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.

Study on the Gas-Liquid Two-Phase Flow Two-Phase Flow Characteristics of Carbon Dioxide Removal by Membrane Method

2011 ◽  
Vol 347-353 ◽  
pp. 1797-1800
Author(s):  
Yan Chao Li ◽  
Zhi Wu Hao ◽  
Xian Ping Zeng ◽  
Fang Qin Li ◽  
Jian Xing Ren
Keyword(s):  
Mass Transfer ◽  
Transfer Coefficient ◽  
Mass Transfer Coefficient ◽  
Flue Gas ◽  
Total Mass ◽  
Hollow Fiber Membrane ◽  
Flue Gases ◽  
Fiber Membrane ◽  
Shell Side ◽  
Two Phase

In this paper, membrane absorption method was introduced. Analyzed and studied flue gases passing in the shell side (hollow fiber membrane) and in the pipe side (membrane lumen) respectively. Total mass transfer coefficient and de CO2 efficiency were calculated. For flue gases passing in the pipe side, total mass transfer coefficient was 1.1191×10-4m/s and de CO2 efficiency was 73.8%; while for flue gases passing in the shell side, total mass transfer coefficient was 3.4701×10-4m/s and de CO2 efficiency was 98.0%. The results showed that the flow of flue gas flowing in the lumen is better than the flow of flue gas flowing out of the hollow fiber membrane from the point of views of removal rate and mass transfer. To build de CO2 experimental devices, flow of flue gas flowing in the pipe side was proposed.

Liquid-liquid mass transfer studies in various stirred vessel designs

2015 ◽  
Vol 31 (4) ◽  
Author(s):  
Reza Afshar Ghotli ◽  
Abdul Raman Abdul Aziz ◽  
Shaliza Ibrahim
Keyword(s):  
Mass Transfer ◽  
Transfer Coefficient ◽  
Mass Transfer Coefficient ◽  
Interfacial Area ◽  
Operating Conditions ◽  
Experimental Results ◽  
Dispersed Phase ◽  
Transfer Coefficients ◽  
Mass Transfer Coefficients ◽  
Wide Range

AbstractA general review on correlations to evaluate mass transfer coefficients in liquid-liquid was conducted in this work. The mass transfer models can be classified into continuous and dispersed phase coefficients. The effects of drop size and interfacial area on mass transfer coefficient were investigated briefly. Published experimental results for both continuous and dispersed phase mass transfer coefficients through different hydrodynamic conditions were considered and the results were compared. The suitability and drawbacks of these correlations depend on the operating conditions and hydrodynamics. Although the results of these models are reasonably acceptable, they could not properly predict the experimental results over a wide range of designs and operating conditions. Therefore, proper understanding of various factors affecting mass transfer coefficient needs to be further extended.

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 Effects of BaO and B2O3 on the Absorption of Ti Inclusions for High Titanium Steel

Metals ◽  
2021 ◽  
Vol 11 (1) ◽  
pp. 165
Author(s):  
Boyang Li ◽  
Xin Geng ◽  
Zhouhua Jiang ◽  
Yu Hou ◽  
Wei Gong
Keyword(s):  
Mass Transfer ◽  
Transfer Coefficient ◽  
Mass Transfer Coefficient ◽  
Titanium Oxide ◽  
Mold Flux ◽  
Rotating Cylinder ◽  
Experimental Results ◽  
Transfer Coefficients ◽  
Mold Fluxes ◽  
Cylinder Method

In order to study the effect of BaO or B2O3 on the absorption of Ti inclusions, the effects of mold fluxes with different contents of BaO (0~15%) or B2O3 (0~15%) on the mass transfer coefficients of TiO2 or TiN were studied with the rotating cylinder method. The experimental results show that with the addition of BaO in the mold flux, the mass transfer coefficient of TiO2 increases from 4.58 × 10−4 m/s to 6.08 × 10−4 m/s, that of TiN increases from 3.09 × 10−4 m/s to 4.41 × 10−4 m/s, 2CaO·MgO·2SiO2 is transformed into BaO·2CaO·MgO·2SiO2, and the Ti inclusions combine with CaO to form CaTiO3. With the addition of B2O3 in the mold flux, the mass transfer coefficient of TiO2 increases from 4.58 × 10−4 m/s to 7.46 × 10−4 m/s, that of TiN increases from 3.09 × 10−4 m/s to 5.50 × 10−4 m/s, CaO and B2O3 combine to 2CaO·B2O3, and Ti inclusions exist in the form of TiO2. During the experiment, TiN will be transformed into titanium oxide.

Hydrodynamics and mass transfer in turbulent liquid film flow involving the inlet portion

1981 ◽  
Vol 46 (2) ◽  
pp. 467-477 ◽  
Author(s):  
L. P. Kholpanov ◽  
V. A. Malyusov ◽  
N. M. Zhavoronkov
Keyword(s):  
Mass Transfer ◽  
Liquid Film ◽  
Transfer Coefficient ◽  
Mass Transfer Coefficient ◽  
Film Flow ◽  
Experimental Results ◽  
Inlet Section ◽  
Liquid Film Flow

Relationship for mass transfer coefficient in turbulent liquid film flow involving the inlet section have been derived theoretically. It was found that previously published experimental results were well explained by this theory.

scholarly journals Carbon Dioxide Absorption in a Fabricated Wetted-Wall Column Using Varying Concentrations of Aqueous Ammonia

2014 ◽  
Vol 13 (2) ◽  
pp. 9
Author(s):  
H.E.E. Ching ◽  
L.M.P. Co ◽  
S.I.C. Tan ◽  
S.A. Roces ◽  
N.P. Dugos ◽  
...  
Keyword(s):  
Mass Transfer ◽  
Steady State ◽  
Transfer Coefficient ◽  
Mass Transfer Coefficient ◽  
Flow Rate ◽  
Flue Gas ◽  
Carbon Capture ◽  
Aqueous Ammonia ◽  
Co2 Absorption ◽  
Wetted Wall Column

Due to the continued increasing levels of CO2 emissions that is contributing to climate change, CO2 mitigation technologies, particularly carbon capture and storage, are being developed to address the goal of abating CO2 levels. Carbon capture technologies can be applied at the pre-combustion, oxy-fuel combustion, and post-combustion stages, the latter being the most widely used due to its flexibility. Among the several CO2 separation processes available for carbon capture, absorption is the most widely used where amine solutions are used as absorbents. This paper highlights the use of a wetted wall column fabricated by Siy and Villanueva (2012) and simulated flue gas to determine the performance of CO2 absorption in terms of the percentage of CO2 absorbed, the steady state time, and the overall gas mass transfer coefficient. The concentrations used were 1, 5, 10, and 15% NH3(aq) at a constant temperature range of 12-17ºC, solvent flow rate of 100 mL/min, and simulated flue gas flow rate of 2 L/min. It was found that increasing the solvent concentration resulted in a proportional increase both in the percentage of CO2 absorbed and the overall gas mass transfer coefficient. The average percentage of CO2 absorbed ranged within 52.25% to 95.29% while the overall mass transfer coefficient ranged from 0.1843 to 0.7746 mmol/m2∙s∙kPa. However, erratic behavior was seen for the time required for the system to reach steady state. Using Design ExpertTM for analysis, the results showed that the effect of varying the concentration had a significant effect on the percentage of CO2 absorbed and the overall gas mass transfer coefficient. The results proved that the greater the aqueous ammonia concentration, the greater the percentage of CO2 absorbed. The range of 5-10% aqueous ammonia is recommended because the percentage of CO2 absorbed peaks at an average of 92% beyond the range of 5-10%.

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 Axial dispersion model in predictive mass transfer correlation for random pulsed packed column

2015 ◽  
Vol 21 (1-1) ◽  
pp. 77-83
Author(s):  
R. Teflanab ◽  
S.M. Ghoreishi ◽  
J. Safdari ◽  
M. Torab-Mostaedi
Keyword(s):  
Mass Transfer ◽  
Transfer Coefficient ◽  
Mass Transfer Coefficient ◽  
Dispersion Model ◽  
Continuous Phase ◽  
Experimental Results ◽  
Phase Flow ◽  
Flow Rates ◽  
Axial Dispersion Model ◽  
Overall Mass Transfer Coefficient

The continuous phase volumetric overall mass transfer coefficient in a ceramic intalox saddle pulsed packed extraction column using axial dispersion model was studied for two different liquid-liquid systems containing water/acetone/toluene and water/acetone/n-butyl acetate. The effects of pulsation intensity, continuous and dispersed phase flow rates on mass transfer coefficient were investigated. The experimental results indicated that the mass transfer coefficient was enhanced by increasing pulsation intensity and dispersed and continuous phase flow rates. The utilization of nonlinear least square method provided a new predictive correlation for the continuous phase overall mass transfer coefficient. The developed mass transfer model was validated via the comparison of the modeling data with experimental results with 18.7% average absolute relative error (AARE). Furthermore, one empirical correlation was developed for prediction of the continuous phase overall mass transfer coefficient as the function of the aforementioned operating variables.

Film absorption in liquids of different viscosities

1981 ◽  
Vol 46 (1) ◽  
pp. 161-172
Author(s):  
Leopold Vyoral ◽  
Vladimír Míka
Keyword(s):  
Mass Transfer ◽  
Liquid Film ◽  
Transfer Coefficient ◽  
Mass Transfer Coefficient ◽  
Experimental Results ◽  
Wavy Surface ◽  
Volumetric Mass Transfer Coefficient ◽  
Dimensionless Numbers ◽  
Surface Equation ◽  
Film Absorption

Experimental results on absorption of CO2 in liquid film flowing downwards the string of spheres are presented for liquids with viscosities in the range from 1 to 10.1 mPa s. The results correspond qualitatively to the Levich's analysis of mass transfer into the flowing film with wavy surface. Equation relating dimensionless numbers is proposed for calculation of the volumetric mass transfer coefficient.

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