Naslov
Precipitation of Calcium Carbonate from Calcium Hydroxide and Carbonic Acid Solutions

Autori
Kralj, Damir ; Kontrec, Jasminka ; Brečević, Ljerka

Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni

Izvornik
Chemical Engineering Transactions - Volume 1: Industrial Crystallization '02 / Chianese, Angelo - Milano : Italian Association of Chemical Engineering (AIDIC), 2002, 287-291

Skup
15th International Symposium on Industrial Crystallization

Mjesto i datum
Sorrento, Italija, 15.09.2002. - 18.09.2002

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
Calcium carbonate; Calcite; Vaterite; Precipitation

Sažetak
The influence of initial reactant concentrations (c(Ca(OH)2) = 2.0ˇ10-3 – 1.0ˇ10-2 mol dm-3 and c(H2CO3) = 1.0ˇ10-3 – 1.2ˇ10-2 mol dm-3) on the composition, morphology and amount of the precipitates formed by spontaneous precipitation of calcium carbonate at 25 °C has been investigated. Precipitation of calcium carbonate was achieved by mixing equal volumes of both calcium hydroxide and carbonic acid solutions. Propagation of the reaction was followed by measuring pH of the solution in the systems continuously stirred at a constant rate. Precipitates aged for 20 min were characterized by means of a combination of optical microscopy, FT-IR spectroscopy, crystal size distribution and specific surface area measurements. The effect of initial supersaturation is discussed.

Izvorni jezik
Engleski

Znanstvena područja
Kemija

POVEZANOST RADA