A fully distributed model for the simulation of a catalytic combustor

Wanker, Roland; Raupenstrauch, Harald; Staudinger, Gernot

doi:10.1016/s0009-2509(00)00060-9

Cited by 50 publications

(21 citation statements)

References 18 publications

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“…An axisymetric model to investigate the effect of washcoat thickness on the reforming performance of a monolithic converter was proposed by Stutz and Poulikakos (2007). Single channel simulations carried out by Hayes et al (2004), Holmgren and Andersson (1998), and Wanker et al (2000) took the masstransfer effects in the washcoat into account. Altogether, a variety of monolithic structured catalysts for different applications have been studied over the years, which applied varying models for the flow field and catalytic chemistry.…”

Section: Introductionmentioning

confidence: 99%

Modeling of transport and chemistry in channel flows of automotive catalytic converters

Mladenov¹,

Koop²,

Tischer³

et al. 2010

Chemical Engineering Science

112

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Section: Introductionmentioning

confidence: 99%

Modeling of transport and chemistry in channel flows of automotive catalytic converters

Mladenov¹,

Koop²,

Tischer³

et al. 2010

Chemical Engineering Science

112

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“…Since the active surface of monolithic catalyst is located in a washcoat, Thiele modulus can explain the diffusion effects through the pores [Wanker and H. Raupenstrauch, et al (2000)]. Washcoated monolith Thiele modulus for catalytic oxidation can be expressed as shown in Equation 5…”

Section: External Mass Transfer Limitations Of Monolithic Washcoated mentioning

confidence: 99%

Hydrogen Production for Fuel Cells via Reforming Coal-Derived Methanol

Erickson¹

2006

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Hydrogen can be produced from many feedstocks including coal. The objectives of this project are to establish and prove a hydrogen production pathway from coal-derived methanol for fuel cell applications.This progress report is the ninth report submitted to the DOE reporting on the status and progress made during the course of the project. This report covers the time period of October 1, 2005 -December 31, 2005 This quarter saw progress in four areas. These areas are:1. reformate purification, 2. heat transfer enhancement, 3. autothermal reforming coal-derived methanol degradation test 4. and model development for fuel cell system integration.The project is on schedule and is now shifting towards the design of an integrated PEM fuel cell system capable of using the coal-derived product. This system includes a membrane clean up unit and a commercially available PEM fuel cell. 3 TABLE OF CONTENTSDISCLAIMER EXECUTIVE SUMMARYHydrogen can be produced from many feedstocks including coal. The objectives of this project are to establish and prove a hydrogen production pathway from coal-derived methanol for fuel cell applications.This progress report is the ninth report submitted to the DOE reporting on the status and progress made during the course of the project. This report covers the time period of October 1, 2005 -December 31, 2005.Much progress has been made on the project funded by the Department of Energy during this reporting period. All of the projects are proceeding on schedule. This quarter saw progress in four main areas. These areas are:1. reformate purification, 2. heat transfer enhancement, 3. autothermal reforming coal-derived methanol degradation test 4. and model development for fuel cell system integration.Progress has been made on the reformate purification system. The purified hydrogen stream will be used to fuel a PEM fuel cell. The Hydrogen Production and Utilization Lab will be using a Ballard Nexa® stack from the Hybrid Vehicle Propulsion Systems Laboratory at UC Davis. The fuel cell will demonstrate a hydrogen production pathway from coal-derived methanol for fuel cell applications.While the main thrust of the work is progressing toward the demonstration of the fuel cell operating from coal derived methanol as outlined in the original proposal, further work on previous topics has expanded as well. Previous quarter's results show that using different dimension disk-ring bluff body resulted in different steam reforming enhancement. Also a swirl tape passive flow disturber was tested and showed no significant difference compared to the base line, or the results without any flow disturbers. In a recent experiment, different bluff body geometries were tested to determine the effect in bluff body enhancement. Also, smaller dimension catalyst powder was also tested and compared with the crushed catalyst in another experiment set.Further research is planned to analyze the bluff body geometry and catalyst dimension's flow influence in the packed bed such as the pressure drop and determine if th...

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“…In the past few years monolithic catalytic reactors have been used in environmental applications and currently there is a growing interest in their use for catalytic combustion reactions (Wanker et al, 2000). Monolith converters have successfully replaced the early converters using pelletised catalyst owing to properties like higher surface area for reduction of pollutants, being more compact in size, lighter in weight and having uni-body structure (Heck et al, 2001).…”

Section: Introductionmentioning

confidence: 99%

Comparison of Unsteady State and Quasi Steady State Modeling for Hydrocarbons in a Monolithic Catalytic Converter

Chauhan¹,

Srivastava²

2008

International Journal of Chemical Reactor Engineering

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In this study numerical solutions are obtained using quasi steady state and unsteady state conditions to predict the reduction in concentrations of polluting hydrocarbons. Before their release to the atmosphere these gases undergo catalytic after-treatment in a converter, causing a decrease in their concentrations. Both homogenous as well as heterogeneous reactions are considered for hydrocarbons propylene and propane. Quasi steady and unsteady state models are developed to simulate heat and mass transfer between the exhaust gas and the catalyst surface, convective heat and mass transport, chemical reactions and the related heat release along with heat conduction in the substrate.

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A fully distributed model for the simulation of a catalytic combustor

Cited by 50 publications

References 18 publications

Modeling of transport and chemistry in channel flows of automotive catalytic converters

Modeling of transport and chemistry in channel flows of automotive catalytic converters

Hydrogen Production for Fuel Cells via Reforming Coal-Derived Methanol

Comparison of Unsteady State and Quasi Steady State Modeling for Hydrocarbons in a Monolithic Catalytic Converter

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