Utilization of sugarcane bagasse as a co-catalyst with potassium iodide for CO2 conversion to cyclic carbonate

Abstract

In this research, the utilization of lignocellulose dewaxed sugarcane bagasse (D-SCB) as a new cooperative catalyst with potassium iodide (KI) in cycloaddition reaction of 1, 2-butylene oxide (BO) with CO2 to formed 1,2-butylene carbonate (BC) was studied under free-solvent. The effects of reaction temperature, CO2 pressure, reaction time, and amount of water (hydroxyl group) were investigated and the suitable conditions for cycloaddition reaction. Also, the efficiency of biomass structure after fractionation, lignin and cellulose, along with potassium iodide (KI) were also considered in cycloaddition reaction of 1, 2-butylene oxide (BO) with CO2 to formed 1,2-butylene carbonate (BC). According to the results, this catalytic system exhibited excellent cycloaddition activities since the immense hydroxyl groups in dewaxed sugarcane bagasse are able to coordinate with oxygen atoms of epoxide and activate ring opening of epoxide through hydrogen bonding. The suitable operating conditions for cycloaddition reaction to achieve high 1, 2-butylene carbonate yield are 120 °C, 20 bar CO2 pressure, and reaction time 6 h.