公开(公告)号：WO2007136753A3

公开(公告)日：2008-07-10

申请号：PCT/US2007011911

申请日：2007-05-18

Applicant: CLEAN DIESEL TECH INC ,  MAKKEE MICHIEL ,  KRISHNA KAMASAMUDRAM ,  COPAN WALTER G

Inventor： MAKKEE MICHIEL ,  KRISHNA KAMASAMUDRAM ,  COPAN WALTER G

IPC: F01N3/00

CPC classification number: B01D53/944 ,  B01D53/90 ,  B01D2255/1021 ,  B01D2255/206 ,  C10L1/14 ,  C10L1/1814 ,  C10L1/1881 ,  C10L1/1886 ,  C10L1/189 ,  C10L1/305 ,  C10L10/02 ,  F01N3/0231 ,  F01N3/0253 ,  F01N3/029 ,  F01N3/035 ,  F01N3/206 ,  F01N3/2066 ,  F01N13/0097 ,  F01N2430/04 ,  F01N2610/01 ,  F01N2610/02 ,  F01N2610/03 ,  Y02T10/24

Abstract: A method and apparatus are provided for reducing emissions of particulates from diesel engines. Exhaust is passed through a diesel particular filter having at least two stages comprised of (a) a catalyst section having a platinum group metal catalyst on contact surfaces within the catalyst section and (b) a filter section comprised of passages effective to remove particulates from a moving stream of combustion gases generated by combusting the fuel in the engine and holding them therein to permit their oxidation. Carbon removal is enhanced by utilizing levels of platinum group metal composition, cerium compositions, fuels and/or optional chemical enhancers to generate NO 2 in the catalyst section in amounts sufficient to form cerium nitrates in the filter section. The cerium oxide is associated with and maintains dispersion of the platinum in the filter section, and the cerium nitrates are available at the surface and within the soot particles to provide enhanced soot oxidation at a lower balance point.

Abstract translation: 提供了一种用于减少来自柴油发动机的颗粒物排放的方法和装置。 排气通过具有至少两个阶段的柴油特定过滤器，所述两个阶段包括（a）在催化剂部分内的接触表面上具有铂族金属催化剂的催化剂部分，和（b）过滤部分，其包括有效地从 通过燃烧发动机中的燃料并将其保持在其中以允许其氧化而产生的燃烧气体流。 通过利用铂族金属组合物，铈组合物，燃料和/或任选的化学增强剂的含量，在催化剂部分中以足以在过滤器部分中形成硝酸铈的量的量产生NO 2 2来提高碳去除。 氧化铈与铂在过滤器部分中的分散相关并且保持其分散，硝酸铈可在表面和烟灰颗粒内获得，以在较低的平衡点提供增强的烟灰氧化。

公开(公告)号：WO2007136753A2

公开(公告)日：2007-11-29

申请号：PCT/US2007/011911

申请日：2007-05-18

Applicant: CLEAN DIESEL TECHNOLOGIES, INC. ,  MAKKEE, Michiel ,  KRISHNA, Kamasamudram ,  COPAN, Walter, G.

Inventor： MAKKEE, Michiel ,  KRISHNA, Kamasamudram ,  COPAN, Walter, G.

IPC: B01D53/94 ,  F01N3/021 ,  F01N3/10

CPC classification number: B01D53/944 ,  B01D53/90 ,  B01D2255/1021 ,  B01D2255/206 ,  C10L1/14 ,  C10L1/1814 ,  C10L1/1881 ,  C10L1/1886 ,  C10L1/189 ,  C10L1/305 ,  C10L10/02 ,  F01N3/0231 ,  F01N3/0253 ,  F01N3/029 ,  F01N3/035 ,  F01N3/206 ,  F01N3/2066 ,  F01N13/0097 ,  F01N2430/04 ,  F01N2610/01 ,  F01N2610/02 ,  F01N2610/03 ,  Y02T10/24

Abstract: A method and apparatus are provided for reducing emissions of particulates from diesel engines. Exhaust is passed through a diesel particular filter having at least two stages comprised of (a) a catalyst section having a platinum group metal catalyst on contact surfaces within the catalyst section and (b) a filter section comprised of passages effective to remove particulates from a moving stream of combustion gases generated by combusting the fuel in the engine and holding them therein to permit their oxidation. Carbon removal is enhanced by utilizing levels of platinum group metal composition, cerium compositions, fuels and/or optional chemical enhancers to generate NO 2 in the catalyst section in amounts sufficient to form cerium nitrates in the filter section. The cerium oxide is associated with and maintains dispersion of the platinum in the filter section, and the cerium nitrates are available at the surface and within the soot particles to provide enhanced soot oxidation at a lower balance point.

Abstract translation: 提供了一种用于减少来自柴油发动机的颗粒物排放的方法和装置。 排气通过具有至少两个阶段的柴油特定过滤器，所述两个阶段包括（a）在催化剂部分内的接触表面上具有铂族金属催化剂的催化剂部分，和（b）过滤部分，其包括有效地从 通过燃烧发动机中的燃料并将其保持在其中以允许其氧化而产生的燃烧气体流。 通过利用铂族金属组合物，铈组合物，燃料和/或任选的化学增强剂的含量，在催化剂部分中以足以在过滤器部分中形成硝酸铈的量的量产生NO 2 2来提高碳去除。 氧化铈与铂在过滤器部分中的分散相关并且保持其分散，硝酸铈可在表面和烟灰颗粒内获得，以在较低的平衡点提供增强的烟灰氧化。