公开(公告)号：US20090120072A1

公开(公告)日：2009-05-14

申请号：US11983909

申请日：2007-11-13

申请人： Ralph Albert Dalla Betta ,  Joel M. Cizeron ,  David R. Sheridan

发明人： Ralph Albert Dalla Betta ,  Joel M. Cizeron ,  David R. Sheridan

IPC分类号： F01N3/025 ,  F01N3/027 ,  F01N3/36

CPC分类号： F01N3/0814 ,  F01N3/0253 ,  F01N3/0842 ,  F01N3/0885 ,  F01N3/103 ,  F01N3/2033 ,  F01N3/2066 ,  F01N13/0093 ,  F01N13/0097 ,  F01N2240/30 ,  F01N2330/48 ,  F01N2340/00 ,  F01N2560/026 ,  F01N2560/06 ,  F01N2560/14 ,  F01N2610/03 ,  Y02T10/24 ,  Y02T10/26

摘要： An exhaust aftertreatment system is provided with a large channel combustor, a fuel reformer, and a lean NOX trap. The lean NOX trap is denitrated by steps comprising: heating the fuel reformer to steam reforming temperatures by introducing vaporized fuel to the large channel combustor and combusting a portion of the vaporized fuel under lean conditions, then making the exhaust-injected fuel mixture overall rich, whereby the fuel reformer produces syn gas that denitrates the lean NOX trap. The fuel reformer has a low thermal mass, whereby it is designed to heat to at least about 500° C. and catalyze steam reforming reaction with each denitration. The large channel combustor is a monolith having an average channel size larger than the fuel reformer and a thermal mass no more than about 20% that of the fuel reformer, whereby the large channel combustor facilitates low temperature startup of the fuel reformer.

摘要翻译： 排气后处理系统设置有大通道燃烧器，燃料重整器和贫NOx捕集器。 贫NOX捕集阱通过以下步骤进行脱硝，包括：通过将汽化燃料引入大通道燃烧器并在贫条件下燃烧一部分蒸发燃料，然后使排气喷射的燃料混合物整体富集，将燃料重整器加热至蒸汽重整温度， 由此燃料重整器产生脱气贫NOX捕集器的合成气。 燃料重整器具有低的热质量，由此其被设计成加热至至少约500℃，并且催化每个脱硝的蒸汽重整反应。 大通道燃烧器是具有大于燃料重整器的平均通道尺寸和不超过燃料重整器的约20％的热质量的整料，因此大通道燃烧器促进燃料重整器的低温启动。