Zeolite in the Chemical Industry
zeolite as a means of ammonium recovery and secondary processing of cheese whey. [Study]
A study by the University of Patras, which investigated the effectiveness of natural zeolite in removing ammonium ions from synthetic wastewater and from whey.
Zeolite as a Potential Medium for Ammonium Recovery and Second Cheese Whey Treatment
The efficiency of natural zeolite to remove ammonium from artificial wastewater (ammonium aqueous solutions) and to treat second cheese whey was examined, aiming to recover nitrogen nutrients that can be used for further applications, such as slow-release fertilizers. Sorption experiments were performed using artificial wastewater and zeolite of different granulometries (i.e., 0.71–1.0, 1.8–2.0, 2.0–2.8, 2.8–4.0, and 4.0–5.0 mm). The granulometry of the zeolite had no significant effect on its ability to absorb ammonium. Nevertheless, smaller particles (0.71–1.0 mm) exhibited quicker NH4+-N adsorption rates of up to 93.0% in the first 10 min. Zeolite as a Potential Medium for Ammonium Recovery ... Read more
Silver Zeolite Composites-Based LEDs: A Novel Solid-State Lighting Approach [Thesis]
Silver Zeolite Composites-Based LEDs: A Novel Solid-State Lighting Approach Abstract Silver clusters incorporated in a zeolite matrix represent a promising alternative for rare earth phosphors, organic dyes, and quantum dots as emitters in organic and hybrid organic/inorganic light-emitting diodes (OLEDs). Compared to other existing types of emitters, they combine an excellent stability to oxygen and humidity with a high luminescence quantum yield and color tunability. This study reports on the first use of these silver exchanged zeolites embedded in polyvinyl carbazole (PVK), which is expected to act as a conducting matrix, as emitters in a single-layer OLED. It is demonstrated ... Read more
Thermochemical materials and a pilot reactor for large-scale energy storage – Thermochemical materials and reactor concepts for large-scale energy storage
C.C.M. Rindt, M. Gaeini, S.Lan, D.M.J. Smeulders Eindhoven University of Technology, PO Box 513, 5600 MB Eindhoven, The Netherlands In summer, the sun provides more heat than needed to warm residential houses while in winter the heat demand cannot be met by solar energy supply. A solution is to store excess solar energy in a thermal ‘battery’ which can be discharged to meet the residential heat demand in winter. A reliable method for seasonal solar heat storage is by means of thermochemical materials (TCMs). The process is based on a reversible adsorption-desorption reaction, which is exothermic in hydration and endothermic ... Read more
27th German Zeolite Conference – 27. Deutsche Zeolith-Tagung
27th German Zeolite Conference – 27th Deutsche Zeolith-Tagung The 27th German Zeolite Conference will take place alongside the annual meeting of the Adsorption Section from 25 to 27 February 2015 on the Haarentor Campus of the Carl von Ossietzky University of Oldenburg. Organised by DECHEMA e.V., it is hosted by the Department of Technical Chemistry at the Institute of Chemistry, in collaboration with the ProcessNet specialist groups on Zeolites and Adsorption. In addition to zeolites, which historically gave this annual conference its name, the range of porous materials with defined structures has now expanded considerably. Microporous metal-organical framework compounds (crystalline coordination ... Read more