The effect of alumina structure on surface sites for alcohol dehydration

摘要: Abstract We have studied the effect of alumina form(-/, 5, and a), impurities, on 2-propanol dehydration activity. In a steady-state flow reactor experiment, α-alumina was approximately 1000 times less reactive (in terms moles propene formed/s/m2) than reforming grade γ-alumina. The structure transitional (γ vs δ) played smaller role Na contamination in determining alcohol For instance, δ-alumina ≈3–6 γ-alumina its activity for conversion, while Na-poisoned ≈180 reactive. number surface sites these aluminas were determined using temperature-programmed reaction (TPR) 2-propanol. It found that ≈1–2 × 1018 molecules/m2 reacted to form all independent or impurity concentration. temperature at which TPR experiment correlated inversely with peak desorption (TP) during ranged from 440 K 600 α-alumina. These results are discussed model nature alumina.