Author/Authors :
madzaki, hazimah universiti putra malaysia - faculty of engineering, sustainable process engineering research centre - department of chemical and environmental engineering, Serdang, Malaysia , wan ab karim ghani, wan azlina universiti putra malaysia - faculty of engineering, sustainable process engineering research centre - department of chemical and environmental engineering, Serdang, Malaysia , yaw, thomas choong shean universiti putra malaysia - faculty of engineering, sustainable process engineering research centre - department of chemical and environmental engineering, Serdang, Malaysia , rashid, umer universiti putra malaysia - institute of advance technology (itma), Serdang, Malaysia , rashid, umer tnb research sdn. bhd., Malaysia
Abstract :
Activated carbon (AC) has been used widely as an agent for carbon dioxide (CO_2) adsorption due to its environmentally friendly nature, low cost, high porous structure, high surface area and good mechanical properties. Modifications have been made to AC in order to enhance its adsorptive properties. In this study, the performance of activated carbon modified by hydrothermal treatment and impregnation techniques was compared using metal oxides. The prepared samples were characterized by different techniques using X-ray diffraction (XRD) and scanning electron microscopy (SEM). The adsorption of CO_2 was investigated using a CO_2 adsorption unit, whereby 20% of CO_2 gas was passed through the samples until a breakthrough point was achieved. During the adsorption study, it was found that AC that had been hydrothermally treated with cerium oxide (CeO_2) had the highest adsorption capacity of 0.856 mmol/g with a breakthrough time of 19.33 min.
Keywords :
Activated carbon , carbon dioxide , hydrothermal , impregnation , metal oxides
