Structured packing has been widely used because of large surface area that makes possible columns with high capacity and efficiency. The large surface area also contributes to fire hazards because of hydrocarbon deposits that can easily combust and promote combustion of the thin metal packing materials. Materials of high surface area that can fuel fires include reactive metals, such as titanium...

A mechanistic, parallel channel model was developed and validated experimentally to enable the prediction of mass transfer performance of the Katapak-SP, a novel, modular catalytic structured packing. Total reflux distillation experiments were carried out at atmospheric pressure in a column with internal diameter of 0.45 m, using aqueous (Methanol/Water) and organic (Cyclohexane/n-Heptane) test...

The mass transfer performance the Katapakw-SP has been evaluated experimentally and the Delft MCSP model, a parallel channel model is developed to predict the HETP as function of F-factor. Pilot scale (i.d. 450 mm) total reflux distillation experiments were done with an aqueous system Methanol/Water and organic system Cyclohexane/n-Heptane. With the latter, two types of Katapak-SP were tested. ...

Title of dissertation: INFORMATION THEORETIC SECRET KEY GENERATION: STRUCTURED CODES AND TREE PACKING Sirin Nitinawarat, Doctor of Philosophy, 2010 Dissertation directed by: Professor Prakash Narayan Department of Electrical and Computer Engineering Institute for Systems Research This dissertation deals with a multiterminal source model for secret key generation by multiple network terminals wi...

Packed columns are equipment commonly found in absorption, distillation, stripping, heat exchangers and other operations, like removal of dust, mist and odors and for other purposes. Mass transfer between phases is promoted by their intimate contact through all the extent of the packed bed. The main factors involving the design of packed columns are mechanics and equipment efficiency. Among the...

In this paper we study a variant of the bin packing problem in which the items to be packed are structured as the leaves of a tree. The problem is motivated by document organization and retrieval. We show that the problem is NP-hard and we give approximation algorithms for the general case and for the particular case in which all the items have the same size.

We study the hierarchically structured bin packing problem. In this problem, the items to be packed into bins are at the leaves of a tree. The objective of the packing is to minimize the total number of bins into which the descendants of an internal node are packed, summed over all internal nodes. We investigate an existing algorithm and make a correction to the analysis of its approximation ra...

This paper deals with the modeling of gas-liquid flow in distillation columns equipped with structured packing. The devices are seen as bi-structured porous media and a macro-scale model is proposed taking into account this specific geometry. In this model, the two liquid films, one-per-sheet, are treated separately and are allowed to exchange matter at the vicinity of the contact points betwee...

Raschig Super-Pak is a novel development in structured packing product technology that is fundamentally different to the well known corrugated perforated or nonperforated, textured sheet metal structured packings. It comprises of a systematic sequence of smooth sinusoidal waves above and below the plain of the metal sheet. Total reflux distillation tests with Raschig Super-Pak 300 were conducte...