Browsing Chemical Engineering Research by Publication Date
Now showing items 1-20 of 420
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Diffusion of saturated hydrocarbons in low density polyethylene (LDPE) films
( Wiley Subscription Services, Inc. , 1989 , Article)The diffusion coefficients at zero penetrant concentration, D0, of n-heptane, n-heptane, n-octane, n-decane, and 2,2,4-trimethylpentane (TMP) in LDPE were obtained in the range of 25–50°C, using the desorption method. The ... -
Dynamic behavior of mixer-settlers
( Wiley Subscription Services, Inc., A Wiley Company , 1990 , Article)A mathematical model has been developed to simulate and predict the dynamic behavior of liquid extraction counter current operations in mixer-settler units. Murphree efficiency has been included in the model. The behavior ... -
Thermal dimensional stability of isotropic polyoxymethylene
( John Wiley & Sons, Ltd. , 1991 , Article)A parametric mapping analysis of the effect of various structural and morphological parameters on the thermal dimensional stability of polyoxymethylene is highlighted. The molecular composites model is found to describe ... -
Ultrasonic and thermal properties of γ-irradiated low-density polyethylene
( John Wiley & Sons, Inc. , 1993 , Article)The ultrasonic pulse-echo technique and differential thermal analysis were utilized to characterize and to monitor the effect of ?-irradiation on the sonic modulus and the heat effect of low-density polyethylene. The sonic ... -
Structure-thermal expansivity relation for isotropic polyoxymethylene sheets
( John Wiley & Sons, Ltd. , 1994 , Article)A detailed parametric mapping analysis of the thermal expansion coefficient for isotropic polyoxymethylene is presented. The molecular composite model has been computerized to investigate the variation of the thermal ... -
Analysis of the thermal expansion behavior of oriented polyoxymethylene sheets
( Wiley Subscription Services, Inc., A Wiley Company , 1996 , Article)The applicability of the molecular composite model is extended to include the analysis of the thermal expansion behavior of oriented (anisotropic) polyoxymethylene. The model accounts for changes in the morphological and ... -
Viscous-Gravity spreading of oil on water
( John Wiley & Sons, Inc. , 2001 , Article)Spreading of oil on calm water is analyzed for the second stage of spread, which is controlled by a balance between gravity and viscous forces. The analysis, using the integral boundary-layer method, agreed well with a ... -
Modeling, simulation and control of a scheibel liquid–liquid contactor: Part 2. Model-based control synthesis and design
( Elsevier B.V. , 2004 , Article)This study describes an application of model-based control techniques to a liquid–liquid extraction process. The control design is based on a reduced order model of the process obtained by system identification. A multi-loop ... -
Modeling, simulation and control of a scheibel liquid–liquid contactor: Part 1. Dynamic analysis and system identification
( Elsevier B.V. , 2004 , Article)The liquid–liquid extraction process is well-known for its complexity and often entails intensive modeling and computational efforts to simulate its dynamic behaviour. However, rigorous mathematical models are usually ... -
A simplified method for calculating saturated liquid densities
( Elsevier B.V. , 2004 , Article)A simplification for the Nasrifar–Moshfeghian (NM) liquid density correlation has been developed. A replacement for the Mathias and Copeman temperature-dependent term with the original Soave–Redlich–Kwong equation of state ... -
Neural network model-based predictive control of liquid–liquid extraction contactors
( Elsevier Ltd , 2004 , Article)The inherent complex nonlinear dynamic characteristics and time varying transients of the liquid–liquid extraction process draw the attention to the application of nonlinear control techniques. In this work, neural ... -
Integrating hybrid systems with existing thermal desalinationplants
( Elsevier B.V. , 2004 , Article)In Gulf countries, most power plants are co-generation power desalting plants (CPDP) that generate electric energy and also produce fresh water through the desalination of seawater. This paper provides detailed technical ... -
Aquifer storage and recovery (ASR): A strategic cost-effective facility to balance water production and demand for Sharjah
( Elsevier B.V. , 2004 , Article)Aquifer storage and recovery was evaluated as a strategic water storage facility and as a tool to reduce overallcost of water production. This work investigated the size, cost, and mode of operation required to run the ... -
Treatment of waters colored with methylene blue dye by vacuum membrane distillation
( Elsevier B.V. , 2004 , Article)Textile industries consume large amounts of water and generate highly dye-contaminated effluents. Textile wastewaters have to be treated in order to be recycled in the process or to meet legislative requirements before ... -
Desalination using ambient air: simulation and energy optimization
( Elsevier B.V. , 2004 , Article)This work applies to process design, simulation, analysis, and optimization to minimize the energy requirements for producing desalinated water using ambient air (humidification and dehumidification process). The only ... -
Stability of membrane fouling particles under perikinetic and orthokinetic flow conditions
( Elsevier B.V. , 2004 , Article)Stability of fouling particles against Brownian motion (perikinetic) and simple shear flow (orthokinetic) was investigated. The effect of the various parameters such as particle radius, Hamaker constant, salt (1-1 type) ... -
Neural-Networks-Based Feedback Linearization versus Model Predictive Control of Continuous Alcoholic Fermentation Process
( WILEY-VCH Verlag GmbH & Co. , 2005 , Article)In this work advanced nonlinear neural networks based control system design algorithms are adopted to control a mechanistic model for an ethanol fermentation process. The process model equations for such systems are highly ... -
Representation of Adsorption Data for the Isopropanol-Water System using Neural Network Techniques
( WILEY-VCH Verlag , 2005 , Article)Molecular sieves and palm stone, a newly developed bio-based adsorbent, were used to break an azeotropic isopropanol-water system via an adsorptive distillation process. Equilibrium data at different inlet water contents ... -
Modeling of mass transport of aqueous solutions of multi-solute organics through reverse osmosis membranes in case of solute–membrane affinity: Part 1. Model development and simulation
( Elsevier B.V. , 2005 , Article)A two-dimensional mathematical model is developed for transport of multi-solute liquid (aqueous) solutions through reverse osmosis membranes in which strong affinity may exist between the membrane polymer and the solutes. ... -
Photodegradation of methylene blue dye by the UV/H2O2 and UV/acetone oxidation processes
( Elsevier B.V. , 2005 , Article)The photodegradation of methylene blue (MB) dye in aqueous solutions was investigated using a laboratory-scale UV lamp in the presence of hydrogen peroxide (H2O2). Different initial concentrations of dyes (10, 20, 30, 40 ...