Modelling Supercritical Phase Equilibria: Problems and Pitfalls

Deiters, Ulrich K.

doi:10.3311/ppch.12757

Cited by 1 publication

(1 citation statement)

References 18 publications

(21 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…When supercritical fluid employing processes are considered high pressure phase equilibrium and thermodynamics play always a key role. The Readers can get useful insights on the most common pitfalls found in some phase equilibrium modelling papers [1], familiarize with anomalous physico-chemical properties of the near critical region [2,3] having practical importance in the energy engineering. Practical solutions are presented on the application methodology of solubility parameters for cosolvent systems and expanded liquids.…”

Section: This Issue Of the Periodica Polytechnica Chemicalmentioning

confidence: 99%

Preface

Imre

Székely

2019

Period. Polytech. Chem. Eng.

View full text Add to dashboard Cite

This issue of the Periodica Polytechnica ChemicalEngineering is devoted to contributions in connection with the Applications of Supercritical Fluids 2018 conference, which was held at the Budapest University of Technology and Economics, Budapest, Hungary on 17 May, 2018. This was the 8th conference of the series initiated by Prof Béla Simándi in 1996.A substance is called a supercritical fluid at temperatures and pressures above the critical point of the given substance. However, for practical applications, instead of this thermodynamics based definition, the term supercritical is used in a much wider meaning and includes near-critical fluids, compressible liquids, pressurized gases, expanded liquids etc., based on their common behavior resulting from the relative proximity of the critical point of the main component of the mixture. When the pressure and temperature of solvents or their mixtures are relatively close to the critical point of the solvent we obtain a phase with largely variable properties; density, solvent power, diffusion coefficient, specific heat capacity, dielectric constant, viscosity etc. can be changed even by orders of magnitude by a simple modification of process parameters like pressure and temperature. Applications of supercritical fluids nowadays are very diverse. Extraction of solid matrices, typically plants and the de-asphalting of vacuum residue of crude oil, were the first important applications; supercritical chromatography, impregnation of wood, micronisation and particle formation, production of porous materials including aerogels, special heat transfer applications are examples of more recent applications.The goal of the conference series has always been to give an overview of the most exciting progress in the field of supercritical fluids of and for Hungarian researchers and professionals from industry. While the original focus of the conference was the application of supercritical fluids in chemical analysis, and chemical and food sectors, this year the scope was wider and included applications related to energy science as well.In the four sessions 17 lectures were presented, including Katalin Kamarás (Hungarian Academy of Sciences; nanotubes), Gerard Hofland (FeyeCon; drying of herbs), Ulrich Deiters (University of Cologne; phase equilibria) and Edit Székely (BME; hydrothermal liquefaction) as keynote speakers. In the coffee-breaks there was possibility for poster presentations and informal discussions of the nearly hundred participants. We would like to take this opportunity to thank the sponsors of the conference for their contributions (in alphabetic order): ABL&E-JASCO Magyarország Kft.,

show abstract

Section: This Issue Of the Periodica Polytechnica Chemicalmentioning

confidence: 99%