The influence of salt impurities on foaming of N-methyldiethanolamine (MDEA) solutions was studied. Studies of the influence of individual ions on foaming of fresh MDEA solution showed that Ca2+, Fe2+, Mg2+, and Sr2+ tended to induce foaming and stabilize the foam. The effects of the cations followed the order Fe2+ > Sr2+ > Mg2+ > Ca2+. The anions F–, CH3COO–, HCOO–, Cl–, Br–, SO4 2–, C2O4 2–, S2O3 2–, and SCN– exerted a slight inhibitory effect on foaming. The order of the tendency to induce foaming changed to Sr2+ > Mg2+ > Fe2+ > Ca2+ if these ions were present simultaneously in the solution. Ca2+ enhanced significantly the tendency to induce foaming but had no effect on the foam stability. Fe2+ and Sr2+ had a synergic effect on the tendency to induce foaming and stabilize the foam.
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Financial support received from the National Science and Technology Major Projects (No. 2011ZX05017) and SWPU Pollution Control of Oil & Gas Fields Science & Technology Innovation Youth Team (No. 2013XJZT003) is gratefully acknowledged.
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Translated from Khimiya i Tekhnologiya Topliv i Masel, No. 4, pp. 15 – 19, July – August, 2015.
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Liu, Y., Zhang, B., Wu, D. et al. Influence of Salt Impurities on Foaming Properties of MDEA Desulfurization Solution. Chem Technol Fuels Oils 51, 353–360 (2015). https://doi.org/10.1007/s10553-015-0612-y
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DOI: https://doi.org/10.1007/s10553-015-0612-y