公开(公告)号：US06210649B1

公开(公告)日：2001-04-03

申请号：US09060633

申请日：1998-04-15

申请人： Jackie Y. Ying ,  Mark D. Fokema

发明人： Jackie Y. Ying ,  Mark D. Fokema

IPC分类号： C01B2102

CPC分类号： B01J23/10 ,  B01D53/8628

摘要： The invention relates to compositions of matter that can be used in NOx reduction. The compositions include non-zeolitic materials such as Group IIIB metal oxides which have high surface areas to promote high catalytic activity. In particular, the compositions have high surface areas comprise agglomerates of nanocrystalline metal oxide particles. The invention also provides methods for making these compositions and for using these compositions to reduce NOx compounds without a need for toxic reducing agents such as ammonia.

摘要翻译： 本发明涉及可用于NOx还原的物质组合物。 组合物包括非沸石材料，例如具有高表面积以促进高催化活性的IIIB族金属氧化物。 特别地，组合物具有高表面积，包括纳米晶体金属氧化物颗粒的附聚物。 本发明还提供了制备这些组合物和使用这些组合物以减少NOx化合物而不需要诸如氨的毒性还原剂的方法。

公开(公告)号：US06616904B1

公开(公告)日：2003-09-09

申请号：US09708523

申请日：2000-11-09

申请人： Thierry Becue ,  Karine Malefant

发明人： Thierry Becue ,  Karine Malefant

IPC分类号： C01B2102

CPC分类号： B01D53/02 ,  B01D53/9422 ,  B01D2253/112 ,  B01D2255/1021 ,  B01D2255/2042 ,  B01D2255/2063 ,  B01D2255/2065 ,  B01D2255/2073 ,  B01D2255/20753 ,  B01D2257/404 ,  B01D2258/012 ,  B01D2259/40098 ,  B01J20/06 ,  B01J20/3234 ,  B01J23/002 ,  B01J23/40 ,  B01J23/8892 ,  B01J23/8986 ,  B01J2523/00 ,  B01J2523/72 ,  B01J2523/847 ,  B01J2523/828

摘要： The invention relates to materials for removing the nitrogen oxides NO and NO2 present in exhaust gases, particularly from internal combustion engines of automotive vehicles running in a medium containing a superstoichiometric proportion of oxidizing agents, said materials being capable of absorbing the nitrogen oxides and of desorbing the nitrogen oxides when the temperature is raised, relative to the absorption temperature, or when the gas composition is changed to a rich mixture, said materials being mixed oxides in which the metals A and B are all octahedrally coordinated and are arranged to form the ilmenite structure ABO3. These materials absorb the nitrogen oxides and do not become poisoned in contact with the sulfur oxides and carbon oxides containing in the gases. In the presence of a group VIII metal, the material is capable of eliminating the adsorbed nitrogen oxides by reduction when the gas composition is changed to a rich mixture.

摘要翻译： 本发明涉及用于除去废气中特别是在含有超化学计量比例的氧化剂的介质中运行的机动车辆的内燃机中存在的氮氧化物NO和NO 2的材料，所述材料能够吸收氮氧化物和解吸附 当温度升高时，氮氧化物相对于吸收温度，或者当气体组成变为浓混合物时，所述材料是金属A和B都是八面体配位的混合氧化物，并被排列以形成钛铁矿 结构ABO3。 这些材料吸收氮氧化物，并且不会与包含在气体中的硫氧化物和碳氧化物接触而中毒。 在VIII族金属的存在下，当气体组成变为浓混合物时，材料能够通过还原来除去吸附的氮氧化物。

公开(公告)号：US06555084B2

公开(公告)日：2003-04-29

申请号：US09802927

申请日：2001-03-12

申请人： Yasuo Ohtsuka

发明人： Yasuo Ohtsuka

IPC分类号： C01B2102

CPC分类号： C01B3/047 ,  Y02E60/364

摘要： The present invention provides a method of decomposing an ammonia gas, including the step of decomposing an ammonia gas, into a nitrogen gas with use of a composite material as a catalyst. The composite material has a carrier made mainly of carbon and at least one kind of an active element which is supported by the carrier and selected from alkaline earth metals and transition metals.

摘要翻译： 本发明提供一种使用复合材料作为催化剂将氨气分解成氮气的方法，包括将氨气分解成氮气的方法。 该复合材料具有主要由碳制成的载体和由载体担载并选自碱土金属和过渡金属的至少一种活性元素。

公开(公告)号：US06488906B1

公开(公告)日：2002-12-03

申请号：US09402473

申请日：1999-10-12

申请人： Yoichi Mori ,  Kiyomi Arakawa

发明人： Yoichi Mori ,  Kiyomi Arakawa

IPC分类号： C01B2102

CPC分类号： B01D53/8625 ,  B01D53/56 ,  B01D53/8621 ,  Y02C20/10

摘要： A process for removing nitrogen oxides in exhaust gases is provided. The process comprises mixing an exhaust gas generated during the chemical vapor deposition process for producing semiconductors and containing dinitrogen monoxide (N2O), nitrogen monoxide (NO) and nitrogen dioxide (NO2) with ammonia (NH3) in an amount 0.5-3 times the sum of the stoichiometric amount corresponding to nitrogen monoxide and the stoichiometric amount corresponding to nitrogen dioxide; and then contacting said mixed gas with a noble metal catalyst at a sufficiently high temperature to decompose dinitrogen monoxide, nitrogen monoxide and nitrogen dioxide. Dinitrogen monoxide (N2O), nitrogen monoxide (NO) and nitrogen dioxide (NO2) in exhaust gases can be treated in one step. No N2O is produced as a by-product.

摘要翻译： 提供了一种去除废气中的氮氧化物的方法。 该方法包括混合在化学气相沉积工艺中产生的用于制备半导体并且含有一氧化二氮（N 2 O），一氧化氮（NO）和二氧化氮（NO 2）与氨（NH 3）的排气，其量为总和的0.5-3倍 对应于一氧化氮的化学计量量和对应于二氧化氮的化学计量量; 然后在足够高的温度下将所述混合气体与贵金属催化剂接触以分解一氧化二氮，一氧化氮和二氧化氮。 排气中的一氧化二氮（N2O），一氧化氮（NO）和二氧化氮（NO2）可以一步处理。 不产生N2O作为副产物。