Where Does Hydrotreated Vegetable Oil Fit Among Other Renewables?
Diesel fuels power trucks, buses, factories and ships. They make daily life easier and support the economy. However, they also release harmful gases that damage public health and the climate. Governments and industries feel pressure to cut these emissions while still meeting energy demands.
As fossil fuels decline, renewable options grow more urgent. One solution is hydrotreated vegetable oil (HVO). This renewable diesel lowers emissions and works in existing engines without requiring changes. It offers a realistic path to cleaner transport as broader renewable solutions continue to scale up.
What Is Hydrotreated Vegetable Oil?
Hydrotreated vegetable oil — or renewable diesel — is a liquid fuel derived from vegetable oils and other biomass feedstocks. It comes from catalytic hydrodeoxygenation, which removes oxygen atoms from triglycerides and fatty acids. The result is aliphatic hydrocarbons that mirror conventional diesel in performance.
Unlike biodiesel, HVO can fully replace diesel or blend with it at any ratio without requiring vehicle system modifications. This flexibility gives it an advantage over other renewables. It also expands feedstock options, as producers can rely on oils, fats and specific waste streams. That adaptability makes HVO both practical and future-oriented. Additionally, switching from petroleum diesel in favor of renewable diesel translates to 65% less carbon intensity since the latter burns more cleanly.
How HVO Compares to Other Renewable Fuels
As the demand for cleaner fuels grows, understanding the distinctions between renewable diesel options is crucial for informed energy decisions.
1. HVO vs. FAME Biodiesel
Using renewable fuels like FAME biodiesel or HVO offers a practical way to reduce emissions without replacing engines. Biodiesel can cut CO2 emissions by 65%-90%, while HVO can reduce greenhouse gases even more, making it a greener choice. Producers can make fuels from waste oils and fats. This classifies them as second-generation biofuels that do not compete with food production.
HVO has clear chemical advantages over FAME. Producers make HVO from paraffinic hydrocarbons with no sulfur or double bonds, producing less soot and fewer particles. FAME has more double bonds and oxygen, which makes it thicker, lowers energy and can cause problems in cold weather.
HVO is lighter, has lower viscosity, a higher cetane number and a simpler structure. These properties help HVO ignite faster, burn more completely and produce less smoke. Evidence shows that HVO can cut particulate matter, carbon monoxide and unburnt hydrocarbon emissions by up to 50 to 70% compared to fossil diesel.
In engine performance tests, HVO outperforms FAME in most areas. Both fuels reduce unburnt hydrocarbons, but HVO produces less smoke and allows engines to be tuned more flexibly. Producers can adjust injection timing and exhaust gas recirculation to optimize HVO combustion, cutting nitrogen oxides without increasing particulate emissions.
Unlike FAME, producers keep HVO quality consistent regardless of the feedstock and can use non-edible oils like algae, jatropha or camelina. HVO gives a cleaner, more reliable and more versatile renewable alternative to conventional diesel and FAME biodiesel.
2. HVO vs. Bioethanol
Bioethanol is the most popular biofuel, especially in the United States and Brazil. Producers often blend it with gasoline. People also use biodiesel widely, especially in Europe. Producers make it from vegetable oils and animal fats. Drivers can use bioethanol and biodiesel in standard engines by blending them with gasoline, diesel or specialized engines designed to run on pure biofuel.
HVO differs from these fuel types. Unlike bioethanol and biodiesel, HVO runs directly in diesel engines without any modifications. Bioethanol and biodiesel may need special engines or fuel mixtures. This direct compatibility simplifies the transition to HVO, since purchasing a new vehicle or altering an engine is unnecessary.
The Environmental Impact of HVO
HVO is a 100% renewable fuel source that can serve as a “drop-in” replacement for conventional diesel without needing special modifications or parts changes. It offers substantial environmental benefits, cutting fossil CO2 emissions by up to 90% and reducing nitrogen oxides and particulate matter. These reductions improve urban air quality and support cleaner transport.
Producers’ methods for making HVO also affect its impact. Hydrotreatment turns oils and fats into a high-cetane, clean-burning fuel. The process needs a lot of hydrogen, mainly from fossil sources, reducing some of HVO’s climate benefits. Using renewable hydrogen from green electrolysis could make the process fully sustainable.
The choice of feedstock for hydrogen fuel is complex, with most HVO derived from vegetable oils like palm oil. Yet, processing waste streams like used cooking oils or sludge palm oil shows promise in cost reduction, emissions reduction and support for circular economy models. The overall environmental impact depends on sustainable feedstocks and decarbonizing hydrogen inputs.
Broader energy trends in the U.S. show a rapid shift toward renewables, with more solar panels and battery storage helping stabilize the grid. Scientists have consistently emphasized the critical role of moving from fossil fuels to renewable energy sources in combating the climate crisis. In its current form, HVO is a strong step toward reducing transport emissions, but it remains a solution in transition.
Scalability and Market Adoption
The COVID-19 pandemic slowed demand as transport and industrial activity dropped, leaving global oil inventories high. Recovery in mobility and logistics is gradually increasing HVO consumption, though supply chains and price remain challenges.
Aviation is starting to use more hydrogen-powered vehicles. New plants plan to supply low-carbon jet fuel by 2025. HVO is a drop-in road and air transport fuel, helping cut emissions in many sectors.
The car industry is also driving HVO adoption. Current diesel engines and fuel networks can use it without making changes. This cuts nitrogen oxide and CO2 emissions by 80%-90%. Pure HVO leads the market because it reduces emissions more and resists bacteria better than biodiesel.
Companies like Neste in Finland and Valero Energy in the U.S. are working to increase HVO sales and improve market acceptance. Still, high costs and competition from biodiesel slow adoption, especially since engines can run on bioethanol and biodiesel when blended with gasoline or diesel.
HVO’s Place in the Renewable Revolution
HVO is a cleaner fuel for transport. It helps cut greenhouse gases and air pollution, and it works with today’s diesel systems. Some challenges remain, like high cost, fuel sources and hydrogen use. Using waste oils and non-food crops could help. HVO shows how new technology and sustainable ideas can work together.
HVO offers a useful bridge between diesel and the future, which will be helpful as the world moves toward green energy. As adoption grows, policies and investments will play a key role in making HVO more accessible. For now, it is both a practical choice for consumers and a stepping stone toward a low-carbon future.
