Abstract
In this work, the effect of temperature on the texture of silica gel waste is presented and water vapour adsorption in a different humidity is highlighted. It was found that silica gel waste is a mesoporous material with the parallel plates pores. Its specific surface area is equal to 4.61 m2 g−1, and the calculated total pore volume is equal to 9.01 × 10−3 cm3 g−1. The texture of silica gel waste changed during calcination in a 188–550 °C temperature interval: SBET and ΣVP increased to 11.32 m2 g−1 and 30.06 × 10−3 cm3 g−1, respectively. It was determined that the water vapour pressure influenced the mineralogical composition and the quantity of adsorbed water in the samples. The obtained results were confirmed by the differential scanning microcalorimetry, X-ray diffraction, BET and water vapour adsorption analysis data.
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