SOURCE CHARACTERISATION OF CO₂ EMISSIONS IN PETROLEUM REFINERIES IN PORT HARCOURT: RELEVANCE FOR CARBON CAPTURE AND STORAGE
DOI:
https://doi.org/10.5281/zenodo.19182956Keywords:
Port Harcourt Refinery, CO₂ emissions, Carbon capture and storage, Fluid catalytic cracking, Nigeria, CCS feasibilityAbstract
This study assessed the sources, operational drivers, and feasibility of implementing carbon capture and storage (CCS) at the refinery. Data were collected from 18 staff members, including engineers, environmental officers, operations managers, and maintenance personnel, through structured questionnaires and semi-structured interviews, supplemented by secondary reports. Respondents estimated annual CO₂ emissions between 1–5 million tonnes, with the fluid catalytic cracking (FCC) unit (29.8%), fired heaters/boilers (27.2%), and steam methane reforming (SMR, 19.1%) identified as the primary contributors. Reported CO₂ concentrations in flue gases ranged from 5–15%, with FCC and SMR units exhibiting 8–12% and 12–15%, respectively, indicating suitability for post-combustion capture technologies. Energy consumption was concentrated in FCC (120–150 MW/day), boilers (80–100 MW/day), and SMR units (60–70 MW/day), further highlighting their role as major emission drivers. Capacity utilization post-2024 rehabilitation was 53.3% for the New Plant and 41.7% for the Old Plant, reflecting underutilization and operational instability. While 44% of staff demonstrated familiarity with CCS and identified existing natural gas pipelines and compression infrastructure as adaptable for CO₂ transport, 56% had limited or no knowledge, indicating gaps in technical readiness. The study concludes that targeted CCS implementation at high-emission units is technically feasible, but successful deployment requires enhanced monitoring systems, workforce training, and infrastructural assessment. These findings provide critical insights for policymakers and refinery management in Nigeria and contribute to strategies for emissions reduction in oil and gas operations in emerging economies.
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References
Adebayo, T. S., Awosusi, A. A., Kirikkaleli, D., & Akinsola, G. D. (2022). Pathways toward achieving net-zero emissions in Nigeria: The role of energy transition and policy reforms. Environmental Science and Pollution Research, 29(37), 55837–55852. https://doi.org/10.1007/s11356-022-20176-1
Ana, G. R. E. E., Shendell, D. G., Odeshi, T. A., & Sridhar, M. K. C. (2019). Identification and health risk assessment of ambient air pollutants in oil-producing communities of the Niger Delta, Nigeria. Environmental Pollution, 253, 1069–1081. https://doi.org/10.1016/j.envpol.2019.07.025
Betiku, E., & Bassey, D. E. (2022). Techno-economic assessment of carbon capture from industrial emissions: A review. Journal of CO₂ Utilization, 62, 102125. https://doi.org/10.1016/j.jcou.2022.102125
British Geological Survey. (2020). CO₂ storage atlas of the Niger Delta: Geological storage potential and characterisation. BGS Publications.
Creswell, J. W., & Plano Clark, V. L. (2018). Designing and conducting mixed methods research (3rd ed.). Sage Publications.
Dike, V. E. (2020). Carbon capture and storage pathways for Nigeria’s oil and gas industry. Energy Policy and Planning, 8(2), 45–58.
Ede, P. N., & Edokpa, D. O. (2017). Regional air quality in the Niger Delta: Air pollution episodes and health implications in Port Harcourt, Nigeria. Journal of Environmental Protection, 8(11), 1318–1334. https://doi.org/10.4236/jep.2017.811081
European Commission. (2025). Industrial emissions and carbon management report 2025. Publications Office of the European Union.
Fasihi, M., Golzar, A., & Wachsmann, U. (2023). Carbon capture and utilisation in industrial sectors: Technology status and recent developments. Journal of CO₂ Utilization, 57, 101376. https://doi.org/10.1016/j.jcou.2023.101376
Fowler, F. J. (2014). Survey research methods (5th ed.). Sage Publications.
International Energy Agency. (2023). Net zero roadmap for industrial sectors. IEA Publishing.
International Energy Agency. (2024). Global refinery emissions report 2024. IEA Publishing.
Intergovernmental Panel on Climate Change. (2023). AR6 synthesis report: Climate change 2023. IPCC.
Kiani, B., Rezaei, H., & Ahmadi, M. (2025). Characterising refinery flue gas compositions and implications for carbon capture. Fuel Processing Technology, 251, 108876. https://doi.org/10.1016/j.fuproc.2024.108876
Kvale, S., & Brinkmann, S. (2015). InterViews: Learning the craft of qualitative research interviewing (3rd ed.). Sage Publications.
Leung, D. Y. C., Caramanna, G., & Maroto-Valer, M. M. (2014). An overview of current status of carbon dioxide capture and storage technologies. Renewable and Sustainable Energy Reviews, 39, 426–443. https://doi.org/10.1016/j.rser.2014.07.093
Leung, D. Y. C., Caramanna, G., & Maroto-Valer, M. M. (2024). A review of CO₂ capture technologies with reference to applications in refineries. Renewable and Sustainable Energy Reviews, 173, 113546. https://doi.org/10.1016/j.rser.2023.113546
Nigerian CO₂ Storage Atlas. (2022). Geological storage potential in the Niger Delta. Nigerian Geological Survey Agency.
Nigerian National Petroleum Corporation. (2021). Port Harcourt Refinery annual report. NNPC Press.
Nwankwo, C. N., Odiase, O. I., & Ihensekhien, O. A. (2021). Ambient air quality and cardiopulmonary health risks in Port Harcourt metropolis, Nigeria. Atmospheric Pollution Research, 12(4), 101065. https://doi.org/10.1016/j.apr.2021.101065
Ogunleye, E. K., Owolabi, O., Sanni, M., & Lawanson, T. (2023). Nigeria’s 2060 net-zero target: Energy system implications and governance challenges. Energy Policy, 176, 113516. https://doi.org/10.1016/j.enpol.2023.113516
Okafor, E. C., & Okeke, J. J. (2019). Operational efficiency and emission characteristics of Nigerian petroleum refineries. Energy Reports, 5, 1204–1215. https://doi.org/10.1016/j.egyr.2019.08.085
Oyekan, J. O., & Adewumi, J. R. (2020). Refinery emissions and mitigation strategies in Nigeria. International Journal of Energy and Environmental Engineering, 11(4), 539–550. https://doi.org/10.1007/s40095-020-00379-7
Rahman, M. M., Hasan, M. M., & Hossain, M. S. (2025). Ageing refinery infrastructure and emission trends in emerging markets. Journal of Cleaner Production, 390, 136542. https://doi.org/10.1016/j.jclepro.2025.136542
Rao, A. B., Rubin, E. S., & Versteeg, P. (2023). Continuous emissions monitoring systems for industrial decarbonisation: Challenges and solutions. Environmental Monitoring and Assessment, 195(4), 118. https://doi.org/10.1007/s10661-023-11035-0
Rivas-Gómez, Y., & González-Garay, A. (2022). Analysis of CO₂ emission intensity in combined heat and power systems. Journal of Energy Engineering, 148(6), 04022068. https://doi.org/10.1061/(ASCE)EY.1943-7897.0000860
Singh, R., Patel, S., & Gupta, A. (2024). Refinery operational inefficiencies and carbon footprint: A comparative study. Journal of Cleaner Production, 410, 136983. https://doi.org/10.1016/j.jclepro.2024.136983
United Nations Environment Programme. (2025). Industrial emissions and climate policy integration: Global assessment report. UNEP Publishing.
You, Z., & Brook, R. (2024). Operational stability and carbon capture integration: Lessons for industrial applications. Applied Energy, 326, 120202. https://doi.org/10.1016/j.apenergy.2022.120202
Zhang, X., Chen, Y., & Li, W. (2025). Economic viability of CCS implementation in underutilised industrial facilities. Energy Policy, 171, 113450. https://doi.org/10.1016/j.enpol.2024.113450
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