1. Rada Petrovic, Faculty of Technology Banja Luka,
Republic of Srpska, Bosnia and Herzegovina
2. Jelena Penavin-Škundrić, Prirodno-matematički fakultet Banja Luka,
Republic of Srpska, Bosnia and Herzegovina
3. Branko Škundrić, Akademija nauka i umjetnosti Republike Srpske,
Republic of Srpska, Bosnia and Herzegovina
4. Zorica Levi, Faculty of Technology Banja Luka,
Republic of Srpska, Bosnia and Herzegovina
5. Dragica Lazić,
Republic of Srpska, Bosnia and Herzegovina
6. Darko Bodroža,
Republic of Srpska, Bosnia and Herzegovina
7. Gordana Ostojic,
Republic of Srpska, Bosnia and Herzegovina
Abstract: The paper examined microporous structure of ZSM-5 zeoliteand its cation modified forms: Fe-ZSM-5, Cu-ZSM-5, Co-ZSM-5, Mn-ZSM-5 and Ni-ZSM-5 zeoliteby the adsorption of nitrogen at 77 K. Specific surface (SP) of the mentioned ZSM-5 zeolites was determined by the use of BET-equation (SPBET) and Langmuir equation (SPLANG), while „t-method“ was used for determining the outer specific surface (SPext) and for estimating the volume of micropores (Vμpt). Dubinin Radushkevich equation (VμpDR) was also used for estimating the volume of micropores. It was established that the presence of: Fe2+, Cu2+, Co2+, Mn2+and Ni2+ ions in the structure of ZSM-5 zeolite results in a minor increase of the specific surface (SPBET) and a minor decrease of the outer specific surface (SPext).
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