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115 results on '"Lababidi, Haitham"'

16. Numerical Prediction of Background Buildup of Salinity Due to Desalination Brine Discharges into the Northern Arabian Gulf

Author

Massachusetts Institute of Technology. Department of Mechanical Engineering, Massachusetts Institute of Technology. Department of Civil and Environmental Engineering, Parsons Laboratory for Environmental Science and Engineering (Massachusetts Institute of Technology), Chow, Aaron C., Verbruggen, Wilbert, Morelissen, Robin, Al-Osairi, Yousef, Ponnumani, Poornima, Lababidi, Haitham M. S., Al-Anzi, Bader, Adams, E. Eric, Massachusetts Institute of Technology. Department of Mechanical Engineering, Massachusetts Institute of Technology. Department of Civil and Environmental Engineering, Parsons Laboratory for Environmental Science and Engineering (Massachusetts Institute of Technology), Chow, Aaron C., Verbruggen, Wilbert, Morelissen, Robin, Al-Osairi, Yousef, Ponnumani, Poornima, Lababidi, Haitham M. S., Al-Anzi, Bader, and Adams, E. Eric

Abstract

Brine discharges from desalination plants into low-flushing water bodies are challenging from the point of view of dilution, because of the possibility of background buildup effects that decrease the overall achievable dilution. To illustrate the background buildup effect, this paper uses the Arabian (Persian) Gulf, a shallow, reverse tidal estuary with only one outlet available for exchange flow. While desalination does not significantly affect the long-term average Gulf-wide salinity, due to the mitigating effect of the Indian Ocean Surface Water inflow, its resulting elevated salinities, as well as elevated concentrations of possible contaminants (such as heavy metals and organophosphates), can affect marine environments on a local and regional scale. To analyze the potential effect of background salinity buildup on dilutions achievable from discharge locations in the northern Gulf, a 3-dimensional hydrodynamic model (Delft3D) was used to simulate brine discharges from a single hypothetical source location along the Kuwaiti shoreline, about 900 km from the Strait of Hormuz. Using nested grids with a horizontal resolution, comparable to a local tidal excursion (250 m), far field dilutions of about 28 were computed for this discharge location. With this far field dilution, to achieve a total dilution of 20, the near field dilution (achievable using a submerged diffuser) would need to be increased to approximately 70. Conversely, the background build-up means that a near field dilution of 20 yields a total dilution of only about 12.

Published
2020

29. Modeling the Hydrocracking Kinetics of Atmospheric Residue in Hydrotreating Processes by the Continuous Lumping Approach

Author

Lababidi, Haitham M. S. and AlHumaidan, Faisal S.

Abstract

The primary objective of this work is to study the hydrocracking associated with the hydrotreatment of atmospheric residue (AR) feedstock and develop a kinetic model describing the undergoing cracking reactions. Experimental data were obtained for three types of conventional hydrotreating catalysts [hydrodesulfurization (HDS), hydrodemetalization (HDM), and hydrodenitrogenation (HDN)] at three space velocities and three operating temperatures. The developed kinetic cracking model is based on the continuous lumping approach, which assumes a continuous concentration and reactivity of the reacting mixtures. Species concentrations were represented as an integro-differential equation with only five modeling parameters. The developed continuous lumping models predicted the concentration profile of the complete true boiling point (TBP) range with reasonably high accuracy. Analysis of experimental results indicated that upgrading of residual fractions is achieved through both catalytic and thermal conversion, where the extent of each depends upon the catalyst type and operating conditions. The yield of the distillate fraction was found to be the highest for the HDN catalyst followed by HDS and HDM catalysts.

Published
2024
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32. Environmental ranking of desalination plants: the case of the Arabian Gulf.

Author

Al-Sharrah, Ghanima, Lababidi, Haitham M.S., and Al-Anzi, Bader

Subjects
*SALINE water conversion plants, *ENVIRONMENTAL indicators, *WATER shortages, *GEOLOGICAL basins, PERSIAN Gulf environmental conditions
Abstract

Performance indicators and ranking methods are effective tools for assessing the environmental impact of emerging technologies and comparing the operational efficiencies of different processes. Desalination of seawater, which is vital for solving the water shortage in the Arabian Gulf region, should be assessed due to its adverse environmental impacts on the shallow and closed Gulf basin. The main objective of the current work is to develop and implement an environmental assessment methodology capable of ranking alternative desalination processes and technologies based on their environmental performance. The proposed methodology starts with identification of relevant indicators and uses the relative ranking of desalination plants together with an aggregated environmental index. The assessment approach was tested on selected desalination plants in the Arabian Gulf region. The results showed that the ranking methods are effective in aggregating the influence of individual indicators to produce a numerical value that indicates the rank of studied desalination plants with respect to their environmental impact. [ABSTRACT FROM PUBLISHER]

Published
2017
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50. épée: a process engineering software environment

Author

Ballinger, Geoffrey H, primary, Bañares-Alcántara, René, additional, Costello, Des, additional, Fraga, Eric S, additional, Krabbe, Jens, additional, Lababidi, Haitham, additional, Laing, D Murray, additional, McKinnel, Rory C, additional, Ponton, Jack W, additional, Skilling, Neil, additional, and Spenceley, Martin W, additional

Published
1994
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