Search for: hybridization-process
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    Energy consumption in pervaporation, conventional and hybrid processes to separate toluene and i-octane

    , Article Chemical Engineering and Processing - Process Intensification ; Volume 128 , June , 2018 , Pages 46-52 ; 02552701 (ISSN) Khazaei, A ; Mohebbi, V ; Mosayyebi Behbahani, R ; Ramazani Saadat Abadi, A ; Sharif University of Technology
    Elsevier B.V  2018
    Chemical industries need to employ new process designs due to environmental policies and energy optimization because of the global energy challenge. Pervaporation has been introduced as a promising alternative for conventional processes such as distillation, known as energy intensive process, in chemical plants. In this work, the energy consumption of different processes for separation of toluene and i-octane (representatives of aromatics and aliphatic mixtures) has been evaluated, based on our previous laboratory pervaporation experiments using Polyvinyl alcohol/Graphene oxide mixed matrix membranes. Accordingly, hybrid distillation-pervaporation and cascade pervaporation systems have been... 

    Data-based modeling and optimization of a hybrid column-adsorption/depth-filtration process using a combined intelligent approach

    , Article Journal of Cleaner Production ; Volume 236 , 2019 ; 09596526 (ISSN) Salehi, E ; Askari, M ; Aliee, M. H ; Goodarzi, M ; Mohammadi, M ; Sharif University of Technology
    Elsevier Ltd  2019
    Lack of robust techniques for optimization of hybrid separation systems is obvious in the literature. A novel hybrid approach for modeling and optimization of a hybrid process consisting of fixed-bed adsorption column (FBAC) and dead-end filtration (DEF) for the removal of methylene blue from water was presented. Artificial neural network (ANN), response surface methodology (RSM) and genetic algorithm (GA) were used for this purpose. ANN was employed to successfully approximate the breakthrough curves. Central composite design was used to investigate the impact of the operating variables, i.e. feed flowrate, initial concentration, adsorption bed length, and filter type on the removal rate as... 

    Treatment of welding electrode manufacturing plant wastewater using coagulation/flocculationnanofiltration as a hybrid process

    , Article Brazilian Journal of Chemical Engineering ; Volume 28, Issue 1 , Mar , 2011 , Pages 73-79 ; 01046632 (ISSN) Golestani, H. A ; Mousavi, M ; Borghei, M ; Sharif University of Technology
    High water consumption and water scarcity make industrial wastewater reuse necessary, especially in those industries characterized by polluted effluents such as welding electrode manufacturing industries. The present paper investigates the coupling of coagulation-flocculation with nanofiltration (NF) to recycle water and reuse it in the process. First, the effect of different concentrations of a mixture of alum (Al2(SO4) 3.18H2O) and ferric chloride (FeCl3) on the pretreatment process was closely studied. Then the NF process was applied for complementary treatment. The NF results show that, by increasing both flow rate and transmembrane pressure (TMP), permeate flux is increased. The NF... 

    Comparison among various configurations of hybrid distillation–membrane setups for the energy efficiency improvement of bioethanol distillery: a simulation study

    , Article Journal of Chemical Technology and Biotechnology ; October , 2021 ; 02682575 (ISSN) Iftikhar, S ; Aslam, Z ; Ali, U ; Akhtar, A ; Sharif University of Technology
    John Wiley and Sons Ltd  2021
    BACKGROUND: Hybrid distillation–membrane setups have attracted attention in recent years due to their lower energy usage for ethanol purification. Membrane separation processes operate without heating that reduces energy demand. However, it is somewhat challenging to select the optimal material and process for a membrane purifying ethanol, especially to get an ethanol purity of 99.99% with maximum recovery. RESULTS: In this study, three different configurations of hybrid distillation–membrane setups are proposed consisting of distillation–pervaporation/vapor permeation processes by considering ceramic, polymeric and composite membranes. The design of hybrid processes is performed by coupling... 

    The field effect transistor DNA biosensor based on ITO nanowires in label-free hepatitis B virus detecting compatible with CMOS technology

    , Article Biosensors and Bioelectronics ; Volume 105 , 15 May , 2018 , Pages 58-64 ; 09565663 (ISSN) Shariati, M ; Sharif University of Technology
    Elsevier Ltd  2018
    In this paper the field-effect transistor DNA biosensor for detecting hepatitis B virus (HBV) based on indium tin oxide nanowires (ITO NWs) in label free approach has been fabricated. Because of ITO nanowires intensive conductance and functional modified surface, the probe immobilization and target hybridization were increased strongly. The high resolution transmission electron microscopy (HRTEM) measurement showed that ITO nanowires were crystalline and less than 50 nm in diameter. The single-stranded hepatitis B virus DNA (SS-DNA) was immobilized as probe on the Au-modified nanowires. The DNA targets were measured in a linear concentration range from 1fM to 10 µM. The detection limit of...