Experiment and Mechanism Analysis of Desulfurization with a MgO-Based Desulfurizer Fixed Bed Method

Abstract

To reduce the cost of the current commercial desulfurization and eliminate effluents, the MgO-based desulfurizer fixed bed desulfurization tests were carried out in a dry environment. By means of X-ray diffraction, scanning electron microscopy, and X-ray photoelectron spectroscopy, the absorption effects of the MgO-based desulfurizer on SO2 were thoroughly investigated. Physical and chemical analyses show that most of the SO2 diffused on the desulfurizer surface was oxidized into sulfate and some SO2 entered the inner hole and the microhole of the desulfurizer. The technology was applied to sintering flue gas and achieved 97% stable desulfurization at low temperatures, which indicates that the MgO-based desulfurizer has obvious industrial competitive advantages.