This study was focused on the utilization of cow bones found in Aceh as a raw material for hetero... more This study was focused on the utilization of cow bones found in Aceh as a raw material for heterogenous catalyst preparation and study of its catalytic performance on transesterification reaction using castor oil as metil ester (biodesel. The catalyst was prepared by termal decomposition method calcined at 900°C in atmospheric air for 4 hours of its calcined time. The characterization of prepared catalysts were carried out using X-ray diffraction (XRD), where as the profile of the XRD difractogram resulted from the preparared catalysts showing spesific diffraction as the Ca<sub>5</sub>(PO<sub>4</sub>)<sub>3</sub>(OH) and CaO difractogram, as it has been reported on JCPDS system. The characterization catalyst using SEM-EDS show that the catalyst has a homogenous morphology. Based on GC-MS chromatogram of the tranesterification product, it could be noted that the FAMEs already produced in this experiment, The main compound produced from the traneste...
Novi Reandy Sasmita 12.00 Mixed matrixmembrane (MMM) adsorbers systems function as short and wide... more Novi Reandy Sasmita 12.00 Mixed matrixmembrane (MMM) adsorbers systems function as short and wide chromatographic columns in which the adsorptive packing consists of one or more micro-porous membranes. This study reports the use of membrane adsorbers for glycerol capturing and removing in crude biodiesel. The MMM are prepared by a wet phase inversion method. Magnesol were incorporated as active sites in the membrane. Matrix support of the membrane was prepared from chitosan.The optimum compositions of the adsorptive membranes were 3 % chitosan, 15% DMF and 60% loading adsorbent. The porosity of these membranes was 34 % and swelling degree was 52 %. The membrane clean water flux was 225 Lm-2h-1 at a trans-membrane pressure of 2.5 bar. The adsorptive membrane has been demonstrated to reduce the concentration of total glycerol in crude biodiesel. The amount of glycerol in biodiesel can be reduced 69.93 % in 60 minute which is agreed to value of SNI quality standards. The membrane adsor...
Janeng starch (Dioscorea Alata) and rice straws are developed to be used as adsorbents in dry was... more Janeng starch (Dioscorea Alata) and rice straws are developed to be used as adsorbents in dry washing method to purify crude biodiesel. In this study, we evaluate the potential of rice straw and janeng starch as natural adsorbents in the purification of biodiesel that replace the role of water in absorbing contaminants from biodiesel. The SEM characterization results show that the starch adsorbent and rice straw has an open and porous surface and is evenly distributed for janeng starch. Both adsorbents, either the janeng starch or rice straw, can be applied for the purification of biodiesel. The quality of biodiesel is influenced by the amount of adsorbents used in biodiesel purification. The effectiveness of the adsorbent is shown by the decrease in free fatty acids, alkali numbers, soap numbers and turbidity levels in biodiesel. The concentration of free fatty acid oil in crude biodiesel before the purification step was 0.769 mg-KOH/g, then decreased to 0.128 mg-KOH/g after the ad...
Silver nanoparticles (Ag0) have attracted the most attention due to their broad antimicrobial app... more Silver nanoparticles (Ag0) have attracted the most attention due to their broad antimicrobial application and outstanding activity. The silver nanoparticles are usually in colloidal form, then immobilization the colloid onto solid support is still interesting to explore. In this work, a new method for silver colloidal nanoparticle immobilization on silica gel beads (SiG), which was then symbolized as Ag0-[chi-SiG] was conducted and characterized successfully. The finding proved that SiG must be coated with three chitosan film layers to give stable support for silver nanoparticles. This coating method caused the chitosan completely covered SiG, and the chitosan film provides coordination bonding for silver ions. The most appropriate solvent for silver ion impregnation on the surface of chi-SiG is methanol compared to other solvents. Tungsten lamp as the photo-irradiation, which is low cost and environmentally friendly has been proven effective for silver ion reduction, as shown by si...
This study was focused on the utilization of cow bones found in Aceh as a raw material for hetero... more This study was focused on the utilization of cow bones found in Aceh as a raw material for heterogenous catalyst preparation and study of its catalytic performance on transesterification reaction using castor oil as metil ester (biodesel. The catalyst was prepared by termal decomposition method calcined at 900°C in atmospheric air for 4 hours of its calcined time. The characterization of prepared catalysts were carried out using X-ray diffraction (XRD), where as the profile of the XRD difractogram resulted from the preparared catalysts showing spesific diffraction as the Ca<sub>5</sub>(PO<sub>4</sub>)<sub>3</sub>(OH) and CaO difractogram, as it has been reported on JCPDS system. The characterization catalyst using SEM-EDS show that the catalyst has a homogenous morphology. Based on GC-MS chromatogram of the tranesterification product, it could be noted that the FAMEs already produced in this experiment, The main compound produced from the traneste...
Novi Reandy Sasmita 12.00 Mixed matrixmembrane (MMM) adsorbers systems function as short and wide... more Novi Reandy Sasmita 12.00 Mixed matrixmembrane (MMM) adsorbers systems function as short and wide chromatographic columns in which the adsorptive packing consists of one or more micro-porous membranes. This study reports the use of membrane adsorbers for glycerol capturing and removing in crude biodiesel. The MMM are prepared by a wet phase inversion method. Magnesol were incorporated as active sites in the membrane. Matrix support of the membrane was prepared from chitosan.The optimum compositions of the adsorptive membranes were 3 % chitosan, 15% DMF and 60% loading adsorbent. The porosity of these membranes was 34 % and swelling degree was 52 %. The membrane clean water flux was 225 Lm-2h-1 at a trans-membrane pressure of 2.5 bar. The adsorptive membrane has been demonstrated to reduce the concentration of total glycerol in crude biodiesel. The amount of glycerol in biodiesel can be reduced 69.93 % in 60 minute which is agreed to value of SNI quality standards. The membrane adsor...
Janeng starch (Dioscorea Alata) and rice straws are developed to be used as adsorbents in dry was... more Janeng starch (Dioscorea Alata) and rice straws are developed to be used as adsorbents in dry washing method to purify crude biodiesel. In this study, we evaluate the potential of rice straw and janeng starch as natural adsorbents in the purification of biodiesel that replace the role of water in absorbing contaminants from biodiesel. The SEM characterization results show that the starch adsorbent and rice straw has an open and porous surface and is evenly distributed for janeng starch. Both adsorbents, either the janeng starch or rice straw, can be applied for the purification of biodiesel. The quality of biodiesel is influenced by the amount of adsorbents used in biodiesel purification. The effectiveness of the adsorbent is shown by the decrease in free fatty acids, alkali numbers, soap numbers and turbidity levels in biodiesel. The concentration of free fatty acid oil in crude biodiesel before the purification step was 0.769 mg-KOH/g, then decreased to 0.128 mg-KOH/g after the ad...
Silver nanoparticles (Ag0) have attracted the most attention due to their broad antimicrobial app... more Silver nanoparticles (Ag0) have attracted the most attention due to their broad antimicrobial application and outstanding activity. The silver nanoparticles are usually in colloidal form, then immobilization the colloid onto solid support is still interesting to explore. In this work, a new method for silver colloidal nanoparticle immobilization on silica gel beads (SiG), which was then symbolized as Ag0-[chi-SiG] was conducted and characterized successfully. The finding proved that SiG must be coated with three chitosan film layers to give stable support for silver nanoparticles. This coating method caused the chitosan completely covered SiG, and the chitosan film provides coordination bonding for silver ions. The most appropriate solvent for silver ion impregnation on the surface of chi-SiG is methanol compared to other solvents. Tungsten lamp as the photo-irradiation, which is low cost and environmentally friendly has been proven effective for silver ion reduction, as shown by si...
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