Deep filtration and catalytic oxidation: an effective way for soot removal

被引:25
作者
Ciambelli, P [1 ]
Palma, V [1 ]
Russo, P [1 ]
Vaccaro, S [1 ]
机构
[1] Univ Salerno, Dipartimento Ingn Chim & Alimentare, I-84084 Fisciano, SA, Italy
关键词
deep filtration; catalytic oxidation; diesel engine;
D O I
10.1016/S0920-5861(02)00020-2
中图分类号
O69 [应用化学];
学科分类号
081704 ;
摘要
Catalytic and uncatalytic axial flow ceramic foam traps for soot removal were prepared and tested at the exhaust of a gas oil burner. Soot filtration efficiencies of uncatalytic and catalytic traps were comparable and depended on the burner operating conditions. A threshold temperature of the catalyst of about 330 degreesC was determined. Above such a temperature while the pressure drop through the uncatalytic trap increases continuously because of soot load, that through the catalytic trap reaches a steady-state value where the soot amounts captured and burned on the trap were equivalent. Also radial flow ceramic foam traps were prepared and tested at the exhaust of a common rail diesel engine. Their behaviours reflected those of the corresponding axial flow traps. A model descriptive of the relevant phenomena (filtration, combustion and pressure drop time evolution) occurring all over the traps was formulated. It is able to yield the overall trap performances although further improvements are needed in the catalytic case. (C) 2002 Elsevier Science B.V. All rights reserved.
引用
收藏
页码:363 / 370
页数:8
相关论文
共 25 条
[11]  
GULATI ST, 1998, STRUCTURED CATALYSTS, P510
[12]  
LOX ES, 1991, CATALYSIS AUTOMOTIVE, V2, P291
[13]  
MASSIMILLA L, 1989, TRANSPORT PROCESSES, P487
[14]  
MONTANARO L, 1998, 980540 SAE
[15]  
NEEFT JPA, 1995, THESIS TU DELFT DELF
[16]   Properties of ceramic foam catalyst supports: pressure drop [J].
Richardson, JT ;
Peng, Y ;
Remue, D .
APPLIED CATALYSIS A-GENERAL, 2000, 204 (01) :19-32
[17]   Development of catalysts based on pyrovanadates for diesel soot combustion [J].
Saracco, G ;
Badini, C ;
Russo, N ;
Specchia, V .
APPLIED CATALYSIS B-ENVIRONMENTAL, 1999, 21 (04) :233-242
[18]   A review of the effect of particulate traps on the efficiency of vehicle diesel engines [J].
Stamatelos, AM .
ENERGY CONVERSION AND MANAGEMENT, 1997, 38 (01) :83-99
[19]  
STOBBE P, 2000, Patent No. 0014639
[20]   Simultaneous catalytic removal of nitrogen oxides and diesel soot particulate over perovskite-related oxides [J].
Teraoka, Y ;
Nakano, K ;
Shangguan, W ;
Kagawa, S .
CATALYSIS TODAY, 1996, 27 (1-2) :107-113