公开(公告)号：US11331657B2

公开(公告)日：2022-05-17

申请号：US16722936

申请日：2019-12-20

Applicant: Kunming University of Science and Technology

Inventor： Ping Ning ,  Xueqian Wang ,  Qi Wang ,  Langlang Wang ,  Qiang Ma ,  Yingjie Zhang

IPC: B01D53/86 ,  B01J37/04 ,  B01J37/08 ,  B01J23/72 ,  B01J23/83 ,  B01J21/06 ,  B01J35/10

Abstract: The present invention discloses a method of preparing a catalyst for low-temperature synergistic catalytic purification of NOx and HCN in a flue gas, and the use thereof. Citric acid is dissolved in ethanol to obtain a citric acid/ethanol solution; tetrabutyl titanate is added, mixed uniformly to obtain a tetrabutyl titanate-citric acid/ethanol solution; glacial acetic acid is added dropwise to react for 30-40 min to obtain a solution A; the metal salt solution was added dropwise into the solution A, mixed uniformly and added with nitric acid, ammonium hydroxide is added dropwise to adjust the pH value, and the temperature is raised at a constant speed to obtain a gel B; dried and then then baked at a temperature of 300-500° C. for 3-4 h, cooled in the furnace, pulverized, tableted and sieved to obtain the catalyst for the low-temperature synergistic catalytic purification of NOx and HCN in the flue gas.