Papers by GESHA DESY ALISHA ALISHA
Bulletin of Chemical Reaction Engineering & Catalysis
In this work, Lapindo mud (LM) was used as catalyst support. This is because the Lapindo mud has ... more In this work, Lapindo mud (LM) was used as catalyst support. This is because the Lapindo mud has a high SiO2 content of 45.33 %. This research aims to produce a hydrocracking catalyst based on Lapindo mud through impregnation of Ni and Pt metals as well as grafting amine groups. Ni and Pt metals impregnation using wet impregnation method followed by amine group grafting. The best catalyst in this study was NiPt-NH2/LM which contained Ni and Pt metals, surface area, and pore diameters of 1.68 wt.% and 0.4 wt.%, 6.59 m2/g, 15.51 nm, respectively. The effectiveness of the catalyst was tested against temperature and catalyst: feed ratio. The catalyst with the best activity and selectivity was tested for reusability 3 times through hydrocracking process. The yield of liquid products obtained in the hydrocracking process of WPO using NiPt-NH2/LM catalyst with the optimum temperature and the weight ratio of catalyst:feed at 550 oC was 79.4 wt. % which consists of hydrocarbon compound of 55...
Silicon, 2021
The highest activity and selectivity results were achieved in the presence of Mo metal supported ... more The highest activity and selectivity results were achieved in the presence of Mo metal supported by SBA-15. Mo/SBA-15 catalyst was synthesized using the wet impregnation method. Catalysts were characterized using FTIR, XRD, Surface Area Analyzer (SAA), and SEM-EDX. Mo/SBA-15 has pore diameters, surface area, and Mo metal concentration of 561.4 m 2 /g, 6.53 nm, and 4.41%, respectively. The hydrocracking process was carried out at a temperature of 500 °C with a ratio of catalyst: feed weight 1: 100. The best catalyst for hydrocracking of waste palm cooking oil was Mo/SBA-15. The presence of Mo metal is role play in the hydrocracking process because it can increase the activity and selectivity of the catalyst. In addition, decreased pore diameter and surface area also affect the hydrocracking process. The total liquid product produced by the Mo/SBA-15 catalyst was 53.86 wt.%. The results of the conversion of liquid products analyzed using GC-MS showed a total hydrocarbon compound of 50.35 wt.%. The fraction of gasoline produced was 42.46 wt.% and the fraction of diesel fuel produced was 7.89 wt.%.
In this study, natural source Parangtritis beach sand was extracted into mesoporous silica (MS). ... more In this study, natural source Parangtritis beach sand was extracted into mesoporous silica (MS). Synthesis of mesoporous silica (MS) was carried out at sodium silicate: CTAB ratio of 1:0.5 (w/w). Monometallic catalyst was used to improve the performance of the catalyst. The monometallic used was Mo metal, which was synthesized using the wet impregnation method. Catalysts were characterized using FTIR, XRD, Surface Area Analyzer (SAA), SEM-EDX, and TEM. MS has pore diameters and surface area of 2.62 nm and 897.3 m2/g. Mo/MS has pore diameters, surface area, and Mo metal concentration of 2.46 nm, 593 m2/g, and 4.75 %. Catalytic activity and selectivity were evaluated in hydrocracking of waste palm cooking oil at 500, 550, and 600 oC, and catalyst: waste palm cooking oil ratio of 1:100, 1:200, and 1:300. The best catalyst will be tested for reusability 3 times through the hydrocracking process. Mo/MS produces better liquid products and hydrocarbon compounds than MS. The results of the ...
Universitas Gadjah Mada, 2021
Waste and Biomass Valorization, 2021
In this study, natural source Parangtritis beach sand was extracted into mesoporous silica (MS). ... more In this study, natural source Parangtritis beach sand was extracted into mesoporous silica (MS). Synthesis of mesoporous silica (MS) was carried out at sodium silicate: CTAB ratio of 1:0.5 (w/w). Monometallic catalyst was used to improve the performance of the catalyst. The monometallic used was Mo metal, which was synthesized using the wet impregnation method. Catalysts were characterized using FTIR, XRD, Surface Area Analyzer (SAA), SEM-EDX, and TEM. MS has pore diameters and surface area of 2.62 nm and 897.3 m 2 /g. Mo/MS has pore diameters, surface area, and Mo metal concentration of 2.46 nm, 593 m 2 /g, and 4.75 %. Catalytic activity and selectivity were evaluated in hydrocracking of waste palm cooking oil at 500, 550, and 600 o C, and catalyst: waste palm cooking oil ratio of 1:100, 1:200, and 1:300. The best catalyst will be tested for reusability 3 times through the hydrocracking process. Mo/MS produces better liquid products and hydrocarbon compounds than MS. The results of the conversion of liquid products analyzed using GCMS. The yield of liquid products obtained in the hydrocracking of waste palm cooking oil using Mo/MS with the optimum temperature and the weight ratio of catalyst: feed at 550 o C and 1: 300 was 66.99 wt.% with consists of hydrocarbon compound as 62.79 wt.%. The yield of liquid products obtained in the hydrocracking waste palm cooking oil using the used Mo/MS catalyst in the last run was 80.26 wt.% with consist of hydrocarbon compound as 74.13 wt.%.
Biomass Conversion and Biorefinery
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Papers by GESHA DESY ALISHA ALISHA