Abstract
Mn0x particles were successfully in situ doped on activated carbon via a redox deposition process. The effects of calcination temperature on the surface characteristics and desulfurization performance were studied. Desulfurization activity was evaluated at a fixed bed reactor in simulated flue gas. A remarkable promotional effect was observed by supporting Mn0 particles on activated carbon surface. Results showed that the sulfur capacity of activated carbon loaded by Mn0 was 312.81 mg/g under optimal conditions, which was 61% higher than that of blank activated carbon. Physiochemical properties of the composites were studied by characterizing wit BET, XRD, XPS, SEM and TEM. Better desulfurization performance of the nanocomposites was mainly attributed to stronger basicity of carbon surface and oxidation effect of S02 by Mn0. The formation of manganese sulfate after desulfurization indicated that Mn0 could be involved in the desulfurization process.
Keywords: Activated carbon, desulfurization, redox deposition, Mn0, oxidation, S02.
Graphical Abstract
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