Nonlinear observer to estimate polarization phenomenon in membrane distillation

Nonlinear implicit on-line observer : application to the estimation in binary distillation columns

The current demand for more complex models has initiated a shift away from statespace models towards models described by both dynamic and algebraic equations, so-called implicit systems. These models arise as the natural product of real processes. In this paper, we consider design of observers for a class of implicit systems. The proposed observer combines the dynamic Newton-Raphson algorithm a...

Evaluation of Nonlinear Inferential Models to Estimate the Products Quality of Industrial Distillation Process

The problem of improvement of existing approaches for evaluation of inferential models used in the advanced process control systems is considered. The method of finding the identifiability index limit, based on the physically-chemical essence of the industrial distillation process, for the inferential models containing nonlinear transformations of measured inputs is given. The problem of handli...

The Group Polarization Phenomenon

Experiments exploring the effects of group discussion on attitudes, jury decisions, ethical decisions, judgments, person perceptions, negotiations, and risk taking (other than the choice-dilemmas task) are generally consistent with a "group polarization" hypothesis, derived from the risky-shift literature. Recent attempts to explain the phenomenon fall mostly into one of three theoretical appro...

Desalination by Membrane Distillation

Hybrid membrane-distillation processes

This work focuses on modelling, simulation and process analysis of hybrid membrane separations namely on distillation and pervaporation. Such hybrid process can be applied for the separation of multicomponent azeotropic mixtures without the use of entrainer. Its application is illustrated by the separation of a non-ideal ternary mixture of acetone, isopropanol and water. The extended abstract d...