Study of the Adsorption of CdCl2 Vapor on Various Minerals Using a Drop Tube Furnace

Autor:	L. Delfosse, R. Gadiou, R. Masseron
Rok vydání:	1999
Předmět:	Flue gas Cadmium Sorbent Inorganic chemistry chemistry.chemical_element General Chemistry chemistry.chemical_compound Adsorption chemistry Chemisorption Environmental Chemistry Leaching (metallurgy) Tube furnace Calcium oxide
Zdroj:	Environmental Science & Technology. 33:3634-3640
ISSN:	1520-5851 0013-936X
DOI:	10.1021/es980771r
Popis:	Most of these studies were performed with fixed bed or thermogravimetric apparatus, and it is often difficult to correlate the results of these experiments with incineration flue gas conditions. To study more precisely the reaction between heavy metal vapor and suspended particles, the GRE laboratory has developed a drop tube furnace. With this experimental setup, it was possible to quantify the adsorption of cadmium chloride on different sorbents in conditions representative of incinerators; a dilute stream of particles was in contact with a counter current flow of metal vapors at high temperature during a few seconds. Leaching was done to quantify the physisorbed and chemisorbed fractions of the metal. Silica, alumina, alumina-silica, and calcium oxide were used, and the influence of sorbent surface area, gas temperature, and metal vapor concentration was studied. Alumina and calcium oxide were found to be more effective for cadmium capture. The leachable fraction of cadmium on each sorbent appears to be very low. This is in favor of a chemisorption mechanism. Results were correlated with Freundilch isotherms to get characteristic values of vapor chemisorption on these sorbents.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::7270ccbed315ec1d3bbb70f5d0ceb929 https://doi.org/10.1021/es980771r Zobrazit plný text záznamu