Study On The Effects Of Br / AC On The Removal Of SO ₂ In Flue Gas

China is a country of large coal consumption. Along with the progress of the society and the requirement of sustainable development, it is inevitable to constantly improve the technology of SO2 removal from flue gas. Supported ionic liquids, which is composed of a certain porous solid loaded with ionic liquids, is an innovation to FGD technology which is used for removing SO2 in flue gas. It not only can change the surface structure of solids materials, but also can effectively decrease the viscosity of the ionic liquids and reduce the dosage of ionic liquids, thus provides a feasible way for the large scale application of ionic liquids in the removal of SO2 from flue gas.At present, the study of supported ionic liquids used for removing SO2 from flue gas is still at the laboratory stage, and is mainly focused on removing SO2 from simulated flue gas(N2+SO2). However the composition of actual flue gas is relatively more complex, so it is necessary to take into further consideration the interaction between the components. To simulate the actual flue gas, CO2, O2 and water vapor were introduced in the simulated flue gas(N2+SO2). Moreover, the effect of interaction between the components on SO2 removal by [BPy]Br/AC is investigated in this paper.In this paper, activated carbon is selected as the porous support for its various specific surface area and structure, which can be changed by many methods. Three kinds of activated carbon are selected in this paper, two of which are of dramatic difference in specific surface area, and the one of larger specific surface area was modified with nitric acid as the third support. The effect of specific surface area on SO2 removal by [BPy]Br/AC is studied, and the amount of oxygen-containing functional groups on different desulfurization agents were determined simultaneously to investigate the effect of oxygen-containing functional groups on desulfurization performance.The main results were described as follows:1. Either CO2 or O2 could inhibit the absorption of SO2 on [BPy]Br/AC.2. The [BPy]Br/AC desulfurization ability would be remarkably inhibited when all the gas components(water vapor, CO2, and O2) are present;3. The desulfurization ability of [BPy]Br/AC resluted from the combination of the pore structure and ionic liquid [BPy]Br, and the more developed the pore structure of activated carbon is, the more powerful the desulfurization ability would be;4. [BPy]Br Loaded on activated carbon can increase the amount of base of activated carbon surface, which is conducive to the removal of SO2.