公开(公告)号：US11278875B2

公开(公告)日：2022-03-22

申请号：US16723145

申请日：2019-12-20

申请人： Lifeng Wang ,  Bjorn Moden ,  James Thomas Hughes ,  Hong-Xin Li

发明人： Lifeng Wang ,  Bjorn Moden ,  James Thomas Hughes ,  Hong-Xin Li

IPC分类号： B01J29/76 ,  B01D53/94 ,  B01J37/00 ,  B01J37/03 ,  B01J37/04 ,  B01J37/08 ,  C01B39/48 ,  G01N30/74

摘要： A metal-containing chabazite zeolite, which has an FTIR peak area ratio between the peak at 900-1300 cm−1 (Si—O—Si asymmetric stretch) and the peak at 765-845 cm−1 (˜805 cm−1 is Si—O—Si symmetric stretch) of at least 55. A method for preparing metal-containing CHA zeolites with high SCR activity at low reaction temperatures from alkali cation-free reaction mixtures that contain the three OSDA structures: metal-polyamine, N,N,N-trimethyl-1-adamantyl ammonium (TMAda+) and TMAOH. The metal-containing CHA zeolites produced by the disclosed method can be identified by XRD, FTIR spectroscopy, FT-VIS spectroscopy, and scanning electron microscopy. A method of selective catalytic reduction of NOx in exhaust gas using the material described herein is also disclosed.