مرور Volume 47, Issue 1 بر اساس عنوان

  • CFD Simulation of Concap Tray Hydrodynamics 

    Ostadzehi, Mohammed Rahim؛ Rahimi, Rahbar؛ Zarei, Taleb؛ Zivdar, Mortaza (University of Tehran, 2013-06-01)
    This research includes both experimental and CFD investigation in the hydrodynamic behavior of a new type of column tray introduced as “Concap" tray. The proposed column tray is used in contactor columns especially in ...

  • COD Removal Prediction of DAF Unit Refinery Wastewater by Using Neuro- Fuzzy Systems (ANFIS) (Short Communication) 

    Vasseghian, Yasser؛ Ahmadi, Mojtaba؛ Gholami, Rashid؛ Aghaali, Sajad (University of Tehran, 2013-06-01)
    In this study the Dissolved Air Flotation (DAF) system in oil refinery was investigated for the treatment of refinery wastewater. In order to investigate sytem a labratory scale rig was built. The aim is to remove some of ...

  • Effect of Bubble/Droplet Morphology and Slippage on Attachment Induction Time in Deoiling Flotation Process 

    Eftekhardadkhah, Mona؛ Hashemabadi, Seyed Hassan (University of Tehran, 2013-06-01)
    A modified model has been analytically developed to describe the induction time of an elliptic air bubble in contact with an elliptic hydrophobic oil droplet. The role of hydrophobicity was revealed in the slippage of ...

  • A New Correlation for Prediction of Wax Disappearance Temperature of Hydrocarbon Mixtures at Various Pressures 

    Moradi, Gholamreza؛ Mohadesi, Majid؛ Mokhtari, Mojtaba (University of Tehran, 2013-06-01)
    Wax precipitate is one of the most serious issues the oil industry is currently facing, since it can cause some troubles such as increasing of the pressure losses in pipe which subsequently increases the required power for ...

  • Production of Activated Carbon from Cellulose Wastes 

    Hafizi-Atabak, Hamid Reza؛ Ghanbari- Tuedeshki, Hamid؛ Shafaroudi, Anita؛ Akbari, Mahdi؛ Safaei-Ghomi, Javad؛ Shariaty-Niassar, Mojtaba (University of Tehran, 2013-06-01)
    Cellulose wastes of a wood and paper factory were used to produce activated carbon. Several chemical agents under various conditions were used for production of activated carbon and hence their adsorption properties have ...

  • Wellbore Stability in Shale Formation Using Analytical and Numerical Simulation 

    Taheri Shakib, Jaber؛ Jalalifar, Hossein؛ Akhgarian, Ebrahim (University of Tehran, 2013-06-01)
    Optimization of drilling fluid parameters such as mud weight, salt concentration, and temperature is essential to alleviate instability problems during drilling through shale sections. The selection of suitable mud parameters ...