公开(公告)号：US07272925B2

公开(公告)日：2007-09-25

申请号：US11257760

申请日：2005-10-25

申请人： Kenneth B. Gross ,  Steven J. Schmieg ,  Byong K. Cho ,  Jerome P. Ortmann ,  Daniel Dziedzic ,  Thomas J. Chapaton

发明人： Kenneth B. Gross ,  Steven J. Schmieg ,  Byong K. Cho ,  Jerome P. Ortmann ,  Daniel Dziedzic ,  Thomas J. Chapaton

IPC分类号： F01N3/00

CPC分类号： F01N3/0892 ,  F01N3/2066 ,  F01N2610/03 ,  Y02A50/2325 ,  Y02T10/24

摘要： The nitric oxide (NO) and nitrogen dioxide (NO2) content of lean-burn engine exhaust is beneficially prepared for selective catalytic reduction (SCR) of these oxides to nitrogen by two sidestream additions to the exhaust. An ozone-containing air stream is added to the exhaust to affect oxidation of NO to NO2. And a hydrocarbon(s) fuel constituent is added to a second humidified ozone-containing air stream and that mixture subjected to UV radiation. Strongly oxidizing hydroxyl radicals are formed by interaction of ozone, water, and UV radiation for reaction with the hydrocarbon. The resulting partially oxidized hydrocarbons (Pox) are added to the exhaust, providing effective reduction materials for the SCR of NO2 to nitrogen and water.

公开(公告)号：US07060231B2

公开(公告)日：2006-06-13

申请号：US10269235

申请日：2002-10-11

申请人： Byong K. Cho ,  Se H. Oh ,  Steven J. Schmieg

发明人： Byong K. Cho ,  Se H. Oh ,  Steven J. Schmieg

IPC分类号： B01J19/08 ,  C01B21/00

CPC分类号： F01N3/0892 ,  B01D53/323 ,  B01D53/9431 ,  F01N2240/28 ,  F01N2240/30 ,  F23J15/02 ,  F23J2215/10 ,  H05H1/2406 ,  H05H2001/2418 ,  H05H2001/2437 ,  H05H2245/1215

摘要： A plasma reactor for automotive exhaust gas applications which efficiently promotes diffusion, mass transfer and chemical reaction processes of atoms, ions and radicals, in that the ground (outer) electrode has an axially discrete pattern which provides alternating regions of active and passive electric field along the axial direction of the plasma reactor. As the exhaust gas passes axially along the plasma reactor, each active region produces plasma atoms, ions and radicals, which then have time to react with the NOx over the course of the adjacent passive region. In this manner, successive active regions produce copious atoms, radicals and ions, and the adjacent passive regions provide time for these radicals and ions to react with the NOx and hydrocarbons before the next active region is encountered by the moving stream of exhaust gas, thereby enhancing the performance of the plasma reactor.

摘要翻译： 用于汽车废气应用的等离子体反应器，其有效促进原子，离子和自由基的扩散，传质和化学反应过程，因为接地（外）电极具有轴向离散的图案，其提供有源和无源电场的交替区域 等离子体反应器的轴向。 当废气沿着等离子体反应器轴向通过时，每个有源区产生等离子体原子，离子和自由基，然后它们在相邻被动区域的过程中有时间与NO x反应。 以这种方式，连续的活性区域产生大量的原子，自由基和离子，并且相邻的被动区域在下一活性区域被遇到之前为这些基团和离子与NO x和烃反应提供时间 移动的废气流，从而提高等离子体反应器的性能。

公开(公告)号：US20090068093A1

公开(公告)日：2009-03-12

申请号：US11853262

申请日：2007-09-11

申请人： Byong K. Cho ,  Joon Hyun Baik

发明人： Byong K. Cho ,  Joon Hyun Baik

IPC分类号： B01D53/00 ,  C01B39/00

CPC分类号： B01D53/945 ,  B01D2255/104 ,  B01D2255/2042 ,  B01D2255/20746 ,  B01D2255/20761 ,  B01D2255/2092 ,  B01D2258/012 ,  B01J23/50 ,  B01J29/088 ,  B01J29/146 ,  B01J35/0006 ,  B01J2229/186 ,  Y02T10/22

摘要： A catalyst made by the introduction of copper ions and cobalt ions into a Y-type zeolite to produce a CuCoY zeolite improves the reduction of NOx in exhaust from a lean bum engine, such as a diesel engine. A dual bed selective reduction reactor in the exhaust stream comprising a first bed of BaY or of Ag/alumina and a second bed of CuCoY is particularly effective in reduction of NOx. In one embodiment, the exhaust stream is suitably treated with an oxidant, such as ozone, and a reductant, such as a diesel hydrocarbon or oxygenated diesel hydrocarbon, before the exhaust passes in contact with the dual bed catalyst.

摘要翻译： 通过将铜离子和钴离子引入Y型沸石以制备CuCoY沸石而制备的催化剂改善了来自诸如柴油发动机的贫燃发动机的排气中的NOx的还原。 包含BaY或Ag /氧化铝的第一床和CuCoY的第二床的排气流中的双床选择还原反应器在还原NOx中特别有效。 在一个实施方案中，在排气通过与双床催化剂接触之前，排气流适当地用氧化剂如臭氧和还原剂如柴油烃或含氧柴油烃进行处理。

公开(公告)号：US20110200522A1

公开(公告)日：2011-08-18

申请号：US13094418

申请日：2011-04-26

申请人： Byong K. Cho ,  Joon Hyun Baik

发明人： Byong K. Cho ,  Joon Hyun Baik

IPC分类号： C01B39/24

CPC分类号： B01D53/945 ,  B01D2255/104 ,  B01D2255/2042 ,  B01D2255/20746 ,  B01D2255/20761 ,  B01D2255/2092 ,  B01D2258/012 ,  B01J23/50 ,  B01J29/088 ,  B01J29/146 ,  B01J35/0006 ,  B01J2229/186 ,  Y02T10/22

摘要： A catalyst made by the introduction of copper ions and cobalt ions into a Y-type zeolite to produce a CuCoY zeolite improves the reduction of NOx in exhaust from a lean burn engine, such as a diesel engine. A dual bed selective reduction reactor in the exhaust stream comprising a first bed of BaY or of Ag/alumina and a second bed of CuCoY is particularly effective in reduction of NOx. In one embodiment, the exhaust stream is suitably treated with an oxidant, such as ozone, and a reductant, such as a diesel hydrocarbon or oxygenated diesel hydrocarbon, before the exhaust passes in contact with the dual bed catalyst.

摘要翻译： 通过将铜离子和钴离子引入Y型沸石以制备CuCoY沸石而制备的催化剂改善了诸如柴油发动机的贫燃发动机的排气中的NOx的还原。 包含BaY或Ag /氧化铝的第一床和CuCoY的第二床的排气流中的双床选择还原反应器在还原NOx中特别有效。 在一个实施方案中，在排气通过与双床催化剂接触之前，排气流适当地用氧化剂如臭氧和还原剂如柴油烃或含氧柴油烃进行处理。

公开(公告)号：US5609022A

公开(公告)日：1997-03-11

申请号：US331410

申请日：1994-10-31

申请人： Byong K. Cho

发明人： Byong K. Cho

IPC分类号： B01D53/94 ,  F01N3/08 ,  F01N3/20 ,  F02B1/04

CPC分类号： F01N3/0871 ,  B01D53/9409 ,  B01D53/9445 ,  B01D53/945 ,  F01N3/0814 ,  F01N3/0835 ,  F01N3/2066 ,  F01N2370/04 ,  F01N2610/03 ,  F02B1/04 ,  Y02T10/22 ,  Y02T10/24

摘要： The invention includes an operating strategy for zeolite-based catalysts used for reduction of NO.sub.x from highly lean exhaust conditions. The invention includes a method to enhance the high temperature activity of zeolite-based catalysts by modifying the transient feed composition without changing the overall time-average feed composition. More specifically, a cyclic operation method with alternating feed conditions between rich and lean to enhance the activity of zeolite-based catalysts to remove NO from lean exhaust gases when the overall exhaust composition contains a large amount of excess oxygen, without affecting the catalyst's activity to remove hydrocarbons. The rich to lean transient conditions are created by periodically adding hydrocarbon pulses from a different source to the combustion emissions.

摘要翻译： 本发明包括用于从高稀薄排气条件还原NOx的沸石基催化剂的操作策略。 本发明包括通过改变瞬时进料组成而不改变总的时间平均进料组成来提高沸石基催化剂的高温活性的方法。 更具体地说，一种循环操作方法，当富排气组合物含有大量过量的氧气，而不会影响催化剂的活性时，在富含和贫的交替进料条件下提高沸石基催化剂从贫废气中除去NO的活性 去除碳氢化合物。 丰富的稀薄瞬态条件是通过将来自不同来源的碳氢化合物脉冲周期性地添加到燃烧排放而产生的。

公开(公告)号：US07891171B2

公开(公告)日：2011-02-22

申请号：US11566693

申请日：2006-12-05

申请人： Byong K. Cho ,  Joon-Hyun Baik

发明人： Byong K. Cho ,  Joon-Hyun Baik

IPC分类号： F01N3/00

CPC分类号： B01D53/9418 ,  B01D53/9477 ,  B01D2251/104 ,  B01D2251/208 ,  B01D2251/21 ,  B01D2255/104 ,  B01D2255/2042 ,  B01D2255/2061 ,  B01D2255/50 ,  B01D2258/012 ,  B01J23/50 ,  B01J23/70 ,  B01J29/06 ,  B01J29/084 ,  B01J35/0006 ,  B01J37/04 ,  Y02A50/2325

摘要： A method for reducing nitrogen oxides including NO and NO2 in an exhaust stream also comprising oxygen, carbon monoxide and hydrocarbons at a temperature above about 150° C., the method including in embodiments oxidizing NO in the exhaust stream to NO2; reforming raw diesel fuel to produce OHC's from the fuel; adding diesel fuel hydrocarbons and their oxygenates to the exhaust stream for the reduction of nitrogen oxides; and contacting the exhaust stream with a reduction hybrid catalyst comprising BaY—Ag/Al2O3 to reduce the nitrogen oxides to N2. The method reduces NOx initially through the (HC+OHC)/SCR process producing N2, while also producing NH3 as a byproduct over Ag/Al2O3. The NH3 subsequently reduces NOx over the BaY—Ag/Al2O3 hybrid catalyst through the NH3/SCR process, producing more N2 and thereby enhancing the NOx reduction efficiency of the hybrid catalyst system.

摘要翻译： 一种在高于约150℃的温度还含有氧气，一氧化碳和烃类的废气流中还原NO和NO 2的氮氧化物的方法，该方法包括将排气流中的NO氧化为NO 2; 改造生柴油燃料生产OHC; 向排气流中加入柴油燃料烃及其含氧化合物以还原氮氧化物; 并将废气流与包含BaY-Ag / Al 2 O 3的还原性杂化催化剂接触以将氮氧化物还原成N 2。 该方法首先通过产生N 2的（HC + OHC）/ SCR工艺来还原NOx，同时还产生作为Ag / Al 2 O 3上的副产物的NH 3。 NH3随后通过NH 3 / SCR工艺在BaY-Ag / Al 2 O 3混合催化剂上减少NOx，产生更多的N 2，从而提高混合催化剂体系的NOx还原效率。

公开(公告)号：US07368094B2

公开(公告)日：2008-05-06

申请号：US10948403

申请日：2004-09-23

申请人： Byong K. Cho ,  Jong-Hwan Lee

发明人： Byong K. Cho ,  Jong-Hwan Lee

IPC分类号： B01D53/56 ,  B01D53/94

CPC分类号： B01D53/90 ,  B01D53/32 ,  B01D53/8621 ,  B01D2251/104

摘要： Ozone, preferably produced in an ambient air stream passed through a non-thermal hyperplasma reactor, is added to the hot exhaust gas stream from a lean-burn (oxygen-rich) combustion source. The ozone converts much of the NO in the NOx containing exhaust stream to NO2. The resulting NO2/NOx ratio can be controlled by the input energy density to the plasma reactor. Ammonia and/or urea is added to the ozone treated exhaust in proportion to the NOx content, and the stream passed into contact with a reduction catalyst, such as a base metal-exchanged zeolite, to convert the NOx to nitrogen.

摘要翻译： 优选在通过非热等离子体反应器的环境空气流中产生的臭氧被添加到来自稀燃（富氧）燃烧源的热废气流中。 臭氧将含有NO 的排气流中的大部分NO转化为NO 2。 可以通过等离子体反应器的输入能量密度来控制所得到的NO 2 2 / NO x比率。 将氨和/或尿素与NO x含量成比例地添加到经臭氧处理的废气中，并且流与还原催化剂如贱金属交换的沸石接触以将 NO x向氮。

公开(公告)号：US4521532A

公开(公告)日：1985-06-04

申请号：US602747

申请日：1984-04-23

申请人： Byong K. Cho

发明人： Byong K. Cho

IPC分类号： B01D53/94 ,  B01J35/04 ,  F01N3/28

CPC分类号： B01D53/9454 ,  B01J35/04 ,  F01N3/2828 ,  F01N2330/06 ,  Y02T10/22 ,  Y10T428/24149 ,  Y10T428/24744

摘要： An automobile catalytic converter of extruded ceramic monolithic honeycomb structure for treatment of automotive exhaust gas. The monolithic structure contains longitudinally extended channels formed of thin walls in a periodic pattern of cross sections of different areas to induce different flow velocities of the exhaust gas in the immediate adjacent channels. Temperature gradients thereby produced between the adjacent channels promote heat transfer in the transverse direction of the honeycomb structure to prevent the formation of maximum temperature in each channel at the same longitudinal location of the channel wall.

摘要翻译： 一种用于汽车废气处理的挤出陶瓷整体蜂窝结构的汽车催化转化器。 整体结构包含由不同区域的横截面的周期性图案的薄壁形成的纵向延伸通道，以在紧邻的通道中引起废气的不同流速。 由此在相邻通道之间产生的温度梯度促进蜂窝结构的横向方向的热传递，以防止在通道壁的相同纵向位置处在每个通道中形成最大温度。

公开(公告)号：US07939039B2

公开(公告)日：2011-05-10

申请号：US11853262

申请日：2007-09-11

申请人： Byong K. Cho ,  Joon Hyun Baik

发明人： Byong K. Cho ,  Joon Hyun Baik

IPC分类号： B01D53/56

CPC分类号： B01D53/945 ,  B01D2255/104 ,  B01D2255/2042 ,  B01D2255/20746 ,  B01D2255/20761 ,  B01D2255/2092 ,  B01D2258/012 ,  B01J23/50 ,  B01J29/088 ,  B01J29/146 ,  B01J35/0006 ,  B01J2229/186 ,  Y02T10/22

摘要： A catalyst made by the introduction of copper ions and cobalt ions into a Y-type zeolite to produce a CuCoY zeolite improves the reduction of NOx in exhaust from a lean burn engine, such as a diesel engine. A dual bed selective reduction reactor in the exhaust stream comprising a first bed of BaY or of Ag/alumina and a second bed of CuCoY is particularly effective in reduction of NOx. In one embodiment, the exhaust stream is suitably treated with an oxidant, such as ozone, and a reductant, such as a diesel hydrocarbon or oxygenated diesel hydrocarbon, before the exhaust passes in contact with the dual bed catalyst.

摘要翻译： 通过将铜离子和钴离子引入Y型沸石以制备CuCoY沸石而制备的催化剂改善了诸如柴油发动机的贫燃发动机的排气中的NOx的还原。 包含BaY或Ag /氧化铝的第一床和CuCoY的第二床的排气流中的双床选择还原反应器在还原NOx中特别有效。 在一个实施方案中，在排气通过与双床催化剂接触之前，排气流适当地用氧化剂如臭氧和还原剂如柴油烃或含氧柴油烃进行处理。

公开(公告)号：US07484358B2

公开(公告)日：2009-02-03

申请号：US11155179

申请日：2005-06-17

申请人： Byong K. Cho ,  Keith L. Olson

发明人： Byong K. Cho ,  Keith L. Olson

IPC分类号： F01N3/00

CPC分类号： F01N3/2066 ,  C10L1/02 ,  C10L1/08 ,  F01N3/30 ,  F01N13/0097 ,  F01N2240/28 ,  F01N2240/30 ,  F01N2240/38 ,  F01N2370/04 ,  F01N2610/03 ,  F01N2610/08 ,  F01N2610/10 ,  Y02A50/2325 ,  Y02T10/24

摘要： Raw diesel fuel is reformed to produce partially oxygenated hydrocarbons in the liquid fuel by use of a nonthermal plasma reactor. The reformed diesel fuel is formed by passing a stream of air plasma bubbles through a liquid volume of diesel fuel to strip low molecular weight hydrocarbons from the fuel, while partially oxygenating an abundance of them as a reformate for addition to the exhaust. This reformed diesel fuel is introduced as a sidestream into the exhaust of a diesel engine or other lean-burn power plants as reactants for selective catalytic reduction of nitrogen oxides in the exhaust. Fresh fuel is added to the liquid volume as diesel reformate is stripped from it, and a portion of the stripped fuel is withdrawn from the liquid volume.

摘要翻译： 原始柴油燃料通过使用非热等离子体反应器进行重整以在液体燃料中产生部分含氧烃。 改质的柴油燃料是通过使空气等离子体气泡流通过液体体积的柴油燃料形成的，以从燃料中剥离低分子量烃，同时部分地将大量的氧化作为重整产物加入排气中。 这种重整的柴油燃料作为侧流引入柴油发动机或其它贫燃发电厂的废气中，作为用于选择性催化还原排气中的氮氧化物的反应物。 当从其中汽提柴油重整油时，将新鲜燃料添加到液体体积中，并且一部分汽提的燃料从液体体积中排出。