Investigation of the Influence of Foaming Agents’ Type and Ratio on the Foaming and Reactionary Abilities of Foamed Slag Glass

Yatsenko, E. A.; Гольцман, Б. М.; Smoliy, V.A.; Kosarev, A. S.; Bezuglov, Roman

doi:10.13005/bbra/2242

Cited by 16 publications

(7 citation statements)

References 12 publications

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“…Use of organic pore forming agent (glycerin) allows to reach uniform distribution of pore forming agent through the whole charge volume and, respectively, to obtain more homogenous porous structure. The foaming mechanism of foam glass passes according to the reactions (2) and (3) [18][19][20]:…”

Section: Resultsmentioning

confidence: 99%

The problems of protection and heat insulation of steel tanks which are used in hydrogen power engineering

Yatsenko¹,

Гольцман²,

Izvarin³

et al. 2023

cisisr

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The trends in the development of hydrogen power engineering as an alternative environmentally friendly source of energy are given. The problems of hydrogen storage in steel spherical tanks, mainly related to the thermal insulation of the tank, are considered. The structure of steel spherical tanks for storing liquid hydrogen at low temperatures, which, as a rule, is 21 K, the hydrogen condensation temperature, is considered. The characteristics of AISI 316L austenitic stainless steel, developed on the basis of the AISI 304 steel grade, improved by 2.5 % molybdenum addition, which increases its corrosion resistance and allows the use of AISI 316L steel in aggressive environments, and therefore found the widest application in the design of spherical hydrogen tanks, are presented. The chemical composition of AISI 316L austenitic stainless steel is displayed. A number of heat-insulating materials for hydrogen storage in steel spherical tanks are considered. The characteristics of the expanded pearlite currently used for this purpose, which has a number of disadvantages, such as caking of the material, high costs in its production, loss of thermal insulation properties after a certain cycle of thawing -freezing, are shown. The parameters of alternative heat-insulating materials, such as aerogels, polystyrene foam, foam glass, are examined. It has been established that aerogels, despite all their advantages, are not stable in an oxygen environment and are a very expensive as material; expanded polystyrene, being an organic substance, is a subject to flammability, and therefore is not suitable for use in hydrogen energy. Foam glass was identified as the most promising heat-insulating material, which has a number of advantages over other materials. Compositions of charge for obtaining foam glass have been developed, and a series of samples of foam material has been synthesized. The optimal composition of foam glass was chosen, which is most suitable for storing hydrogen in steel spherical tanks.

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Section: Resultsmentioning

confidence: 99%

The problems of protection and heat insulation of steel tanks which are used in hydrogen power engineering

Yatsenko¹,

Гольцман²,

Izvarin³

et al. 2023

cisisr

View full text Add to dashboard Cite

show abstract

“…Low efficiency of redox foaming agents was described for the preparation of foam glass from mixtures with high diatomite content in earlier works [17]. In the study of silicate raw materials foaming methods, it was found that neutralization foaming agents [18][19] can also be used. In addition, there are foaming methods atypical for foam glass and associated with foaming using water vapor.…”

Section: Resultsmentioning

confidence: 99%

Production of Foam Glass Materials from Silicate Raw Materials by Hydrate Mechanism

Гольцман

Yatsenko

Goltsman

2020

SSP

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The ways of external protection of oil pipelines, their advantages and disadvantages were described. A method for protecting pipes using foam glass products, based on local raw materials, was proposed. The powder technology of the batch preparation and the hydration mechanism of foaming through the interaction of alkali and silica were chosen for this study, based on the existing methods of foaming of silicate raw materials. Compositions of the batch were developed, their foaming was carried out in the temperature range, corresponding to the pyro-plastic state, the effectiveness of the additional introduction of foaming substances was analyzed. The macro-and microstructure of the specimen, as well as their phase composition, were studied. The optimal composition and optimum foaming temperature for the production of foam glass materials were selected.

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“…Water, waterglass (Na 2 O•2SiO 2 •nH 2 O, sodium silicate solution 75Tw), and glycerol (C 3 H 5 (OH) 3 , 98% "AR Grade Fluid") were used as additives. Preparation of the raw mixture included preliminary grinding of glass to a particle size of less than 5 mm and sequential milling in a laboratory ball mill to a particle size of less than 250 µm (passage through standard sieve No 60); adding glycerol, waterglass, and water (according to developed compositions); and mixing for 10 min to evenly distribute the components [36,38,[47][48][49].…”

Section: Methodsmentioning

confidence: 99%

“…It is also possible to use various organic substances (sugar, starch, glycerol, etc.) [12,17,[35][36][37][38]. In addition, carbides and nitrides of elements of III and IV groups and even oxides of rare earth metals are used as such foaming agents (Ni 2 O 3 , CeO 2 ) [39][40][41][42].…”

Section: Introductionmentioning

confidence: 99%

Role of Carbon Phase in the Formation of Foam Glass Porous Structure

Гольцман

Yatsenko

2022

Materials

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The production of durable, non-combustible, heat-insulating materials is currently very important. One of the most promising materials is foam glass. Modern enterprises widely use organic foaming agents in foam glass production. The purpose of this work is to study the role of the carbon phase formed during the organic foaming agent’s (glycerol) thermal destruction in the processes of glass mass foaming. The samples were synthesized using the powder method with high-temperature treatment. Different ratios of glycerol and waterglass in a foaming mixture showed that amount of glycerol should be less than in waterglass. Otherwise, the amount is excessive and the glycerol burns out. It was shown that the quantitative description of the carbon phase structure and properties is complicated by its nanometer size and fusion into the glass. Theoretical calculations demonstrate that carbon particle size cannot be greater than 535 nm. Using a set of methods, it was proved that the carbon phase is represented by nanometer particles of amorphous sp2-carbon. Therefore, the foaming mechanism includes nanoparticles settling and immersing into the glass surface, a reaction of carbon with the sulfate ions from glass with a release of gases. Conclusions on foaming intensification via using sulfur additions and other organic foaming agents were drawn.

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Investigation of the Influence of Foaming Agents’ Type and Ratio on the Foaming and Reactionary Abilities of Foamed Slag Glass

Cited by 16 publications

References 12 publications

The problems of protection and heat insulation of steel tanks which are used in hydrogen power engineering

The problems of protection and heat insulation of steel tanks which are used in hydrogen power engineering

Production of Foam Glass Materials from Silicate Raw Materials by Hydrate Mechanism

Role of Carbon Phase in the Formation of Foam Glass Porous Structure

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