Feasible recycling of industrial waste coal fly ash for preparation of anorthite-cordierite based porous ceramic membrane supports with addition of dolomite

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• 作者：Jing Liu^a ; ^b ; ^c ; Yingchao Dong^a ; ^b ; ^{ycdong@iue.ac.cn" class="auth_mail" title="E-mail the corresponding author} ; ^{dongyc9@mail.ustc.edu.cn" class="auth_mail" title="E-mail the corresponding author} ; Xinfa Dong^c ; Stuart Hampshire^d ; Li Zhu^a ; ^b ; Zhiwen Zhu^a ; ^b ; Lingling Li^a ; ^b ; ^c
• 关键词：Coal fly ash ; Dolomite ; Ceramic membrane ; Membrane support ; Anorthite ; Cordierite
• 刊名：Journal of the European Ceramic Society
• 出版年：2016
• 出版时间：March 2016
• 年：2016
• 卷：36
• 期：4
• 页码：1059-1071
• 全文大小：5321 K

文摘

Recycling of industrial solid state waste is always the priority solution in the prospect of waste management. This work demonstrated a new method converting coal fly ash (CFA) industrial waste to anorthite-cordierite-based porous ceramic membrane supports (ACCMS), through high-temperature sintering with additions of dolomite mineral. Characterization of as-prepared ACCMS included phase composition, microstructure, pore structure, N₂ and water permeability, and mechanical properties. From dilatometric measurements, the densification temperature of a sample with 28.43 wt.% dolomite addition was extended to 1100 °C compared to 1060 °C for that of a sample without any dolomite. For samples sintered at 1150 °C, their open porosity increased from 25.2 ± 0.5% to 46.5 ± 0.2% when dolomite addition increased from 0 to 28.43 wt.%. It is suggested that this level of dolomite addition significantly inhibited the sintering behavior of CFA.