Poisoning effect of K with respect to Cu/ZSM-5 used for NO reduction

被引：24

作者：

Xue, Hongyan ^{[1
,2
]}

Guo, Xiaoming ^{[2
]}

Meng, Tao ^{[2
]}

Mao, Dongsen ^{[2
]}

Ma, Zhen ^{[1
,3
]}

机构：

[1] Fudan Univ, Shanghai Key Lab Atmospher Particle Pollut & Prev, Dept Environm Sci & Engn, Shanghai 200433, Peoples R China

[2] Shanghai Inst Technol, Res Inst Appl Catalysis, Sch Chem & Environm Engn, Shanghai 201418, Peoples R China

[3] Shanghai Inst Pollut Control & Ecol Secur, Shanghai 200092, Peoples R China

来源：

COLLOID AND INTERFACE SCIENCE COMMUNICATIONS | 2021年 / 44卷

关键词：

NH3-SCR; NOx; K poisoning; Cu/ZSM-5; Reaction mechanisms; SELECTIVE CATALYTIC-REDUCTION; IN-SITU DRIFTS; V2O5/WO3-TIO2 SCR CATALYSTS; LOW-TEMPERATURE NH3-SCR; CHEMICAL DEACTIVATION; ENHANCED RESISTANCE; LUBRICATION OILS; OXIDE CATALYST; UREA SOLUTION; NITRIC-OXIDE;

D O I：

10.1016/j.colcom.2021.100465

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：

Cu/ZSM-5 is able to catalyze the reduction of NOx to N-2 (NH3-SCR), but the poisoning effect of K in this regard has been barely studied. Herein, the poisoning effect of K with respect to Cu/ZSM-5 in NH3-SCR was established via catalytic testing, and both Cu/ZSM-5 and K-poisoned Cu/ZSM-5 were probed by using XRD, N-2 sorption, TEM, H-2-TPR, XPS, NH3-TPD, and NO-TPD. In addition to these characterization tools, in-situ DRIFTS was employed to probe the adsorbed species and reaction intermediates, thus giving important information about the possible reaction mechanisms. In all, the presence of K led to decreased exposure of active CuO dispersed on ZSM-5, inhibited the adsorption of NH3 and NOx to some extent, minimized the formation of active bridged nitrate, and facilitated the formation of inactive bidentate nitrate.

引用

页数：9

共 50 条

[1] Poisoning effect of CaO on Cu/ZSM-5 for the selective catalytic reduction of NO with NH3
Xue, Hongyan
Guo, Xiaoming
Wang, Shengdong
Sun, Chao
Yu, Jun
Mao, Dongsen
CATALYSIS COMMUNICATIONS, 2018, 112 : 53 - 57
[2] Peculiarities of the reduction and oxidation of the Cu/ZSM-5 system
Slovetskaya, KI
Alimov, MA
Aleshin, EG
Kucherov, AV
Slinkin, AA
KINETICS AND CATALYSIS, 1996, 37 (01) : 127 - 132
[3] THE NATURE OF CU/ZSM-5 CATALYST ACTIVITY IN NO REDUCTION BY PROPANE
ILICHEV, AN
UKHARSKY, AA
MATYSHAK, VA
MENDELEEV COMMUNICATIONS, 1995, (03) : 118 - 120
[4] Catalytic reduction of NOx over Cu/ZSM-5 catalyst
Tomasic, V
Gomzi, Z
Zrncevic, S
APPLIED CATALYSIS B-ENVIRONMENTAL, 1998, 18 (3-4) : 233 - 240
[5] Effect of Cu loading and addition of modifiers on the stability of Cu/ZSM-5 in lean NOx reduction catalysis
Yan, JY
Sachtler, WMH
Kung, HH
CATALYSIS TODAY, 1997, 33 (1-3) : 279 - 290
[6] Mechanistic cause of hydrocarbon specificity over Cu/ZSM-5 and Co/ZSM-5 catalysts in the selective catalytic reduction of NOx
Adelman, BJ
Beutel, T
Lei, GD
Sachtler, WMH
JOURNAL OF CATALYSIS, 1996, 158 (01) : 327 - 335
[7] Mechanistic Cause of Hydrocarbon Specificity over CU/ZSM-5 and Co/ZSM-5 Catalysts in the Selective Catalytic Reduction of NOx
J Catal, (327):
[8] On the mechanism of selective NOx reduction with alkanes over Cu/ZSM-5
Adelman, BJ
Beutel, T
Lei, GD
Sachtler, WMH
APPLIED CATALYSIS B-ENVIRONMENTAL, 1996, 11 (01) : L1 - L9
[9] Synergic effect of Pd/γ-alumina and Cu/ZSM-5 on the performance of NOx storage reduction catalyst
Shinjoh, Hirohumi
Takahashi, Naoki
Yokota, Kouji
TOPICS IN CATALYSIS, 2007, 42-43 (1-4) : 215 - 219
[10] Effect of Organics on Activity of Cu/ZSM-5 Catalyst for Selective Reduction of NO with NH3
Suzuki, Kunio
Haneda, Masaaki
Sasaki, Motoi
Hamada, Hideaki
JOURNAL OF THE JAPAN PETROLEUM INSTITUTE, 2010, 53 (06) : 355 - 358

← 1 2 3 4 5 →