Bijan Medi

Hamedan University of Technology · Department of Chemical Engineering

Membrane separation has become a panacea for various scientific and engineering problems, including water treatment, gas separation, purification, hemodialysis, and drug delivery. Modeling and simulation of such systems are necessary for the design, analysis, and optimization of membrane separation processes. Despite numerous studies, an efficient...

Chemical and biochemical processes generally suffer from extreme nonlinearities with respect to internal states, manipulated variables, and also disturbances. These processes have always received special technical and scientific attention due to their importance as the means of large-scale production of chemicals, pharmaceuticals, and biologically...

Phase change materials (PCMs) are currently used for many heat management applications. However, the heat transfer performance of PCMs is limited by their low thermal diffusivities. This is a critical issue for high heat flux applications, such as in thermal management of lithium-ion (Li-ion) batteries. The present work aims at the study of heat tr...

Phase change materials (PCMs) are currently used for many heat management applications. However, the heat transfer performance of PCMs is limited by their low thermal diffusivities. This is a critical issue for high heat flux applications, such as in thermal management of lithium-ion (Li-ion) batteries. The present work aims at the study of heat tr...

Phase change materials (PCMs) are currently used for many heat management applications. However, the heat transfer performance of PCMs is limited by their low thermal diffusivities. This is a critical issue for high heat flux applications, such as in thermal management of lithium-ion (Li-ion) batteries. The present work aims at the study of heat tr...

Passive Thermal Management of a Lithium-Ion Battery Using Carbon Fiber Loaded Phase Change Material: Comparison and Optimization

Optical-quality transparent, conducting polyaniline (PANI) thin films are suitable candidates for efficient counter electrodes for high-performance solar cells. In the first part of this work, the synthesis of highly uniform and homogenous nanostructured PANI films is reported. The film properties were assessed via scanning electron microscopy, ato...

The NGL refinery of the Sirri Island has a major role in the production of highvalue products. One of the most important refinery units is the demethanizer unit, comprising of a complex network of distillation towers and heat exchangers. In the first step, using the Aspen Hysys software, a proper steady state model was developed for this unit in wh...

Nitrobenzene (NB) has a wide range of usage as a chemical intermediate and also as a dye in printing applications. Despite its advantages, NB is harmful to human and animals and hence is an environmental pollutant. In this research, NB removal from water was studied via adsorption on graphene oxide (GO) coated by polythiophene (PT) nanoparticles. T...

Membrane separation technology has become an important part of process flowsheet synthesis in which it can be combined with other unit operations for enhanced separation of gasses and liquids. Since process flowsheet synthesis requires computationally efficient numerical algorithms, in this work, an accurate, fast, and robust computer model for the...

Bitumen has remarkable chemical and mechanical properties as a construction and insulating material. In this research, bitumen reinforced with polythiophene, which is doped with Fe3O4 nanoparticles, was produced by the vacuum shock technique. Samples were prepared at various filler loadings to investigate their rheological and mechanical properties...

One of the problematic issues in soil pollution studies is heavy metal particles which are produced by mines and smelting units and spread through wind action and/or runoff. Pollution and health risk assessment of cadmium, lead, zinc, copper, and nickel in soil around the lead and zinc smelting factory was carried out in Zanjan City, Iran. Contamin...

This paper presents the computational fluid dynamics (CFD) simulation of a gas turbine combustor with methane-air fuel at atmospheric pressure. The velocity fields, temperature profile and species distributions have been numerically studied. The mathematical combustion models, namely Eddy Dissipation Concept (EDC) model coupled with detailed kineti...

This work presents experimental implementation of an improved single-column chromatographic (ISCC) separation process and its optimizing controller. A mixture of guaifenesin enantiomers has been used to evaluate the performance and integrity of: (i) the ISCC process and its online monitoring system in open-loop experiments, and (ii) the model predi...

This work addresses a way to combine isotherm determination and nonlinear calibration. In this method, like the classical inverse method, experimental elution profiles are compared with the results of a detailed model that accounts for nonlinearity in equilibrium, axial dispersion, and mass transfer kinetics. However, unlike the classical inverse m...

Chromatography has been established as the method of choice for the separation and purification of optically pure drugs which has a market size of about 250 billion USD. Single column chromatography (SCC) is commonly used in the development and testing phase of drug development while multi-column Simulated Moving Bed (SMB) chromatography is more su...

AIChE Annual Meeting 2012- Pittsburg Separations Division Adsorption and Ion Exchange(02E) Nonlinear direct inverse method: a way to combine nonlinear calibration with isotherm determination Monzure-Khoda Kazi , Bijan Medi, Mohammad Amanullah* School of Chemical and Biomedical Engineering Nanyang Technological University 62 Nanyang Drive, Sin...

This work addresses optimization of an improved single-column chromatographic (ISCC) process for the separation of guaifenesin enantiomers. Conventional feed injection and fraction collection systems have been replaced with customized components facilitating simultaneous separation and online monitoring with the ultimate objective of application of...

The aim of this work was to investigate an accurate, fast, and stable numerical scheme for solving chromatographic model equations, especially, but not limited to, those in the presence of a shock front. Existing solution techniques, such as finite-difference and finite-element methods, are briefly reviewed and compared with the finite-volume metho...

Methanol has been of great interest as a substrate for production as a novel feed grade protein in Iran. Up to 160 methylotrophic strains were isolated at the Jahad-e Agriculture Research Engineering Center for Scientific Research and various batch experiments were carried out at different pH, temperature, agitation, aeration rate and methanol conc...