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Articles by K.M. Sabil
Total Records ( 5 ) for K.M. Sabil
  N. Azmi , H. Mukhtar and K.M. Sabil
  High carbon dioxide (CO2) content in natural gas may constitute some environmental hazards when release to the atmosphere. A variety of conventional separation methods are presently being used to remove the undesired gas fraction from crude natural gas. One promising approach to capture CO2 from natural gas is by formation of gas hydrate. Gas hydrates can be formed in a system containing water and small molecule gases such as CH4 and CO2 at appropriate pressure and temperature conditions. It is important to gain accurate data of the phase behavior of the gas hydrate forming systems to ensure that the process conditions are set in hydrate forming conditions. In this study, thermodynamics modeling approached is implemented to generate the phase equilibria data since the phase behavior measurements are often expensive, tedious and time consuming processes. The thermodynamic program, CSMGem is successfully used for prediction of equilibrium conditions for single and binary hydrate former systems with AAD% is less than 10%. The program is being further used to predict gas hydrate equilibrium for natural gas with different concentration of CO2.
  K.M. Sabil , N. Azmi and H. Mukhtar
  The enticing characteristics of carbon dioxide hydrates initiate numerous research activities around the globe and in a wide variety of fields from carbon dioxide sequestration to cool storage applications. A general introduction to clathrate hydrates and carbon dioxide hydrates in particular has been discussed. The motivations behind carbon dioxide hydrate research and the general fields of interest for these compounds are briefly explained in this study.
  Qazi Nasir , K.M. Sabil and Khashayar Nasrifar
  Dew point and bubble measurements is carried out using Hydreval and PVT equipment. Experimental data for both dew and bubble point is collect with temperature ranges from -20 to 5°C with pressure of 0 to 10 MPa. Mathematical model based on cubic PR Equation of State (EOS) couple with van der Waals classical mixing rule is applied to these experiment data points, A comparison shows a close match between experimental data point and model prediction with low (%) AADP.
  S.N.A. Malik , K.M. Sabil and M.I.A. Mutalib
  The kinetics of formation of methane hydrate in deionised water in presence of Potassium Oxalate Monohydrate (POM) is studied in a batch reactor which is designed and built for a laboratory scale used. In this experimental study, the formation of methane hydrate in deionised water (18Ω) is investigated at fixed temperature of 273.15 K and pressures of 65, 60, 55, 50, 40 bar, respectively. The formation of methane hydrates in POM solutions are investigated by using various concentrations of POM up to 2000 ppm at temperature of 273.15 K and 65 bar presure. For methane hydrate, the induction time decreases with the increase of initial pressure due to the increase of sub cooling and driving force in the system. Moreover, experimental results show that the addition of POM reduces the induction time required for hydrate formation and significantly increases the carbon dioxide and methane uptake and these effects are concentration dependant. Furthermore, the addition of POM in the hydrate forming systems has been shown to improve the apparent rate constant of the system.
  O. Nashed , K.M. Sabil , L. Ismail and A. Jaafar
  In this study, the simple gas hydrate equilibrium conditions of methane and carbon dioxide in water were measured by using high pressure micro DSC (why is the advantage). The technique was chosen because it is economic, fast and accurate. In this study, the methane hydrate equilibrium conditions were measured at pressure between 35-112 bar and temperature between 276-288 K. In addition, the carbon dioxide hydrate equilibrium conditions were measured at pressure between 15-37 bar and temperature between 274-282.5 K. The measured data was compared to the available literature data and the AADT % between the measured data and predicted model was calculated. Good agreements were obtained between the measured and literature data. The AADT% between the measured data and predicted models is less than 0.07% for CH4 hydrate and 0.15% for CO2 hydrate.
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