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PENGARUH JUMLAH KATALIS DAN TEMPERATUR TERHADAP KUANTITAS DAN KUALITAS BIODIESEL DARI BIJI JARAK PAGAR DENGAN METODE ESTER-TRANSESTERIFIKASI INSITU Hadiah, Fitri; Alfernando, Oki; Sumbarin, Yudi
Jurnal Teknik Kimia Vol 17, No 6 (2011): Jurnal Teknik Kimia
Publisher : Jurusan Teknik Kimia, Fakultas Teknik, Universitas Sriwijaya

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Abstract

Jarak pagar dapat ditemukan tumbuh subur di berbagai tempat di Indonesia. Biji jarak pagar dapat diolah menjadi biodiesel karena memiliki kandungan minyak khususnya trigliserida yang merupakan komponen utama dalam pembuatan biodiesel. Pengolahannya dapat dilakukan dengan reaksi ester-transesterifikasi insitu menggunakan katalis asam dan basa. Pada penelitian ini dilakukan esterifikasi serbuk biji jarak dengan katalis asam sulfat dan transesterifikasi serbuk biji jarak dengan katalis natrium hidroksida. Variasi dilakukan terhadap persen asam sulfat (H2SO4) dan natrium hidroksida (NaOH) serta temperatur untuk mengetahui pengaruh variabel-variabel tersebut terhadap biodiesel yang diperoleh. Analisa biodiesel dilakukan dengan analisa gravimetri dan volumetri secara kuantitatif. Analisa gravimetri dilakukan untuk menentukan persen yield produk yang didapat, sedangkan analisa volumetri dilakukan untuk menentukan angka asam, viskositas dan densitas dari biodiesel yang dihasilkan. Dari variasi konsentrasi H2SO4 dan NaOH serta temperature yang dilakukan pada penelitian ini, maka diperoleh produk pada katalis 1 % dan temperatur 70oC untuk biodiesel terbaik secara kualitas dan katalis 3 % dan temperatur 70oC yang terbaik secara kuantitas.
Deacidification of Fatty Oils using Anion Exchange Resin Hadiah, Fitri
Sriwijaya International Seminar on Energy-Environmental Science and Technology Vol 1, No 1 (2014)
Publisher : Sriwijaya International Seminar on Energy-Environmental Science and Technology

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Abstract

Crude fatty oils contain a large number of impurities, including gum, free fatty acids, and coloring substances that must be removed in order to create an acceptables refined oil. This paper describes method to deacidify three fatty oils by adsorbing their free fatty acid contents on Rohm and Haas Amberlite IRA 900 anion exchange resin in a fixed bed adsorber. After deacidification, their acid values are lower than 0.6 and the color are brighter. By combining the three steps regeneration method, the resin can be re-utilized without losing its adsorption capacity for 3 cycles.
Catalytic Transfer-Hydrogenation of Fatty Oil Hadiah, Fitri
Sriwijaya International Seminar on Energy-Environmental Science and Technology Vol 1, No 1 (2014)
Publisher : Sriwijaya International Seminar on Energy-Environmental Science and Technology

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Abstract

Polyunsaturated fatty acids are the main cause of the poor thermal and oxidative stabilities of fatty oils as well as biodiesels. The conversion of polyunsaturated to monounsaturated fatty acid moieties are normally carried out via hydrogenation. The most conventional hydrogenation process uses gaseous hydrogen at relatively high temperature and pressure in the presence of metal catalysts. Catalytic-transfer hydrogenation is an alternative method for oil hydrogenation which does not require the presence of hydrogen and can be carried out at atmospheric pressure. This paper describes the catalytic transfer-hydrogenation of kapok seed oil (Ceiba pentandra) and candlenut oil (Aleurites moluccana) by potassium formate (KOOCH) solutions using the following catalysts: Ag–Cu2O, Ag–Cu2O/Pumice, Ag–Cu2O–Pd/Pumice, and Pd/C 5%. None of the catalysts were found effective and kapok seed oil hydrogenated using 5%-Pd/C catalyst turned into gel, most probably due to the polymerization reactions of sterculic and malvalic acid
Pengaruh Katalis NiMo Terhadap Kualitas Minyak Batubara Hasil Pencairan Tidak Langsung Damayanti, Rika; Rachman, Susila Arita; Hadiah, Fitri
Al-Kimia Vol 7, No 1 (2019)
Publisher : Study Program of Chemistry - Alauddin State Islamic University of Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24252/al-kimia.v7i1.6560

Abstract

Coal is a fossil energy source that is widely used as a soild fuel in many sectors. The development of indirect coal liquefaction technology is one type of technology used to convert coal into a liquid fuel product in the form of coal oil with characteristics resemble petroleum fuels. Coal oil production can be an alternative fuel source for future energy needs. In this study, the indirect liquefaction process of coal (calorific value = 6400 kcal/kg) was done in the fluidized bed reactor by heating the reactor with an electric furnace, where the process took place at temperature 350oC - 500oC and the catalyst weight was varied into 0%, 5%, 10%, and 15%. Air with a flow rate 2 LPM is flowed during the process and the lenght of the process was 60 minutes. From this research, the best characteristics of coal oil produced at a temperature of 400oC - 450oC with a catalyst weight of 15%. The characteristics of the coal oil obtained have a density of 0.852 g / cm3, specific gravity of 0.853 and oAPI gravity of 34.41. The results of GC-MS analysis was known that 46.15% of the composition of hydrocarbons in coal oil is the fraction of gasoline.
The Characteristic of Coal Oil From Catalytic Coal Gasification Damayanti, Rika; Arita, Susila; Hadiah, Fitri
IJFAC (Indonesian Journal of Fundamental and Applied Chemistry) Vol 4, No 2 (2019): June 2019
Publisher : IJFAC (Indonesian Journal of Fundamental and Applied Chemistry)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (509.942 KB) | DOI: 10.24845/ijfac.v4.i2.59

Abstract

In this work, the catalytic gasification process of coal was studied at different operating temperatures and catalyst weights. The purpose of this study was to study the characteristics of coal oil produced through the gasification process using Nickel Molybdenum (NiMo) catalyst. The effect of adding NiMo catalyst with variations in weight of 0%, 5%, 10% and 15% for different gasification temperatures (375 – 385 °C, 430 – 440 °C, and 475 – 485 °C) were studied on coal with a calorific value of 6,400 kcal/kg. The process was done in fluidized bed reactor under atmospheric pressure and an air flow rate of 2 liters/minute was flow for 60 minutes. The results showed that NiMo is effective as a catalyst in the gasification of coal at 430 – 440 °C, the addition of 15% weight of catalysts produced coal oil with a yield of 9.35% and the composition of hydrocarbon consists of 59.75% of aromatics, 26.42% of aliphatics, and 7.34% of phenolics. Compared to coal oil without catalyst give a yield of 6.56% with 57.33% of aromatics, 17.44% of aliphatics, and 16.03% of phenolics. This showing that NiMo catalysts have a high selectivity to increase aromatic and aliphatic hydrocarbons in coal oil.