Physics Journal of the Indonesian Physical Society
POROSITY IN CARBON PELLET FROM OIDINE TREATED SELF-ADHESIVE CARBON GRAIN PREPARED FROM OIL PALM EMPTY FRUIT BUNCH
Mohamad Deraman, Mazliza Mohtar, Ramli Omar and Astimar Abdul Aziz
School of Applied Physics, Faculty of Science and TechnologyUniversiti Kebangsaan Malaysia, 43600 Bangi, Selangor, Malaysia
Self-adhesive carbon grain (SACG) prepared from fiber of oil palm empty fruit bunch (EFB) was treated with iodine at 90°C for 72 h before it was pelletized and carbonized up to 1000°C. In order to study the effect of this treatment on the porosity, the BET nitrogen adsorption/desorption analysis of the carbon pellets was carried out using ASAP 2000-Accelerated Surface Area and Porosimetry Analyzers. It was found that (a) the treated SACG increase in weight by 8% (b) density reduction after carbonization of the treated SACG (9.9%, dry weight basis) is higher than that of the untreated SACG (2.6%, dry weight basis), and (c) BET surface area, porosity surface area, porosity volume and average porosity diameter are due to meso- and macro-porosity, i.e. 23.3 m2/g, 20.9 m2/g, 0.008 m2/g and 237.7 nm for the carbon pellet from untreated SACG and 6.5 m2/g, 3.5 m2/g, 0.001 m2/g, 576.0 nm for the carbon pellet from the treated SACG, respectively. These results indicate that the dehydrogenative polymerization that occurs in the treated SACG give a significant effect on the porosity characteristic of the carbon pellet. In our previous study we observed that such a treatment gave (a) significant effects on the Thermo-Gravimetric (TG) and Fourier-transform-infrared (FTIR) data on the treated SACG, and micro-structural properties (SEM) of the carbon pellets from the iodine treated SACG, and (b) insignificant effects on the Young modulus, hardness and electrical conductivity of carbon pellets from the treated SACG, which could be due to the absence of the micro-porosity in both the carbon pellets from untreated and treated SACG.