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Synthesis of Highly Selective Zeolite Topology Molecular Sieve Using Third Foaming Method

WEI Lin,CHEN Yun-lin,ZHANG Bao-ping,ZU Zhi-nan(School of Science,Beijing Jiaotong University,Beijing 100044,China)  
Shangdong fly ash(FA_1),Fangshan fly ash(FA_2) and Heilongjiang fly ash(FA_3) were selected as the raw materials to be used for synthesis of highly selective zeolite topology molecular sieve.The crystal transformation and particles reunion were studied in terms of synthetic zeolite by third foaming method.The experimental products were characterized by means of X-ray fluorescence(XRF),scanning electron microscope(SEM),and X-ray diffraction(XRD).The result indicated that the condition of modification experiment is FA_1 processed by 10 mol/L NaOH,crystallization temperature and time are 140 °C and 8 h,respectively.With Si/Al of 7.9,zeolite topology molecular sieve is prepared,and the adsorption ratio is 63.72% for benzene gas.
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