粉煤灰分级对沸石化过程的影响。

Impact of fly ash fractionation on the zeolitization process.

作者信息

Czarna-Juszkiewicz Dorota, Kunecki Piotr, Panek Rafał, Madej Jarosław, Wdowin Magdalena

机构信息

Mineral and Energy Economy Research Institute, Polish Academy of Sciences, Wybickiego 7A, 31-261 Kraków, Poland.

Department of Geotechnical Engineering, Civil Engineering and Architecture Faculty, Lublin University of Technology, Nadbystrzycka 40, 20-618 Lublin, Poland.

出版信息

Materials (Basel). 2020 Feb 25;13(5):1035. doi: 10.3390/ma13051035.

DOI:10.3390/ma13051035

PMID:32106436

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7084421/

Abstract

Coal combustion product in the form of fly ash has been sieved and successfully utilised as a main substrate and a carrier of silicon and aluminium in a set of hydrothermal syntheses of zeolites. The final product was abundant in zeolite X phase (Faujasite framework). Raw fly ash as well as its derivatives, after being sieved (fractions: ≤ 63, 63-125, 125-180 and ≥ 180 µm), and the obtained zeolite materials were subjected to mineralogical characterisation using powder X-ray diffraction, energy-dispersive X-ray fluorescence, laser diffraction-based particle size analysis and scanning electron microscopy. The influence of fraction separation on the zeolitization process under hydrothermal synthesis was investigated. Analyses performed on the derived zeolite X samples revealed a meaningful impact of the given fly ash fraction on synthesis efficiency, chemistry, quality as well as physicochemical properties, while favouring a given morphological form of zeolite crystals. The obtained zeolites possess great potential for use in many areas of industry and environmental protection or engineering.

摘要

以飞灰形式存在的煤燃烧产物经过筛分，并成功用作一组沸石水热合成中的主要底物以及硅和铝的载体。最终产物富含X型沸石相（八面沸石骨架）。将原始飞灰及其衍生物筛分后（粒径范围：≤63、63 - 125、125 - 180和≥180 µm），对所得沸石材料进行粉末X射线衍射、能量色散X射线荧光、基于激光衍射的粒度分析和扫描电子显微镜等矿物学表征。研究了分馏对水热合成过程中沸石化的影响。对衍生的X型沸石样品进行的分析表明，给定的飞灰粒径对合成效率、化学组成、质量以及物理化学性质有显著影响，同时有利于形成特定形态的沸石晶体。所获得的沸石在许多工业、环境保护或工程领域具有巨大的应用潜力。