A Comprehensive Review of Inorganic Refrigerants in LNG Liquefaction Cycles: Thermodynamic Performance and Environmental Impact

Chukwuka Dennis Offodum; Akuma Oji

doi:10.61424/ijans.v3i1.258

Authors

Chukwuka Dennis Offodum Centre for Gas, Refining and Petrochemical Engineering, University of Port Harcourt – Nigeria
Akuma Oji Centre for Gas, Refining and Petrochemical Engineering. University of Port Harcourt – Nigeria

DOI:

https://doi.org/10.61424/ijans.v3i1.258

Keywords:

Inorganic refrigerants, Liquefaction cycles, Thermodynamic performance, Environmental impact, Energy efficiency

Abstract

As the demand for Liquefied Natural Gas (LNG) continues to rise, the need for efficient and environmentally friendly refrigeration technologies has become more critical. This study presents a comprehensive review of inorganic refrigerants used in Liquefied Natural Gas (LNG) liquefaction cycles, concentrating on their thermodynamic performance and environmental effects. Using a thorough literature study, important refrigerants such as nitrogen, argon, krypton, xenon, and ammonia were examined in terms of efficiency, energy consumption, and sustainability. The findings show that inorganic refrigerants can improve energy efficiency by lowering power consumption and increasing exergy performance. Nitrogen was found to require the least amount of energy, whereas ammonia significantly increased the coefficient of performance (COP) in mixed refrigerant applications. Krypton and xenon both demonstrated great exergy efficiency, making them attractive candidates for future LNG operations. While these refrigerants have a lesser environmental effect than standard hydrocarbons, more advances are needed. The study recommends optimizing hybrid refrigerant systems, including renewable energy, and improving safety measures. Advancing these strategies can make LNG production more sustainable, reducing its carbon footprint while maintaining efficiency.

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References

Arshad, K. et al. (2024) ‘Air pollution and climate change as grand challenges to sustainability’, Science of The Total Environment, p. 172370.

Azam, A. et al. (2021) ‘Analyzing the effect of natural gas, nuclear energy and renewable energy on GDP and carbon emissions: A multi-variate panel data analysis’, Energy, 219, p. 119592.

Bhatti, S.S. et al. (2024) ‘Environment-Friendly Refrigerants for Sustainable Refrigeration and Air Conditioning: A Review’, Current World Environment, 18, pp. 933–947. Available at: https://doi.org/10.12944/CWE.18.3.03.

Blose, S.C. et al. (2023) ‘Improved correlation for predicting heat transfer coefficients during condensation inside smooth horizontal tubes’, International Journal of Low-Carbon Technologies, 18, pp. 750–763.

Chan, W.L., Tam, I.C. and Dev, A.K. (2022) ‘Case Studies of Single Nitrogen Expander Liquefaction for FLNG’, Energy, 2004, p. 2965.

Chenchen, W. et al. (no date) ‘Integration of Nitrogen Refrigeration in an LNG-Coupled Liquid Air Energy Storage System: Performance Optimization and Economic Analysis’, Available at SSRN 5056395 [Preprint]. Available at: https://papers.ssrn.com/sol3/papers.cfm?abstract_id=5056395 (Accessed: 18 March 2025).

He, T., Lin, W. and Du, Z. (2022) ‘Design and analysis of cascade liquefaction processes for coproducing liquid ethane and LNG’, International Journal of Energy Research, 46(7), pp. 9794–9811. Available at: https://doi.org/10.1002/er.7852.

Liu, L. et al. (2024) ‘Design and optimization of liquid nitrogen precooling BOG re-liquefaction process for LNG ships’, International Journal of Refrigeration, 159, pp. 134–146. Available at: https://doi.org/10.1016/j.ijrefrig.2024.01.003.

Majeed, K. et al. (2020) ‘Shuffled complex evolution-based performance enhancement and analysis of cascade liquefaction process for large-scale LNG production’, Energies, 13(10), p. 2511.

Mazyan, W.I. et al. (2020) ‘Increasing the COP of a refrigeration cycle in natural gas liquefaction process using refrigerant blends of Propane-NH3, Propane-SO2 and Propane-CO2’, Heliyon, 6(8), p. e04750. Available at: https://doi.org/10.1016/j.heliyon.2020.e04750.

Mehrpooya, M., Sadaghiani, M.S. and Hedayat, N. (2020) ‘A novel integrated hydrogen and natural gas liquefaction process using two multistage mixed refrigerant refrigeration systems’, International Journal of Energy Research, 44(3), pp. 1636–1653. Available at: https://doi.org/10.1002/er.4978.

Natural gas and the environment - U.S. Energy Information Administration (EIA) (no date). Available at: https://www.eia.gov/energyexplained/natural-gas/natural-gas-and-the-environment.php (Accessed: 19 March 2025).

Oshodin, T.E., Bolaji, B.O. and Olorunfemi, B.J. (2023) ‘A Review of Mixture of Carbon-Dioxide and Liquefied Petroleum Gas as Refrigerants in Vapour Compression Refrigeration System’. Available at: http://journal.engineering.fuoye.edu.ng/index.php/engineer/article/view/945 (Accessed: 10 March 2025).

Ozueh, Tobechi F, Ajienka, J.A. and Joel, O.F. (no date) ‘A Comparative Study of Inorganic Refrigerants for the Liquefaction of Natural Gas’.

Ozueh, Tobechi F., Ajienka, J.A. and Joel, O.F. (no date) ‘A Comparative Study of Inorganic Refrigerants for the Liquefaction of Natural Gas’. Available at: https://www.academia.edu/download/89006522/M080792104.pdf (Accessed: 17 March 2025).

Peter Simpa et al. (2024) ‘Sustainability and environmental impact in the LNG value chain: Current trends and future opportunities’, World Journal of Advanced Research and Reviews, 22(2), pp. 581–601. Available at: https://doi.org/10.30574/wjarr.2024.22.2.1399.

Qyyum, M.A., Qadeer, K., Ahmad, A. and Lee, M. (2020) ‘Gas–liquid dual-expander natural gas liquefaction process with confirmation of biogeography-based energy and cost savings’, Applied Thermal Engineering, 166(114643). Available at: https://doi.org/10.1016/j.applthermaleng.2019.114643.

Qyyum, M.A., Qadeer, K., Ahmad, A., Ahmed, F., et al. (2020) ‘Two-phase expander refrigeration cycles with ethane–nitrogen: A cost-efficient alternative LNG processes for offshore applications’, Journal of Cleaner Production, 248(119189). Available at: https://doi.org/10.1016/j.jclepro.2019.119189.

Savitha, D.C. et al. (2022) ‘Refrigerants for sustainable environment–a literature review’, International Journal of Sustainable Energy, 41(3), pp. 235–256.

Soujoudi, R. and Manteufel, R. (2021) ‘Thermodynamic, Economic and Environmental Analyses of Ammonia-Based Mixed Refrigerant for Liquefied Natural Gas Pre-Cooling Cycle’, Processes, 9, p. 1298. Available at: https://doi.org/10.3390/pr9081298.

Tak, K. et al. (2023) ‘Comparison of mixed refrigerant cycles for natural gas liquefaction: From single mixed refrigerant to mixed fluid cascade processes’, Energy, 272, p. 127051.

Wang, J. et al. (2022) ‘Volatility of clean energy and natural gas, uncertainty indices, and global economic conditions’, Energy Economics, 108, p. 105904.

Wang, L., He, L. and He, Y. (2024) ‘Review on Absorption Refrigeration Technology and Its Potential in Energy-Saving and Carbon Emission Reduction in Natural Gas and Hydrogen Liquefaction’, Energies, 17(14), p. 3427. Available at: https://doi.org/10.3390/en17143427.

Wu, X., Wang, Z., Dong, M., et al. (2021) ‘A Critical Analysis of Natural Gas Liquefaction Technology’, Fluid Dynamics & Materials Processing, 18(1), pp. 145–158. Available at: https://doi.org/10.32604/fdmp.2022.018227.

Wu, X., Wang, Z., Dai, X., et al. (2021) ‘Optimization Design and Analysis of Single-Stage Mixed Refrigerant Liquefaction Process’, Frontiers in Energy Research, 9. Available at: https://doi.org/10.3389/fenrg.2021.766588.

Wu, X. et al. (2023) ‘Effect of Refrigerant on the Performance of a C3/MRC Liquefaction Process’, Fluid Dynamics & Materials Processing, 19(1), pp. 25–36. Available at: https://doi.org/10.32604/fdmp.2023.020953.

Yang, J., Li, Y. and Tan, H. (2023) ‘Integrated hydrogen liquefaction process with a dual-pressure organic Rankine cycle-assisted LNG regasification system: Design, comparison, and analysis’, Applied Energy, 347, p. 121372.

Yazdaninia, A. et al. (2021) ‘Simulation and Thermodynamic Analysis of a Closed Cycle Nitrogen Expansion Process for Liquefaction of Natural Gas in Mini-scale’, 6(1).

Zhang, J., Meerman, H., Benders, René, et al. (2020) ‘Comprehensive review of current natural gas liquefaction processes on technical and economic performance’, Applied Thermal Engineering, 166, p. 114736. Available at: https://doi.org/10.1016/j.applthermaleng.2019.114736.

Zhang, J., Meerman, H., Benders, Rene, et al. (2020) ‘Technical and economic optimization of expander-based small-scale natural gas liquefaction processes with absorption precooling cycle’, Energy, 191, p. 116592. Available at: https://doi.org/10.1016/j.energy.2019.116592.

Zou, C. (2020) New Energy. Singapore: Springer Singapore. Available at: https://doi.org/10.1007/978-981-15-2728-9.

Zuhuri, B., Mossavar-Rahmani, F. and Behgounia, F. (2022) ‘Chapter 14—Renewable Energy’, Knowledge is Power in Four Dimensions: Models to Forecast Future Paradigm, pp. 423–463.