Abstract
CO2 is the primary greenhouse gas emitted through human activities which cause global warming. Many countries and international regulations aim to reduce CO2 and encourage development of a net-zero society by 2050, thus, CCUS (carbon capture, utilization, and storage) can be considered as a key technology for achieving this goal. Among the many industrial processes, NaHCO3 production is a representative CCUS technology which satisfies both CO2 reduction and economic incentive. Recently, Na2SO4 waste, containing 15% impurities (i.e., various heavy metals), produced as a by-product generated from desulfurized processes in steel industry has received a great deal of attention since landfilling has been the only way to treat it. Na2SO4 could be a suitable source of NaHCO3 production as CCUS; however, there are no commercial processes for production of NaHCO3 using Na2SO4 as the raw material, since it has low production efficiency compared to other Na+ sources. This study evaluates the regeneration of NaHCO3 using Na2SO4 waste and our results show that a combination of Na2SO4 waste and the addition of 20% Na2CO3 can sharply increase the yield of NaHCO3 with minimizing the consumption of expensive NH3 since alkaline properties of Na2CO3.
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The data that support the findings of this study are available on request from the corresponding author (J. G. Min).
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Acknowledgements
This work was supported by Korea Environment Industry & Technology Institute (KEITI) through R&D Project for Intelligent Optimum Reduction and Management of Industrial Fine Dust, funded by Korea Ministry of Environment(MOE)(2022003580004).
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Lim, C., Byun, Y., Kim, H.G. et al. Effect of Na2CO3 on Production of NaHCO3 Using Desulfurized Na2SO4 Waste. Korean J. Chem. Eng. (2024). https://doi.org/10.1007/s11814-024-00137-x
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DOI: https://doi.org/10.1007/s11814-024-00137-x