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CARBONLETT, vol. 24, no. 1, pp.82-89, 2017

DOI: http://dx.doi.org/:10.5714/CL.2017.24.082

Physicochemical properties and methane adsorptionperformance of activated carbon nanofibers withdifferent types of metal oxides

Faten Ermala Che Othman1, Norhaniza Yusof1,♠, Hasrinah Hasbullah1, Juhana Jaafar1, Ahmad Fauzi Ismail1 and Noor Shawal Nasri2

Affiliation: 1Advanced Membrane Technology Research Center (AMTEC), Faculty of Chemical & Energy Engineering, Universiti Teknologi Malaysia, Johor Bahru 81310, Malaysia
2UTM-MPRC of Oil and Gas Institute, Faculty of Chemical & Energy Engineering, Universiti Teknologi Malaysia, Johor Bahru 81310, Malaysia

Abstract: In this study, composite PAN-based ACNFs embedded with MgO and MnO2 were prepared by the electrospinning method. The resultant pristine ACNFs, ACNF/MgO and ACNF/MnO2 were characterized in terms of their morphological changes, SSA, crystallinity and functional group with FESEM-EDX, the BET method, XRD and FTIR analysis, respectively. Results from this study showed that the SSA of the ACNF/MgO composite (1893 m2 g-1) is significantly higher than that of the pristine ACNFs and ACNF/MnO2 which is 478 and 430 m2 g-1, respectively. FTIR analysis showed peaks of 476 and 547 cm-1, indicating the presence of MgO and MnO2, respectively. The FESEM micrographs analysis showed a smooth but coarser structure in all the ACNFs. Meanwhile, the ACNF/MgO has the smallest fiber diameter (314.38±62.42 nm) compared to other ACNFs. The presence of MgO and MnO2 inside the ACNFs was also confirmed with EDX analysis as well as XRD. The adsorption capacities of each ACNF toward CH4 were tested with the volumetric adsorption method in which the ACNF/MgO exhibited the highest CH4 adsorption up to 2.39 mmol g-1. Meanwhile, all the ACNF samples followed the pseudo-second order kinetic model with a R2 up to 0.9996.

Keyword: activated carbon nanofibers, magnesium oxide, manganese dioxide, methane adsorption