Loading...
Search for:
water-stability
0.007 seconds
Energy and exergy analysis of intensified condensate stabilization unit with water draw pan
, Article Applied Thermal Engineering ; Volume 155 , 2019 , Pages 49-58 ; 13594311 (ISSN) ; Hosseini, S. H ; Ahmadi, G ; Sharif University of Technology
Elsevier Ltd
2019
Abstract
An industrial condensate stabilizer unit is simulated with HYSYS 3.1 software when the excessive water is present on the trays. Effects of reboiler temperature, excess water flow rate, and incoming stream temperature on the Reid vapor pressure (RVP), temperature distribution along the column and impurity concentrations along the stabilization column, as well as, energy usage are studied. In addition, the optimal location for the water draw tray for the condensate stabilizer column is found. It is observed that the presence of water draw pan in the column leads to about 15% and 28% reduction, respectively, in the reboiler and the compressor duties compared to the industrial case without water...
Selective dye adsorption by highly water stable metal-organic framework: Long term stability analysis in aqueous media
, Article Applied Surface Science ; Volume 445 , 2018 , Pages 424-436 ; 01694332 (ISSN) ; Hakimian, A ; Shojaei, A ; Raeiszadeh, M ; Sharif University of Technology
Elsevier B.V
2018
Abstract
A highly water stable metal-organic framework (MOF) based on zirconium, i.e. UiO-66, was synthesized and then employed to adsorptive removal of an anionic dye, methyl orange (MO), and a cationic dye, methylene blue (MB), from aqueous solution. In this work, for the first time, the long term stability of UiO-66 in water was investigated for 12 months. X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM) and N2 adsorption/desorption analysis were employed to monitor the textural alteration of UiO-66 during water aging. The results indicated that the structure of UiO-66 was mostly retained and its adsorption capacity toward dyes exhibited minor loss after long term water...
A comprehensive study of basalt fiber reinforced magnesium phosphate cement incorporating ultrafine fly ash
, Article Composites Part B: Engineering ; Volume 168 , 2019 , Pages 204-217 ; 13598368 (ISSN) ; Chen, B ; Yu, J ; Sharif University of Technology
Elsevier Ltd
2019
Abstract
This study investigated the influence of ultrafine fly ash (FA) on the mechanical properties, elevated temperature resistance and water stability of basalt fiber reinforced magnesium phosphate cement, and synergy mechanism was examined with the help of X-ray diffraction (XRD), thermogravimetric analysis (TGA), mercury intrusion porosimeter (MIP) and scanning electron microscopy energy dispersive spectroscopy (SEM/SEM-EDS) analysis techniques. Experimental results showed that incorporation of FA improved the mechanical properties, temperature resistance and water stability of MPC composites. TGA results exhibited that the mass loss of MPC composites was gradually reduced by increasing the...
UiO-66 metal–organic frameworks in water treatment: A critical review
, Article Progress in Materials Science ; Volume 125 , 2022 ; 00796425 (ISSN) ; Molavi, H ; Rezakazemi, M ; Tajahmadi, S ; Bahi, A ; Ko, F ; Aminabhavi, T. M ; Li, J. R ; Arjmand, M ; Sharif University of Technology
Elsevier Ltd
2022
Abstract
Metal-organic frameworks (MOFs) have recently achieved much attention to eliminating toxic pollutants because of their attractive attributes, including large specific surface area, ultra-high porosity, abundant active adsorption sites, tunable surface chemistry, well-controlled pore size distribution, and strong host–guest interactions. Among the many developed MOFs, the Zr-based MOFs, particularly the UiO-66 family, are considered extremely attractive for wastewater treatment applications. The fascinating properties of UiO-66 such as high thermal stability, superior chemical resistance towards several solvents, including benzene, acetone, different alcohols, dimethylformamide, acidic and...