A Simple Method for Determining the Colors of the Stars by Seares F.H.

By Seares F.H.

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Performance criteria. To account for the process performance from a life-span perspective, criteria related to economic, sustainability and responsiveness aspects are defined and embraced in the proposed design methodology. For the first time the interactions between economic performance, thermodynamic efficiency and responsiveness in RD process design are explored and possible trade-offs are identified. This research suggests that incorporating a sustainability-related objective in the design problem formulation might lead to promising benefits from a life-span perspective.

A minimum reactive azeotrope occurs when the line of possible reactive azeotropes runs between a local temperature minimum and a saddle point and when there is only one point of intersection with the line of chemical equilibrium. 3. Graphical determination of reactive azeotropy. Symbols: (◦): reactive azeotrope RAz at the given chemical equilibrium constant Keq ; π: pole at which stoichiometric lines coincide, xiπ = νi /Σνj . System features: chemical reaction A + B C. (adapted from Frey and Stichlmair (1999b)).

E. due to the different values of the heat of evaporation for pure components. Furthermore, the interaction between the temperature dependency of the reaction rates and the boiling temperature in the system has been suggested as one essential physical source for MSS. Mohl et al. (1997) identify two sources of MSS for esterification reactions: the interaction between separation and reaction (i) at simultaneous phase and reaction equilibria; and (ii) in the kinetic regime. According to Mohl et al. (2001) output multiplicity in RD appears to be caused essentially by the same phenomenon as in conventional distillation.

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