EFFECT OF PROMOTERS ON V2O5/SIO2 CATALYSTS ACTIVE FOR THE SELECTIVE REDUCTION OF NO

被引：9

作者：

BJORKLUND, RB

JARAS, S

ACKELID, U

ODENBRAND, CUI

ANDERSSON, LAH

BRANDIN, JGM

机构：

[1] EKA NOBEL AB,DIV SPECIAL CHEM,S-44501 SURTE,SWEDEN

[2] UNIV LUND,DEPT CHEM TECHNOL,S-22100 LUND,SWEDEN

来源：

JOURNAL OF CATALYSIS | 1991年 / 128卷 / 02期

关键词：

D O I：

10.1016/0021-9517(91)90315-U

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Vanadia catalysts supported on SiO2 containing 3.5 wt% TiO2 were promoted by Fe and Cu oxides. At 180°C the unpromoted and Fe-promoted catalysts exhibited the highest activities for the selective reduction of NO by NH3. The Fe-promoted catalyst maintained activity in the presence of SO2 during 120 h on-stream. Electrical conductance and mass spectrometric measurements indicated that at 200°C the only reactions occurring were the formation of N2 and H2O from both the NO + NH3 reaction and the self-reaction of NH3. Additional reactions forming NO and N2O from NH3 were observed at 350°C. Poisoning of the catalysts by SO2 was followed by electrical conductance as a decrease in the V(IV) concentration formed from the NO + NH3 reaction. © 1991.

引用

页码：574 / 580

页数：7

共 16 条

[1]

ACKELID U, 1990, SURF INTERFACE ANAL, V16, P381

[2] SELECTIVE CATALYTIC REDUCTION OF NITRIC-OXIDE WITH AMMONIA .2. MONOLAYERS OF VANADIA IMMOBILIZED ON TITANIA SILICA MIXED GELS [J].