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公开(公告)号：US5279997A
公开(公告)日：1994-01-18
申请号：US772298
申请日：1991-10-07
CPC分类号： B01J29/46 , B01D53/8625 , B01D53/9418 , B01D2251/21 , B01D2255/1023 , B01D2255/2063 , B01D2255/20761 , B01D2255/504 , B01D2255/912
摘要： A catalyst system for the selective reduction of gaseous NO.sub.x in the presence of excess oxygen, having a copper-containing ZSM5 zeolite to which a NO.sub.x -containing gas is exposed, and means for introducing a metered volume of finely dispersed, water soluble, oxygen-containing organic compound (alcohol, aldehyde, ketone, ether) into the NO.sub.x -containing gas prior to exposure to the Cu-ZSM5 zeolite.Also, a method of treating automotive exhaust gas emissions, having an excess of oxygen, by the steps of: (a) introducing a water soluble, oxygenated organic compound (steam/oxygenate mixture) into the exhaust gas emissions as a reductant and at a location closely adjacent the source of the exhaust gas generation (in an appropriate amount with respect to the NO.sub.x); (b) substantially immediately exposing the reductant/emission mixture to a transition metal-exchanged high silica ZSM5 zeolite (SiO.sub.2 /Al.sub.2 O.sub.3 of between 10-50) catalyst at a space velocity in the range of 20-80 K hr.sup.-1 ; and (c) sequentially exposing the effluent of such zeolite catalyst to an oxidation catalyst.
摘要翻译： 一种用于在存在过量氧的情况下选择性还原气态NOx的催化剂体系，其具有含有含NO x气体的含铜ZSM5沸石，以及用于引入计量体积的细分散，水溶性， 含有有机化合物（醇，醛，酮，醚）在暴露于Cu-ZSM5沸石之前进入含NO x的气体。 另外，通过以下步骤处理具有过量氧气的汽车废气排放的方法：（a）将水溶性的含氧有机化合物（蒸汽/含氧化合物）引入作为还原剂的废气排放中， 紧邻废气产生源（相对于NOx的适当量）的位置; （b）基本上立即将还原剂/排放混合物以20-80Khr -1的空间速度暴露于过渡金属交换的高二氧化硅ZSM5沸石（10-50）之间的SiO 2 / Al 2 O 3）催化剂; 和（c）将这种沸石催化剂的流出物依次暴露于氧化催化剂。
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公开(公告)号：US5149511A
公开(公告)日：1992-09-22
申请号：US772297
申请日：1991-10-07
CPC分类号： B01J29/46 , B01D53/9418 , B01D53/944 , B01D53/9459 , B01D2251/208 , B01D2251/21 , B01D2255/1021 , B01D2255/1023 , B01D2255/20761 , B01D2255/504 , B01D2258/012
摘要： A catalyst system for the selective reduction of gaseous NO.sub.x in the presence of excess oxygen, having a copper-containing ZSM5 zeolite to which a NO.sub.x -containing gas is exposed, and means for introducing a metered volume of comminuted water-soluble, oxygen-containing organic compound (alcohol, aldehyde, ketone, ether) into the NO.sub.x -containing gas prior to exposure to the Cu-ZSM5 zeolite.Also, a method of treating automotive exhaust gas emissions, having an excess of oxygen, by the steps of: (a) introducing a water-soluble, oxygenated organic compound (steam/oxygenate mixture) into the exhaust gas emissions as a reductant and at a location closely adjacent the source of the exhaust gas generation (in an appropriate amount with respect to the NO.sub.x); (b) substantially immediately exposing the reductant/emission mixture to a transition metal-exchanged high silica ZSM5 zeolite (SiO.sub.2 /Al.sub.2 O.sub.3 of between 10-50) catalyst at a space velocity in the range of 20-80 K hr.sup.-1 ; and (c) sequentially exposing the effluent of such zeolite catalyst to an oxidation catalyst.
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公开(公告)号：US5354544A
公开(公告)日：1994-10-11
申请号：US173230
申请日：1993-12-27
CPC分类号： B01D53/9459 , B01D53/9418 , B01D53/945 , B01D2251/208 , B01D2251/21 , B01D2255/504 , Y02T10/22
摘要： This invention is directed to a method of treating automotive exhaust gas emissions or stationary source emissions. It comprises introducing an organic hydrocarbon compound or compounds containing nitro or nitroso functional groups into the emissions at a location adjacent the source of emission generation. Thereafter, the compound/emission mixture is exposed to a transition metal exchanged high silica ZSM5 zeolite catalyst. Subsequently, the effluent from the zeolite catalyst is exposed to an oxidation catalyst.
摘要翻译： 本发明涉及一种处理汽车废气排放物或固定源排放物的方法。 它包括将有机烃化合物或含有硝基或亚硝基官能团的化合物引入邻近发射源的位置的排放物中。 此后，将化合物/发射混合物暴露于过渡金属交换的高二氧化硅ZSM5沸石催化剂。 随后，将来自沸石催化剂的流出物暴露于氧化催化剂。
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4.发明授权Automotive engine having catalytic exhaust aftertreatment device and secondary air injection control system for minimum catalyst light-off time 失效具有催化排气后处理装置和二次空气喷射控制系统的汽车发动机，用于最小催化剂熄火时间
公开(公告)号：US5410872A
公开(公告)日：1995-05-02
申请号：US131222
申请日：1993-10-04
摘要： An automotive engine and exhaust aftertreatment system includes an engine, a catalytic exhaust aftertreatment device for receiving exhaust gas from the engine, and an air source for supplying air to the exhaust stream entering the catalyst. An exhaust gas oxygen sensor determines the amount of oxygen contained in the exhaust entering the catalyst, and an engine control computer connected with the air source and with the oxygen sensor monitors the amount of oxygen contained in the exhaust and controls the amount of air supplied to the exhaust stream by the air source such that the available oxygen is slightly in excess of the stoichiometric requirement. In this manner, the light-off time of the catalyst is minimized.
摘要翻译： 汽车发动机和排气后处理系统包括发动机，用于接收来自发动机的废气的催化废气后处理装置，以及用于向进入催化剂的排气流供给空气的空气源。 排气氧传感器确定进入催化剂的排气中所含的氧气量，与空气源连接的发动机控制计算机和氧气传感器监测排气中所含的氧气的量，并控制供应给 排气流通过空气源使得可用氧气略微超过化学计量要求。 以这种方式，使催化剂的熄灭时间最小化。
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