THE 4TH INTERNATIONAL CONFERENCE ON MATHEMATICS AND SCIENCE EDUCATION (ICoMSE) 2020: Innovative Research in Science and Mathematics Education in The Disruptive Era, 2021
Latin American Applied Research - An international journal
The purpose of the study was to synthesize methyl esters from Off Grade (CPO) using a CaO/a-Fe2O3... more The purpose of the study was to synthesize methyl esters from Off Grade (CPO) using a CaO/a-Fe2O3 catalyst and its potential as biodiesel. The experimental laboratory carried out: activation of natural zeolite, characterization of Off Grade CPO, refinement, synthesis of CaO/a-Fe2O3, esterification, trans-esterification using CaO/a-Fe2O3 with mass variation (8:2, 7:3, 6:4), characterization, and identification by GC-MS test. The results showed that Off Grade CPO had the characteristics of: 0.923 g/mol density, 52.27 cSt viscosity, and 15.20% free fatty acid (FFA). CaO/a-Fe2O3 catalyst was successfully synthesized. The optimum conditions for trans-esterification occurred at a mole ratio of oil:methanol about 1:12, 3% catalyst, 60 ?, 3 hours, and a catalyst mass ratio of 8:2. The synthesized methyl ester had the characteristics of: 0.851 g/mL density, 4.790 cSt viscosity, 1.447 refractive index, and 0.50 acid number which was in accordance with the quality standard of SNI Biodiesel 718...
The study aimed: (1) to characterize the purity of the silica and the synthesized zeolites; (2) t... more The study aimed: (1) to characterize the purity of the silica and the synthesized zeolites; (2) to find out the effect of temperature and time of sonication on the cellulose hydrolysis process of banana pseudostem; and (3) to determine the effectiveness of HY-zeolite. Four stages were carried out, including (1) silica extraction, (2) synthesis of HY zeolite, (3) hydrolysis process, and (4) glucose content test. The results showed that (1) The purity of silica reached 93.9% and the results of XRF, XRD, SEM, and FTIR of HY Zeolite were: 2.3 Si /Al, obtained 2 theta and d-spacing data similarities for HY zeolite, cuboid, and formed T-OT, O-T-O (T = Si/Al), and Si-OH groups respectively; (2) HY zeolite with ultrasonic was effective for hydrolyzing cellulose into glucose with a yield of 0.849% at maximum temperature and time, 55 oC and six hours, (3) the longer time and high-temperature sonication, the more amount of glucose produced.
Many silica minerals are found in beach sand. One of its beaches is in Bajul Mati beach sand whic... more Many silica minerals are found in beach sand. One of its beaches is in Bajul Mati beach sand which contains high silica. The silica can be extracted using existing methods, but it is less environmentally friendly. In this research, the extracting process of silica from the sand of Bajul Mati beach (south of Java-Indonesia) has been carried out through a method that is low cost and more environmentally friendly. The study aims to characterize extracted silica with instrumentation results, and economic analysis. The method of extracting silica from beach sand via leaching and sol-gel methods: (1) leaching with 7 M HCl (2) the formation of clear sodium silicate solution (Na2O.xSiO2); (3) sol-gel: sodium silicate solution titrated with oxalic acid (H2C2O4) 1 M until pH 6 was obtained and silicite Si(OH)4 was formed; and 4) characterization with XRF, XRD, FTIR, and SEM with economic analysis. The result showed that extracted silica has a cristobalite structure based on XRD analysis. The ...
International Journal of Advances in Applied Sciences
Many silica minerals are found in beach sands. One of its beach sands is in Bajul Mati beach sand... more Many silica minerals are found in beach sands. One of its beach sands is in Bajul Mati beach sand which contains high silica. The silica can be extracted using existing methods, but it is less environmentally friendly. In this research, the extracting process of silica from the sand of Bajul Mati beach (South of Java-Indonesia) has been carried out through a method that is low-cost and more environmentally friendly. The purpose of this study was to characterize extracted silica with instrumentation results and economic analysis. The method of extracting silica from beach sand was via leaching and sol-gel methods: i) leaching with 7M HCl,ii) the formation of clear sodium silicate solution (Na2O.SiO2),iii) sol-gel: sodium silicate solution titrated with oxalic acid (H2C2O4) 1 M until pH 6 was obtained and silicite Si(OH)4 was formed, and iv) characterization with X-ray fluorescence (XRF), X-ray diffraction (XRD), Fourier transform infrared (FTIR), and scanning electron microscopy (SEM...
THE 5TH INTERNATIONAL CONFERENCE ON MATHEMATICS AND SCIENCE EDUCATION (ICoMSE) 2021: Science and Mathematics Education Research: Current Challenges and Opportunities
THE 4TH INTERNATIONAL CONFERENCE ON MATHEMATICS AND SCIENCE EDUCATION (ICoMSE) 2020: Innovative Research in Science and Mathematics Education in The Disruptive Era, 2021
Latin American Applied Research - An international journal
The purpose of the study was to synthesize methyl esters from Off Grade (CPO) using a CaO/a-Fe2O3... more The purpose of the study was to synthesize methyl esters from Off Grade (CPO) using a CaO/a-Fe2O3 catalyst and its potential as biodiesel. The experimental laboratory carried out: activation of natural zeolite, characterization of Off Grade CPO, refinement, synthesis of CaO/a-Fe2O3, esterification, trans-esterification using CaO/a-Fe2O3 with mass variation (8:2, 7:3, 6:4), characterization, and identification by GC-MS test. The results showed that Off Grade CPO had the characteristics of: 0.923 g/mol density, 52.27 cSt viscosity, and 15.20% free fatty acid (FFA). CaO/a-Fe2O3 catalyst was successfully synthesized. The optimum conditions for trans-esterification occurred at a mole ratio of oil:methanol about 1:12, 3% catalyst, 60 ?, 3 hours, and a catalyst mass ratio of 8:2. The synthesized methyl ester had the characteristics of: 0.851 g/mL density, 4.790 cSt viscosity, 1.447 refractive index, and 0.50 acid number which was in accordance with the quality standard of SNI Biodiesel 718...
The study aimed: (1) to characterize the purity of the silica and the synthesized zeolites; (2) t... more The study aimed: (1) to characterize the purity of the silica and the synthesized zeolites; (2) to find out the effect of temperature and time of sonication on the cellulose hydrolysis process of banana pseudostem; and (3) to determine the effectiveness of HY-zeolite. Four stages were carried out, including (1) silica extraction, (2) synthesis of HY zeolite, (3) hydrolysis process, and (4) glucose content test. The results showed that (1) The purity of silica reached 93.9% and the results of XRF, XRD, SEM, and FTIR of HY Zeolite were: 2.3 Si /Al, obtained 2 theta and d-spacing data similarities for HY zeolite, cuboid, and formed T-OT, O-T-O (T = Si/Al), and Si-OH groups respectively; (2) HY zeolite with ultrasonic was effective for hydrolyzing cellulose into glucose with a yield of 0.849% at maximum temperature and time, 55 oC and six hours, (3) the longer time and high-temperature sonication, the more amount of glucose produced.
Many silica minerals are found in beach sand. One of its beaches is in Bajul Mati beach sand whic... more Many silica minerals are found in beach sand. One of its beaches is in Bajul Mati beach sand which contains high silica. The silica can be extracted using existing methods, but it is less environmentally friendly. In this research, the extracting process of silica from the sand of Bajul Mati beach (south of Java-Indonesia) has been carried out through a method that is low cost and more environmentally friendly. The study aims to characterize extracted silica with instrumentation results, and economic analysis. The method of extracting silica from beach sand via leaching and sol-gel methods: (1) leaching with 7 M HCl (2) the formation of clear sodium silicate solution (Na2O.xSiO2); (3) sol-gel: sodium silicate solution titrated with oxalic acid (H2C2O4) 1 M until pH 6 was obtained and silicite Si(OH)4 was formed; and 4) characterization with XRF, XRD, FTIR, and SEM with economic analysis. The result showed that extracted silica has a cristobalite structure based on XRD analysis. The ...
International Journal of Advances in Applied Sciences
Many silica minerals are found in beach sands. One of its beach sands is in Bajul Mati beach sand... more Many silica minerals are found in beach sands. One of its beach sands is in Bajul Mati beach sand which contains high silica. The silica can be extracted using existing methods, but it is less environmentally friendly. In this research, the extracting process of silica from the sand of Bajul Mati beach (South of Java-Indonesia) has been carried out through a method that is low-cost and more environmentally friendly. The purpose of this study was to characterize extracted silica with instrumentation results and economic analysis. The method of extracting silica from beach sand was via leaching and sol-gel methods: i) leaching with 7M HCl,ii) the formation of clear sodium silicate solution (Na2O.SiO2),iii) sol-gel: sodium silicate solution titrated with oxalic acid (H2C2O4) 1 M until pH 6 was obtained and silicite Si(OH)4 was formed, and iv) characterization with X-ray fluorescence (XRF), X-ray diffraction (XRD), Fourier transform infrared (FTIR), and scanning electron microscopy (SEM...
THE 5TH INTERNATIONAL CONFERENCE ON MATHEMATICS AND SCIENCE EDUCATION (ICoMSE) 2021: Science and Mathematics Education Research: Current Challenges and Opportunities
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