Allied Chemical sulfur dioxide reduction technology

Figure 1. Allied Chemical sulfur dioxide reduction technology typical roaster...

Once the feed stream has been purified, the sulfur dioxide and oxygen dimensions must be defined. Depending upon its source, the sulfur dioxide may vary from a few tenths of 1% to 100% (dry basis), in combinations with oxygen from 0% up to the line shown on Figure 2. The dotted line represents the gas composition that results when 100% sulfur dioxide (dry basis) is diluted with air. The only gas compositions to which Allied Chemical sulfur dioxide reduction technology is not directly applicable are those in the shaded area at the lower left of this diagram. This lower boundary represents a practical limit which has been established by heat balance and thermodynamic considerations rather than by economic factors. 

In view of the considerable interest in sulfur dioxide reduction to sulfur both in this country and abroad, Allied Chemical extended the use of this technology to control sulfur dioxide emissions from other metallurgical operations as well as from fossil fuel combustion. The experience gained in design, construction, and operation of the large Canadian facility provided the perspective for continuing process research and parallel engineering development. 

Engineering, procurement, and construction of the entire facility at NIPSCO is the responsibility of Davy Powergas, Inc. Allied Chemical is providing the sulfur dioxide reduction process technology as well as... 

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