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BATCH REACTOR SCALE-UP ASSISTED BY STATISTICAL EXPERIMENTAL DESIGN

BATCH REACTOR SCALE-UP ASSISTED BY STATISTICAL EXPERIMENTAL DESIGN,O. Prieto,G. Prieto,C. R. Gay

BATCH REACTOR SCALE-UP ASSISTED BY STATISTICAL EXPERIMENTAL DESIGN  
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It is well known, that in general reactors scale-up is quite impossible to afford by using only theoretical methods. Laboratory and/or pilot plant data of the reactions are necessary. The chemical reactions are indirectly affected by the reactor type and scale in a way very difficult, if not impossible to quantify, because changes in the reaction global velocity and/or changes in the products distributions may evolve. The chemical reactions are influenced by physical processes such as mass transference and heat transference, in general controlled by the reactor shape and dimensions. Statistical experimental designs methods represent a powerful tool due to they minimize the number of experimental runs, consequently costs are diminished, and additionally they reduce the levels o risks. The scale-up methodology was centered in two different procedures, the gradual reactor size increment and the use of a big reactor increasing the volume of the reaction system. The reaction selected was the catalytic oxidation of sucrose in a glass Batch reactor. The behavior of the system could be easily visualized by registering only the temperature evolution. The scale-up or change of scale in a chemical reactor involves multidisciplinary scientific- technical strategies searching for practical solutions to the problems that usually appear. Then, the use of methods based on principles of similitude, mathematical modeling or a combination of both, as well of statistical methods, must be the result of a careful analysis to minimize the costs of the scaling up study and to carry out an efficient investigation to get information highly reliable. The chemical reaction constitute one of the more complex process in the field of the chemical engineering because it is usually associated with mass and heat transfer phenomenon where the scale has a special signification. In the field of the chemical reaction engineering and the scaling up of the reactor size, the starting point is represented by the lab-scale basic research, following with the bench-scale, and finally the pilot plant-scale or eventually the industrial-scale for low volume production
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