The kinetics of the reverse Deacon reaction
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The function of the Department of Chemical and Biological Engineering has been to prepare students for the study and application of chemistry in industry. This focus has included preparation for employment in various industries as well as the development, design, and operation of equipment and processes within industry.Through the CBE Department, Iowa State University is nationally recognized for its initiatives in bioinformatics, biomaterials, bioproducts, metabolic/tissue engineering, multiphase computational fluid dynamics, advanced polymeric materials and nanostructured materials.
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The Department of Chemical Engineering was founded in 1913 under the Department of Physics and Illuminating Engineering. From 1915 to 1931 it was jointly administered by the Divisions of Industrial Science and Engineering, and from 1931 onward it has been under the Division/College of Engineering. In 1928 it merged with Mining Engineering, and from 1973–1979 it merged with Nuclear Engineering. It became Chemical and Biological Engineering in 2005.
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1913 - present
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- Department of Chemical Engineering (1913–1928)
- Department of Chemical and Mining Engineering (1928–1957)
- Department of Chemical Engineering (1957–1973, 1979–2005)
- Department of Chemical and Biological Engineering (2005–present)
- College of Engineering(parent college)
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Abstract
The reverse Deacon reaction, Cl(,2) + H(,2)O (--->) 2HCl + 1/2 O(,2) is considered one of the most important steps in thermochemical water-splitting processes, for production of hydrogen from water. The purpose of the research undertaken was to investigate the kinetics of the chlorination of water vapor at high temperatures. An eleven-pass glass reactor 4 mm ID and 511 mm long was used. Stimulus-response experiments showed the reactor could be analyzed by plug flow procedures. The rate expression for the reverse Deacon reaction was developed from the experimental data at 879(DEGREES)K. Varying the partial pressures of the reactants, the rate data were collected, and these results were synthesized to formulate the rate Law; The rate expression was verified by the integral approach and the results were extended to two other temperatures, 777 and 983(DEGREES)K. The parameters of the rate expression were obtained by means of a linear-least-square fit. The frequency factor and the energy of activation were determined for the reverse Deacon reaction. An attempt was made to verify these parameters with the theoretical values from collision theory and activated complex theory. A mechanism consistent with one of the limiting conditions was postulated. A statistical study was also made to reveal the effects of the flow rates of the reactants and temperature on conversion of chlorine.