Sintesa Penyangga Aluminadan Hidrodesulfurisasi Dibenzothiophene (HDSDBT) dengan Katalis NiMo/γ-Al2O3

Abstract

Properties of Al2O3 support affect the performance of hydrotreating catalysts.Physico-chemical properties of -Al2O3 is influenced by source boehmite whichthe source of origin of -Al2O3 and the manufacturing conditions during thetransformation of boehmite into -Al2O3. This research aims to studying theconditions of manufacture of -Al2O3 from boehmite "catapal B" for support ofhydrotreating catalyst with a surface area of alumina about 200 m2/gram andmechanical strength about 0.5 kg/mm. Research was done by the variation ofvariables: moles ratio HNO3/AlOOH, moles ratio NH3/AlOOH, rate of drying,drying time, and calcination temperature. -Al2O3 support produced wascharacterized by XRD, TPD NH3 and mechanical strength tests. Testing -Al2O3 asa support of hydrotreating catalysts based nickel-molybdenum was done onhydrodesulfurization of dibenzothiophene (HDS DBT) reaction. The resultsshowed that the manufacturing conditions of boehmite "catapal B" to -Al2O3which gives a surface area of alumina about 200 m2/gram and mechanical strengthof about 0.5 kg/mm is having mol ratio HNO3/AlOOH = 0.022; mole ratioNH3/AlOOH = 0.21; H2O/AlOOH = 3.4 (mol/mol); drying temperature = 120 °C;the rate of drying temperature = 5 °C/min; drying time = 3 hours; calcinationtemperature = 550 °C and calcination time = 2 hours.