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The paper presents the usage possibility of synthetic zeolites as hydrocarbon adsorbents. To
this study two types of oils were examined: EkoDiesel plus Orlen and biodiesel B100.
Adsorbents were represented by zeolites derived by converting the fly ash. Zeolite materials
were represented by: sodalite, Na-X, Na-P1 and a mineralogical mixture of zeolites: Na- P1/Na-X/Linde-A (ZR), that results from the conversion of fly ash in hydrothermal conditions. They were derived using the technological line for the synthesis of zeolite materials. For the experiment a natural clinoptilolite was also used. To activate the sorption properties of tested materials, the zeolitic mixture ZR was calcined at temperatures of 200 °C to 600 °C for a period of 6 hours. Derived materials were analyzed by XRD and textual studies to determine the effect of activation on the sorption properties with respect to petroleum substances.For activation conditions up to temperature 400 °C and activation time 6h, all adsorption properties of the ZR material are increasing. BET surface area for the starting material is 116 m2 g-1 for activated reaches up to 163 m2 g-1. Other textural characteristics of the ZR also show an upward trend (surface area of micropores, volume and surface area of mesopores). Above temperatures 400 °C these parameters start to decrease.An activation temperature up to 400 °C causes an increase in the adsorption properties of ZR for both oils, the EkoDisel plus Orlen and biodiesel B100. Amount of adsorbed ekodisel oil was 1.48 [g/g sorbent] and for biodiesel was about 1.33 [g/g sorbent]. Study of the sorption capacity of petroleum substances were carried out by modified method of Westinghouse.The decrease of the adsorption properties above 400°C activation temperature is related to the instability of the crystal structure of the main component of the zeolite framework tested materials (mainly Na-P1). This is confirmed by the analysis of the mineral composition (XRD) of the activated materials, as well as a decrease of textural parameters.
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