| abstract |
Dry methods, apparatus, compositions and systems are provided for reducing emissions of sulfur oxides, particularly sulfur dioxide, and / or HCl. In the method, the gas-containing SO x and / or at an effective temperature, with a short but effective residence time, to provide sufficient sulfur dioxide and / or HCl reduction with high efficiency reaction and adsorbent use. A combination of dolomite hydrate adsorbent and adsorbent doping agent used to achieve the coverage (coverage) of the three-dimensional cross-section of the path carrying HCl is used. The once-through drying method can beneficially introduce adsorbents and adsorbing dopants in a dry state, or preferably in a slurry that allows uniform processing. Preferred adsorptive doping agents include water-soluble or water-dispersible copper and / or iron compositions that can be heated in situ by the flue gas being treated to form the active form. [Selection] Figure 1 |