Synthesis of highly selective zeolite topology molecular sieve for adsorption of benzene gas

Shangdong fly ash (SFA), Fangshan fly ash (FFA) and Heilongjiang fly ash (HFA) were selected as the raw materials to be used for synthesis of highly selective zeolite topology molecular sieve. Twice foaming method was studied in terms of synthetic zeolite. The experimental products were characterized by means of X-ray fluorescence (XRF), scanning electron microscope (SEM), X-ray diffraction (XRD), and automated surface area & pore size analyser. The results indicated that 10 M NaOH was chosen as modification experiment condition to process SFA. Crystallization temperature and time were 140 degrees C and 8 h, respectively. Zeolite topology molecular sieve was prepared with Si/AI molar ratio of 7.9, and its adsorption ratio of benzene gas was up to 66.51%. (C) 2012 Elsevier Masson SAS. All rights reserved.