Monday, April 30, 2007
6-15

Analysis of kinetic and operational parameters in a structured model for acrylic acid production through experimental design

Betânia H. Lunelli, Department of Chemical Process – School of Chemical Engineering, State University of Campinas - UNICAMP, Cidade Universitária, Campinas, 13083970, Brazil, Rubens Maciel Filho, Department of Chemical Process – School of Chemical Engineering, State University of Campinas – UNICAMP, Cidade Universitária, Campinas, 13083970, Brazil, and Elmer C. Rivera, Department of Chemical Process – School of Chemical Engineering, State University of Campinas - UNICAMP, Cidade Universitária, Campinas, 13083970, Brazil.

A great challenge related to preservation of the environment is the exhaustion of raw material based on oil. The population growth and the associate demand for fuels and chemicals have increased the research and development for the use of more diversified and renewable raw material.

In biotechnological processes, a great number of factors can influence the income productivity and conversion. Normally, it is not evident which of these factors are most important. In this work it is used the multivariate analysis techniques, as experimental design to identify the parameters with the most significant impact on the model, to represent well the process as well as to identify a suitable way to adjust the model for the acrylic acid production process. It is proposed an alternative process, having sugar cane as feedstock, to the petrochemical based ones which have significant environmental impacts for their production. In order increase the competitiveness of renewable acrylic acid based process it is necessary to find out working near optimal operating conditions, which is not an easy task since the process is multivariable and non-linear.

With such procedure is possible, beyond the determination of the important factors of the process, to identify the structures of control for differentiated strategies of operation. The mapping of the dynamics of the developed process is made using techniques of factorial design together with the methodology of Plackett-Burman. It is shown that it is possible to increase the process performance by choosing optimized conditions for the reactor operation.