公开(公告)号：US20230191324A1

公开(公告)日：2023-06-22

申请号：US17926935

申请日：2021-05-19

Applicant: THE JOHNS HOPKINS UNIVERSITY

Inventor： Chao Wang ,  Peikun Wang ,  Zeyuan Sun ,  Pengfei Xie ,  Han Zong

IPC: B01D53/86 ,  B01J23/34 ,  B01D53/02 ,  B01D53/14 ,  F01N3/08

CPC classification number: B01D53/8628 ,  B01J23/34 ,  B01D53/02 ,  B01D53/14 ,  F01N3/0842 ,  B01D2255/2073 ,  B01D2257/404 ,  B01D2258/01 ,  F01N2370/02

Abstract: A Nitrogen Oxide (NOx) sorbent material of the present invention includes a multi-metallic oxide that includes one or more alkali or alkaline earth metal, one or more 3d transition metal, and one or more rare earth element. The NOx sorbent material is configured to adsorb and absorb NOx below a low temperature and to release the adsorbed or absorbed NOx at temperature at or above the low temperature. In some embodiments, a manganese catalyst is deposited on a high surface area carrier. The manganese catalyst takes the form of an alkali/metal promotor and an Mn-based compound. In general, the NOx sorbent material contains about one percent to about fifty percent by weight of alkali/alkaline earth metal manganese catalyst based on the total weight of the catalyst.