Foam glass using sodium hydroxide as foaming agent: Study on the reaction mechanism in soda-lime glass matrix

Silva, Robson Couto da; Kubaski, Evaldo Toniolo; Tenório‐Neto, Ernandes T.; Lima-Tenório, Michele K.; Tebcherani, S. M.

doi:10.1016/j.jnoncrysol.2019.02.003

Cited by 56 publications

(29 citation statements)

References 44 publications

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“…The volumetric expansion and loss of weight of the cellular solids were calculated according to Equations (4) and (5).…”

Section: Ceramic Foams Characterizationmentioning

confidence: 99%

“…The glass-ceramic foams obtained from these raw material sources present a wide range of characteristic properties. According to the literature, foams prepared using different proportions of waste-glass and other several components present mean cell dimensions of 0.25-2.00 mm, porosities of 60%-86%, and apparent densities of 0.13-0.8 g/cm 3 [5,6,[19][20][21]. Foams prepared using different proportions of fly ash and several other components present mean cell dimensions of 0.2-3 mm, porosities of 35%-78%, and apparent densities of 0.14-1.37 g/cm 3 [22][23][24][25][26].…”

Section: Effect Of the Powder MIX Composition And Temperaturementioning

confidence: 99%

“…These ceramic foams have a wide range of applications, especially for high temperatures and corrosive environments, such as separation process (filtration), thermal insulation, and support for catalysis reactions, due to their unique properties such as low densities, low thermal conductivity, thermal-shock resistance, and excellent dielectric properties [5]. However, their use has been limited to industrial applications because of the high cost of production associated with the high energy consumption and the elevated price of raw materials [6].…”

Section: Introductionmentioning

confidence: 99%

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Effect of the Operational Conditions in the Characteristics of Ceramic Foams Obtained from Quartz and Sodium Silicate

2020

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Ceramic foams were fabricated without using melting pots through the direct foaming of compacted powder mixtures of commercial quartz (SiO2) with fluxing agents (Na2CO3 and CaO) and a foaming agent (Na2SiO3·5H2O) at a relatively low temperature range (850−870 °C). The effects of the pressing pressure of the powders, the foaming time, foaming temperature, and mixture content were evaluated. The obtained cellular solid materials presented an acceptable volumetric expansion at a pressing pressure of 4 t. The materials only presented porosity at a minimum temperature of 850 °C and at a minimum time of 30 min. All the foamed samples showed an acceptable symmetric expansion and non-appreciable fissures. The study of the mixture content through the statistical software MODDE® shows that the porosity of the samples was principally affected by the Na2SiO3 content and the foaming temperature. The samples obtained at the optimum controlling factors proposed by this statistical software presented an apparent density, porosity, and mechanical strength of 1.09 ± 0.03 g/cm3, 56.01% ± 1.12%, and 3.90 ± 0.16 MPa, respectively. Glass and ceramics foams such as those obtained in this work become attractive as insulation materials in applications where high temperatures occur due to their higher melting points.

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“…The volumetric expansion and loss of weight of the cellular solids were calculated according to Equations (4) and (5).…”

Section: Ceramic Foams Characterizationmentioning

confidence: 99%

Section: Effect Of the Powder MIX Composition And Temperaturementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Effect of the Operational Conditions in the Characteristics of Ceramic Foams Obtained from Quartz and Sodium Silicate

2020

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“…Research herein describes an innovative, photocatalytic sol-gel matrix technology that creates a stabilized porous granular media through the utilization of sodium hydroxide, a known foaming agent [41], during solvent extraction. Sodium hydroxide pore infiltration followed by subsequent foaming during firing, aids in retention of the sol-gel networked structure.…”

Section: Introductionmentioning

confidence: 99%

Photocatalytic Porous Silica-Based Granular Media for Organic Pollutant Degradation in Industrial Waste-Streams

McIntyre

Hart

2021

Catalysts

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Photocatalytic treatment of organic contaminants in industrial wastewaters has gained interest due to their potential for effective degradation. However, photocatalytic slurry reactors are hindered by solution turbidity, dissolved salt content, and absorbance of light. Research presented here introduces the development and application of a novel, photocatalytic, porous silica-based granular media (SGM). SGM retains the cross-linked structure developed during synthesis through a combination of foaming agent addition and activation temperature. The resultant media has a high porosity of 88%, with a specific surface area of ~150 m2/gram. Photocatalytic capabilities are further enhanced as the resultant structure fixes the photocatalyst within the translucent matrix. SGM is capable of photocatalysis combined with diffusion of nucleophiles, electrophiles, and salts from pore space. The photocatalytic efficiencies of SGM at various silica contents were quantified in batch reactors using methylene blue destruction over time and cycles. Methylene blue concentrations of 10 mg/L were effectively degraded (>90%) within 40 minutes. This effectiveness was retained over multiple cycles and various methylene blue concentrations. SGM is a passive and cost-effective granular treatment system technology which can translate to other organic contaminants and industrial processes.

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“…1,2 Recycled glass-based scrap can greatly reduce the energy and raw material required to produce new materials, such as glass foams (GF). [3][4][5][6][7] The production of this material is an economically attractive alternative for glass recycling. 6,7 GF are highly porous materials produced by the addition of a foaming agent (FA) to the glass powder followed by a heat treatment for gas release by the FA to enable the pores formation throughout the vitreous matrix.…”

mentioning

confidence: 99%

Influence of processing parameters on the microstructure of the eco‐friendly glass foam

Rangel

Machado

Osório

et al. 2021

Int J Applied Ceramic Tech

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Among the several e-waste (electronic and electrical waste) generated, one of the most worrisome are those derived from fluorescent lamps. 1 Although these lamps class are one of the most popular sources of light, its recycling is still marginal. 1,2 Recycled glass-based scrap can greatly reduce the energy and raw material required to produce new materials, such as glass foams (GF). [3][4][5][6][7] The production of this material is an economically attractive alternative for glass recycling. 6,7 GF are highly porous materials produced by the addition of a foaming agent (FA) to the glass powder followed by a heat treatment for gas release by the FA to enable the pores formation throughout the vitreous matrix. 4,5,8 The low thermal conductivity, dimensional stability, low bulk density, non-flammable, and higher operating temperatures than

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Foam glass using sodium hydroxide as foaming agent: Study on the reaction mechanism in soda-lime glass matrix

Cited by 56 publications

References 44 publications

Effect of the Operational Conditions in the Characteristics of Ceramic Foams Obtained from Quartz and Sodium Silicate

Effect of the Operational Conditions in the Characteristics of Ceramic Foams Obtained from Quartz and Sodium Silicate

Photocatalytic Porous Silica-Based Granular Media for Organic Pollutant Degradation in Industrial Waste-Streams

Influence of processing parameters on the microstructure of the eco‐friendly glass foam

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