Progress of the technique of coal microwave desulfurization

摘要: With the advantages of its fast speed, effective and moderate controllable conditions, desulfurization coal by microwave has become research focus in field clean technology. Coal is a homogeneous mixture which consists various components with different dielectric properties, so their abilities to absorb microwaves are different, sulfur-containing better absorbers microwave, makes them can be selectively heated reacted under irradiation. There still remain controversies on principle at present, thermal effects or non-thermal effects. The point mainly base characters rapidly selectly heating. While, view effect, direct interactions between electromagnetic sulfur containing proposed. It fundamental problem determine properties reveal interaction compounds. However, test property affected many factors, it difficult measure accurately. In order achieve researchers employ methods adding chemical additives such as acid, alkali, oxidant, reductant, changing reaction atmosphere, combining other magnetic separation, ultrasonic microorganism. Researchers this have also put forward several processes, obtained number patents. Obscurity mechanism, uncertainties qualitative quantitative analysis functional groups coal, lack special equipment limited further development