By E. R. Merz (auth.), L. Cecille, S. Halaszovich (eds.)
The function of the Seminar was once to supply a world interdisciplinary discussion board for in-depth discussions at the professionals and cons of a denitration step by way of chemical capacity during solidification of MAW (medium lively waste) and HAW (highly lively waste), sooner than feeding the calciner or melter. specifically, transformations within the volatility of a few elements and aerosol formation throughout the vitrification step are of curiosity. Chemical instead of thermal denitration can have specific advantages that may simplify off-gas purification. a discount within the salt burden of waste ideas, resulting in a discount within the quantity of sturdy waste, can also be completed. The medical programme of the Seminar consisted of invited lectures merely, given by means of specialists actively engaged during this box of analysis. The emphasis used to be on huge discussions one of the individuals, with the purpose of resulting in an aim knowing of the state of the art. The assembly additionally indentified concerns and concepts for destiny research.
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0,6 0,8 Dimensionless lime. e VARIATION OF THE STOICHIOMETRIC COEFFICIENT (MOLE HCOOH/MOLE HN0 3 ' AS A FUNCTION OF THE FEEDING TIME? 27 Fig. 2 t =0 Fig. 3 t = 1 min. The mixture is turning yellow (T=200C: The mixture is colourless (T=20oC) Fig. 4 t = 3 min. Fi g. 5 greenish zone is developing near the liquid surface (T = 20°C) t = 3 min. 50 s. 4 N 28 60 ml 1,0 r-----r--~-_,--__r--_r_-___, 0,8 - d (HN03) _ f (HC l) ~- ..... , t = 0 corresponds to the end of HN0 3 feeding into boiLing HCOOH ~ 0 z :J: 0,4 in MIL 0,2 (boiLing under refLux) FIG.
Gompper Kernforschungszentrum Karlsruhe GmbH Institut fUr Nuk1eare Entsorgungstechnik Summary Besides formic acid and formaldehyde several organic reagents are used to decompose nitric acid. Denitration by use of sugar was first carried out at HANFORD, USA. More than 12 moles nitric acid can be decomposed per mole sucrose. The decomposition is 1inerar1y dependent on the concentration of sugar and the presence of iron increases the reaction rate. On account of the slow reaction, which does not give rise to foaming, a simple uncomplicated design of reaction vessels is possible.
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