Detailed Modeling of Distillation Technologies for Closed-Loop Water Recovery Systems.

Dynamic Modeling of Process Technologies for Closed-Loop Water Recovery Systems.

“…Steady-state solution chemistry results are also presented. The results from the distiller modeling were presented earlier this year 19 . The simulation results for the ACM VRA model were compared to results from the previous VRA model as well as test data 19…”

“…Equations (16) and (17) (19) where k sk is a rate constant for reaction k, K i is an effective adsorption equilibrium constant for species i, and n ki , ν i , and m k are constant exponents. For the VRA model, all n ki and ν i have been set equal to 1.…”

“…Several updates to the VCD model have been incorporated since previous reports on distillation model development 5,19 The dynamic study for the VCD incorporated several aspects focusing on the distillation assembly. Close examination of the temperature profiles within the distiller (Fig.…”

“…This report discusses the development of dynamic process simulations for the CDS, VCD and WFRD distillation technologies. ® (ACM) (Aspen Technology, Inc., Burlington, MA), is a chemical process modeling package that has the ability to perform both steady-state and dynamic simulations 4 and has been used frequently for developing detailed models for various engineering analyses 5,6 By relating operating and hardware-related variables to process efficiency, it is possible to optimize the unit sizing and its operating parameters. Accurate models can even generate data for a wide variety of operating conditions, which can then be used to develop a process control strategy that is based on process-specific operating data instead of a generalized theoretical description.…”

“…Comparisons of calculated mass transfer coefficients, transport properties and liquid phase Figure 16. Comparison of reactor model predictions to VRA data and previous modeling results for ethanol oxidation at a reactor temperature of 126.7ºC 22 .…”