Application of Alumina powder recovered from aluminum cans waste as a catalyst for the dehydration of 2-butanol to trans-2-butene
Hussien, B.M., Abdelkader, A., Fawzy, E.M., Ibrahim, A.A.
In the present study, alumina powder was recovered from aluminum cans waste. Sodium aluminate solution was first prepared by dissolving aluminum cans in NaOH solution and then, H2O2 solution was added to precipitate boehmite which is then calcined at 500°C in static air for 2 hours. The prepared alumina was characterized by means of X-ray diffraction (XRD). Surface acidity of alumina was measured by adsorption of pyridine followed by desorption measurements using thermogravimetry (TG) and diffrential scanning calorimetry (DSC) techniques. Catalytic activity of the alumina towards the dehydration of 2-butanol (to trans-2-butene) was studied in a fixed bed reactor at different temperatures. The effect of different reaction kinetic parameters such as reaction temperature, catalyst weight and concentration of 2-butanol in the reaction feed on the catalytic activity and product selectivity was investigated. For comparison reasons, commercial γ-Al2O3 sample was tested for the same catalytic reaction under the same reaction conditions. Results showed that the prepared alumina sample exhibited a good stability with activity of about 85% of the activity of commercial γ-Al2O3 sample under the same reaction conditions.