A statistical approach to control porosity in silica-doped alumina supports

摘要: Abstract A split-plot statistical design was used to identify and systematically study the effects of synthesis variables on pore properties silica-doped alumina (SDA) from data obtained for 96 samples. Seven preparation (mixing method, time, environment; calcination ramp rate; drying temperature, alcohol concentration) were found alter surface area, volume, diameter over wide ranges, i.e. factors 1.8, 1.4, 3.3, respectively. Large diameters (>40 nm) by addition excess alcohol. volumes (>2 cm3/g) before at 100 °C 24 h. High area (>400 m2/g) when no used. The gamma phase all SDA samples thermally stable 1200 °C. Using analysis experimental data, models developed which predict quantitatively relationship between (surface volume diameters) parameters. Based these models, optimal conditions produce with large (40–60 nm) or medium (16–19 nm) diameters, high (>250 m2/g) (>1 cm3/g) are predicted. Model predictions accurately confirmed follow-up experiments. chemistry underlying is also addressed.