Recycling of fly ash for preparing porous mullite membrane supports with titania addition

Dong, Yingchao; Hampshire, Stuart; Zhou, Jinghong; Lin, Bin; Ji, Zhanlin; Zhang, Xiaozhen; Meng, Guangyao

doi:10.1016/j.jhazmat.2010.04.010

Cited by 103 publications

(41 citation statements)

References 36 publications

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“…5) Recently, there has been renewed interest in using waste materials. In general, there are two kinds of waste materials, agricultural waste materials such as rice husk 6) and kenaf waste, 7) and industrial waste materials such as waste fly ash, 8) paper pulp waste and glass. 9) These types of waste have been successfully used in the fabrication of porous ceramics.…”

Section: Introductionmentioning

confidence: 99%

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Preparation and characterization of porous alumina ceramics using different pore agents

Ali

Hanim

Tahir

et al. 2017

J. Ceram. Soc. Japan

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Graphite waste from primary batteries, active yeast and commercial rice husk ash have been used as pore-forming agents to fabricate porous alumina ceramics using a fugitive materials technique. The pore-forming agent ratios were between 10 to 50 wt %. The effects of the pore-forming agent ratios on the mechanical properties, the porosity and the microstructure have been investigated in this study. The results showed that through increasing the pore-forming agent ratio for graphite waste, yeast and rice husk ash, the porosity increased from 37.3 to 61.1%, 30.2 to 63.8% and 42.9 to 49.0%, respectively. The hardness also decreased from 172.6 to 38.1 HV 1 and from 160.6 to 15.0 HV 1 for porous alumina ceramics using graphite waste and yeast as pore-forming agents, respectively. However, the hardness of the porous alumina ceramics with rice husk ash as a pore-forming agent increased at 30 wt % (150.9 HV 1 ) and 50 wt % (158.9 HV 1 ). The tensile strength for porous alumina ceramics using graphite waste and yeast as pore-forming agents decreased from 24.9 to 14.3 MPa and from 26.2 to 5.4 MPa. The compressive strength decreased from 112.3 to 34.3 MPa and from 19.5 to 1.8 MPa, respectively. However, for porous alumina ceramics using rice husk ash, the tensile strength increased at 30 wt % (24.1 MPa) and 50 wt % (21.9 MPa). The compressive strength also increased at 30 wt % (69.7 MPa) and at 50% (60.1 MPa).

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Section: Introductionmentioning

confidence: 99%

“…Dasgupta and Kumar Das 9) have used paper pulp waste as a new source to fabricate porous ceramic composites. While, Donga et al 8) have reported on the use of porous mullite ceramic membrane supports prepared from fly ash as an industrial waste. Also, many researchers have used the agricultural waste to fabricate porous ceramic composites.…”

Section: Introductionmentioning

confidence: 99%

Preparation and characterization of porous alumina ceramics using different pore agents

Ali

Hanim

Tahir

et al. 2017

J. Ceram. Soc. Japan

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“…In this work, novel microfiltration (MF) ceramic composite membranes, made of thinner active layer supported on a porous support, have been prepared. Inorganic membranes are gaining a lot of interest in the recent years, thanks to the development of new types of inorganic membranes [28][29][30][31][32][33][34][35][36][37]. The inorganic membranes have excellent high thermal, chemical stability, mechanical resistance [8,13,[38][39][40][41][42][43], a longer life-time, ease of cleaning, a low thermal conductivity and a low dielectric constant [43,44].…”

Section: Introductionmentioning

confidence: 99%

Development and characterization of tubular composite ceramic membranes using natural alumino-silicates for microfiltration applications

Ghouil

Harabi

Bouzerara

et al. 2015

Materials Characterization

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The preparation and characterization of porous tubular ceramic composite microfiltration membranes, using kaolins and calcium carbonates, were reported. The porous gehlenite (2CaO·Al 2 O 3 ·SiO 2 ) and anorthite (CaO·Al 2 O 3 ·2SiO 2 ) based ceramics were obtained by a solid state reaction. A ceramic support, sintered at 1250°C, within an average pore size of about 8 μm, a porosity of about 47% and a compression strength around 40 MPa, was prepared. The microfiltration active top layer was added on the support by a slip casting from clay powder suspensions. The novel microfiltration membrane layer has a thickness of 40 μm and an APS value of about 0.2 μm. This average pore size value was improved and considerably lower than those reported in the literature (0.5 μm). The performance of the novel microfiltration ceramic membrane was determined for evaluating both the water permeability and rejection. This proved the potentiality of the membrane produced in the microfiltration field. Moreover, the good adhesion, between the support and the active microfiltration layer membranes, was also proved. A correlation between microstructures of used powders and physicochemical properties was discussed. Finally, the origin of the unique two powder order membrane depositions was also proposed.

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“…10,11 Recently a study has been made on the conversion of coal fly ash to mullite (3Al 2 O 3 ·2SiO 2 ) for the preparation porous ceramic membranes. 12 As a structural material, porous mineral-based mullite is expected to be a promising candidate for ceramic membrane supports especially because of its excellent high temperature resistance, good corrosion resistance, abundant natural Al and Si-sources, low cost, and environment friendliness. 13 These properties are especially important for porous mullite, which is used as filter membrane for treatment of great volumes of liquid/gas effluents, which requires the use of porous support with higher porosity and good mechanical strength in order to maintain a lower pressure drop across the filter membrane and to withstand the pressure gradient imposed during practical separation applications.…”

Section: Introductionmentioning

confidence: 99%

Waste-to-resource preparation of a porous ceramic membrane support featuring elongated mullite whiskers with enhanced porosity and permeance

Zhu

Dong

Hampshire

et al. 2015

Journal of the European Ceramic Society

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Recycling of fly ash for preparing porous mullite membrane supports with titania addition

Cited by 103 publications

References 36 publications

Preparation and characterization of porous alumina ceramics using different pore agents

Preparation and characterization of porous alumina ceramics using different pore agents

Development and characterization of tubular composite ceramic membranes using natural alumino-silicates for microfiltration applications

Waste-to-resource preparation of a porous ceramic membrane support featuring elongated mullite whiskers with enhanced porosity and permeance

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