Experimental investigation of thermal insulating aerogel composites of hydrothermal reactor for biomass-to-hydrogen conversion

Веденин, А. Д.; Vityaz, P. A.; Ivanova, Irina; Mazalov, Yu. A.; Pustovgar, Andrey; Судник, Л. В.

doi:10.1016/j.ijhydene.2016.11.025

Cited by 14 publications

(3 citation statements)

References 6 publications

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“…A series of one-dimensional materials in micro-scale or nano-scale are applied to strengthen aerogels while maintaining high porosity and low density, such as glass bers [7,12] , mullite bers [13] , carbon bers [14] , carbon nanotubes (CNTs) [15] . In addition, opaci ers are added to the silica aerogel matrix to suppress infrared radiation transmission to improve the poor thermal insulation property at high temperature, such as SiC powders [16][17][18] , carbon black [19] and TiO 2 powders [20] .…”

Section: Introductionmentioning

confidence: 99%

SiO2 aerogel multiscale reinforced by glass fibers and SiC nanowhiskers for thermal insulation

Yang

Chen

et al. 2023

J Porous Mater

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SiO 2 aerogel attracts much interest as thermal insulation material due to ultra-low density and excellent thermal performance at room temperature. However, the poor mechanical property and a mass of heat transfer by radiation in high temperature limit application of aerogels. Herein, a novel aerogel composites multiscale reinforced by glass bers with SiC nanowhiskers (SiC nw ) (AFW) was prepared. SiC nw were evenly distributed in glass bers felts by freezing-drying method to form a uniform multiscale felts. The SiC nw inside felts provided more contact point with aerogel to increase the interfacial adhesion force so that compressive stress of AFW with 4% volume fraction SiC nw was increased to 0.29MPa. SiC nw blocked infrared radiation to decrease the heat transfer. Therefore, Even though SiC nw raised thermal conductivity of aerogels at room temperature, thermal conductivity at 500℃ of AFW with was only 0.040 W/(m•K). In another word SiC nw reduced the sensitivity of thermal conductivity to temperature. AFW shows potential in the eld of medium and high temperature insulation.

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Section: Introductionmentioning

confidence: 99%

SiO2 aerogel multiscale reinforced by glass fibers and SiC nanowhiskers for thermal insulation

Yang

Chen

et al. 2023

J Porous Mater

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show abstract

Section: Introductionmentioning

confidence: 99%

SiO2 aerogel multiscale reinforced by glass fibers and SiC nanowhiskers for thermal insulation

Yang

Chen

et al. 2022

Preprint

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SiO2 aerogel attracts much interest as thermal insulation material due to ultra-low density and excellent thermal performance at room temperature. However, the poor mechanical property and a mass of heat transfer by radiation in high temperature limit application of aerogels. Herein, a novel aerogel composites multiscale reinforced by glass fibers with SiC nanowhiskers (SiCnw) (AFW) was prepared. SiCnw were evenly distributed in glass fibers felts by freezing-drying method to form a uniform multiscale felts. The SiCnw inside felts provided more contact point with aerogel to increase the interfacial adhesion force so that compressive stress of AFW with 4% volume fraction SiCnw was increased to 0.29MPa. SiCnw blocked infrared radiation to decrease the heat transfer. Therefore, Even though SiCnw raised thermal conductivity of aerogels at room temperature, thermal conductivity at 500℃ of AFW with was only 0.040 W/(m·K). In another word SiCnw reduced the sensitivity of thermal conductivity to temperature. AFW shows potential in the field of medium and high temperature insulation.

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“…Aerogel is considered to be the solid material with the lowest thermal conductivity [1,2,3], among which SiO 2 aerogel is studied most comprehensively and has been applied in military, aeronautic and civil uses due to its thermal conductivity that can be as low as 0.013 W/(m·K) [4,5,6,7]. However, the effect of sintering is obvious when the usage temperature is over 1073 K, which leads to a serious degradation of the heat insulation property of the material [8,9,10].…”

Section: Introductionmentioning

confidence: 99%

Preparation and Properties of SiBCO Aerogel and Its Composites

Feng

Yin³

et al. 2018

Nanomaterials

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To obtain new high-temperature resistant composites that can meet the requirements of aircraft development for thermal insulation and mechanical properties, SiBCO aerogel composites were prepared by sol-gel, supercritical drying and high-temperature pyrolysis with trimethyl borate (TMB) or phenylboronic acid (PBA) as the boron source and mullite fiber as reinforcement. The structure and composition of the SiBCO aerogel and its composites were characterized with SEM, FT-IR, ICP and nitrogen adsorption tests. The specific surface area of the SiBCO aerogel is 293.22 m2/g, and the pore size is concentrated in the range of 10–150 nm. The mechanical properties, the thermal insulation properties and the temperature resistance were also studied. Due to the introduction of boron, the temperature resistance of SiBCO aerogel composites is improved greatly, and the service temperature of composites reached 1773 K. When n (TMB)/n (TEOS) = 1/1, the temperature resistance of the composites is the best. After heating in air at 1773 K for 30 min, the shrinkage of SiBCO aerogel composites is only 2.45%, and the thermal conductivity of the composites is 0.138 W/(m·K) at 1773 K. In addition, the type and amount of catalyst also have certain effects on the mechanical properties and temperature resistance of the composites.

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Experimental investigation of thermal insulating aerogel composites of hydrothermal reactor for biomass-to-hydrogen conversion

Cited by 14 publications

References 6 publications

SiO2 aerogel multiscale reinforced by glass fibers and SiC nanowhiskers for thermal insulation

SiO2 aerogel multiscale reinforced by glass fibers and SiC nanowhiskers for thermal insulation

SiO2 aerogel multiscale reinforced by glass fibers and SiC nanowhiskers for thermal insulation

Preparation and Properties of SiBCO Aerogel and Its Composites

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