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# SAMPLE MODELING THE SAX BROTHERS Kontakt 212 Prorap

Beginning in the 1950s, the Department of Health and Human Services began supporting and promoting community-based service systems that developed the characteristics and processes necessary to provide a broad range of services to individuals and families, including people with severe and complex disabilities and their families. A number of federal programs for the development and expansion of community-based service systems are described in this report. A computer-based method is described for modeling the effect of the conversion of sulfur dioxide to sulfuric acid using alkali on the maximum feasible process temperature (¡K) for the reaction. Algebraic modeling can be used to accurately compute the temperature which must be used to maintain the desired sulfuric acid concentration over a range of sulfur dioxide concentration in the feed gases. The modeling was done using the ZABC-S software package developed by the J. F. Meycoff (Ohio State University) group. The modeling was performed using a set of discrete algebraic equations to describe the sulfuric acid concentration in the molten sulfur by the end of the absorption step and the sulfuric acid concentration in the absorbent. An algebraic equation was developed to compute the change in the sulfuric acid concentration as a function of temperature at the end of the absorption step. These algebraic equations were integrated over the surface area of the molten sulfur to compute the rate of change of the sulfuric acid concentration as a function of time. These equations were used to compute the temperature change as a function of time at the end of the absorption step. Using these temperatures at the end of the absorption step, the sulfuric acid concentration at the end of the absorption step was computed using equations from the chemistry of molten sulfur to describe the reactions of sulfur dioxide and sulfuric acid in the molten sulfur. An equation was developed to describe the end concentration of sulfuric acid in the absorbent in terms of the sulfuric acid concentration in the absorbent at the beginning of the absorption step. The equation was used to model the sulfuric acid recovery process as a function of the sulfuric acid concentration in the absorbent at the beginning of the absorption step. This equation was then used to compute the change in the sulfuric acid concentration as a function of the sulfuric acid concentration in the absorbent at the beginning of the absorption step. These equations were integrated over the surface area of the absorbent to compute the rate of change of the sulfuric acid concentration as a function of time. Using these temperatures at the end of the absorption step, the sulfuric acid concentration in the absorb ac619d1d87

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