CO2 adsorption using 3-triethoxysilylpropylamine (APTES)-modified commercial rice husk activated carbon

Abstract

Carbon dioxide (CO2) is one of the greenhouse gases that cause global warming. Therefore, there is a need for CO2 capture technologies in order to reduce the CO2 emissions to the atmosphere. In this study, commercial rice husk activated carbon was impregnated with 3-triethoxysilylpropylamine (APTES) to investigate the efficiency of modified activated carbon for CO2 adsorption. The modification parameters, such as the APTES concentration (2-5 wt%) and the type of solvent (water and ethanol) were also investigated. Then, the modified activated carbon was characterized by nitrogen adsorption-desorption, scanning electron microscopy and Fourier transform infrared spectroscopy. The maximum CO2 adsorption capacity was 7602 mg/g for APTES-AC with 5 wt % APTES using ethanol as solvent. This study shows that the rice husk activated carbon modified with APTES could enhance the CO2 adsorption performance due to the physisorption and chemisorption.Carbon dioxide (CO2) is one of the greenhouse gases that cause global warming. Therefore, there is a need for CO2 capture technologies in order to reduce the CO2 emissions to the atmosphere. In this study, commercial rice husk activated carbon was impregnated with 3-triethoxysilylpropylamine (APTES) to investigate the efficiency of modified activated carbon for CO2 adsorption. The modification parameters, such as the APTES concentration (2-5 wt%) and the type of solvent (water and ethanol) were also investigated. Then, the modified activated carbon was characterized by nitrogen adsorption-desorption, scanning electron microscopy and Fourier transform infrared spectroscopy. The maximum CO2 adsorption capacity was 7602 mg/g for APTES-AC with 5 wt % APTES using ethanol as solvent. This study shows that the rice husk activated carbon modified with APTES could enhance the CO2 adsorption performance due to the physisorption and chemisorption.