科技论文和展示

这里您可以找到在全球 COMSOL 年会上所有用户报告的演示文稿。这些演示文稿介绍 COMSOL 用户是如何使用 COMSOL Multiphysics 进行创新性研究和产品设计。研究主题涵盖了包括电气、机械、流体和化工等范围广泛的行业和应用领域。请使用“快速搜索”来查找与您的研究领域相关的演示文稿。

Advancements in Carbon Dioxide and Water Vapor Separations Using COMSOL Multiphysics®

J. Knox[1], R. Coker[1], R. Cummings[1], C. Gomez[1], G. Schunk[1]
[1]NASA, Marshall Space Flight Center, Huntsville, AL, USA

Some NASA efforts are focused on improving current systems that utilize fixed beds of sorbent pellets by evaluating structured sorbents, seeking more robust pelletized sorbents, and examining alternate bed configurations to improve system efficiency and reliability. For the bulk separation of CO2 and H2O, temperature changes due to the heat of adsorption are significant, requiring modeling and ...

Zur Kopplung zwischen Transport und chemischen Speziationsrechnungen mit FEMLAB®

Holzbecher, E.
Humboldt Universität Berlin, IGB, Berlin, GERMANY

In vielen Berechnungen des Umweltschutzes, der chemischen Verfahrenstechnik, der Energietechnik und weiteren Bereichen von Wissenschaft und Technik, spielen Transport- und Reaktionsprozesse gleichermaßen eine Rolle. Aufgrund der Wechselwirkung zwischen Transport und Reaktion ist das Verständnis derartiger Systeme schwierig. In der Regel werden daher Modelle eingesetzt, um derartige Situationen ...

CO2 capture by means of chemical looping combustion

Pavone, D.
IFP, Lyon, Vernaison, France

In a search of concepts for innovative reactors allowing CO2 capture in gas turbine, monolith based chemical looping combustion has been identified as a promising concept. A precise simulation of the chemical looping combustion in a channel of monolith is developed to define the design rules and the material specifications. The objective is also to evaluate this innovative process in terms of ...

Simulation of Differential Ion Mobility (DMS) Principle Coupled with Mass Spectrometry in Atmospheric Pressure

F. Sinatra[1], T. Wu[2], A. Avila[2], E. Nazarov[1], T. Evans-Nguyen[1], J. Wang[2]
[1]Draper Laboratory, Tampa, FL, USA
[2]University of South Florida, Tampa, FL, USA

Mass spectrometry is an analytical technique widely used in the scientific community to determine chemical composition of sample compounds. Typically, mass spectrometers perform their analysis under vacuum conditions, though atmospheric pressure mass spectrometers are becoming more prevalent. With the development of atmospheric pressure mass spectrometers, techniques such as FAIMS (Field ...

Computations on the coupled heat and mass transfer during fires in bulk materials, coal deposits and waste dumps

Krause, U., Schmidt, M., Lohrer, C.
Federal Institute for Materials Research and Testing (BAM), Division II.2 “Reactive Substances and systems”, Berlin, Germany

In porous combustible matter low-rate oxidation takes place at ambient conditions. In large stockpiles of bulk goods, coal heaps, waste dumps etc. it may occur that the heat released by the oxidation reaction is not fully transmitted to the surroundings but raises the temperature within the deposit. This triggers a positive feed-back loop since the oxidation rate increases with temperature. The ...

Autothermal Reforming of a Hydrocarbon Fuel in a Monolithic Reactor

D. Creaser
Chalmers University of Technology, Sweden

In this paper, we perform simulations of the auto-thermal reforming of a hydrocarbon fuel in a monolithic reactor. The partial differential equations describing mass, heat and momentum transport were formulated and solved using COMSOL Multiphysics. It was found that mass transport limitations in the washcoat could also severely limit the rate of the reforming reaction. Heat transport ...

Model for Steam Reforming of Ethanol Using a Catalytic Wall Reactor

J. Torres[1], and D. Montane[2]
[1]Centre Huile Lourde Ouvert et Experimental (CHLOE), University of Pau, France
[2]Department of Chemical Engineering, Virgili University, Tarragona, Spain

Steam Reforming of Ethanol using a Catalytic Wall Reactor (CWR) was successfully studied using COMSOL Multiphysics. A mathematical model was used to describe the reactor performance in terms of the main variables and dimensionless groups. Simulations showed that at specified conditions CWR maintains a thermal performance adequate for evaluating catalysts under a uniform temperature profile. CWR ...

A theoretical and experimental analysis of membrane bioreactors behavior in unsteady-state conditions

Curcio, S.
Department of Chemical Engineering and Materials University of Calabria, Rende (CS), ITALY

The behavior of hollow fiber membrane bioreactors operating in recycle configuration is characterized from both theoretical and experimental point of view. The theoretical model is based on the unsteady-state balance equations governing momentum and mass transfer within the regions that can be identified in a hollow fiber reacting system with immobilized enzyme, coupled to the unsteady-state mass ...

Simulation of a Diesel Oxidation Catalyst Used in a NOx Storage and Reduction system for Heavy Duty Trucks

C. Odenbrand, and E. Senar Serra
Department of Chemical Engineering, Lund University, Lund, Sweden

This work concerns the performance of an oxidation catalyst used in a NOx storage and reduction system. The oxidation of NO is the main objective of this study, where the presence of CO and propene has also been taken into account. Experimental data has been determined on a monolithic oxidation catalyst mounted after a heavy duty diesel engine in a rig. The conversion of hydrocarbons is predicted ...

The influence of air humidity on the interaction between VOC and construction materials

Radulescu, C., Chicina, A.
LEPTAB

The subject of our study belongs to the large area of studies about the analyze and the prediction of indoor air quality. One of the actual weaknesses for the appreciations of air indoor quality is the lack off knowledge about the interactions between the pollutants and the materials (emission off VOC, adsorption). Knowing the behavior of construction materials we can figure out the possibility ...

Quick Search