Carbon dioxide hydrate formation in pure water and highly saline water

Carbon dioxide hydrate formation in pure water and highly saline water

SIRISHA Nallakukkala, BHAJAN Lal, HANI Abulkhair, ABDULMOHSEN Alsaiari, IQBAL Ahmad, EYDHAH Almatrafi, OMAR Bamaga, AZMI Mohd Shariff

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Abstract. In this study, the hydrate kinetics for CO2 gas was assessed in treating highly saline water at 3 MPa and 275.15 K to acquire perception towards water recovery and uptake of gas for desalination purpose. The experimentation was performed using a stainless-steel reactor by implementing isochoric (constant cooling) technique in treating highly saline water and related with the deionized water system. The study discloses that CO2 hydrate forms quicker in deionised water at 75 mins achieving uptake of CO2 gas as 0.0575 mol/mol with a recovery of 65.7% as opposed to 83.5 mins and uptake of gas of 0.0505 mol/mol and water recovery of 45.5% in 2.8wt% saline water sample. Hence it is evident that the existence of salts slightly inhibits the formation of hydrate but still produces a higher percentage of water recovery compared to conventional technologies. The results from this study are useful for the design of the efficient reactor for hydrate desalination.

Gas Hydrate-Based Desalination, Produced Water, Water Recovery, Gas Uptake, CO2 Hydrate

Published online 5/20/2023, 8 pages
Copyright © 2023 by the author(s)
Published under license by Materials Research Forum LLC., Millersville PA, USA

Citation: SIRISHA Nallakukkala, BHAJAN Lal, HANI Abulkhair, ABDULMOHSEN Alsaiari, IQBAL Ahmad, EYDHAH Almatrafi, OMAR Bamaga, AZMI Mohd Shariff, Carbon dioxide hydrate formation in pure water and highly saline water, Materials Research Proceedings, Vol. 29, pp 51-58, 2023


The article was published as article 7 of the book Sustainable Processes and Clean Energy Transition

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