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All Journal Eksergi Seminar Nasional Teknik Kimia Kejuangan
Zubaidi Achmad
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Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Engineering Environmental Science

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Renewable Energy from Pyrolysis of Pine Wood with Zeolite Catalyst Zubaidi Achmad; Abdullah Kunta Arsa; Bety Alfitamara; Alfia Virgiandini
Eksergi Vol 19, No 1 (2022)
Publisher : Prodi Teknik Kimia, Fakultas Teknologi Industri, UPN "Veteran" Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/e.v19i1.4564

Abstract

Renewable energy becomes a hot issue on the decrease of fossil energy reserves that can not be renewed. To answer the challenge of the availability of these energy a study was performed in a high-temperature cracking process from pine wood to obtain fuel oil or so-called pyrolysis. The purpose of this study was to determine the yield, physical properties, and the calorific value of the pyrolysis results. Pyrolysis process is done by varying the percentage of mordenite-type zeolite catalyst as much as  0% b/b, 2% b/b, and 4% b/b, with a mass of 100 grams of pine wood that passes sieving each sample to 50 mesh. Before use, the catalysts physically activated by heating at a temperature of 500°C and chemically activated using HCl to enhance the activity of the zeolite. Pyrolysis carried out at 400°C, 450°C, 500°C, and 550°C. After the analysis, bio-oil obtained optimum yield of 43.77142% by mass of the catalyst 4% b/b and a temperature of 500 °C. Physical properties obtained in the form of density 1.094723 g/ml, 2.96 cP viscosity, and 58°C flash point. While the highest calorific value on the condition of the catalyst 4% and the reaction temperature 550°C is 26045.50 kJ/kg.
Perbaikan Mutu Minyak Kelapa Sawit Curah dengan Metode Adsorpsi dalam Tangki Berpengaduk Dena Sukantala Dewi; Ainun Farah Baiqfirlana; Bambang Sugiarto; Zubaidi Achmad
Prosiding Seminar Nasional Teknik Kimia "Kejuangan" 2017: PROSIDING SNTKK
Publisher : Seminar Nasional Teknik Kimia Kejuangan

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Abstract

This research objective is to improve the quality of Crude Palm Oil (CPO). In general, CPO contain free fatty acid known as FFA. CPO purification is necessary to eliminate FFA. In this research, CPO purification conducted by using adsorption method with various adsorbent. The adsorbent has to be activated with NaOH 0,087 N before being used. The variable used are variation of adsorbent (zeolite, bioceramics, and carbon active), adsorbent size (mesh of 20,30, 40,80, 100), and mixing time (10, 20, 30, 40, and 50 minutes). CPO quality can be analyzed by acidic-alkaline method to measure the number of acid, proxyde, saponification, iodine, and water value. The result showed that the optimum condition occurred when using zeolite of 100 mesh and 50 minutes mixing time. Before adsorption, the measurement for number of acid, peroxide, saponification, iodine and water value are respectively 1,9889; 16; 150,0675; 19,6695; and 6,572%. While the measurement result after adsorption are 0,1989 for acid number; 2 for peroxide number; 200,5575 for saponification number; 45,684 for iodine number; and 0,242% for water value. Compare to SNI 01-3741-1995 Standar Mutu Minyak Goreng, the result showed that CPO quality is improved and in line with the SNI requirement.
KOEFISIEN PERPINDAHAN PANAS KONVEKSI PADA PEMISAHAN FRAKSI RINGAN MINYAK PELUMAS BEKAS Tunjung Wahyu Widayati; Zubaidi Achmad
Eksergi Vol 9, No 1 (2008): Versi Cetak
Publisher : Prodi Teknik Kimia, Fakultas Teknologi Industri, UPN "Veteran" Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/e.v9i1.7554

Abstract

Lubricant oil has límited time in its using. After ín that time, the oìl has been not aplicated so ít hasto be substìtuted with the another one. By forward wíth transportation, there wìll be pollution in environment. Inholding that problems, so the renewable processing used lubrícant oil is needed to be more ecommíc product. The process was done ín the separating equipment that was being heated 200-250"C wíth some pnæess ptameters.The parameters were 0.061 -0.0389 m/sec in flow rate, 170-230 degree C in the feeding temperature, 0.11 - 0.07 m in ã diameter of separation equipment, 77 -95.5'C in the diference temperature wíth in oíl and equipment wall. The feed from feed tank was flowed by pass heater and than its in to separation equipment. The product was dístilate, were analyzed in physic characterìzatíon í.e., specific gravity, viscosity, colour ASTM and flash point. The rafinate þottom product, heavy fractÍon, was put ín to feeding tank. The rafinøt was analyzed fisic characterization i.e., specítìc gratity, flash point, fire poínt¡ kinematic, viscosíty and viscosity índex. The rafinate analysis was done after the process was stopped.
Mass Transfer Coefficient of Extraction of Anthocyanin from Mangosteen Peel (Garcinia mangostana L.) with Ethanol-HCl as Solvent Zubaidi Achmad; Faizah Hadi; Siti Diyar Kholisoh
Eksergi Vol 19, No 3 (2022)
Publisher : Prodi Teknik Kimia, Fakultas Teknologi Industri, UPN "Veteran" Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/e.v19i3.8008

Abstract

Anthocyanin is a natural pigment that causes the purple skin of the mangosteen fruit. This study aimed to observe the effect of temperature, stirring time, and ethanol concentration in ethanol–HCl solvent on anthocyanins produced from the mangosteen peel extraction process and determine the value of its mass transfer coefficient. The laboratory work was conducted with mangosteen peel powder extracted with ethanol solvent containing 1% HCl solution using an extraction apparatus set. The mangosteen rind is cleaned and then mashed until it passes the size of -60+80 mesh. Then 50 g of mangosteen rind powder was put into a three-neck flask along with ethanol solution with various concentrations of 55%, 65%, 75%, 85%, and 95%, each containing 1% HCl. Extraction was carried out at various stirring times of 3, 4, 5, 6, and 7 hours with temperature variations of 30, 40, 50, 60, and 70oC. Each product was distilled at a temperature of <60oC. Anthocyanin content were analyzed by spectrophotometric method. The results showed that the optimum conditions at the extraction temperature of 50oC with stirring time for 4 hours and 95% ethanol concentration in ethanol–HCl solvent with anthocyanin content obtained of 9,8377.10-4 (g anthocyanin/g solvent) and kC of 0,00781 g/(cm2.hour).
Co-Authors Abdullah Kunta Arsa Ainun Farah Baiqfirlana Alfia Virgiandini Bambang Sugiarto Bety Alfitamara Dena Sukantala Dewi Faizah Hadi Siti Diyar Kholisoh Tunjung Wahyu Widayati