公开(公告)号：US20220363603A1

公开(公告)日：2022-11-17

申请号：US17619391

申请日：2020-06-17

申请人： SINOCAT ENVIRONMENTAL TECHNOLOGY CO., LTD.

发明人： Dacheng LI ,  Jinfeng WANG ,  Li LAN ,  Hui YE ,  Lan YANG ,  Feng ZHANG ,  Yi YANG ,  Yongxiang CHENG ,  Tiantian LUO ,  Yinhua DONG ,  Yun WANG ,  Yun LI ,  Qizhang CHEN

IPC分类号： C04B35/119 ,  B01J23/10 ,  B01J21/06 ,  B01J21/04 ,  B01J37/02 ,  B01J37/04 ,  B01J37/08 ,  F01N3/10 ,  B01D53/86

摘要： A cerium-zirconium-aluminum-based composite material, a cGPF catalyst and a preparation method thereof are provided. The cerium-zirconium-aluminum-based composite material adopts a stepwise precipitation method, firstly preparing an aluminum-based pre-treated material, then coprecipitating the aluminum-based pre-treated material with zirconium and cerium sol, and finally roasting at high temperature to obtain the cerium-zirconium-aluminum-based composite material. The cerium-zirconium-aluminum-based composite material has better compactness and higher density, and when it is used in cGPF catalyst, it occupies a smaller volume of pores on the catalyst carrier, such that cGPF catalyst has lower back pressure and better ash accumulation resistance, which is beneficial to large-scale application of cGPF catalyst.

公开(公告)号：US20220241726A1

公开(公告)日：2022-08-04

申请号：US17619073

申请日：2020-06-12

申请人： SINOCAT ENVIRONMENTAL TECHNOLOGY CO., LTD.

发明人： Yun WANG ,  Haidi XU ,  Yi DAN ,  Yongxiang CHENG ,  Zhifeng ZHANG ,  Yinhua DONG ,  Dequan CHEN ,  Yaoqiang CHEN ,  Yun LI ,  Qizhang CHEN

IPC分类号： B01D53/94 ,  F01N3/08 ,  B01J29/85 ,  B01J29/74

摘要： A low-temperature NOx storage catalyst for automobile exhaust purification and a preparation method thereof. Loading a noble metal salt solution on molecular sieve by equal volume impregnation method, wherein the noble metal salt solution comprises palladium nitrate and platinum nitrate, and the molecular sieve comprises SSZ, SAPO and BETA, then drying at 60-120° C. for 2-6 h, roasting at 500-550° C. in air for 2-5 h, and further roasting at 750-850° C. in air for 2-5 h, and then mixing with aluminum sol, ball milling and pulping, and then coating the slurry on a carrier, wherein the loading on the coating is 100-250 g/L and the noble metal content is 10-150 g/ft3, drying at 60-120° C. for 2-6 h, then roasting at 500-550° C. in air for 2-5 h, and further continuing roasting at 750-850° C. in air for 2-5 h, to obtain the catalyst. Loading the noble metals Pt and Pd into a pore channel of a molecular sieve improves NOx storage capacity of a catalyst at low temperatures, and selecting a different type of molecular sieve as an NOx storage unit and increasing a roasting temperature of a molecular sieve material on which Pt and Pd are loaded significantly increases NOx storage capacity.