Biolubricant Development from Renewable Resources

Biolubricants, derived from plant or animal oils and their chemically modified derivatives, present a sustainable alternative to mineral-oil-based lubricants. Driven by environmental regulations and the depletion of fossil reserves, research has focused on producing biodegradable, non-toxic lubricants with performance characteristics comparable to—or exceeding—those of petroleum products. Feedstocks range from edible oils such as soybean and rapeseed to non-edible oils like Jatropha and castor, which avoid competition with food supply. Core production routes include transesterification of fatty acid methyl esters, epoxidation of unsaturated bonds followed by ring-opening reactions and selective hydrogenation. These routes yield mono-, di- and tri-esters, polyol esters and other tailored molecules that improve viscosity index, thermal and oxidative stability and low-temperature flow. Key challenges remain in reducing production costs, enhancing long-term performance under severe service conditions and securing a consistent biomass supply. Interdisciplinary efforts bridge catalysis, reaction engineering and tribology to optimise feedstock utilisation, reaction conditions and additive packages. The global significance of these advances spans automotive, industrial and marine applications, where spill-minimisation and facile biodegradation mitigate ecological impact while supporting a circular bioeconomy.

Research from Nature Portfolio

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Biolubricant Development from Renewable Resources publication trend

The graph below shows the total number of articles in biolubricant development from renewable resources across all publications each year (not limited to Nature Index journals).

Technical terms

Transesterification: A chemical reaction that exchanges the organic group R″ of an ester with the organic group R′ of an alcohol, forming new esters and alcohols, commonly used to convert vegetable oils into fatty acid esters for biolubricants.

Epoxidation: The addition of an oxygen atom across a carbon–carbon double bond in unsaturated fatty acids to form a three-membered epoxide (oxirane) ring, enabling subsequent ring-opening reactions for lubricant basestock synthesis.

Viscosity index: A dimensionless number indicating the change of a fluid’s viscosity with temperature; higher values denote smaller viscosity changes, critical for reliable lubrication across wide temperature ranges.

Oxidative stability: The resistance of a lubricant to chemical degradation in the presence of oxygen at elevated temperatures, determining service life and deposit formation.

Tribology: The science of interacting surfaces in relative motion, encompassing friction, wear and lubrication phenomena, central to evaluating biolubricant performance under real operating conditions.

References

1. A critical review on vegetable oil-based bio-lubricants: preparation, characterization, and challenges. Environment, Development and Sustainability (2022).
2. Biolubricants from Rapeseed and Castor Oil Transesterification by Using Titanium Isopropoxide as a Catalyst: Production and Characterization. Catalysts (2020).
3. An Overview of the Biolubricant Production Process: Challenges and Future Perspectives. Processes (2020).