Biodiesel Production from Pongamia Pinnata Biofeedstock

Pongamia pinnata, commonly known as karanja, is a resilient leguminous tree valued for its non-edible seed oil, which typically comprises 27–40% of seed weight. Its adaptability to marginal and degraded soils, tolerance of drought and salinity, and capacity for nitrogen fixation render it an attractive feedstock for sustainable biodiesel production. The oil is rich in monounsaturated fatty acids, particularly oleic acid, conferring oxidative stability to the resulting biodiesel. Production generally employs base-catalysed transesterification of crude oil with methanol to yield fatty acid methyl esters (FAME) and glycerol. Process optimisation studies have refined reaction conditions, catalyst concentrations and feedstock pre-treatment to enhance conversion efficiency and fuel properties in compliance with international standards. Concurrent advances in genomics and transcriptomics have elucidated the molecular pathways of lipid accumulation in developing seeds, opening avenues for breeding and biotechnological interventions to boost oil yield and tailor fatty acid profiles. Integration of Pongamia plantations into agroforestry systems further enhances carbon sequestration and land-restoration outcomes, underscoring its potential within a circular bioeconomy.

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Biodiesel Production from Pongamia Pinnata Biofeedstock publication trend

The graph below shows the total number of articles in biodiesel production from pongamia pinnata biofeedstock across all publications each year (not limited to Nature Index journals).

Technical terms

Transesterification: chemical reaction converting triglycerides and alcohol into fatty acid methyl esters and glycerol, forming the basis of biodiesel synthesis.

Triacylglycerol (TAG): storage lipid composed of three fatty acids esterified to a glycerol backbone, serving as the primary oil component in seeds.

Fatty acid methyl ester (FAME): methylated fatty acids produced by transesterification, constituting the principal constituents of biodiesel.

Oleic acid (OA): a monounsaturated C18 fatty acid predominant in Pongamia oil, valued for its oxidative stability and favourable fuel properties.

References

1. Comparative analysis of lipid and flavonoid biosynthesis between Pongamia and soybean seeds: genomic, transcriptional, and metabolic perspectives. Biotechnology for Biofuels and Bioproducts (2024).
2. A critical review of Pongamia pinnata multiple applications: From land remediation and carbon sequestration to socioeconomic benefits. Journal of Environmental Management (2022).
3. An Experimental Investigation of Karanja Biodiesel Production in Sarawak, Malaysia. Journal of Engineering (2018).
4. Temporal transcriptome profiling of developing seeds reveals a concerted gene regulation in relation to oil accumulation in Pongamia (Millettia pinnata). BMC Plant Biology (2018).