Experimental Study of Carbon Dioxide Separation From Gas Mixture by Vortex Tube

2017 ◽  
Author(s):  
Younghyeon Kim ◽  
Jinwon Yun ◽  
Sangseok Yu
Keyword(s):  
Gas Separation ◽  
Carbon Capture ◽  
Vortex Tube ◽  
Vortex Generator ◽  
Co2 Concentration ◽  
Atmospheric Temperature ◽  
Energy Separation ◽  
Co2 Gas ◽  
Temperature Separation ◽  
Climate Treaty

Due to the global warming, climate treaty regulations and credits have been enhanced. As a result, the Carbon Capture & Storage (CCS) technologies have been emerged. In this study, it is presented that is separating the CO2 from Air by vortex generator. The vortex tube is a device to separate inlet gases to hotter and colder mixture than inlet by energy separation technology. In this study, the vortex tube is applied to CO2 gas separation from air that is investigated under atmospheric temperature. Prior to feasibility experiment, transient response shows that the temperature separation is settled down in 3000 seconds. Experimental parameters of gas separation are pressures and concentrations of CO2 that is mixed with air. Results show that CO2 gas separation is proportional to operating temperature. The percentage of CO2 gas separation is 7.4 % at 3barg and cold mass fraction of 0.6. The gas separation is also affected by inlet CO2 concentration.

Investigations of Energy Separation Effect in Vortex Tube for Natural Gases

2013 ◽  
Vol 397-400 ◽  
pp. 205-208
Author(s):  
Wen Chuan Wang ◽  
Xiang Jun Fang ◽  
Shi Long Liu ◽  
Wen Long Sun
Keyword(s):  
Mass Fraction ◽  
Vortex Tube ◽  
Pressure Ratio ◽  
Three Dimensional ◽  
Energy Separation ◽  
Separation Effect ◽  
Natural Gases ◽  
Temperature Separation ◽  
Total Temperature ◽  
Cold Mass

This paper aims to investigate fixed composition natural gases including N2, CH4 and C2H4 energy separation effect in vortex tube. Energy separation phenomena of those gases were investigated by means of three-dimensional Computational Fluid Dynamics (CFD) method. Flow fields of natural gases in fixed inlet boundary conditions were simulated. The results main factors were found that affect the energy separation with cold mass fraction being 0.7 and pressure drop ratio being 3.90. At the same time, this paper has illustrated the effects and tendencies of energy separation with gases in the tube under the same cold mass flow fraction and cold pressure ratio. The results show mixture gases total temperature difference effect is unchanged varied with the cold mass fraction; CH4% has no effect on the vortex cold end temperature separation, but varied of CH4% has an influence in total temperature and hot end separation effect; total temperature separation effect of CH4% was divided into two sections, one is0%-80%, and the other 80%-100%.

scholarly journals CFD Analysis of Energy Separation in Ranque-Hilsch Vortex Tube at Cryogenic Temperature

2013 ◽  
Vol 2013 ◽  
pp. 1-14 ◽  
Author(s):  
T. Dutta ◽  
K. P. Sinhamahapatra ◽  
S. S. Bandyopadhyay
Keyword(s):  
Cryogenic Temperature ◽  
Vortex Tube ◽  
Atmospheric Temperature ◽  
Working Fluid ◽  
Energy Separation ◽  
Cfd Analysis ◽  
Sensible Heat ◽  
Cfd Model ◽  
Parametric Sensitivity ◽  
Fluid Layers

Study of the energy separation phenomenon in vortex tube (VT) at cryogenic temperature (temperature range below 123 K) has become important because of the potential application of VT as in-flight air separator in air breathing propulsion. In the present study, a CFD model is used to simulate the energy separation phenomenon in VT with gaseous air at cryogenic temperature as working fluid. Energy separation at cryogenic temperature is found to be considerably less than that obtained at normal atmospheric temperature due to lower values of inlet enthalpy and velocity. Transfer of tangential shear work from inner to outer fluid layers is found to be the cause of energy separation. A parametric sensitivity analysis is carried out in order to optimize the energy separation at cryogenic temperature. Also, rates of energy transfer in the form of sensible heat and shear work in radial and axial directions are calculated to investigate the possible explanation of the variation of the hot and cold outlet temperatures with respect to various geometric and physical input parameters.

scholarly journals Numerical modeling of the effect of energy-separation in the ranque-hilsch tube

2020 ◽  
Vol 27 ◽  
pp. 00109
Author(s):  
Boris L. Ivanov ◽  
Bulat G. Ziganshin ◽  
Andrey V. Dmitriev ◽  
Maxim A. Lushnov ◽  
Manuel O. Binelo
Keyword(s):  
Gas Flow ◽  
Vortex Tube ◽  
Turbulence Models ◽  
Effect Of Temperature ◽  
Energy Separation ◽  
Hydrodynamic Characteristics ◽  
Two Phase ◽  
Cross Sectional ◽  
Model Calculations ◽  
Temperature Separation

Currently, there are a lot of applications of vortex technologies. The vortex effect is used in gasdynamic cold generators and vortex cooling chambers. Vortex devices are also used as dehumidifiers, separators, for cooling and heating hydraulic fluids, separating two-phase media, gas mixtures, evacuating, etc. Scientists study the applicability of vortex equipment for traditional and freeze-drying of agricultural products. However, the influence of geometric parameters of vortex devices on the productivity and energy efficiency of temperature separation of gas flows is poorly studied. Research aimed at finding opportunities and expanding the field of application of vortex tubes is an urgent task. The paper describes twodimensional and three-dimensional mathematical models of the swirling gas flow arising in a vortex tube. It presents results of its implementation in the Anсs-Fluent software package. Thermodynamic and hydrodynamic characteristics confirm the effect of temperature separation in a vortex tube. The dependences of temperature separation on the swirl angle and inlet pressure were obtained. For a two-dimensional vortex tube model, calculations were carried out using various turbulence models. The influence of the cross-sectional area at the hot gas flow outlet on temperature separation was studied.

Numerical Modelling of Turbulent Flow in Vortex Tube

2010 ◽  
Author(s):  
Hossein Khazaei ◽  
Iman Mirzaii ◽  
Ali reza Teymourtash
Keyword(s):  
Vortex Tube ◽  
Complex Structure ◽  
Small Diameter ◽  
Energy Separation ◽  
Geometrical Parameters ◽  
Turbulent Model ◽  
Cfd Model ◽  
Governing Equations ◽  
Temperature Separation ◽  
Structure Of Flow

In this paper, energy separation effect in a vortex tube has been investigated using a CFD model. The numerical simulation has been done due to the complex structure of flow. The governing equations have been solved by FLUENT™ code in 2D compressible and turbulent model. The effects of geometrical parameters have been investigated. The results have shown that the hot outlet size and its shape, does not affect the energy distribution in vortex tube and very small diameter will decrease the temperature separation.

scholarly journals Natural gas sweetening polymeric membrane: Established optimum operating condition at 70% of CO2 concentration feed gas stream

2020 ◽  
Vol 16 (1) ◽  
pp. 54-58
Author(s):  
M. H. M. Halim ◽  
F. Kadirkhan ◽  
W. N. F. W. Mustapa ◽  
W. K. Soh ◽  
S. Y. Yeo
Keyword(s):  
Natural Gas ◽  
Gas Separation ◽  
Co2 Concentration ◽  
Operating Conditions ◽  
Separation Performance ◽  
Co2 Gas ◽  
High Co2 ◽  
Gas Sweetening ◽  
Gas Separation Performance ◽  
Natural Gas Sweetening

PETRONAS embarks on breakthrough technology for natural gas sweetening in high CO2 gas fields. Membrane technology is found to be one with high potential and a promising technology for bulk CO2 removal from natural gas. It can be suited to wide operating conditions to process varied natural gas composition, pressure and temperature. This paper focuses on the extensive development of PETRONAS in-house membrane and its evaluation for gas separation performance for high CO2 feed gas at different operating conditions; eg. feed gas flowrate, temperature, pressure, CO2 concentration in mixed gas system, and permeate pressure. For all the cases in this study, samples were tested at optimum gas flowrate of 1000 standard cm3/min (sccm) to obtain representative membrane performance. Feed gas pressure and CO2 concentration have shown significantly affect membrane permeation properties; whereas feed gas temperature and permeate pressure showed negligible impact. There is a trade-off between permeance and selectivity when CO2 concentration is increased from 40% to 70%; where the CO2 permeance increased by 12% which consequently reduces CO2/CH4 selectivity by 15%. In summary, the membrane developed in this study demonstrates high pressure durability up to 50 bar and temperature up to 55oC with satisfactory gas separation performance in the presence of high CO2 concentration in feed gas (up to 70% CO2). This work is breakthrough in establishing the operational boundary of PETRONAS Membrane for technology development and deployment in monetizing high CO2 gas field.

Aerodynamic and thermal characteristics of a maxwell type vortex tube

2011 ◽  
Vol 1 (4) ◽  
Author(s):  
S. Rahman ◽  
A. Mujumdar
Keyword(s):  
Vortex Tube ◽  
Fluid Dynamic ◽  
Flow Behavior ◽  
Three Dimensional ◽  
Thermal Characteristics ◽  
Turbulence Models ◽  
Computational Fluid Dynamic Simulation ◽  
Energy Separation ◽  
Numerical Predictions ◽  
Temperature Separation

AbstractA three-dimensional (3D) computational fluid dynamic simulation of a vortex tube is carried out to examine its flow and thermal characteristics. The aim of this work is to model the performance of the vortex tube and to capture the highly swirling compressible flow behavior inside the tube for an understanding of the well known temperature separation process. Simulations were carried out using the standard k-ɛ, k-omega, RNG k-ɛ and swirl RNG k-ɛk-ɛ turbulence models. An experimental setup was built and tested to validate the simulation results. The RNG k-ɛ turbulence model yielded better agreement between the numerical predictions and experimental data. This model captured well the essential features of the flow including formation of the outer vortex and the inner reverse vortex flow. Flow and geometric parameters that affect the flow behavior and energy separation are studied numerically. Effects of the inlet pressure, with and without an insert in the tube, are examined by numerical experiments.

Overview of Axial Compression Technology for Direct Capture of CO2

2013 ◽  
Vol 744 ◽  
pp. 392-395 ◽  
Author(s):  
Hao Xian Malcolm Chan ◽  
Eng Hwa Yap ◽  
Jee Hou Ho
Keyword(s):  
Axial Compression ◽  
Carbon Capture ◽  
Carbon Capture And Storage ◽  
Co2 Concentration ◽  
Point Sources ◽  
Direct Capture ◽  
Rate Of Increase ◽  
Air Capture ◽  
Key Issues ◽  
And Storage

Carbon Capture and Storage (CCS) is one of the global leading methods that could potentially retard the speed of climate change. However, CCS on point sources can only slowdown the rate of increase of atmospheric CO2 concentration. In order to mitigate CO2 released by previous emissions, a more proactive alternative is proposed where CO2 is directly extracted and captured from air Direct Air Capture (DAC). This paper presents a technical overview from our current research of a novel DAC concept which features a phase of axial compression to adapt pre-capture atmospheric air to a level suitable for carbon capture. Also detailed in the paper is the feasibility study addressing several key issues: the energy consumption and overall capturing efficiency of the proposed DAC system.

scholarly journals Preparation and gas permeability of the surface-modified porous Al2O3 ceramic filter for CO2 gas separation

2013 ◽  
Vol 1 (1) ◽  
pp. 65-70 ◽  
Author(s):  
Toshihiro Isobe ◽  
Mai Shimizu ◽  
Sachiko Matsushita ◽  
Akira Nakajima
Keyword(s):  
Gas Separation ◽  
Gas Permeability ◽  
Ceramic Filter ◽  
Co2 Gas ◽  
Al2o3 Ceramic ◽  
Surface Modified
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