Physical Activation of Oil Palm Empty Fruit Bunch via CO2 Activation Gas for CO2 Adsorption

29th Symposium of Malaysian Chemical Engineers 2016

Joseph, C.G.^1 ; Quek, K.S.^1 ; Daud, W.M.A.W.^2 ; Moh, P.Y.^1

Faculty of Science and Natural Resources, Universiti Malaysia Sabah, Sabah, Kota Kinabalu

88400, Malaysia^1

Department of Chemical Engineering, Faculty of Engineering, University of Malaya, Kuala Lumpur

50603, Malaysia^2

关键词: Activation temperatures;    CO2 activation;    CO2 adsorption;    Oil palm empty fruit bunch;    Oil palm empty fruit bunch (OPEFB);    Physical activation;    Surface area;    TPD analysis;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/206/1/012003/pdf
DOI  :  10.1088/1757-899X/206/1/012003

来源: IOP

【 摘 要 】

In this study, different parameters for the preparation of activated carbon were investigated for their yield and CO2capture capabilities. The activated carbon was prepared from Oil Palm Empty Fruit Bunch (OPEFB) via a 2-step physical activation process. The OPEFB was pyrolyzed under inert conditions at 500 °C and activated via CO2. A 2-factorial design was employed and the effects of activation temperature, activation dwell time and gas flow rate on yield and CO2capture capabilities were compared and studied. The yield obtained ranged from between 20 - 26, whereby the temperature was determined to be the most significant factor in influencing CO2uptake. The CO2capture capacity was determined using Temperature Programmed Desorption (TPD) technique. The CO2uptake of EFB activated carbon achieved was between 1.85 - 2.09 mmol/g. TPD analysis has shown that the surface of AC were of basic nature. AC was found to be able to withhold the CO2up to 663°C before maximum desorption occurs. The surface area and pore size of OPEFB obtained from BET analysis is 2.17 m2g-1and 0.01 cm3g-1. After activation, both surface area and pore size increased with a maximum observed surface area and pore size of 548.07 m2g-1and 0.26 cm3g-1. Surface morphology, functional groups, pore size and surface area were analyzed using SEM, FT-IR, TPD and BET.