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Shortcut Method (shortcut + method)

Distribution by Scientific Domains
Chemistry100%

Selected Abstracts

Shortcut method for kinetically controlled reactive distillation systems

AICHE JOURNAL, Issue 6 2003
J. W. Lee
A geometric-based shortcut method for reactive distillation is addressed. The rectification body method for nonreactive distillation, the concept of critical Damköhler numbers, and the geometric design method for reactive distillation are combined with a new eigenvector analysis of pinch points. This shortcut method provides a minimum or reasonable Damköhler number for a given heat duty, as well as the design implication of how to effectively distribute reaction zones inside a column. This method can be used for a fast screening of process design alternatives and for an initialization of rigorous optimization. [source]

Robust design of countercurrent adsorption separation processes: 5.

AICHE JOURNAL, Issue 7 2000
Nonconstant selectivity
Operating conditions for the separation of a binary mixture using a nonadsorbable eluent through simulated moving-bed technology were designed. The results obtained using equilibrium theory for adsorption described by Langmuir models lead to the definition of explicit constraints on the operating parameters to operate the unit in the desired regime of separation. A more general approach was able to produce the same result for a larger class of isotherms. The physical and mathematical conditions defining this larger class of isotherms are discussed, as well as the algorithms necessary to calculate the region of complete separation. Applications to the bi-Langmuir isotherm and the ideal adsorbed solution model, which are more flexible than the Langmuir model and can describe systems where selectivity changes with composition, are discussed. A shortcut method to get an explicit, though approximate, solution is proposed and its accuracy is discussed. [source]

A Method for the Design of Divided Wall Columns

CHEMICAL ENGINEERING & TECHNOLOGY (CET), Issue 9 2007
N. Sotudeh
Abstract A divided wall column has been modeled as a Petlyuk column with no heat transfer across the column wall. The feed to the column has been generalized as a mixture of saturated liquid and vapor (0 shortcut method based on Underwood's equations has been introduced. Moreover, it is shown that the split of the internal reflux over both sides of the middle wall of the column is bounded and a method for choosing the proper value of the split ratio is suggested. This is a novel approach not attempted before by investigators. [source]