Abstract
Carbon materials mainly capture sulfur dioxide (SO2) from gas through physical adsorption, therefore their SO2 capture performance will decrease with the increase in desulfurization temperature. In order to meet the stringent requirements of deep desulfurization, further improvements on carbon materials are necessary, improving their SO2 capture performance and adaptability to changes in desulfurization temperature. In this study, a carbon material (NCP10) was modified with various alkali metal compounds with the aim of enhancing the SO2 capture performance and adaptability to temperature changes. The results showed that the NCP10/LiOH composite had the best average SO2 removal rate (100%) and SO2 capture capacity (\({113}.{6} \;{\text{mg}}_{{{\text{SO}}_{2} }} /{\text{g}}_{{{\text{material}}}}\)) within the first hour of reacting at 60 °C, the SO2 removal rate and SO2 capture capacity of the NCP10/LiOH composite were 29% and 29% higher than those of the pure NCP10 material, respectively. While the SO2 capture performance of the NCP10 modified with LiCl, Li2CO3, NaOH and KOH were not sufficient for deep desulfurization, the SO2 capture performance of the NCP10/LiOH(2:1) composite was able to meet the requirements of deep desulfurization in the temperature range of 25–100 °C by the physical adsorption and chemical absorption synergistically effect.
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Acknowledgements
This work was financially supported by the Open Fund of Science and Technology on Thermal Energy and Power Laboratory (TPL2020A02), and the Key-Area Research and Development Program of Guangdong Province (2020B0202010004).
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This work was financially supported by the Open Fund of Science and Technology on Thermal Energy and Power Laboratory (TPL2020A02), and the Key-Area Research and Development Program of Guangdong Province (2020B0202010004).
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XL contributed to ideas, formulation and evolution of overarching research goals and aims, performed the data analyses and wrote the manuscript. TH helped perform the analysis with constructive discussions. TZ performed the experiment. XL analyzed and synthesize studied data. HH contributed to preparation, creation and presentation of the published work, and review, commentary and revision including pre- or post-publication stages. YC helped perform the analysis with constructive discussions.
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Li, X., Huhe, T., Zeng, T. et al. Preparation and SO2 capture performance of NCP10/LiOH carbon-based composite for deep desulfurization. Res Chem Intermed 49, 3605–3626 (2023). https://doi.org/10.1007/s11164-023-05036-0
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DOI: https://doi.org/10.1007/s11164-023-05036-0