Chinedu G. Nnaji discusses his groundbreaking research on using natural waste materials for crude oil processing. His paper, “Evaluation of a naturally-derived waste brown oil extract for demulsification of crude oil emulsion,” offers an environmentally friendly alternative to conventional chemical demulsifiers. Excerpts.

Could you share a bit about your background?

Nnaji: Thank you for having me. I’ve always been passionate about science and engineering. In high school, I was fortunate to graduate as the best science student. I carried that momentum into university, where I earned a first-class degree in Petroleum Engineering. Currently, I work as a drilling engineer, which gives me practical industry insights that inform my research.

Your research on using waste brown oil from rice husks as a demulsifier has generated significant interest. Could you briefly explain demulsification and why it’s important in oil production?

Nnaji: Certainly. Demulsification is the process of separating water from crude oil. During oil production, especially in mature fields, water and oil mix to form stable emulsions. These water-in-oil emulsions create significant challenges in production, transportation, and refining processes. Efficiently removing this water is critical for maintaining oil quality and reducing processing costs.

What prompted you to embark on this particular research direction using rice husks?

Nnaji: As a drilling engineer, I’ve witnessed firsthand the challenges posed by emulsions in field operations. Conventional chemical demulsifiers, while effective, often raise both economic and environmental concerns.

My academic background in petroleum engineering gave me the theoretical foundation, while my field experience highlighted the practical need for better solutions. Rice husks are abundant agricultural waste in Nigeria and many other countries. I saw an opportunity to repurpose this waste material into something valuable for the oil industry.

I was particularly motivated by the concept of creating value from waste and developing solutions that align with sustainable practices in the petroleum industry. This research represents a bridge between my academic interests and practical field challenges.

Your paper shows impressive results. Could you highlight some of the key findings?

Nnaji: Certainly. What was particularly exciting was that our bio-demulsifier outperformed conventional chemical demulsifiers under all the experimental conditions we tested. At optimal conditions – using 5 mL of the extract at 70°C with a separation time of 60 minutes – we achieved a water separation efficiency of 85.6% compared to 80.2% for the chemical demulsifier.

Our GC-MS analysis revealed that the main components of the extract are octadecanoic acid and n-hexaneoic acid, which proved effective at breaking water-in-oil emulsions. We also determined that the combined effect of temperature and demulsifier volume had the most significant influence on the demulsification process.

What impact do you see this research having on the petroleum industry?

Nnaji: The impact could be substantial on multiple fronts. From an economic perspective, this offers oil producers a cost-effective alternative to expensive chemical demulsifiers. The raw material – rice husks – is inexpensive and widely available as agricultural waste.

Environmentally, this represents a shift toward greener processes in oil production. The demulsifier is derived from natural sources and poses fewer environmental risks compared to conventional chemicals.

For countries like Nigeria with both agricultural and petroleum sectors, this creates a valuable synergy between industries. Agricultural waste becomes a value-added product for the petroleum sector.

As a drilling engineer, I see practical applications in field operations where water-in-oil emulsions frequently cause production challenges. Having an effective, environmentally friendly solution could significantly improve operational efficiency.

Are there challenges to implementing this technology on a larger scale?

Nnaji: As with any new technology, scaling presents some challenges. We need to establish efficient extraction processes that can handle large volumes of rice husks. There’s also the need for field trials under various operating conditions and with different crude oil types to establish broader applicability.

My experience as a drilling engineer has taught me that bridging the gap between laboratory success and field implementation requires addressing many practical considerations. However, the simplicity of the extraction process and the ready availability of the raw material make these challenges quite manageable.

What’s next for this line of research?

Nnaji: We’re exploring several exciting directions. We’re investigating other agricultural wastes that might yield effective demulsifiers. We’re also working on optimizing the extraction process to improve yield and efficiency.

Another important avenue is testing the bio-demulsifier with different types of crude oils from various fields, as emulsion characteristics can vary significantly. I’m particularly interested in field testing this solution under real operational conditions to validate its performance beyond the laboratory.

What would you say to those who might be skeptical about using bio-based solutions in a traditionally chemical-heavy industry?

Nnaji : I’d say look at the data. Our research shows that this bio-based solution isn’t just environmentally preferable – it’s actually more effective. The petroleum industry has always been driven by innovation and efficiency. This is simply the next step in that evolution.

The challenges we face today – economic pressures, environmental regulations, and sustainability goals – require new thinking. Bio-based solutions represent an untapped frontier with enormous potential. This particular application demonstrates that we can achieve better performance while simultaneously addressing environmental concerns.

I believe the future of petroleum engineering lies in this kind of biomimetic approach – learning from and working with nature rather than against it.

What would you say to young scientists and engineers who might be inspired by your work?

Nnaji: I would encourage them to look for solutions at the intersection of disciplines. This research combined petroleum engineering with agricultural waste management to solve an industry problem. Some of the most innovative solutions come from these interdisciplinary approaches.

Also, don’t underestimate the value of your practical experiences. My work as a drilling engineer gave me insights that shaped this research in meaningful ways. Theory and practice together can lead to truly impactful innovations.

Finally, consider sustainability in all your work. Finding solutions that are both technically superior and environmentally responsible is not just good ethics—it’s good engineering.

I hope it inspires others to look at waste materials as potential resources and to seek sustainable solutions within the petroleum industry.