10th International Symposium on Process Systems Engineering: by Rita Maria de Brito Alves, Claudio Augusto Oller do

By Rita Maria de Brito Alves, Claudio Augusto Oller do Nascimento, Evaristo Chalbaud Biscaia Jr.

This booklet includes the complaints of the10th variation of a sequence of foreign symposia on technique structures Engineering (PSE)initiated in 1982. The specific concentration of PSE09 is how PSE equipment can aid sustainable source platforms and rising applied sciences within the components of eco-friendly engineering.

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The tools of process analytical chemistry like Infrared (IR) and Near Infrared (NIR) spectroscopy fulfill the necessary requirements for real-time analysis of important properties for a broad variety of materials (Workman, 1999). The principle underlying process monitoring from spectra is the existence of a relationship between the spectrum of a given product and the property of interest. The relationship is rarely known a priori but it can be reconstructed from data by calibrating multivariate models.

The monitoring problem consists of modeling and analyzing the operational behavior of an industrial deethanizer, starting from a set of online process measurements. The motivation for choosing this unit is merely illustrative. The column offers a variety of behaviors that reflects the operational usage, hence an interesting groundwork for discussion. The deethanizer, in Fig. 1, is operated to separate ethane from a feed (a light naphtha) while minimizing the ethane extracted from the bottom (an economical constraint for the subsequent unit in the plant).

The vertexes of the triangle) to the new data point x(i) and determine its position within the enclosing simplex. Any property y(i) of the new observation is estimated as a weighted sum of the properties of the known points: yˆ (i) = 1 (i)y(x1 ) + 2 (i)y(x 2 ) + 3 (i)y(x 3 ), (2) where y(x 1), y(x 2) and y(x3) are the values of the property for the vertexes. Once the weights are calculated, the estimation of any property is immediate. It is also straightforward to generalize Equation 1 and 2 to more than two dimensions.

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