公开(公告)号：US20160288052A1

公开(公告)日：2016-10-06

申请号：US15037070

申请日：2014-12-04

Applicant: CATALER CORPORATION

Inventor： Satoshi MATSUEDA ,  Akimasa HIRAI ,  Kenichi TAKI

IPC: B01D53/94 ,  B01J23/652 ,  B01J23/648 ,  B01J35/00 ,  B01J23/10

CPC classification number: B01D53/945 ,  B01D2255/1021 ,  B01D2255/1023 ,  B01D2255/1025 ,  B01D2255/2065 ,  B01D2255/207 ,  B01D2255/20715 ,  B01D2255/20769 ,  B01D2255/20776 ,  B01D2255/2092 ,  B01D2255/407 ,  B01J23/002 ,  B01J23/10 ,  B01J23/6484 ,  B01J23/6486 ,  B01J23/6525 ,  B01J23/6527 ,  B01J35/002 ,  B01J35/0046 ,  B01J37/03 ,  B01J37/12 ,  B01J2523/00 ,  Y02T10/22 ,  B01J2523/36 ,  B01J2523/3706 ,  B01J2523/3712 ,  B01J2523/48 ,  B01J2523/69 ,  B01J2523/828 ,  B01J2523/68 ,  B01J2523/56 ,  B01J2523/3725 ,  B01J2523/822 ,  B01J2523/57 ,  B01J2523/824

Abstract: The exhaust gas-purifying catalyst of the invention includes a noble metal, and crystallites that form CZ composite metal particles which serve as a carrier supporting the noble metal and contain at least zirconium (Zr) and cerium (Ce). The CZ composite oxide particles (crystallites) further contain crystal growth-suppressing fine particles which are fine metal particles comprising primarily a metallic element M that melts at 1,500° C. or above and which suppress crystal growth by the CZ composite oxide particles. The content of the metallic element M included in the CZ composite oxide particles, expressed in terms of the oxide thereof, is 0.5 mol % or less of the total oxide.

Abstract translation: 本发明的废气净化用催化剂含有贵金属和形成CZ复合金属粒子的微晶，其作为负载贵金属的载体，至少含有锆（Zr）和铈（Ce）。 CZ复合氧化物粒子（微晶）还含有作为主要由1500℃以上熔融的金属元素M构成的微细金属粒子的晶体生长抑制微粒，并抑制CZ复合氧化物粒子的晶体生长。 包含在CZ复合氧化物颗粒中的金属元素M的含量以氧化物计，为总氧化物的0.5mol％以下。

公开(公告)号：US20160199815A1

公开(公告)日：2016-07-14

申请号：US14914299

申请日：2014-12-09

Applicant: CATALER CORPORATION

Inventor： Sho HOSHINO ,  Akimasa HIRAI ,  Kenichi TAKI ,  Satoshi MATSUEDA

IPC: B01J23/63 ,  B01J23/00 ,  B01J35/00

CPC classification number: B01J23/63 ,  B01D53/945 ,  B01D2255/1021 ,  B01D2255/1023 ,  B01D2255/1025 ,  B01D2255/2065 ,  B01D2255/407 ,  B01D2255/902 ,  B01D2255/9032 ,  B01D2255/908 ,  B01D2258/014 ,  B01J23/002 ,  B01J35/0006 ,  B01J35/0013 ,  B01J35/006 ,  B01J2523/00 ,  F01N3/101 ,  F01N2510/0682 ,  F01N2510/0684 ,  Y02T10/22 ,  B01J2523/3706 ,  B01J2523/3712 ,  B01J2523/3725

Abstract: Provided is an exhaust catalyst that exhibits higher NOX-reducing activities at the time of engine restart while maintaining its catalytic activities during normal traveling. This invention provides an exhaust cleaning catalyst comprising a substrate and a catalyst coating layer that includes CeO2. Catalyst coating layer is constituted in its thickness direction with multiple coating layers. In a top coating layer located at the outermost surface, the CeO2 content in a top coating layer's upstream portion is less than the CeO2 content in a top coating layer's downstream portion; and the CeO2 content in the top coating layer's upstream portion is less than the CeO2 content in a lower coating layer. The CeO2 content per liter of catalyst volume in the entire coating layer is 10 g/L to 30 g/L.

Abstract translation: 提供了在发动机重起时表现出更高的NO x还原活性的排气催化剂，同时在正常行驶期间保持其催化活性。 本发明提供一种排气净化催化剂，其包括基体和包括CeO 2的催化剂涂层。 催化剂涂层在其厚度方向上由多个涂层构成。 在位于最外表面的顶部涂层中，顶部涂层的上游部分中的CeO 2含量小于顶部涂层的下游部分中的CeO 2含量; 并且顶涂层的上游部分中的CeO 2含量小于下涂层中的CeO 2含量。 整个涂层中每升催化剂体积的CeO 2含量为10g / L至30g / L。