Naslov
Citric acid as a modifier of blast furnace sludge

Autori
Rađenović, Ankica ; Malina, Jadranka ; Slokar, Ljerka

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
Croatian Microscopy Symposium-Book of Abstracts / Gajović, Andreja ; Tomašić, Nenad - Zagreb : Hrvatsko mikroskopijsko društvo, 2012, 97-98

ISBN
978-953-57138-1-4

Skup
Croatian Microscopy Symposium

Mjesto i datum
Pula, Hrvatska, 16.11.2012. - 17.11.2012

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
blast furnace sludge; surface modification; citric acid

Sažetak
In this work, the influence of citric acid (CA) on the surface modification of blast furnace sludge (BFS) was examined. The sample of original BFS, provided by a Croatian Iron & Steelmaking Company, was dried at 105 °C for 4 hours to yield a powder of a particle diameter less than 0.1 mm. Examined sample dominated by amorphous phase ( >75 %) ; consists mainly of carbon (31.74%) and metal carbonates and oxides. Surface area properties (specific surface area, average pore diameter, total pore volume) are determined by the Brunauer-Emmett-Teller (BET) and Barrett-Joyner-Halenda (BJH) method. Before analyse, the BFS samples were heated at a temperature of 50°C and evacuated under 666.5∙10-3 Pa pressure in order to remove any contaminants as well as moisture that might be present on the surface. Surface morphology of BFS samples was examined by the method of qualitative scanning electron microscopy (SEM) using Jeol JXA 50A microscope. Citric acid as a surface modifier is decreased BET surface and the average pore diameter of BFS, but increased the number of carboxylic group as the active site binding the adsorbates.

Izvorni jezik
Engleski

Znanstvena područja
Metalurgija

POVEZANOST RADA