The Petlyuk distillation configuration has received considerable attention because of its efficiency to reduce the energy required for the separation of ternary mixtures. The structure of the Petlyuk system offers some control challenges arising from the transfer of vapor streams back and forth between the columns. This means that neither of the columns can have a uniform lower nor higher press...

The method of false nearest neighbors (FNN) is presented here as a tool for analyzing the \dimensionali-ty" of a nonlinear input/output system directly from data. A unique feature of this method is that no speciic model structure is assumed, the dimensional determination is made directly from topological considerations. An extension to the FNN algorithm is given to consider the problem of infer...

Using zeotropic mixtures as working fluids can improve the thermal efficiency of Organic Rankine cycle (ORC) power plants for utilising geothermal energy. However, currently, such ORC systems cannot regulate the composition of zeotropic mixtures when their operating conditions change. A compositionadjustable ORC system could potentially improve the thermal efficiency by closely matching the cyc...

With the increasing of blog users, the traditional blog search can no longer meet their demands. More work should be done to accommodate the need of finding good blogs to read, besides the topicrelevant blogs. This paper focuses on the problem of an in-depth faceted blog distillation for addressing the quality aspect of the retrieval blogs. We propose a novel L-Qtf coefficient and LQE model to ...

Reactive distillation is an attractive option for equilibrium limited reactions. For highly nonideal systems, the selection of liquid phase activity model considerably influences the model predictions. In this work, activity models proposed in literature and available in RADFRAC module of Aspen Plus are compared for ethyl acetate production through reactive distillation. Also, a hybrid modellin...

A control of phenolic and furanic compounds in cider brandy was carried out during maturation in oak casks, studying three technological factors: distillation (rectification column vs double distillation), oak wood type (French vs American), and aging time (32 months). Gallic acid and benzoic and cinnamic aldehydes significantly increased during maturation of cider brandies, the highest level o...

Typical production objectives in distillation process require the delivery of products whose compositions meet certain specifications. The distillation control system, therefore, must hold product compositions as near the set points as possible in faces of upset. In this project, inferential model predictive control, that utilizes an artificial neural network estimator and model predictive cont...

Traditionally polyester production is done in a batch reactor equipped with a separation column for batch distillation. A promising alternative for the intensification of this process is reactive distillation. In this paper, a reactive distillation model is developed for the synthesis of an unsaturated polyester process. The simulation results are compared with the industrial batch reactor outp...

Previous studies have revealed it is possible to separate a high-boiling mixture by gas chromatography in empty fused-silica capillary tubing rather than in columns coated with stationary phase. Chromatographic separation occurs solely on the basis of the different boiling points of the substances separated. The high similarity of such separations to those in classic distillation seems advantag...

The TREC 2003 web track consisted of both a non-interactive stream and an interactive stream. Both streams worked with the .GOV test collection. The non-interactive stream continued an investigation into the importance of homepages in Web ranking, via both a Topic Distillation task and a Navigational task. In the topic distillation task, systems were expected to return a list of the homepages o...