Thermodynamic Models for Vapor-Liquid Equilibria of Nitrogen+Oxygen+Carbon Dioxide at Low Temperatures

For the design and optimization of CO2 recovery from alcoholic fermentation processes by distillation, models for vapor-liquid equilibria (VLE) are needed. Two such thermodynamic models, the Peng-Robinson equation of state (EOS) and a model based on Henry's law constants, are proposed for the ternary mixture N2+O2+CO2. Pure substance parameters of the Peng-Robinson EOS are taken from the literature, whereas the binary parameters of the Van der Waals one-fluid mixing rule are adjusted to experimental binary VLE data. The Peng-Robinson EOS describes both binary and ternary experimental data well, except at high pressures approaching the critical region. A molecular model is validated by simulation using binary and ternary experimental VLE data. On the basis of this model, the Henry's law constants of N2 and O2 in CO2 are predicted by molecular simulation. An easy-to-use thermodynamic model, based on those Henry's law constants, is developed to reliably describe the VLE in the CO2-rich region

Specific immuno-modulation and therapy by means of high pressure treated allergens.

A high-pressure treatment (> 100 MPa) can change the quarternary, tertiary, and secondary structures of proteins. Experiments have shown the prospects of high-pressure treatment for the development of viral and tumour vaccines, for the inactivation of resected infection- and tumour-bearing bone segments and for the decrease of food allergenicity. Allergic patients had minor or no allergy symptoms against high pressure treated foods, which were birch pollen allergy related (hazelnut, carrot, cherry, peach, celery, and apple). Three patients with a heavy allergy against apple could be hyposensitized by means of a specific immuno-therapy with high pressure treated apple

How to select a collector?

The collector is the main element that affects the solar system's performance. The collector's efficiency is affected by its operating temperature. Different levels of heating were considered for a milk-processing factory. The optimal collector type (i.e. the one with the minimum payback period) that can be used for these levels was deduced.Food industry Milk processing Optimum Payback Solar collector

Untersuchung neuer Ringfluessigkeiten fuer den Fluessigkeitsringverdichter einer Hochtemperatur-Kompressions-Waermepumpe mit dem Arbeitsmedium Wasser Schlussbericht

SIGLEAvailable from TIB Hannover: F01B810 / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekDeutsche Bundesstiftung Umwelt, Osnabrueck (Germany)DEGerman