Selection of Desulfurizer and Control of Reaction Products on Flue-Gas Desulfurization Using Chemical-Looping Technology

Abstract

Chemical-looping technology (CLT) can achieve energy efficiency and reduce the environmental pollution and is usually conducted on a fixed-bed reactor. In this paper, the thermodynamic simulations for flue-gas desulfurization (FGD) systems with CLT are carried out using HSC Chemistry software to choose a suitable desulfurizer, control the type and quantities of reaction products, and collect sulfur-containing byproducts with high economic value. The Ellingham diagrams are developed to relate the Gibbs free energy of the relevant reactions to the temperature. The fixing-sulfur potential; the reaction degree with CO2, H2O, and CO; and the acceleration effect of removing NOx of different metal oxides in 100 to 300 °C are estimated. Compared comprehensively, Mn-based oxides have distinct advantages for flue-gas desulfurization using CLT. Based on calculation results, both low reaction temperatures (T 4) can effectively prevent the loss of sulfur element. In the regene...