As the automotive industry continues its transition towards low-carbon mobility, different applications and markets will end up following distinct technology paths.
Rather than electrification, this means many regions and industries will find a best-fit solution via an alternative fuel technology – including hydrogen, biofuels, and e-fuels. One alt-fuel that’s seeing considerable interest in markets such as China, is methanol.
Methanol is a liquid fuel that has been used in industrial applications for decades. It can be made from different sources, including natural gas, coal, and via the fermentation of plant matter – along with also being producible as an e-fuel by using a combination of electricity, hydrogen and captured CO₂.
Compared to the most popular alt-fuel, ethanol, methanol is a simpler chemical: methanol is made up of one carbon atom, three hydrogen atoms, and one oxygen atom; on the other hand, ethanol is made up of two carbon atoms, five hydrogen atoms, and one oxygen atom. This means that it is easier to synthesize methanol, and it is often more affordable than ethanol – with it being generally uneconomical to produce ethanol from coal or natural gas.
Similar to ethanol, methanol has a high octane rating, meaning it can withstand higher compression before igniting. This helps prevent unwanted combustion, known as engine knock, allowing for more efficient and reliable engine operation. It can also be blended with gasoline at different concentrations, from low-level blends through to higher-concentration fuels such as M85 (85% methanol and 15% gasoline) and M100 (pure methanol) in compatible vehicles.
This flexibility allows methanol to complement existing fuel infrastructure, unlike other alt fuel systems like hydrogen, offering a pathway for markets to reduce emissions without requiring a complete replacement of their current transport systems.
China is currently the largest adopter of methanol as a transportation fuel, with hundreds of thousands of taxis, trucks and buses operating on methanol blends. This demonstrates how regional conditions, fuel availability and existing infrastructure can influence which alternative fuel solutions are most suitable.
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Like all alternative fuels, methanol also presents challenges. Its energy density is lower than gasoline and diesel, meaning vehicles and vessels may require larger fuel storage capacity to meet the same range. It is also more corrosive than conventional fuels, requiring fuel systems and components that are designed to handle its properties.
The availability and cost of renewable methanol production will also determine how quickly it can scale. As with other low-carbon fuels, its environmental benefits depend on how it is produced and the energy sources used during manufacturing.
Taxis, trucks and buses are among the most common vehicles to operate on methanol blends
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Methanol demonstrates that we need multiple fuel or technology options to complement and benefit different applications and regions. Multiple approaches are needed depending on what the resources, infrastructure and transport requirements are for different areas.
For Horse Powertrain and other powertrain manufacturers, methanol represents an opportunity to adapt and optimize combustion technology for a lower-carbon future. By continuing to innovate across multiple powertrain architectures and fuel types, the industry can support a more flexible and sustainable approach to global mobility.
To read more about Horse Powertrain’s solutions, click here.