DELTA analysis program

The heat balance exercise provides a tool for in-depth analysis of the unit operation. Heat balance surveys determine catalyst circulation rate, delta coke, and heat of reaction. The procedures described in this chapter can be easily programmed into a spreadsheet program to calculate the balances on a routine basis. 

Polydisperse Suspensions. Polydisperse suspensions were approximated by mixtures of monodisperse suspensions. In order not to introduce any bias in the analysis, all the data from three different instruments were analyzed using the same program. The distribution functions were assumed to be a sum of equally spaced histograms for PCS, delta functions for TS and logarithmically spaced histograms for FDPA. The height and position of each parameter was optimized using a nonlinear least squares minimization process (15). 

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