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Reutilization of MgO Byproducts from the Calcination of Natural Magnesite in Dry Desulfurization: A Closed-Loop Process

Dry desulfurization is an attractive alternative to wet flue gas desulfurization (WFGD) because it avoids wastewater management and requires less energy inputs and lower operation costs. In this research, the byproducts from a process generating the SO2 emissions were tested for dry desulfurization. Thus, the same byproducts from the calcination of natural magnesite (two cyclone dusts from the air pollution control system, LG-MgO and LG-D, and one fraction obtained after calcination, LG-F) that were already studied in a WFGD were assessed in a dry desulfurization process. The byproducts were tested raw and modified by two hydration methods and in semi-dry conditions. The SO2 sorption performance was evaluated by means of breakthrough curves (parts per million of SO2 at the outlet versus time) and desulfurization potential (liters of SO2 adsorbed per kilogram of byproduct). Accordingly, the byproducts showed good performance with respect the lime used as adsorbent in conventional dry flue gas desulfurizati...

Authors:   R. del Valle-Zermeño; J. de Montiano-Redondo; J. Formosa; J. M. Chimenos; M. J. Renedo; J. Fernández
Journal:   Energy & Fuels
Year:   2015
DOI:   10.1021/acs.energyfuels.5b00717
Publication date:   03-Jun-2015
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