Heteropoly acid promoted Cu and Fe catalysts for the selective catalytic reduction of NO with ammonia

被引：53

作者：

Putluru, Siva Sankar Reddy ^{[1
]}

Mossin, Susanne ^{[1
]}

Riisager, Anders ^{[1
]}

Fehrmann, Rasmus ^{[1
]}

机构：

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

来源：

CATALYSIS TODAY | 2011年 / 176卷 / 01期

关键词：

HPA; SCR with ammonia; Potassium poisoning; Deactivation; NH3-TPD; NITROGEN-OXIDES; NITRIC-OXIDE; OXIDATION; ZIRCONIA; DEACTIVATION; COMBUSTION; ADSORPTION; ABATEMENT; SUPPORT; VANADIA;

D O I：

10.1016/j.cattod.2010.11.087

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

Cu/TiO2, Fe/TiO2 and heteropoly acid promoted Cu/TiO2, Fe/TiO2 catalysts were prepared and characterized by N-2 physisorption, XRPD, NH3-TPD, H-2-TPR and EPR. The catalysts exhibited only crystalline TiO2 phases with the active metals and promoters in highly dispersed state. The acidic properties were studied and compared with the catalytic activity for the selective catalytic reduction (SCR) of NO with ammonia. The SCR activities and acidity values of heteropoly acid promoted catalysts were found to be much higher than unpromoted catalysts. The influence of potassium poisons on the SCR activity and acidity was lower for promoted catalysts than for unpromoted catalysts. In the heteropoly acid promoted catalysts the SCR active Cu and Fe metals were protected from potassium poisons by bonding of the potassium to the Bronsted acid centres. Thus heteropoly acid promoted catalysts might be suitable for biomass fired power plant SCR applications. (C) 2011 Elsevier B.V. All rights reserved.

引用

页码：292 / 297

页数：6

共 39 条

[31]

Sainero LMG, 2001, APPL CATAL A-GEN, V208, P63

[32] Vanadia-based SCR catalysts supported on tungstated and sulfated zirconia: Influence of doping with potassium [J].

Skotte, Johannes ;

Boghosian, Soghomon ;

Kustov, Arkady ;

Fristrup, Peter ;

Tsilomelekis, George ;

Stahl, Kenny ;

Christensen, Claus Hviid ;

Fehrmann, Rasmus .

JOURNAL OF CATALYSIS, 2007, 251 (02) :459-473

[33] Thiophene conversion and ethanol oxidation on SiO2-supported 12-PMoV-mixed heteropoly compounds [J].

Spojakina, AA ;

Kostova, NG ;

Sow, B ;

Stamenova, MW ;

Jiratova, K .

CATALYSIS TODAY, 2001, 65 (2-4) :315-321

[34] Acid catalysis by heteropoly acids [J].

Timofeeva, MN .

APPLIED CATALYSIS A-GENERAL, 2003, 256 (1-2) :19-35

[35] The removal of NO, from a lean exhaust gas using storage and reduction on H3PW12O40•6H2O [J].

Vaezzadeh, K ;

Petit, C ;

Pitchon, V .

CATALYSIS TODAY, 2002, 73 (3-4) :297-305

[36]

WOOD SC, 1994, CHEM ENG PROG, V90, P32

[37] A NEW APPROACH TO DECOMPOSITION OF NITRIC-OXIDE USING SORBENT CATALYST WITHOUT REDUCING GAS - USE OF HETEROPOLY COMPOUNDS [J].

YANG, RT ;

CHEN, N .

INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH, 1994, 33 (04) :825-831

[38] Cooperative effect induced by the mixing of Na-ZSM-5 and Pd/H3PW12O40/SiO2 in the selective catalytic reduction of NO with aromatic hydrocarbons [J].

Yoshimoto, Ryosuke ;

Ninomiya, Takashi ;

Okumura, Kazu ;

Niwa, Miki .

APPLIED CATALYSIS B-ENVIRONMENTAL, 2007, 75 (3-4) :175-181

[39] Laboratory investigation of selective catalytic reduction catalysts: Deactivation by potassium compounds and catalyst regeneration [J].

Zheng, YJ ;

Jensen, AD ;

Johnsson, JE .

INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH, 2004, 43 (04) :941-947

← 1 2 3 4 →