Innovative means for the catalytic regeneration of particulate traps for diesel exhaust cleaning |
| |
| Affiliation: | 1. Key Laboratory for Special Area Highway Engineering of Ministry of Education, Chang''an University, Xi''an 710064, PR China;2. Department of Engineering Mechanics, Northwestern Polytechnical University, Xi''an 710072, PR China;1. RIKEN CLST-JEOL Collaboration Center, RIKEN, Yokohama, Kanagawa 230-0045, Japan;2. JEOL RESONANCE Inc., Musashino, Akishima, Tokyo 196-8558, Japan;1. Institute of Process Machinery and Systems Engineering, Friedrich-Alexander-University Erlangen-Nürnberg (FAU), Cauerstr. 4, 91052 Erlangen, Germany;2. Materials Department 6, Friedrich-Alexander-University Erlangen-Nürnberg (FAU), Martensstr. 7, 91058 Erlangen, Germany;1. Immunology Research Center, Tabriz University of Medical Sciences, Tabriz, Iran;2. Radiology Department, Paramedical School, Tabriz University of Medical Sciences, Tabriz, Iran;3. Research Center for Pharmaceutical Nanotechnology, Tabriz University of Medical Sciences, Tabriz, Iran;4. Inorganic Chemistry Department, Chemistry Faculty, University of Tabriz, C.P. 51664 Tabriz, Iran;5. Medical Physics Department, Medical School, Tabriz University of Medical Sciences, Tabriz, Iran |
| |
| Abstract: | Catalytic traps for diesel particulate removal are multifunctional reactors coupling filtration and catalytic combustion of soot. This paper reviews the most recent developments carried out at Politecnico di Torino concerning two different trap types: zirconia-toughened-alumina foams catalysed with Cs–V catalysts, operating according to a deep filtration mechanism, and cordierite or SiC wall-flow filters catalysed with perovskite catalysts (e.g. LaCr0.9O3), enabling shallow-bed filtration. The preparation and characterisation of these two trap types are described and the performance of the traps (filtration efficiency, pressure drops, etc.) evaluated on a diesel engine bench under various operating conditions. A final critical assessment points out that most chances of practical application in mobile sources lie in wall-flow type traps for their superior filtration efficiency (>95%) and their compatibility with active trap regeneration means (e.g. fuel post-injection) that can occasionally rise on purpose the exhaust gas temperature to accelerate the catalytic combustion of trapped soot. Conversely, completely passive solutions based on deep filtration catalytic traps show only promise for stationary applications at temperatures higher than 350°C, due to insufficient catalyst activity at lower temperatures. |
| |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
