Biodiesel Production from Renewable Feedstocks
Summary
Biodiesel, comprising fatty acid alkyl esters derived from biological lipids, has emerged as a sustainable alternative to petroleum‐derived diesel. Feedstocks range from edible vegetable oils and animal fats to non‐edible and waste oils, as well as algal lipids, each offering distinct advantages in terms of availability, cost and environmental impact. Production typically relies on transesterification, in which triglycerides react with short‐chain alcohols under catalytic conditions to yield biodiesel and glycerol by‐product. Advances in heterogeneous and biochar‐based catalysts, process intensification methods such as microwave and supercritical transesterification, and integrated valorisation of residues have driven improvements in yield, energy efficiency and overall economic viability. The choice of feedstock influences fuel properties—cetane number, cold‐flow performance and oxidative stability—shaping the suitability of biodiesel for diverse climates and engine technologies. A holistic approach that couples sustainable feedstock sourcing with optimised conversion technologies is essential to scale biodiesel production, reduce greenhouse gas emissions and support circular bioeconomy goals.
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Biodiesel Production from Renewable Feedstocks publication trend
The graph below shows the total number of articles in biodiesel production from renewable feedstocks across all publications each year (not limited to Nature Index journals).
Technical terms
Transesterification: A reversible chemical reaction in which triglycerides react with an alcohol (typically methanol or ethanol) in the presence of a catalyst to form fatty acid alkyl esters (biodiesel) and glycerol.
Feedstock: Biological oil or fat source—such as vegetable oil, waste cooking oil or algal lipid—used as raw material for biodiesel production.
Catalyst: Substance that increases the rate of transesterification without being consumed; can be homogeneous (e.g., KOH) or heterogeneous (e.g., metal‐oxide supported on biochar).
Fatty Acid Methyl Ester (FAME): The primary component of biodiesel, produced when fatty acids are converted to their methyl ester derivatives.
Biochar: Carbon‐rich solid obtained by pyrolysis of biomass waste, which can serve as a heterogeneous catalyst support.
Heterogeneous Catalyst: A catalyst in a different phase (solid) to the reactants (liquid), facilitating separation and reuse.
References
- A comparative study on performance of KOH and 32%KOH/ZrO 2-7 catalysts for biodiesel via transesterification of waste Adansonia digitata oil. Green Technologies and Sustainability (2023).
- Heterogeneous carbon-based catalyst modified by alkaline earth metal oxides for biodiesel production: Parametric and kinetic study. Energy Conversion and Management X (2021).
- A Comprehensive Review on Oil Extraction and Biodiesel Production Technologies. Sustainability (2021).
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