Wasseraufbereitung mittels Metall-Traegerkatalysatoren. Teilprojekt 1: Katalysatorpraeparation und Einsatz Abschlussbericht

During this projekt fundamental knowledge was gained about the preparation of mono- and bimetallic catalysts for nitrate reduction. These findings in combination with the results from reaction engineering tests represent a solid base to develop a technical process for nitrate removal from water. The replacement of hydrogen as reducing agent by formic acid has led to the conclusion that formic acid is much better suited for a selective nitrate reduction. In addition, due to several advantages compared to hydrogen formic acid has a great potential as reductant for other liquid-phase hydrogenation reactions. Furthermore, innovative processes to encapsulate metal catalysts for catalytic reactions were introduced and characterized. According to superior diffusivities the encapsulation of microscopic catalysts inside gel beads of poly (vinyl alcohol) (PVAL) is of great potential interest for other liquid-phase reactions. Moreover, the use of hollow fibre dialysers as a combination of encapsulation matrix for microscopic catalysts and reaction vessel was sucessfully introduced. (orig.)SIGLEAvailable from TIB Hannover: F99B737+a / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekBundesministerium fuer Bildung, Wissenschaft, Forschung und Technologie, Bonn (Germany)DEGerman