Bewertung von Adsorbenzien zur Kraftstoffdampfnachbehandlung in Adsorbern für Personenkraftwagen

The challenges for the aftertreatment of fuel vapor in adsorbers of petrol‐engined passenger cars are increasing considerably due to the steady tightening of emission control laws. For the total work capacity of an adsorber, the sorption ability of the included adsorbent is crucial and, in turn, depends heavily on the particular fuel vapor being adsorbed. The corresponding adsorptive mixtures are analyzed by means of characterizing representative fuels. On this basis, characteristic material properties are compared and, thus, various adsorbents are evaluated.     

Verfahrenstechnische Bewertung von modernen Hochleistungsfüllkörpern für Stoffaustauschapparate

The development of the geometry of packings resulted in different open sturctures. The current high‐performance packings lead to the question whether or not their performance is different, or respectively, which performance figure is most suitable in order to evaluate potential advantages.     

Katalysatorscreening und Reaktormodellierung für die oxidative Methankopplung zur Brennwertanhebung von Biogas

The feed of biogas into the natural gas grid contributes to the success of the energy transition from fossil and nuclear fuels to renewables, because the usage of fed‐in biogas is highly diversified. But the necessary admixture of liquefied petroleum gas (LPG) to increase the heating value results in high costs and in a dependency on fossil fuels. Currently, the process of the oxidative coupling of methane to produce higher hydrocarbons from biogas, whereby an independent increase of the heating value will be possible, is investigated.     

Polytrope Kinetikmessung zur Bewertung von Ionenaustauscherharzen für die Veresterung von Acrylsäure mit n‐Butanol

A catalyst screening for the esterification of acrylic acid with n‐butanol is presented. The kinetics was investigated in the temperature range of 70 – 100 °C and the selectivity was determined. The kinetic data fitted well with the Langmuir‐Hinshelwood‐Hougen‐Watson approach. The model was applied for the design of a reactive distillation column. Due to the similar fluid dynamics and the fast data generation a temperature scanning plug flow reactor was used.     

Auslegung von Zyklonabscheidern für Notentlastungssysteme

The principal dimensions of cyclone separators for emergency response systems have been optimized by determination of the gas loading capacity for geometrically similar cyclones of 290 and 1000 mm diameter. For the experiments, separators made of Plexiglas with top or bottom mounted inlet tubes, with varying feed diameters and top and exit geometries. Moreover, the properties of the liquid in the binary mixture to be removed were also changed. For scale-up the gas volume flow density in the defiecting apron should be limited. Overall the measurements have shown that the optimized equipment is equally suited for removal of aqueous, viscous, and foaming media. The flows encountered in emergency blow-down of reactors can therefore be reliably separated. Compared to the recommendations given in the literature, significantly smaller equipment is required for the same separation performance.     

Produktdesign von Kunststoffen für die Waschmittelindustrie

Water soluble polymers in the detergent industry represent on the one hand parts of the formulations of washing powder to improve the washing result, and are used on the other hand as foils for the packaging of liquid detergent portions. Insoluble, thermoplastic polymers (PE, PP, PET) are needed as packaging materials for solids, pastes, suspensions and liquids in the form of laminated cardboard, boxes, bags, bottles, buckets and tubes. The polymers can be tailored to the application. For this purpose, not only the possibilities of the reaction and synthesis technology are available, but the addition of additives manages the adjustment of the required physical, technical and optical properties, such as color and durability. In an extrusion process, the plasticized or melted material gets the product shape; any form can be produced. The packaging should convince not only in forms and functions, but also throughout the aesthetics relating to the specific brand. The product design is the sum of these parameters.