scholarly journals PENENTUAN KOEFISIEN TRANSFER MASSA EKSTRAKSI KALIUM DARI ABU BATANG PISANG

Konversi ◽  
2012 ◽  
Vol 1 (1) ◽  
pp. 39
Author(s):  
Primata Mardina ◽  
Ajang Gunawan ◽  
Muhammad Imam Nugraha
Keyword(s):  
Mass Transfer ◽  
Transfer Coefficient ◽  
Mass Transfer Coefficient ◽  
Extraction Process ◽  
Effect Of Temperature ◽  
Average Error ◽  
Time Interval ◽  
Dimensionless Equation ◽  
The One ◽  
Increasing Temperature

 Abstrak-Kalium sebagai mineral alam bisa didapatkan dari batang pisang dengan cara ekstraksi padat-cair pada abu batang pisang menggunakan pelarut methanol. Penelitian ini bertujuan untuk mengetahui pengaruh suhu pada proses ekstraksi kalium dari abu batang pisang koefisien transfer massa proses tersebut. Proses ekstraksi ini dilakukan secara batch pada labu leher tiga yang dilengkapi dengan motor pengaduk, pendingin balik, termometer dan media pemanas. Abu batang pisang sebanyak 25 gram dan metanol 250 mL dimasukkan ke dalam labu leher tiga sebagai sampel. Ekstraksi dimulai dengan memanaskan sampel sampai suhu yang diinginkan, yaitu 30oC, 45 oC dan 60 oC, kemudian motor pengaduk dijalankan pada kecepatan yang telah ditentukan. Sampel diambil dalam selang waktu tertentu 0, 15, 30, 60, 120 180 dan 240 menit. Dari proses ekstraksi kalium dapat diketahui koefisien transfer massa. Hasil penelitian menunjukkan bahwa koefisien transfer massa semakin besar dengan semakin tinggi suhu operasi. Nilai koefisien transfer massa terbesar adalah 0,0235/menit pada suhu 60oC. Hubungan antara koefisien transfer massa dengan variabel-variabel yang mempengaruhinya dapat dinyatakan dengan persamaan dalam bentuk kelompok tak berdimensi sebagai berikut: Dengan ralat rata-rata 6,56 % Keywords: Ekstraksi, kalium, abu batang pisang,  Abstract-Potassium is the one of chemical compounds which can be extracted from ash of pseudo stem of banana by methanol solid-liquid extraction method. The experiment investigated the effect of temperature on mass transfer coefficient of potassium extraction process from ash of banana’s pseudo stem. This experiment conducted in a three necks flask which equipped with mechanical stirrer, condenser, thermometer and heating mantle. The sample was heated to desired temperature, 30oC, 45 oC and 60 oC. and maintained constant while reaction time. The reaction was timed as soon as the mechanical stirrer was turned on. Samples were drawn at specified time interval 0, 15, 30, 60, 120, 180 and 240 minutes. The result showed increasing temperature increased mass-transfer coefficient. The highest value of mass-transfer coefficient was 0,0235 /minute at 60oC.The correlation between mass transfer coefficient and investigated variables is shown in the dimensionless equation below: The average error is 6.56 % Keywords: Extraction, potassium, ash of banana’s pseudo stem.

scholarly journals MODEL KINETIKA EKSTRAKSI FLAVONOID DARI BAYAM MERAH (Alternanthera amoena voss)

2018 ◽  
Vol 6 (4) ◽  
pp. 8-14
Author(s):  
Iriany ◽  
Irsa Septiawan ◽  
Salwa Jody Gustia
Keyword(s):  
Mass Transfer ◽  
Transfer Coefficient ◽  
Mass Transfer Coefficient ◽  
Total Content ◽  
Effect Of Temperature ◽  
Polyphenol Compounds ◽  
Water Solvent ◽  
Ir Spectrophotometry ◽  
Ft Ir

Red spinach (Alternanthera amoena voss) contains vitamins, protein, and flavonoids. Flavonoid is polyphenol compounds having properties as a free radical catcher.The purpose of this research is to obtain the kinetic rate of flavonoid mass transfer from red spinach.Extraction is one of the way to take flavonoids contained in solids with the assist of solvents. Mass transfer in liquid solid extraction occurs by diffusion. The determination of mass transfer coefficient (KC) is to conduct the rate of mass transfer of flavonoids from solids. In this study, the effect of temperature on the extraction of flavonoids from red spinach with water solvent is observed. The temperatures extraction in this research are of 50°C, 60°C, and 70°C respectively. Determinationof total flavonoid, mass transfer coefficient, and antioxidant activity carried out using FT-IR Spectrophotometry and UV-VIS Spectrophotometry. This study concluded that the increase in extraction time and temperature will increase the total content of flavonoids and extract rendement.Mass transfer coefficient equation in this study is K = 3078645 . Antioxidants in red spinach are included in the group of very strong antioxidants.

scholarly journals Hydrogen Sulfide Removal from Biogas Using Digester Effluent Absorbent in a Continuous Vertical Column

REAKTOR ◽  
2018 ◽  
Vol 18 (03) ◽  
pp. 160
Author(s):  
Sunu Herwi Pranolo ◽  
Paryanto Paryanto ◽  
Margono Margono ◽  
Bachtiar Rizaldy ◽  
Hendrix Yansah
Keyword(s):  
Mass Transfer ◽  
Hydrogen Sulfide ◽  
Transfer Coefficient ◽  
Mass Transfer Coefficient ◽  
Average Error ◽  
Vertical Column ◽  
Liquid Phase Mass Transfer ◽  
Steady State Condition ◽  
Sulfide Removal ◽  
Hydrogen Sulfide Removal

HYDROGEN SULFIDE REMOVAL FROM BIOGAS USING DIGESTER EFFLUENT ABSORBENT IN A CONTINUOUS VERTICAL COLUMN. Gas-Liquid mass transfer is one of the most commonly used phenomena in the chemical process, such as absorbtion. This research evaluates the value of liquid phase mass transfer coefficient of hydrogen sulfide removal from biogas in a continous contactor column for digester effluent-biogas system. This study was carried out by contacting biogas at certain flow with digester effluent continously in a counter-current flow packed bed column. Samples were taken in steady state condition. This research used raschig rings, large balls, and small balls as packing materials with surface areas are 0.9269 m2/m3, 0.6279 m2/m3, and 0.2992 m2/m3 respectively at volumetric flow rates of biogas from 0.1109 m3/h to 0.8846 m3/h. The results show that the relationship between the variables and mass transfer coefficient gives following mathematical model This model is valid in the range of (As·dt) and (Vg/dt·DL) respectively from 0.03 to 0.09 and from 237,267.08 to 3,307,522.67. Average error is 17.85%.

scholarly journals The Effect of Temperature on Solvent Recycle Process using Stripping of CO2 from MDEA, Ethylene Glycol, and Water

2021 ◽  
Vol 927 (1) ◽  
pp. 012038
Author(s):  
Aswati Mindaryani ◽  
Edia Rahayuningsih ◽  
Nikodemus Bambang Wijayanto ◽  
Alwan Naufal Masulili
Keyword(s):  
Mass Transfer ◽  
Ethylene Glycol ◽  
Transfer Coefficient ◽  
Mass Transfer Coefficient ◽  
Flue Gas ◽  
Experimental Results ◽  
Effect Of Temperature ◽  
Gas Analyzer ◽  
Dissolved Gas

Abstract Stripping is a process to separate dissolved gas in the saturated solvent to regenerate the absorption solvent. In this study, N2 gas was used to strip dissolved CO2 gas in MDEA, ethylene glycol, and water. The experiment was conducted with three variations of temperature, namely 28°C, 35°C, and 50°C, to determine the effect of solvent’s temperature entering the stripper column on the value of the mass transfer coefficient (Kla). The stripper effluent was connected to the KANE 457 Flue Gas Analyzer to measure the concentration of CO2. Data retrievals were carried out at the 0; 30; 60; 90; 120; 150; 180th second. The experimental results show the trend of mass transfer coefficient of CO2 (Kla) is higher with the increase of solvent’s temperature entering the stripper.

scholarly journals The Correction of the Dimensionless Equation for the Mass Transfer Coefficient Estimation during the Membrane Modules Regeneration

2020 ◽  
Vol 7 (2) ◽  
pp. F24-F29
Author(s):  
S.V. Huliienko ◽  
Y.M. Korniienko ◽  
M.S. Metlina ◽  
I.Y. Tereshenko ◽  
V.S. Kaminskyi
Keyword(s):  
Mass Transfer ◽  
Transfer Coefficient ◽  
Mass Transfer Coefficient ◽  
Membrane Separation ◽  
Permeate Flux ◽  
Dimensionless Equation ◽  
Number Variation ◽  
Process Operation ◽  
Membrane Modules ◽  
Spiral Wound

The cleaning or regeneration of fouled membrane modules is an essential procedure in the membrane equipment operation. Despite the development of some successful cleaning techniques, the predictions of the membrane separation process operation parameters after regeneration is still an unsolved problem. In our previous works, the attempt to develop the methodology of estimating the membrane productivity after the regeneration of the fouled spiral wound membrane modules by cleaning the subatmospheric pressure has been made. However, this methodology requires some improvement, including the correction of the dimensionless equation to calculate the mass transfer coefficient. In this work, a set of additional experiments was carried out, and the corrections of the mass transfer correlation were done using both new and previously obtained experimental data. As a result, the improved dimensionless equation was contained as Sh = 0.00045Re0.8Sc0.33(de/l). This equation is valid in the range of Reynolds number variation of 0.4–60.0 for the case of the regeneration of spiral wound modules and can be used for the prediction of the permeate flux after the regeneration procedure.

scholarly journals MASS TRANSFER COEFFICIENT OF EXTRACTION TANNIN COMPOUNDS FROM PAPAYA LEAVES WITH 96% ETHANOL SOLVENT

Konversi ◽  
2021 ◽  
Vol 10 (1) ◽  
Author(s):  
Devri Eko Nurwahyuwono ◽  
Viola Eka Afrienty ◽  
Soemargono Soemargono ◽  
Nove Kartika Erliyanti
Keyword(s):  
Mass Transfer ◽  
Transfer Coefficient ◽  
Mass Transfer Coefficient ◽  
Pest Control ◽  
Rotational Speed ◽  
Control Plant ◽  
Extraction Process ◽  
Operating Conditions ◽  
Extraction Time ◽  
Antibacterial Compounds

Papaya leaves contain antibacterial compounds such as flavonoids, terpenoids, alkaloids, tannins, and saponins.. Tannins are compounds that are often used as antibacterial, antioxidant, pest control, plant fungi, tanners and as a corrosion inhibitor.In this study, the value of the mass transfer coefficient was determined. This study used two varied operating conditions, namely stirring rotational speed (100, 200, 300 rpm) and extraction time (30, 60, 90, 120, and 150 minutes). The extraction process is carried out using a stirred extractor at a temperature of 65 ° C.The value of the mass transfer coefficient obtained is 0.00004 second-1 (100 rpm), 0.00005 second-1 (200 rpm), and 0.00007 second-1 (300 rpm) for the best concentration obtained at 150 minutes with speed turn the stirrer 300 rpm

scholarly journals MATHEMATICAL CORRELATION BETWEEN MASS TRANSFER COEFFICIENTS AND PARAMETERS INFLUENCING THE PENICILLIN G REACTIVE EXTRACTION PROCESS

1995 ◽  
Vol 3 (3) ◽  
pp. 37-53
Author(s):  
Dan Cascaval ◽  
Corneliu Oniscu ◽  
Adina Dumitrascu
Keyword(s):  
Mass Transfer ◽  
Transfer Coefficient ◽  
Mass Transfer Coefficient ◽  
Extraction Process ◽  
Reactive Extraction ◽  
Penicillin G ◽  
Transfer Coefficients ◽  
Extractant Concentration ◽  
Average Deviation ◽  
Mathematical Correlation

In this paper, a correlation between the individual mass transfer coefficient of Penicillin G for the aqueous phase and two parameters of the reactive extraction process of Penicillin G with Amberlite LA-2, namely the extractant concentration in the organic phase, and the mixing intensity, was established. The proposed correlation offers a good concordance with the experimental values of the mass transfer coefficient and may be applied with a maximum error of 18 % and an average deviation of 1. 6 %.

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