Synthesis of hydrophobic alumina aerogel with surface modification from oil shale ash

The preparation of a green shape-stabilized composite phase change material of polyethylene glycol/SiO2 with enhanced thermal performance based on oil shale ash via temperature-assisted sol–gel method

“…Therefore, it is necessary to develop new approaches to reduce the accumulation of OSA and further explore its new applications. So far, considerable efforts have been dedicated to explore the novel applications of OSA, such as the synthesis of zeolites, tobermorites, adsorbents, coagulant, alumina, and nano-silica [2,[6][7][8][9][10]. Among them, high-grade silica preparation with the waste OSA has attracted an increasing interest due to its double benefits of both resource re-generation and pollution abatement.…”

Hydrophobic catalyst support surfaces by silylation of γ-alumina for Co/Re Fischer-Tropsch synthesis

“…* A modified version of the method of Bao et al, aimed at complete substitution of the surface hydroxyl groups, was adopted. 6 Surface modification was carried out by immersing 5 g of solid sample in 100 ml of Table 1.…”

“…Chemical modification of the surface has been carried out by using different modifiers like trimethoxy methyl silane, tetraethyl orthosilicate, stearic acid and trichloro methyl silane. 5,6,7 All these modifiers have been applied for near complete substitution of the surface -OH groups to induce hydrophobicity. The modification reaction of alumina with methoxy trimethyl silane can be depicted as (AlxOy)-OHn + n CH3O-Si-Me3  (AlxOy)-(O-Si-Me3)n + n CH3OH…”

Synthesis of Monolithic Fe2O3-Al2O3Composite Aerogels via Organic Solvent Sublimation Drying

“…Its unique structure makes it have extraordinary properties like low density, large porosity, low thermal conductivity, and high specific surface area, which lead it to receive much attention in a wide range of applications [4][5][6][7][8]. In particular alumina aerogel, which provides thermal insulation over a large temperature range and large specific surface area, would be a very useful material [9][10][11][12]. In order to make it better applied to some specific areas, we need to add other special materials to improve the characteristics of alumina aerogel.…”