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Fadarina
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TINJAUAN SISTEM PENGERING SILIKA GEL BERBASIS ABU SEKAM PADI MENGGUNAKAN SISTEM VAKUM TRAY DRYER TERHADAP KEMAMPUAN DAYA SERAP Arisqi, Muhamad Muammar; Junaidi, Robert; Fadarina
KINETIKA Vol. 12 No. 3 (2021): KINETIKA 01112021
Publisher : Politeknik Negeri Sriwijaya

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Rice husks are waste from the agricultural industry. Usually this rice husk waste is burned and thrown away without any further processing so that it can pollute the environment. To reduce waste from rice husk ash, in this study rice husk ash will be used as an adsorbent in increasing the adsorbent capacity of silica gel. Rice Husk Ash contains 97.3% Silica. The high silica content of Rice Husk Ash has the potential to be used as a material for making silica-based materials such as silica gel. The large amount of silica (SiO2) contained in rice husk ash makes rice husk ash potential as a raw material for making silica gel. Rice husk ash as adsorbent can also absorb dye from woven fabric waste which is directly disposed of into receiving waters. In this research phase, starting from the extraction process of rice husk ash with 2M KOH at a temperature of 110 oC for 2 hours. Furthermore, it will be lightened in a desiccator and filtered to get a filtrate in the form of Na2SiO3. The filtrate will be mixed with H2SO4 solution until the pH is at a value of 7 and dry it in an oven with a variation of 4, 5 and 6 hours at a temperature of 120 oC. To see the silica gel content using Gravimetry, while to analyze the absorption of dyes in woven fabric waste using UV-Vis Spectrophotometry.
KINETIKA REAKSI TRANSESTERIFIKASI MINYAK KELAPA SAWIT MENJADI METIL ESTER DENGAN KATALIS CaO/ ABU TERBANG BATUBARA Fiyansah, Toni Okta; Fadarina; Aznury, Martha
KINETIKA Vol. 12 No. 3 (2021): KINETIKA 01112021
Publisher : Politeknik Negeri Sriwijaya

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Catalyst CaO from snakehead fishbone with supported by fly ash has advantages for the transesterification reaction process, which include active heterogeneous base properties, low solubility, good mechanical strength, and reusability. This study aims to determine the best catalyst that has the optimum impregnation time and mass of CaO in terms of the transesterification reaction of palm oil into methyl esters. The study includes: prediction of the mechanism according to the experimental data, through the effect of impregnation time and the added mass of CaO on changes in the reaction rate that occur, and the formulation of the final equation for the optimum reaction rate of the catalyst. Prediction of the mechanism that occurs follows the Eley-Rideal mechanism, where the reactant adsorbed on the surface of the catalyst is methanol and reacts with triglycerides (palm oil) to produce methyl esters and glycerol. The results of the study indicate that the greater the impregnation temperature and the added mass of CaO, the greater the rate value. The results showed that the optimum catalyst had an impregnation temperature of 80ºC and a mass of CaO 100 grams, with a reaction time of 120 minutes to produce a yield of 98.55%, and a reaction rate of 4.44×10-6 mol/gramcat.
Co-Authors Arisqi, Muhamad Muammar Fiyansah, Toni Okta Martha Aznury Robert Junaidi