Denis Miroshnichenko, a researcher at the Department of Oil, Gas and Solid Fuel Refining Technologies at Kharkiv Polytechnic Institute in Ukraine, has uncovered a promising pathway to turn a major industrial waste stream into a viable boiler fuel. His team’s work focuses on soapstock—a byproduct of sunflower oil refining that typically accounts for up to 90% of the waste generated during neutralization. “This isn’t just about waste reduction,” Miroshnichenko explains. “It’s about transforming a liability into an asset with real energy value.”
Soapstock, a viscous residue formed when fatty acids react with alkali during oil processing, has historically been difficult to manage. Often costly to dispose of, it’s been treated as a burden by producers like PJSC “Zaporizhzhya Oil and Fat Plant,” where Miroshnichenko sourced his raw material. But through a series of controlled acidification, washing, and purification steps, his team developed a low-sulfur fuel component that meets most standards for boiler fuels, including those set by DSTU 4058-2001 (Ukraine) and PN-C-96024:2020 (Poland), with the exception of heat of combustion. Most notably, the final product aligns with ISO 8217:2024, a stringent marine fuel standard, and delivers nearly double the heat output of similar fuels derived from other oil and fat industry wastes.
The implications for the energy sector are significant. With sulfur content as low as 0.12 wt%, this fuel could help industries meet tightening emissions regulations without expensive desulfurization retrofits. The composition—75.33% carbon, 11.64% hydrogen, and 12.00% oxygen—suggests a stable, energy-dense material that could be blended into existing boiler systems with minimal modifications. “We’re not just creating a niche product,” Miroshnichenko notes. “We’re offering a scalable solution that can integrate into refineries and power plants looking to reduce waste and cut fuel costs.”
Published in the journal *Recycling* (Ukrainian: *Вторинні ресурси*), the study highlights a circular economy model that could be replicated across the global vegetable oil industry. As sunflower oil production continues to rise—especially in Europe and Ukraine—so too does the volume of soapstock. Instead of paying for disposal or incurring penalties for high-sulfur content, producers could now view this waste as a secondary raw material for energy generation.
Looking ahead, Miroshnichenko’s research points to broader opportunities in waste valorization within the fats and oils sector. If similar processes can be optimized for other vegetable oils and animal fats, the energy sector could see a new class of low-cost, low-impact boiler fuels entering the market. The next step, he suggests, is pilot-scale testing in industrial boilers to validate performance under real-world conditions.
For energy producers seeking sustainable alternatives, this work offers more than just a technical breakthrough—it presents a commercial opportunity. By turning a 9.95 wt% waste stream into a usable fuel, refineries may finally close the loop on one of their most persistent environmental and economic challenges.