Ceramic Substrates for Filtration Membranes Based on Fine Fly Ash Microspheres

IF 2 Q4 CHEMISTRY, PHYSICAL

Membranes and Membrane Technologies Pub Date : 2024-05-09 DOI:10.1134/S2517751624020033

E. V. Fomenko, G. V. Akimochkina, A. G. Anshits, N. P. Fadeeva, I. A. Kharchenko, E. V. Elsuf’ev, K. A. Shabanova, A. A. Maksimova, I. I. Ryzhkov

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Abstract

A procedure has been proposed for producing ceramic substrates for filtration membranes based on a narrow fraction of fine fly ash microspheres using cold uniaxial pressing followed by high-temperature firing. It has been shown that increasing the sintering temperature from 1000 to 1150°C leads to a decrease in open porosity from 40 to 24%, a decrease in the average pore size from 1.60 to 0.34 μm, and an increase in the compressive strength from 9.5 to 159 MPa. The resulting substrates are characterized by water permeability values of 1210, 310, 240, 170 L m⁻² h⁻¹ bar⁻¹ at sintering temperatures of 1000, 1050, 1100 and 1150°C, respectively. Experiments on filtration of aqueous suspensions of fine microspheres (d_av = 2.5 µm) and microsilica (d_av = 1.9 μm) through a substrate produced at a sintering temperature of 1150°C have shown the rejection close to 100%. The proposed methodology for using ash waste in the production of membrane materials promotes the development of technologies for the integrated processing of thermal energy waste.

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基于细粉煤灰微球的过滤膜陶瓷基板

摘要提出了一种利用单轴冷压后高温焙烧的方法生产过滤膜陶瓷基片的程序，这种基片基于窄小部分的细粉煤灰微球。研究表明，将烧结温度从 1000°C 提高到 1150°C，可使开放孔隙率从 40% 降低到 24%，平均孔径从 1.60 μm 减小到 0.34 μm，抗压强度从 9.5 MPa 提高到 159 MPa。在烧结温度为 1000、1050、1100 和 1150°C 时，所得基底的透水率分别为 1210、310、240 和 170 L m-2 h-1 bar-1。通过在 1150°C 烧结温度下生产的基质过滤细微球（dav = 2.5 µm）和微硅石（dav = 1.9 μm）的水悬浮液的实验表明，其排斥率接近 100%。所提出的利用灰烬废料生产膜材料的方法促进了热能废料综合处理技术的发展。

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来源期刊

Membranes and Membrane Technologies Multiple-

CiteScore

3.10

自引率

31.20%

发文量

期刊介绍： The journal Membranes and Membrane Technologies publishes original research articles and reviews devoted to scientific research and technological advancements in the field of membranes and membrane technologies, including the following main topics:novel membrane materials and creation of highly efficient polymeric and inorganic membranes;hybrid membranes, nanocomposites, and nanostructured membranes;aqueous and nonaqueous filtration processes (micro-, ultra-, and nanofiltration; reverse osmosis);gas separation;electromembrane processes and fuel cells;membrane pervaporation and membrane distillation;membrane catalysis and membrane reactors;water desalination and wastewater treatment;hybrid membrane processes;membrane sensors;membrane extraction and membrane emulsification;mathematical simulation of porous structures and membrane separation processes;membrane characterization;membrane technologies in industry (energy, mineral extraction, pharmaceutics and medicine, chemistry and petroleum chemistry, food industry, and others);membranes and protection of environment (“green chemistry”).The journal has been published in Russian already for several years, English translations of the content used to be integrated in the journal Petroleum Chemistry. This journal is a split off with additional topics.