Heteropoly acid promoted V2O5/TiO2 catalysts for NO abatement with ammonia in alkali containing flue gases

被引：71

作者：

Putluru, Siva Sankar Reddy ^{[1
,2
]}

Jensen, Anker Degn ^{[2
]}

Riisager, Anders ^{[1
]}

Fehrmann, Rasmus ^{[1
]}

机构：

[1] Tech Univ Denmark, Ctr Catalysis & Sustainable Chem, Dept Chem, DK-2800 Lyngby, Denmark

[2] Tech Univ Denmark, Combust & Harmful Emiss Control Res Ctr, Dept Chem & Biochem Engn, DK-2800 Lyngby, Denmark

来源：

CATALYSIS SCIENCE & TECHNOLOGY | 2011年 / 1卷 / 04期

关键词：

LEAN EXHAUST-GAS; NITROGEN-OXIDES; NITRIC-OXIDE; REDUCTION; H3PW12O40-CENTER-DOT-6H(2)O; ZIRCONIA; VANADIA; TITANIA; SCR; TEMPERATURE;

D O I：

10.1039/c1cy00081k

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：

V2O5/TiO2 and heteropoly acid promoted V2O5/TiO2 catalysts were prepared and characterized by N-2 physisorption, XRPD and NH3-TPD. The influence of the calcination temperature from 400 to 700 degrees C on crystallinity and acidic properties was studied and compared with the activity for the selective catalytic reduction (SCR) of NO with ammonia. The SCR activity of heteropoly acid promoted catalysts was found to be much higher than for unpromoted catalysts. The stability of heteropoly acid promoted catalysts is dependent on calcination temperature and there is a gradual decrease in SCR activity and acidity with increase in calcination temperatures. Furthermore, the heteropoly acid promoted V2O5/TiO2 catalysts showed excellent alkali deactivation resistance and might therefore be alternative deNO(x) catalysts in biomass fired power plants.

引用

页码：631 / 637

页数：7

共 30 条

[1] Heteropoly acids as catalysts for liquid-phase esterification and transesterification [J].

Alsalme, Ali ;

Kozhevnikova, Elena F. ;

Kozhevnikov, Ivan V. .

APPLIED CATALYSIS A-GENERAL, 2008, 349 (1-2) :170-176

[2] A COMPARATIVE-STUDY OF THE ADSORPTION AND REACTION OF NITROGEN-OXIDES ON 12-TUNGSTOPHOSPHORIC, 12-TUNGSTOSILICIC, AND 12-MOLYBDOPHOSPHORIC ACIDS [J].

BELANGER, R ;

MOFFAT, JB .

JOURNAL OF CATALYSIS, 1995, 152 (01) :179-188

[3] Zirconia-supported heteropoly acids: Characterization and catalytic behavior in liquid-phase veratrole benzoylation [J].

Devassy, BM ;

Halligudi, SB .

JOURNAL OF CATALYSIS, 2005, 236 (02) :313-323

[4] An acidity scale for Bronsted acids including H3PW12O40 [J].

Drago, RS ;

Dias, JA ;

Maier, TO .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1997, 119 (33) :7702-7710

[5] Tungstated zirconia as promising carrier for DeNOx catalysts with improved resistance towards alkali poisoning [J].

Due-Hansen, Johannes ;

Kustov, Arkady L. ;

Rasmussen, Soren Birk ;

Fehrmann, Rasmus ;

Christensen, Claus H. .

APPLIED CATALYSIS B-ENVIRONMENTAL, 2006, 66 (3-4) :161-167

[6] Structure of WOx/TiO2 catalysts prepared from hydrous titanium oxide hydroxide:: Influence of preparation parameters [J].

Eibl, S ;

Gates, BC ;

Knözinger, H .

LANGMUIR, 2001, 17 (01) :107-115

[7] Storage and reduction of lean-NOx by using H3PW12O40•6H2O supported on TixZr1-xO4 [J].

Gómez-García, MA ;

Pitchon, V ;

Kiennemann, A .

CATALYSIS TODAY, 2005, 107-08 :60-67

[8]

Hill C.L., 1998, Chem. Rev, V98

[9] The mechanism of the selective NOx sorption on H3PW12O40•6H2O (HPW) [J].

Hodjati, S ;

Vaezzadeh, K ;

Petit, C ;

Pitchon, V ;

Kiennemann, A .

TOPICS IN CATALYSIS, 2001, 16 (1-4) :151-155

[10] Removal of NOX from a lean exhaust gas by absorption on heteropolyacids:: Reversible sorption of nitrogen oxides in H3PW12O40•6H2O [J].

Hodjati, S ;

Petit, C ;

Pitchon, V ;

Kiennemann, A .

JOURNAL OF CATALYSIS, 2001, 197 (02) :324-334

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