Computational Simulation of the Ceramic Trap Transient Operation

2002

Ind. Eng. Chem. Res.

The reduction of particulate emissions from diesel engines is of major interest, considering the strict emission standards posed by the legislation worldwide. Although the technology of particulate filters has been under development for more than 20 years, considerable technological challenges remain regarding effectiveness and durability. The emergence of the continuous regenerating trap (CRT) in conjunction with the availability of low-sulfur diesel fuel represents a promising solution, especially for heavy-duty engines. In the present paper, a modeling approach for the combined catalyst and diesel particulate filter system is presented. The model is used to understand the main behavior trends of the oxidation catalyst and the NO 2 regenerated trap individually and as a system. Illustrative model applications are also presented for the case of a modern heavy-duty engine and operating conditions corresponding to the European testing procedures. Although the model is based on global reaction schemes, it is useful in explaining the parameters affecting the CRT system behavior in the real world. Such engineering models are expected to support the selection and design of CRT systems, minimizing the testing effort.

Section: Particulate Filter Modelmentioning

confidence: 99%

NO₂-Assisted Regeneration of Diesel Particulate Filters: A Modeling Study

and

2002

Ind. Eng. Chem. Res.

“…However, only relatively limited application of this model to real-world applications has been presented so far (McCabe and Sinkevitch, 1986). Other researchers also presented regeneration models 1 later on (Gamer and Dent, 1988;Pattas and Samaras, 1989;I Pauli et al, 1984). Recently, a quasi-1-D model based on the one due to Bisset was extended to 2-D (axisymmetric) and coupled with an FEM stress analysis program to analyze thermal stresses in the filter (Aoki et al, 1993).…”

Section: Modeling Thermal Trap Regenerationmentioning

confidence: 99%

Modeling thermal regeneration of wall‐flow diesel particulate traps

Stamatelos

1996

AIChE Journal

“…The discussion involving the energy flux through the wall starts when Pattas and Samaras (1989) formulate a discretized version of the energy equation and find this term not included in the original Bissett model. This relates back to the discrepancy in the literature regarding the channel energy equations (see previous discussion and Koltsakis and Stamatelos 1997a,b , Konstandopoulos et al 2001, 2005, Kostoglou et al 2003.…”

Section: Axial Filter Energy Equationmentioning

confidence: 99%

Catalyzed diesel particulate filter modeling

Reviews in Chemical Engineering

Haralampous

Depcik

et al. 2013

An increasing environmental concern for diesel particulate emissions has led to the development of efficient and robust diesel particulate filters (DPF). Although the main function of a DPF is to filter solid particles, the beneficial effects of applying catalytic coatings in the filter walls have been recognized. The catalyzed DPF technology is a unique type of chemical reactor in which a multitude of physicochemical processes simultaneously take place, thus complicating the tasks of design and optimization. To this end, modeling has contributed considerably in reducing the development effort by offering a better understanding of the underlying phenomena and reducing the excessive experimental efforts associated with experimental testing. A comprehensive review of the evolution and the most recent developments in DPF modeling, covering phenomena such as transport, fluid mechanics, filtration, catalysis, and thermal stresses, is presented in this article. A thorough presentation on the mathematical model formulation is given based on literature references and the differences between modeling approaches are discussed. Selected examples of model application and validation versus the experimental data are presented.