Surface Properties of Acidic Heterogeneous Catalysts for Benzene Alkylation - A Comparative Study
- Author Alhassan Mansur
- Co-Author Garba Abdulrashid Abubakar, Suleiman Mustapha
- DOI 10.17605/O
- Country : Nigeria
- Subject : Chemistry
Keywords : Activated Clay, Acidified/Unacidified Heterogeneous Catalysts, Alkylation, Selectivity Properties
Abstract
Preparation of cheap, active, selective, and more eco-friendly heterogeneous catalysts for alkylation of benzene with alkene has been attempted. 3 set of catalysts; acidified and unacidified CuO-MoO3/Al2O3 catalysts prepared by impregnation using suitable nitrate precursors as well as sulphuric acid-activated Shagari clay solid catalysts were calcined at 450°C for 2 h and activated (by soaking in 2M H2SO4 for 30 minutes), available techniques were employed for the characterization. The available oxides and minerals in the catalyst were revealed by the XRF and XRD profiles respectively. Presence of sulphate and alumina oxides was revealed by the FTIR analysis due to appearance of absorption bands around 1150-1170cm-1 and 850-600cm -1 respectively. The effects of reaction time and molar ratios on the selectivity, conversion and yield were determined in a fixed bed reactor using the catalysts. The alkylation results showed that the acidified catalysts were highly selective to 1-decylbenzene as low amount of side products was obtained. The product yield and conversion increased with reaction time and benzene /1-decene molar ratio while selectivity decreased with increase in benzene /1-decene molar ratio with time.
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