Advanced biofuels have burst into the energy debate as an essential alternative for reducing the carbon footprint of transportation without the need to modify existing infrastructure or vehicles. These fuels, produced from non-food organic waste—such as pruning, forest residues, used oils, or even algae—have the advantage of not interfering with the human food chain or aggravating land-use change, two recurring criticisms of conventional biofuels.
The energy transition has become a multidimensional process Which, according to experts and entities such as the Repsol Foundation and the Carlos III University of Madrid, will only be possible if different technological solutions are used, including the massive incorporation of renewable fuels. These fuels can be rapidly integrated into the current mobility and energy system, using existing logistics infrastructure, from service stations to pipelines, without requiring additional investment or time for industrial adaptations.
One of the great advantages of Advanced biofuels lies in their versatility and immediate decarbonization capacity.. They can be used without modification in current combustion engines, both in the automotive and maritime and aeronautical sectors, thus facilitating a significant reduction in emissions. Furthermore, Its production promotes the circular economy, valorizing organic waste and avoiding its accumulation or incineration, which boosts the local economy and the reindustrialization of rural or declining areas.
The technological routes to obtaining these fuels are diverse: from hydrotreatment of used oils, used in products such as renewable diesel, fermentation to generate bioethanol, anaerobic digestion (which produces biogas and biomethane), pyrolysis, and gasification of lignocellulosic biomass. Each process transforms available waste into clean, high-value-added energy to the maximum extent possible.
Spain is positioned as one of the countries with the greatest leadership capacity in advanced biofuels due to a combination of differentiating factors. These include the abundance of agricultural and forestry waste, the industrial fabric, and a network of refineries prepared for conversion into multi-energy centers. Investments in R&D and the acquisition of European funds strengthen Spain's position as a European leader in the bioeconomy and biocircularity.
European momentum and pioneering mobility projects
The European Union recognizes the strategic role of these fuels, and its RED III directive requires that by 2030 at least 5,5% of fuels used in transportation be advanced biofuels or non-biological renewables. Experiences such as the Tour de Europe, where vehicles traveled thousands of kilometers using a majority renewable fuel mix, have demonstrated that the technology is already available and economically viable, without affecting logistics or vehicle operations.
At the national level, the National Integrated Energy and Climate Plan sets an even more ambitious goal: achieving 28% renewable energy in transportation by 2030. The Ministry for Ecological Transition, in turn, has implemented regulatory and fiscal measures to limit the use of food crops and prioritize waste in biofuel production, strengthening environmental sustainability and promoting innovative energy uses such as biomethane.
The commitment to these fuels is also accompanied by a important regulatory and tax updateSome governments have increased minimum purchase prices for biofuels such as biodiesel and bioethanol, adjusting the amounts to maintain competitiveness and reflect production costs. Furthermore, Strict payment deadlines have been set for these products, and in sectors such as transport, the impact on final costs for consumers and businesses is being debated.
Actions on the ground are not limited to land transport. Companies such as Armas Trasmediterránea have begun using advanced 2G biofuels on maritime routes, especially in the Canary Islands, as part of plans aimed at reducing emissions and improving fleet efficiency. These initiatives are aligned with strategic alliances with specialized companies and certify the commitment to European guidelines on port and maritime sustainability.
Circular economy, innovation and technological development
One of the unique advantages of advanced biofuels is their contribution to the circular economy. Transforming agricultural, forestry, urban waste, and even animal fats into energy It allows us to reduce the impacts derived from waste management and, at the same time, strengthen the local economy thanks to the creation of new value chains associated with logistics, processing, and distribution.
Energy companies, such as Repsol, have committed to promoting large renewable fuel production plants, such as the one recently opened in Cartagena or the upcoming one in Puertollano, where they process all types of waste. This flexible approach, which combines lipid, biological, thermochemical, and e-fuel technologies, seeks to maximize energy efficiency and promote circularity, a key aspect for the reindustrialization of transition territories.
At the same time, research and innovation play a fundamental role. Technology platforms and universities are working closely to secure European funding and promote pilot projects that will scale production and, in the long term, integrate biofuels into the main sectors of the national economy. Experts agree that, although electrification will be essential for urban uses, biofuels are essential for decarbonizing sectors such as heavy transport, aviation, and maritime.
Another relevant aspect is the economic impact of these fuels. According to some estimates, with intensive use of domestic raw materials such as agricultural and forestry waste, Up to 58% of fossil fuel demand could be replaced and emissions significantly reduced, while contributing to the revitalization of the rural economy.
The development of these fuels is also supported by strict regulations requiring sustainability certification and traceability to guarantee their renewable origin, a prerequisite for accessing both subsidies and markets and meeting international standards.
The technological maturity achieved and the availability of the first operational industrial facilities demonstrate that the advanced biofuels sector can offer immediate and scalable solutions. Major transportation companies, vehicle manufacturers, and logistics operators have already integrated these fuels into their fleets, with tests confirming the reduction in emissions and full compatibility with current equipment.
The energy sector faces significant challenges, such as tax adaptation, the need for investment, and the establishment of clear regulatory frameworks. However, the conditions for widespread adoption in Spain and Europe are favorable; accumulated experience and a commitment to technological diversification consolidate these fuels as a key element in the transition toward low-carbon mobility and industry.
Looking to the future, transportation will not rely exclusively on electrification, but rather will be a combination of options tailored to each sector. For the decarbonization of hard-to-electrify segments, such as aviation or long-haul road and sea transport, advanced biofuels offer a readily available alternative. Their ability to reduce emissions, utilize waste, and revitalize territories positions them as a crucial tool in the energy transition.