Alternative Fuels for Fleets: LNG/Bio-LNG and CNG/Bio-CNG
The growing need to reduce greenhouse gas emissions and meet sustainability targets has led many companies to seek alternatives to traditional fossil fuels. Among the various solutions available for road transport, LNG/Bio-LNG (Liquefied Natural Gas) and CNG/Bio-CNG (Compressed Natural Gas) stand out as technologies that significantly reduce the environmental impact of transport operations while maintaining high levels of operational efficiency.
What are LNG and CNG?
LNG (Liquefied Natural Gas) is natural gas that has been cooled to approximately -160°C, converting it into a liquid state. This process drastically reduces its volume, allowing a much larger amount of energy to be stored in relatively compact tanks. As a result, LNG-powered vehicles can achieve extended driving ranges, making them particularly suitable for long-distance transport.
CNG (Compressed Natural Gas), on the other hand, is natural gas stored in its gaseous state under high pressure, typically between 200 and 250 bar. Although it has a lower energy density than LNG, CNG/Bio-CNG offer important safety advantages due to the gas being lighter than air, allowing it to disperse more easily in the event of a leak. These characteristics make them particularly suitable for short- and medium-distance operations.
What about their renewable alternatives: Bio-LNG and Bio-CNG?
Bio-LNG and Bio-CNG are the liquefied and compressed forms of biomethane, respectively. Biomethane has properties that are virtually identical to those of conventional natural gas, meaning it can be used in the same vehicles and refuelling infrastructure without requiring any modifications.
The main advantage of these renewable alternatives lies in their ability to reduce the carbon footprint. Depending on the feedstock used and the production process, Bio-LNG and Bio-CNG can deliver significant reductions in CO₂eq emissions throughout the fuel’s life cycle, making a valuable contribution to companies’ decarbonisation goals.
Key Differences Between LNG/Bio-LNG and CNG/Bio-CNG
Although they are based on the same energy source, these solutions differ in several operational aspects. LNG/Bio-LNG have a higher energy density, enabling vehicles to carry more fuel and achieve longer driving ranges. This makes them particularly suitable for heavy-duty vehicles operating over long distances and under demanding conditions. They are especially relevant for companies operating their own long-haul fleets or working with third-party transport providers. Furthermore, the use of Bio-LNG enables a substantial reduction in carbon emissions without compromising operational efficiency or vehicle payload capacity.
CNG/Bio-CNG, in contrast, require high-pressure storage systems and dedicated refuelling infrastructure to keep the gas compressed. Despite these requirements, they represent a strategic solution for urban bus fleets and waste collection vehicles, where their operational efficiency makes them particularly well suited to frequent stop-and-start routes.
Which Is the Best Choice?
The choice between these two fuels depends primarily on the operational profile of the fleet. While CNG/Bio-CNG provide an efficient solution for urban operations and local distribution services, LNG/Bio-LNG are the preferred option for long-haul heavy-duty transport thanks to their greater driving range. In both cases, the renewable alternatives provide a practical opportunity to accelerate the decarbonisation of the heavy-duty transport sector by combining environmental sustainability, operational efficiency and economic competitiveness.
G3 | Go Green Gas is a company dedicated to the production and supply of biomethane for use in the heavy-duty transport sector. Its activities contribute to the decarbonisation of road transport by providing renewable energy solutions that reduce CO₂eq emissions and support the energy transition of commercial vehicle fleets.
