The conversion technology of fly ash into zeolites
The conversion technology of fly ash into zeolites
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DOI：
10.1007/s10098-014-0719-6
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发表时间：
2014-08-01
影响因子：
4.3
通讯作者：
Franus, Wojciech
中科院分区：
文献类型：
--
作者：
Wdowin, Magdalena;Franus, Malgorzata;Franus, Wojciech
介绍了以煤飞灰为原料合成Na-P1沸石的中试工艺。确定了适宜的合成条件(飞灰20 kg，氢氧化钠12 kg，水90 dm(3)，反应温度80A℃，反应时间36h)，得到了高纯度(81wt%)的Na-P1沸石产品。用X射线衍射仪、X射线衍射仪、扫描电子能谱仪和ASAP 2020对其化学、矿物学和织构特性进行了测定。合成的材料具有比BET表面积(88m(2)/g)C.A.比从中提取的飞灰高6倍(15米(2)/克)。结果表明，合成的沸石具有中孔特征，其孔径含量分别为：微孔(2.76%)、中孔(61.81%)和大孔(35.43%)。目前的技术/生产线是全自动化的，允许调节合成过程的条件，因此可以使用相同的设备获得不同类型的沸石材料(包括：Na-X、Linde-A和Na-P1)。
This paper presents a sub-pilot scale process of synthesis of Na-P1 zeolite from the coal fly ash. After establishing the appropriate synthesis conditions (20 kg of fly ash, 12 kg of NaOH, 90 dm(3) of water, the reaction temperature: 80 A degrees C and reaction time: 36 h), the high-purity (81 wt%) Na-P1 zeolite product was obtained. Its chemical, mineralogical, and textural properties were determined (by means of XRD, XRF, SEM-EDS and ASAP 2020). The synthesized material has a specific BET surface area (88 m(2)/g) c.a. six times higher than the fly ash from which it has been derived (15 m(2)/g). The pore-size distribution indicates a mesoporous character of the obtained zeolite, with the following pores size contents: micropores (2.76 %), mesopores (61.81 %), and macropores (35.43 %). The presented technological/production line is fully automated and allows to regulate the conditions of the synthesis process, therefore different types of zeolite materials (including: Na-X, Linde-A, and Na-P1) can be obtained using the same equipment.