公开(公告)号：US11717815B2

公开(公告)日：2023-08-08

申请号：US17796881

申请日：2020-12-29

Applicant: VALIANT CO., LTD.

Inventor： Xiaoling Liu ,  Hu Yuan ,  Songwei Xie ,  Fanmin Meng

IPC: B01J37/08 ,  B01J35/04

CPC classification number: B01J37/08 ,  B01J35/04 ,  B01J2523/3712 ,  B01J2523/47 ,  B01J2523/55 ,  B01J2523/68 ,  B01J2523/69 ,  B01J2523/72 ,  B01J2523/845 ,  B01J2523/847

Abstract: A method for preparing an active catalyst for high-efficiency denitration is disclosed. The method includes: a catalyst raw material is charged into a denitration reactor, NH3 and an inert gas are introduced and then heating is performed, and the temperature is held and then natural cooling is performed, thereby obtaining the catalyst. The active catalyst can greatly improve the denitration activity in low temperature range, and can not only improve the denitration efficiency under the condition without SO2 and H2O, but also can improve the denitration efficiency under the condition with both SO2 and H2O. The service life of the catalyst is prolonged under the premise of not changing the existing catalyst preparation process, and the economic benefit is significant. The denitration efficiency of a powder catalyst can be increased by 25%, and the denitration efficiency of a honeycombed catalyst or a corrugated catalyst can be increased by 20%.

公开(公告)号：US10596557B2

公开(公告)日：2020-03-24

申请号：US16087229

申请日：2016-12-27

Applicant: VALIANT CO., LTD.

Inventor： Li Sun ,  Yongzhen Xu ,  Quansheng Li ,  Xiaoling Liu ,  Baohua Hu ,  Ming Cui ,  Yingjie Tang ,  Yuchang Wang ,  Zhenlei Zhou

IPC: B01J29/06 ,  B01J29/24 ,  B01J29/26 ,  B01J29/14 ,  B01J29/48 ,  B01J29/76 ,  B01J29/78 ,  B01J29/85 ,  B01J37/30 ,  B01J37/04 ,  B01J37/06 ,  B01J37/00 ,  B01D53/86 ,  B01J29/46 ,  B01J23/00 ,  B01J29/072 ,  B01J35/04 ,  B01J35/06 ,  B01J29/70 ,  B01J29/16 ,  B01J37/03 ,  B01J29/076 ,  B01J29/83 ,  B01J37/08 ,  B01J29/80 ,  B01J35/02

Abstract: A preparation method for a molecular sieve-multiple oxide composite integral extrusion type denitration catalyst includes constructing an organic structure coating on the surface of a metal ion-exchanged molecular sieves and synchronously adding multiple oxide components, thus obtaining an ion-exchanged molecular sieve-multiple oxide composite denitration catalyst active component; and then mixing, kneading into paste, staling, carrying out integral extrusion forming, drying, and calcining, thus obtaining the integral extrusion type denitration catalyst. The molecular sieve-multiple oxide composite integral extraction type denitration catalyst has a denitration efficiency more than 80% at the temperature ranging from 250° C. to 420° C. in the presence of 10% steam and 500 ppm sulfuric dioxide.