公开(公告)号：US20110195007A1

公开(公告)日：2011-08-11

申请号：US12993035

申请日：2008-05-16

申请人： Jong Shik Chung ,  So Ye Park ,  Wang Qiang ,  Ji Hyang Sohn

发明人： Jong Shik Chung ,  So Ye Park ,  Wang Qiang ,  Ji Hyang Sohn

IPC分类号： B01D53/56 ,  B01J21/06 ,  B01J37/08 ,  C01B21/20 ,  C01B21/02

CPC分类号： B01D53/9422 ,  B01D2255/2022 ,  B01D2255/20707 ,  B01D2255/20746 ,  B01D2255/91 ,  B01D2258/012

摘要： The present invention relates to a catalyst for removing NOx contained in exhaust gas, more specifically to a catalyst for removing NOx using metal titanate as a support. The catalyst for removing NOx according to the present invention allows metal titanate to act as a support as well as an adsorption and storage agent (hereafter an adsorption/storage agent) of NOx in lean-burn conditions. Supported noble metals or transition metal components provide a catalyst function which helps adsorption/storage by oxidizing NOx into NO2 in lean-burn conditions and participates in the reaction of reducing the adsorbed and stored NO2 into N2 in fuel-rich conditions. The catalyst according to the present invention has twice the NOx storage amount of conventional catalysts, for example Ba, and enables effective removal even in operational conditions of a wider range than 150˜700° C. In addition, practical use which has been impossible until now is enabled due to the stable NOx removal capability even in conditions where SOx is present in exhaust gas.

摘要翻译： 本发明涉及一种用于除去排气中所含的NOx的催化剂，更具体地说，涉及使用金属钛酸盐作为载体除去NOx的催化剂。 根据本发明的用于除去NOx的催化剂允许金属钛酸盐作为稀燃条件下的NOx的吸附和储存剂（以下称为吸附/储存剂）作为载体。 负载的贵金属或过渡金属组分提供了催化剂功能，其通过在稀燃条件下将NO x氧化成NO 2来帮助吸附/储存，并且参与在富含燃料的条件下将吸附和储存的NO 2还原成N2的反应。 根据本发明的催化剂具有常规催化剂例如Ba的二氧化碳储存量的两倍，并且即使在比150℃至700℃更宽的范围的操作条件下也能够有效去除。另外，实际使用已经不可能直到 即使在废气中存在SOx的条件下，也能够实现稳定的NOx去除能力。