Removal of manganous dithionate (MnS2O6) with MnO2 from the desulfurization manganese slurry

Yang, Lin; Wang, Cheng; Lu, Yong; Jiang, Wenju; Jiang, Xia; Li, Jianjun

doi:10.1039/c9ra09810k

Cited by 5 publications

(1 citation statement)

References 33 publications

(50 reference statements)

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“…Furthermore, the Fe(III)-MnCO 3 system had a higher total content of SO 3 2− and SO 4 2− , providing evidence of its superior SO 2 removal performance. MnS 2 O 6 is an unavoidable by-product of manganese-based flue gas desulfurization that can compromise not only the purity of manganese sulfate but also the subsequent electrolysis progress [35,36]. Therefore, control of MnS 2 O 6 is of great importance for practical applications.…”

Section: The Influences Of Fe(iii) On So2 Removal By Mnco3mentioning

confidence: 99%

Removal and Resource Utilization of High Concentration Flue Gas Sulfur Dioxide Using Manganese Carbonate Ore

et al. 2023

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The removal of high concentration flue gas sulfur dioxide (SO2) using manganese carbonate ore desulfurization (MCO-FGD) is a promising route that combines economic benefits and pollution control. However, the problems of intermediate oxidation and by-product control have plagued the industrial application of the MCO-FGD technique for a long time. Based on the fact that there is symbiosis of manganese and iron in natural manganese ore, in this study, small amounts of Fe(III) and MnO2 were introduced into the MCO-FGD reaction system to enhance the oxidation of SO2 to SO4− and suppress the manganous dithionate (MnS2O6) by-product generation. The results suggested that the addition of Fe(III) led to the generation of potent oxidant Mn(III) in the reaction system, which accelerated the generation of SO3−• radicals and, thus, enhanced the oxidation of SO2. Under the optimum reaction conditions, the 2.0% of inlet SO2 could be removed to 62 ppm, obtaining 90.1% manganese leaching efficiency, and the concentration of MnS2O6 in the desulfurized liquid was kept below 2.5 g/L after a six-stage desulfurization. The results are of great importance for the sustainable development of the manganese metallurgical industry, which provides theoretical and technical support for the recycling of sulfur and manganese. The influences of different operational conditions on SO2 removal, the catalytic mechanism, and manganese leaching were studied to provide theoretical and technical support for resourceful MCO-FGD technology.

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Section: The Influences Of Fe(iii) On So2 Removal By Mnco3mentioning

confidence: 99%

Removal and Resource Utilization of High Concentration Flue Gas Sulfur Dioxide Using Manganese Carbonate Ore

et al. 2023

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Selective Recovery of Manganese from Low-Grade Ferruginous Manganese Ores Through SO2 Leaching

Kallam

Pandey

Tripathy

et al. 2022

Mining, Metallurgy & Exploration

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Enhanced recovery of dithionate from desulfurization with pyrolusite system by manganese dioxide anode of spent batteries

Deng

Zhang

et al. 2020

Advanced Powder Technology

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Removal of manganous dithionate (MnS₂O₆) with MnO₂ from the desulfurization manganese slurry

Abstract: The manganous dithionate by-product of the desulfurized slurry could be oxidized with MnO2 without any impurity. σ-MnO2 showed the best activity due to its high surface area and expose much more surface-active oxygen.

Cited by 5 publications

References 33 publications

Removal and Resource Utilization of High Concentration Flue Gas Sulfur Dioxide Using Manganese Carbonate Ore

Removal and Resource Utilization of High Concentration Flue Gas Sulfur Dioxide Using Manganese Carbonate Ore

Selective Recovery of Manganese from Low-Grade Ferruginous Manganese Ores Through SO2 Leaching

Enhanced recovery of dithionate from desulfurization with pyrolusite system by manganese dioxide anode of spent batteries

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