to store it under high pressure, normally between 200 and 250 bar for use as fuel in vehicles. The relative density of CNG is less than that of air, so in case of leaks it tends to accumulate in the upper parts.
As for Liquefied Petroleum Gas (LPG), it is a fuel of fossil origin that is generally found dissolved in oil. Therefore,
is obtained during oil refining and as a by-product in Catalytic Fractional Distillation (FCC) units. The chemical composition of LPG consists of a minimum of 20% propane (C3H8) and a maximum of 80% butane (C4H10) according to the specifications included in Royal Decree 61/2006 for the use of LPG in the automotive industry. The condensation temperatures of LPG are higher than CNG, so it is cheaper to liquefy this gas compared to CNG.
As explained to this newspaper by the fuel expert
Francisco Sanz, the relative density of LPG is higher than that of air, at atmospheric pressure, so in the event of a leak it will tend to be stored in the lower parts of the site. As for the calorific value of CNG and LPG, that of CNG is about 50,200 kcal/kg while that of LPG is 46,000 kcal/kg. That is why lower powers are achieved with LPG than with CNG.
While not every vehicle can be converted to gas, the process is very simple and costs around $1,600. First of all, it should be known that not every vehicle can be converted to gas. Spanish law limits this transformation to
petrol models with Euro3 and later homologationthat is, those sold from 2001 onwards.
Like hybrid cars, LPG and CNG cars have a second tank, which is currently only used on petrol engines. We can choose to buy it already prepared or customize our vehicle
via an LPG KIT -tank, gas injectors and atomizer- at an authorized workshop, as the ITV will have to give approval later.
Please note that a car running on LPG or CNG is a traditional petrol car, which, thanks to a second tank where the LPG is stored,
allows us to choose at any time Which propulsion system do we want to use, but what happens if one of the two fails? Well, the operating system just issues a warning and makes the change automatically without noticing anything.
On the AOGLP website it is possible to find all these “Distributors” and, within each of them, their network of authorized workshops. The main advantage of this
Alternative fuels is the extensive tank network and technology. There are already more than 600 filling stations with AutoGas pumps, making it possible to cross the country from end to end using only LPG. On the CNG side, there are currently more than seventy, although they are expanding rapidly.
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Source: La Verdad
I am Ida Scott, a journalist and content author with a passion for uncovering the truth. I have been writing professionally for Today Times Live since 2020 and specialize in political news. My career began when I was just 17; I had already developed a knack for research and an eye for detail which made me stand out from my peers.
