Naslov
Natural zeolite from Krapina region, Croatia for ammonia gas sorption

Autori
Farkaš, Anamarija ; Tofant, Alenka ; Rožić, Mirela ; Tišma, Sanja

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

Izvornik
2nd International Conference on Engineering for Waste Valorisation, Proceedings, June 3-5, 2008, Patras, Greece / Prof. Gerasimos Lyberatos i prof. Ange Nzihou - Patras : University of Patras, 2008, 242-243

Skup
2nd International Conference on Engineering for Waste Valorisation, Proceedings, June 3-5, 2008, Patras, Greece

Mjesto i datum
Patras, Grčka, 03.06.2008. - 05.06.2008

Vrsta sudjelovanja
Ostalo

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
natural zeolite ; ammonia adsorption

Sažetak
The paper investigates the possibility of ammonia sorption from air by using natural zeolite (clinoptilolite) from sedimentary ore from the area of Donje Jesenje, Krapina, Croatia. Ammonia sorption on unmodified and modified zeolite samples was established at different initial concentrations of NH3. Natural exchanger was activated with NaCl, KCl, CaCl2 and MgCl2 salts solutions, treatment with HCl acid and NaOH base and was thermally activated at different temperatures. Results have shown that the acid-modified zeolite sample exhibited much better ammonia sorption capacity compared to natural zeolite. Acid treatment of zeolite increased its specific area and micropore volume, which were reduced by the basic and thermal treatments. Among the Na-form, K-form, Ca-form and Mg-form of zeolite, the best ammonia sorption was achieved with Ca- and Mg-forms.

Izvorni jezik
Engleski

Znanstvena područja
Grafička tehnologija, Kemijsko inženjerstvo

POVEZANOST RADA