Articles techniques et présentations

Ici vous trouverez les présentations issues des Conférences COMSOL à travers le monde. Réalisées par des utilisateurs de COMSOL Multiphysics, ces présentations explorent tous les domaines actuels d'innovation. Les applications couvrent pratiquement tous les secteurs industriels et impliquent des phénomènes électriques, mécaniques, fluidiques et chimiques. Utilisez la recherche rapide pour trouver les présentations les plus intéressantes dans votre domaine d'intérêt.

Simulation of Gas/Liquid Membrane Contactor with COMSOL Multiphysics®

N. Ghasem[1], M. Al-Marzouqi[1], N. Abdul Rahim[1]
[1]UAE University, Al-Ain, United Arab Emirates

A comprehensive mathematical model that includes mass and heat transfer was developed for the transport of gas mixture of carbon dioxide and methane through hollow fiber membrane (HFM) contactor. COMSOL Multiphysics® was used in solving the set of partial, ordinary and algebraic equations. The model was based on "non-wetted mode" in which the gas mixture filled the membrane pores for ...

Sulfur Deactivation Effects on Catalytic Steam Reforming of Methane Produced by Biomass Gasification

P. Sadooghi[1], R. Rauch[1]
[1]Vienna University of Technology, Vienna, Austria

Sulfur, which is incorporated in the biomass structure, is released into the product gas during gasification as hydrogen sulfide. Hydrogen sulfide is known to deactivate nickel based steam reforming catalysts by chemisorption on the metal surface during steam reforming process. Desulfurization has a negative effect on the process efficiency therefore steam reforming has to be run without ...

Finite Element Study of the Mass Transfer in Annular Reactor - new

Y. M. S. El-Shazly[1], S. W. Eletriby[1]
[1]Alexandria University, Alexandria, Alexandria, Egypt.

The annular reactor is a very useful design to carry many chemical reactions. In this study, COMSOL Multiphysics® software was used to study the isothermal mass transfer from the inner side of the outer tube of the annular reactor in the range of 200

Simulation of Methane Adsorption in ANG Storage System

P.K. Sahoo[1], K.G. Ayappa[1], M. John[2], B.L. Newalkar[2], and N.V. Choudary[2]
[1]Department of Chemical Engineering, Indian Institute of Science, Bangalore, Karnataka
[2]Corporate R&D Centre, Bharat Petroleum Corporation Ltd. Greater Noida, India

Recently adsorptive storage has been identified as the most promising low-pressure (3.5 - 4.0 MPa) alternative for storing natural gas for vehicular use. However in order to successfully implement this technology, the filling and discharge characteristics of the adsorbent bed must be well understood. Significant temperature changes that occur during adsorption and desorption retard the system ...

Optimization of DPF Structures with a 3D-Unit Cell Model

W. Beckert[1], M. Dannowski[1], L. Wagner[1], J. Adler[1]
[1]Fraunhofer IKTS, Dresden, Germany

The 3D unit cell model approach offers an efficient tool to analyze the influences of geometrical design (channel shape and arrangement, filter length, wall thickness) and filter material properties (permeability, soot loading characteristics) on the performance of ceramic particle filter structure in the soot loading process, assessed by pressure loss and soot loading capacity. It does correctly ...

Turbulent Compressible Flow in a Slender Tube

K.O. Lund[1], C.M. Lord[2]
[1]Kurt Lund Consulting, Del Mar, CA, USA
[2]Lord Engineering Corp., Encinitas, CA, USA

Pressure-drop experiments were conducted for the turbulent, compressible flow of air in a small, slender tube, and modeled with COMSOL heat transfer module, and analytically. A scalar integration variable is introduced which integrates the mass velocity [kg/m²s] over the inlet area and iteratively equates this to the input mass flow [kg/s]. For computation, the temperature specification is ...

Developments in a Coupled Thermal-Hydraulic-Chemical-Geomechanical Model for Soil and Concrete

S.C. Seetharam[1], D. Jacques[1]
[1]Performance Assessments Unit, Institute for Environment, Health and Safety, Belgian Nuclear Research Centre (SCK•CEN), Mol, Belgium

This paper documents current status in the development of a coupled thermal-hydraulic-chemical-geomechanical numerical suite within COMSOL-MATLAB environment to address soil and concrete applications. The mathematical formulations are based on well-established continuum scale models unifying mass conservation, energy conservation, charge conservation, thermodynamic equilibrium and kinetics and ...

Transport-Kinetic Interactions for SO2 Oxidation to SO3 in Particulate and Monolith Catalysts - new

P. L. Mills[1], A. Nagaraj[2]
[1]Department of Chemical & Natural Gas Engineering, Texas A&M University, Kingsville, TX, USA
[2]Department of Environmental Engineering, Texas A&M University, Kingsville, TX, USA

Introduction: Development of next-generation chemical processes that have zero emissions is a key environmental objective for sustainable development. The manufacture of H2SO4 by the air oxidation of SO2 to SO3 is an important technology where an opportunity exists for new catalyst development and process innovation by reducing emissions of unconverted SO2 in process reactor tail gases owing to ...

Kinetics of Carbon Dioxide Absorption into Mixed Aqueous Solutions of MDEA and MEA using Laminar Jet Apparatus and Numerically Solved Absorption-Rate/Kinetic Model

M. Edali1, A. Aboudheir2, and R. Idem1
1Process Systems Engineering, University of Regina, Regina, SK, Canada
2HTC Purenergy, Regina, SK, Canada

The experimental kinetic data obtained with a laminar jet apparatus for the absorption of carbon dioxide (CO2) in CO2 loaded mixed solutions of mixed MDEA and MEA were interpreted with the aid of a comprehensive numerically-solved absorption rate/kinetic model. The partial differential equations in this model were solved by two numerical techniques; the finite difference method (FDM) based on an ...

Coupling of Catalytic Endothermic and Exothermic Reactions by CPR

S. Vaccaro, G. Ferrazzano, and P. Ciambelli
Università di Salerno

Mathematical modelling of a catalytic plate reactor for methane steam reforming with COMSOL Multiphysics was carried out. The model reactor includes three channels where methane combustion occurs on the plates bordering the inner side of the outermost channels, whereas methane steam reforming takes place on the plates bordering the central channel.

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