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

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.