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2005
DOI: 10.1016/j.fuel.2004.08.012
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Synthesis of zeolite from coal fly ashes with different silica–alumina composition

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Cited by 273 publications
(115 citation statements)
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“…The higher SSA of HC-Z may be mainly attributed to the formation of rough surface. The previous studies showed that the type and the yield of synthesized zeoltie depended strongly on the silica-alumina composition of the fly ash source [20]. However, our studies show that the calcium content in starting fly ash should be also considered during the synthesis of the zeolite.…”
Section: Adsorbentmentioning
confidence: 60%
See 1 more Smart Citation
“…The higher SSA of HC-Z may be mainly attributed to the formation of rough surface. The previous studies showed that the type and the yield of synthesized zeoltie depended strongly on the silica-alumina composition of the fly ash source [20]. However, our studies show that the calcium content in starting fly ash should be also considered during the synthesis of the zeolite.…”
Section: Adsorbentmentioning
confidence: 60%
“…On the other hand, in the XRD pattern of HC-Z, the major crystalline phase was identified as gismondine. The typical unit cell formula of faujasite is given as Na 20 Morphological analyses in Fig. 4 showed that, after alkaline fusion followed by hydrothermal treatment, the spheres of LC-F were deformed, and the smooth surface changed into various crystals shapes (Fig.…”
Section: Synthesized Zeolitesmentioning
confidence: 99%
“…Z tego też powodu proces adsorpcji jest atrakcyjną alternatywą wykorzystania lotnego popiołu węglowego w usuwaniu metali ciężkich ze ścieków przemysło-wych [11][12][13]. Popiół lotny jest złożony z minerałów, takich jak: kwarc, mulit, podrzędnie z hematytu i magnetytu, węgla oraz powszechnie z amorficznego glinokrzemianu [14][15][16][17][18].…”
Section: Wstępunclassified
“…It is well known that NaOH could dissolve Si and Al contained in the ash, and the dissolution is enhanced with the increase of NaOH/ash ratio. Since the solubility of Al 2 O 3 into the alkaline solution is lower than that of SiO 2 , thus a high NaOH/ash ratio result in a low SiO 2 /Al 2 O 3 ratio, which could improve the formation of zeolite HS, because zeolite HS generally contains higher amount of Al than zeolite X [18]. Fig.…”
Section: Effect Of Naoh/ash Ratiomentioning
confidence: 99%