Characteristics of the low temperature SCR of NOx with NH3 over TiO2

被引：21

作者：

Uddin, Md Azhar ^{[1
]}

Shimizu, Koichiro ^{[1
]}

Ishibe, Koji ^{[1
]}

Sasaoka, Eiji ^{[1
]}

机构：

[1] Okayama Univ, Dept Environm Chem & Mat, Okayama 7008530, Japan

来源：

JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL | 2009年 / 309卷 / 1-2期

关键词：

Low temperature SCR; NOx; TiO2; Activated carbon; SiO2; SELECTIVE CATALYTIC-REDUCTION; VANADIA-TITANIA CATALYSTS; NITRIC-OXIDE; MECHANISM; KINETICS; AMMONIA; ADSORPTION; ACIDITY; ZRO2; SO2;

D O I：

10.1016/j.molcata.2009.06.002

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：

Low temperature selective catalytic reduction (LT-SCR) of NO+NO2 mixture with NH3 was investigated over TiO2, SiO2 and activated carbon in a conventional flow type fixed-bed reactor at 100 degrees C under atmospheric pressure. The effects of gas composition such as presence of SO2 and NH3 and the ratio of NO2/NO in the feed-stream on the LT-SCR have been studied. The presence of SO2 and O-2 was essential for the selective removal of NO with NH3 over TiO2. The presence of SO2 contributed to the oxidation of NO to NO2 over TiO2. If NO2 existed with NO in the reaction system, the presence of SO2 was not necessary for the removal of NO over TiO2. The following two reactions were suggested to occur over TiO2: NO+NO2 + 2NH(3) -> 2N(2) + 3H(2)O (1) and 2NO(2) +2NH(3) -> N-2 + NH4NO3 + H2O (2). The reaction (2) occurred on all three catalysts, however the reaction (1) did not proceed significantly over SiO2. (C) 2009 Elsevier B.V. All rights reserved.

引用

页码：178 / 183

页数：6

共 26 条

[1] SELECTIVE CATALYTIC REDUCTION OF NO(X) USING ZEOLITIC CATALYSTS FOR HIGH-TEMPERATURE APPLICATIONS [J].

BYRNE, JW ;

CHEN, JM ;

SPERONELLO, BK .

CATALYSIS TODAY, 1992, 13 (01) :33-42

[2] ROLE OF WO3 IN MIXED V2O5-WO3/TIO2 CATALYSTS FOR SELECTIVE CATALYTIC REDUCTION OF NITRIC-OXIDE WITH AMMONIA [J].

CHEN, JP ;

YANG, RT .

APPLIED CATALYSIS A-GENERAL, 1992, 80 (01) :135-148

[3] INFRARED AND RAMAN-STUDY OF THE SURFACE-ACIDITY OF TITANIA-SUPPORTED VANADIA CATALYSTS [J].

DINES, TJ ;

ROCHESTER, CH ;

WARD, AM .

JOURNAL OF THE CHEMICAL SOCIETY-FARADAY TRANSACTIONS, 1991, 87 (10) :1611-1616

[4] Formation and reaction of ammonium sulfate salts on V2O5/AC catalyst during selective catalytic reduction of nitric oxide by ammonia at low temperatures [J].

Huang, ZG ;

Zhu, ZP ;

Liu, ZY ;

Liu, QY .

JOURNAL OF CATALYSIS, 2003, 214 (02) :213-219

[5] STRUCTURES OF SUPPORTED VANADIUM-OXIDE CATALYSTS .1. V2O5/TIO2 (ANATASE), V2O5/TIO2 (RUTILE), AND V2O5/TIO2 (MIXTURE OF ANATASE WITH RUTILE) [J].

INOMATA, M ;

MORI, K ;

MIYAMOTO, A ;

UI, T ;

MURAKAMI, Y .

JOURNAL OF PHYSICAL CHEMISTRY, 1983, 87 (05) :754-761

[6] NON-CATALYTIC REDUCTION OF NITROGEN MONOXIDE WITH AMMONIA AND OXIDATION OF AMMONIA WITH OXYGEN [J].

KASAOKA, S ;

SASAOKA, E ;

NAGAHIRO, M ;

KAWAKAMI, K .

NIPPON KAGAKU KAISHI, 1979, (01) :138-144

[7]

KATO A, 1981, J PHYS CHEM-US, V85, P4099, DOI 10.1021/j150626a029

[8] Selective catalytic reduction of NO and NO2 at low temperatures [J].

Koebel, M ;

Madia, G ;

Elsener, M .

CATALYSIS TODAY, 2002, 73 (3-4) :239-247

[9] Reaction pathways in the selective catalytic reduction process with NO and NO2 at low temperatures [J].

Koebel, M ;

Elsener, M ;

Madia, G .

INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH, 2001, 40 (01) :52-59

[10] The effect of water on the acidity of TiO2 and sulfated titania [J].

Kulkarni, AP ;

Muggli, DS .

APPLIED CATALYSIS A-GENERAL, 2006, 302 (02) :274-282

← 1 2 3 →