SYSTEM AND METHOD FOR THE ON-BOARD PRODUCTION OF REDUCTANTS
    25.
    发明申请
    SYSTEM AND METHOD FOR THE ON-BOARD PRODUCTION OF REDUCTANTS 审中-公开
    用于板上生产减速机的系统和方法

    公开(公告)号:US20090173058A1

    公开(公告)日:2009-07-09

    申请号:US11971259

    申请日:2008-01-09

    IPC分类号: F01N3/00 F01N3/20 F01N3/18

    摘要: A system is provided for the on-board production of reductants. The system comprises a fuel tank adapted to directly or indirectly supply a first fuel stream and a second fuel stream. An engine is in fluid communication with the fuel tank, and is configured to receive the first fuel stream and create an exhaust stream. The system further includes an emission treatment unit to treat the exhaust stream. A fuel conversion unit is configured to receive the second fuel stream, and also receive a stream comprising oxygen to partially oxidize at least a portion of the second fuel stream thereby forming reductants. In addition, the fuel conversion unit is configured to supply a reductant stream comprising the reductants to the exhaust stream. The invention further provides a method for the on-board production of reductants including supplying a first fuel stream to an engine, wherein the engine is configured to create an exhaust stream. A second fuel stream and a stream comprising oxygen are supplied to a fuel conversion unit. At least a portion of the second fuel stream is partially oxidized in the fuel conversion unit to form reductants, and a reductant stream comprising the reductants is supplied to the exhaust stream. The selective catalytic reduction of NOx present in the exhaust stream is performed.

    摘要翻译: 提供了用于车载生产还原剂的系统。 该系统包括适于直接或间接地供应第一燃料流和第二燃料流的燃料箱。 发动机与燃料箱流体连通,并且构造成接收第一燃料流并产生排气流。 该系统还包括用于处理废气流的排放处理单元。 燃料转换单元被构造成接收第二燃料流,并且还接收包含氧的流以部分地氧化至少一部分第二燃料流,从而形成还原剂。 此外,燃料转化单元构造成将包含还原剂的还原剂流供应到排气流。 本发明还提供一种用于车载生产还原剂的方法,包括向发动机提供第一燃料流,其中发动机被配置成产生排气流。 第二燃料流和包含氧气的流被供应到燃料转化单元。 第二燃料流的至少一部分在燃料转化单元中被部分氧化以形成还原剂,并且将包含还原剂的还原剂流供应到废气流中。 执行排气流中存在的NOx的选择性催化还原。

    Catalyst system and method for the reduction of NOx
    26.
    发明申请
    Catalyst system and method for the reduction of NOx 失效
    用于还原NOx的催化剂体系和方法

    公开(公告)号:US20070092421A1

    公开(公告)日:2007-04-26

    申请号:US11242655

    申请日:2005-10-04

    IPC分类号: B01D53/56

    摘要: Disclosed is a catalyst system for the reduction of NOx. The catalyst system comprises a catalyst in a first zone comprising a catalyst support, a catalytic metal comprising gallium, and at least one promoting metal selected from the group consisting of silver, gold, vanadium, zinc, tin, bismuth, cobalt, molybdenum, tungsten, indium and mixtures thereof; a catalyst in the second zone following the first zone; the catalyst comprising a second catalyst support, a second catalytic metal selected from the group consisting of indium, copper, manganese, tungsten, molybdenum, titanium, vanadium, iron, cerium and mixtures thereof. The catalyst system further comprises a gas stream comprising an organic reductant comprising oxygen or nitrogen. The catalyst system may further optionally comprise a catalyst in a third zone following the second zone; the catalyst comprising a third catalyst support and a third catalytic metal selected from the group consisting of platinum, palladium, and mixtures thereof. A method for reducing NOx utilizing the catalyst system is also provided.

    摘要翻译: 公开了一种用于还原NO x的催化剂体系。 催化剂体系包括在包含催化剂载体,包含镓的催化金属和至少一种选自银,金,钒,锌,锡,铋,钴,钼,钨的促进金属的第一区中的催化剂 ,铟及其混合物; 在第一区之后的第二区中的催化剂; 所述催化剂包含第二催化剂载体,选自铟,铜,锰,钨,钼,钛,钒,铁,铈及其混合物的第二催化金属。 催化剂体系还包括含有包含氧或氮的有机还原剂的气流。 催化剂体系还可以任选地包括在第二区之后的第三区中的催化剂; 所述催化剂包含第三催化剂载体和选自铂,钯及其混合物的第三催化金属。 还提供了利用催化剂体系还原NO x的方法。

    Direct epoxidation process using carbonate modifiers
    27.
    发明授权
    Direct epoxidation process using carbonate modifiers 失效
    直接环氧化工艺使用碳酸酯改性剂

    公开(公告)号:US06399794B1

    公开(公告)日:2002-06-04

    申请号:US09998939

    申请日:2001-11-15

    申请人: Dan Hancu

    发明人: Dan Hancu

    IPC分类号: C07D30106

    CPC分类号: C07D301/04

    摘要: The invention is a process for epoxidizing an olefin with hydrogen and oxygen in the presence of a modifier and a catalyst comprising a noble metal and titanium zeolite. The modifier is (a) calcium carbonate in the presence of carbon dioxide or (b) ammonium bicarbonate. The process results in increased catalyst activity, selectivity to epoxide, and increased catalyst life.

    摘要翻译: 本发明是一种在改性剂和包含贵金属和钛沸石的催化剂存在下用氢和氧环氧化烯烃的方法。 改性剂是(a)在二氧化碳存在下的碳酸钙或(b)碳酸氢铵。 该方法导致催化剂活性增加,对环氧化物的选择性增加,催化剂寿命增加。