Go to the main menu
Skip to content
Go to bottom
REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
> Journal Vol & Issue
Journal of the Korean Institute of Gas
Journal Basic Information
Journal DOI :
The Korean Institute of GAS
Editor in Chief :
Volume & Issues
Volume 10, Issue 4 - Dec 2006
Volume 10, Issue 3 - Sep 2006
Volume 10, Issue 2 - Jun 2006
Volume 10, Issue 1 - Mar 2006
Selecting the target year
Photodecomposition Properties of Formaldehyde Using PS Nanofiber and Photocatalyst
An H.H. ;
Journal of the Korean Institute of Gas, volume 10, issue 2, 2006, Pages 1~6
In this study we proposed on effect of the photodecomcomposition of coated nanofiber by
for the removal of formaldehyde gas as indoor air pollutant. The photocatalytic reactor was setup in the inside of rectangular box (volume 2 l), UV lamp and the coating nanofiber with
. This study investigated the reaction rate and the adsorption constant of Langmuir-Heinshelwood, conversion of formaldehyde gas on temperature (
), effect of conversion (%) under different concentration, and effect of conversion (%) with humidity level on added
gas. As results, the rate constant (k) and adsorption constant (ft) were 114.94ppmv/min,
, respectively. and the conversion (%) of formaldehyde gas on temperature (
) was decreased to about 24%, compare with the first conversion (%). In conversion effect of increasing humidity levels, the presence of sulfur dioxide further decreased than without sulfur dioxide. the decreasing reason of conversion with presence sulfur dioxide judged as a cause of interference factor on the decrease of contact chance with photocatalysts.
Prediction of Temperature Dependence of Explosion Limits and Interrelationship of Explosion Characteristics for Akylketones
Ha Dong-Myeong ;
Journal of the Korean Institute of Gas, volume 10, issue 2, 2006, Pages 7~13
In order to evaluate the fire and explosion involved and to ensure the safe and optimized operation of chemical processes, it is necessary to know combustion characteristics. The explosion limit, the heat of combustion, flame temperature and temperature dependence of the lower explosive limit are the major combustion characteristics used to determine the fire and explosion hazards of the flammable substances. The aim of this study is to investigate interrelationship of explosion characteristics and the temperature dependence of the lower explosion limit at elevated temperature for akylketones. By using the reference data, the empirical equations which describe the interrelationships of explosion properties of akylketones have been derived. Also, the new equations using the mathematical and statistical methods for predicting the temperature dependence of lower explosion limits of akylketones on the basis of the literature data are proposed. The values calculated by the proposed equations agreed with literature data within a few percent. From the given results, using the proposed methodology, it is possible to predict the explosion limits of the other flammable substances.
Effect of Membrane Material and Absorbent Type on
Removal Using Microporous Hollow-fiber Membrane G-L Contactors
Song Hee-Ouel ; Kim In-Won ; Park Hyun-Hee ; Lim Chun-Won ; Jo Hang-Dae ; Lee Hyung-Keun ;
Journal of the Korean Institute of Gas, volume 10, issue 2, 2006, Pages 14~21
An experimental apparatus for the removal of
gas using microporous hollow-fiber membrane G-L contactors was setup. Various performance experiments were carried out with commercial membrane modules and the membrane modules made by KIER. The
removal efficiency was outstanding. When the hollow-fiber membrane was used for the removal of
, the selection of absorbers and additives, membrane material, operating conditions of membrane manufacture were significant variables to develop optimal G-L contactors. More experiment works will be done for the development of compact, cost-effective and better G-L contactors.
Simulation of Separation and Purification Process of 50 kg/day Pilot Plant for DME Production
Cho Jung-Ho ; Cho Won-Il ; Na Young-Jin ; Shin Dong-Keun ; Rhim Kye-Kyu ;
Journal of the Korean Institute of Gas, volume 10, issue 2, 2006, Pages 22~26
In this study, modeling and simulation works using Aspen Plus were carried out for DME separation and purification process of pilot plant for the daily production of 50 kg of DME. For modeling of the entire DME separation unit, NRTL liquid activity coefficient model was used for the prediction of liquid phase non-idealities, Henry's law option was also used for the estimation of solubilities of light gases in solvents and SRK equation of state model was utilized for the description of vapor phase non-idealities. DME having over 98 wt% purity was obtained as a side distillate product in a DME purification column.
Finite Element Analysis of Contact Behavior Characteristics in LPG Filling Unit Depending on Multi-ball/Cylinder Rolling Friction Motions
Kim Chung-Kyun ;
Journal of the Korean Institute of Gas, volume 10, issue 2, 2006, Pages 27~32
In this paper, the contact stress and friction force between multi-balls and rolling friction contact surfaces of two cylinders have been presented using a finite element analysis. The multi-balls for a rolling friction motion may be contacted with a reciprocating mechanism of a parallel cylinder and a misaligned cylinder in a LPG filling unit. The FEM computed results indicate that SiC ceramic and SUS 304 balls show a high contact stress and friction force on the contact spot of rolling balls. But the PEEK balls show a low contact stress and friction loss due to a high flexibility of a PEEK polymer. In this study, we may recommend SiC and SUS 304 balls for high compressive loadings between a multi-ball and a cylinder contact mechanisms and PEEK balls for a low compressive force. And the misalignment between two cylinders should be restricted for a low contact stress and friction loss, especially.
A Study on Fire and Explosion Characteristics of Propane Gas
Ha Dong-Myeong ;
Journal of the Korean Institute of Gas, volume 10, issue 2, 2006, Pages 33~39
For the safety design and operation of many gas process, it is necessary to know certain explosion limit, flash point, auto ignition temperature and minimum oxygen concentration of handling substances. Also it is necessary to know explosion limit at high temperature and pressure. For the safe handling of propane, explosion limit and autoignition temperature of combustion characteristics for propane were investigated. By using the literatures data, the lower and upper explosion limits of propane recommended 2.0 vol% and 10.0 vol%, respectively. Also autoignition temperatures of propane with ignition sources recommended
at the electrically heated cruicible fumace(the whole surface heating) and recommended about
at the local hot surface. The new equations for predicting the temperature and the pressure dependence of the explosion limits of propane are proposed. The values calculated by the proposed equations were a good agreement with the literature data.
Optimized Design of O-ring Groove in LPG Filling Unit Using Taguchi Experimental Method
Kim Chung-Kyun ;
Journal of the Korean Institute of Gas, volume 10, issue 2, 2006, Pages 40~46
In this paper, the optimized design of a rectangular O-ring groove has been analyzed for a maximum Cauchy stress and maximum strain using the Taguchi method. This method may efficiently optimize the design parameters for an O-ring groove of a LPG filling unit. The computed FEM results indicate that the optimized design parameters can only be drawn by nine experimental numbers of iterations when the Taguchi design technique has been employed with a finite element method. This means that the Taguchi design method is very useful for the optimization design of O-ring rectangular groove geometry. Based on the computed FEM results by the Taguchi design technique, the dimensions of a groove geometry are given as h=2.5 mm, d=2.74 mm, c=0.15 mm, and w=3.0 mm. In this study, the initial compression ratio of O-rings is recommended as 8.7% for a gas supply pressure of 18
A Measure for the Improvement Status of Process Safety Culture in the Chemical Process Industries
Baek Jong-Bae ;
Journal of the Korean Institute of Gas, volume 10, issue 2, 2006, Pages 47~54
The immediate causes of accidents are often identified as human error or technical failure but the investigation and analysis of the circumstances surrounding major industrial accidents such as Three Mile Island, Chemobyl and Kings Cross have revealed issues beyond the immediate causes. These issues relate to wider considerations of the safety culture. The safety culture of an organization is very complex and hard to study, but it is possible to examine norms that make up the culture. This paper focuses on environmental attitudes and actions among managerial and non-managerial workers in high risk industry such as chemical industries. The main purpose is to get a better understanding of safety culture and to develop measuring tool by examining their nature and strength and by analysing underlying factors that offer explanations for attitudinal differences.
Time-Efficient, Repetitive Predictions of the Performance of PEMFCs Based on a Neural Network-Based, Reduced Order Model
Shin Dong-Il ; Oh Tae-Hoon ; Park Myong-Nam ; Rengaswamy Raghunathan ;
Journal of the Korean Institute of Gas, volume 10, issue 2, 2006, Pages 55~60
Detailed modeling of PEMFCs has been getting considerable interest for predicting the fuel cell performance and also for use in various systems engineering activities. While CFD-based equipment models provide detailed analyses of the performance, they are very time-consuming to develop and run. The computations become quite complex when such models have to be embedded into the flowsheet-level optimization of fuel cell systems. In this paper, we present results about building and using NN-based reduced order models for quickly and repetitively predicting the flow of reactants in a PEMFC manifold.
Study for Field Inspection of Phase-Array Ultrasonic for Electro-fusion Joints of Polyethylene Gas Pipes
Kil Seong-Hee ; Kwon Jeong-Rock ; Park Kyo-Shik ;
Journal of the Korean Institute of Gas, volume 10, issue 2, 2006, Pages 61~67
We developed the ultrasonic phased array technique for obtaining ultrasonic images of electrofusion joints of polyethylene piping. And we inspected 4 cases at fields with this technique. First case is for the 300 mm diameter polyethylene electrofusion joint by using 3.5 MHz phased array sensor, second is for the 350 mm diameter saddle electrofusion joint, third is for the 400 mm diameter electrofusion joints and the last one is for the 400 mm diameter piping joints which will be used at 300 kPa suppling pressure.