Alternative alkali resistant deNOx catalysts

Publication: Research - peer-reviewJournal article – Annual report year: 2012

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Alternative alkali resistant deNOx catalysts. / Putluru, Siva Sankar Reddy; Kristensen, Steffen Buus; Due-Hansen, Johannes; Riisager, Anders; Fehrmann, Rasmus.

In: Catalysis Today, Vol. 184, 2012, p. 192-196.

Publication: Research - peer-reviewJournal article – Annual report year: 2012

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Putluru, Siva Sankar Reddy; Kristensen, Steffen Buus; Due-Hansen, Johannes; Riisager, Anders; Fehrmann, Rasmus / Alternative alkali resistant deNOx catalysts.

In: Catalysis Today, Vol. 184, 2012, p. 192-196.

Publication: Research - peer-reviewJournal article – Annual report year: 2012

Bibtex

@article{e55340058836495aa1565055aa58e325,
title = "Alternative alkali resistant deNOx catalysts",
keywords = "Selective catalytic reduction, Potassium resistivity, Deactivation, NH3-TPD, deNOx",
publisher = "Elsevier BV",
author = "Putluru, {Siva Sankar Reddy} and Kristensen, {Steffen Buus} and Johannes Due-Hansen and Anders Riisager and Rasmus Fehrmann",
year = "2012",
doi = "10.1016/j.cattod.2011.10.012",
volume = "184",
pages = "192--196",
journal = "Catalysis Today",
issn = "0920-5861",

}

RIS

TY - JOUR

T1 - Alternative alkali resistant deNOx catalysts

A1 - Putluru,Siva Sankar Reddy

A1 - Kristensen,Steffen Buus

A1 - Due-Hansen,Johannes

A1 - Riisager,Anders

A1 - Fehrmann,Rasmus

AU - Putluru,Siva Sankar Reddy

AU - Kristensen,Steffen Buus

AU - Due-Hansen,Johannes

AU - Riisager,Anders

AU - Fehrmann,Rasmus

PB - Elsevier BV

PY - 2012

Y1 - 2012

N2 - <p>Alternative alkali resistant deNO<sub>x </sub>catalysts were prepared using three different supports ZrO<sub>2</sub>, TiO<sub>2</sub> and Mordenite zeolite. The majority of the catalysts were prepared by incipient wetness impregnation of a commercial support, with vanadium, copper or iron precursor, one catalyst was prepared by onepot sol–gel method. All catalysts were characterized by BET, XRPD and NH<sub>3</sub>-TPD. Initial SCR activities of 8 out of 9 catalysts showed higher NO conversion at least at one temperature in the temperature range 300–500 ◦C compared to the conventional V<sub>2</sub>O<sub>5</sub>-WO<sub>3</sub>/TiO<sub>2</sub> catalyst. After potassium poisoning (100–130 µmol of K/g of catalyst) the relative drop in SCR activity and acidity was lower for all the alternative catalysts compared to the industrial V<sub>2</sub>O<sub>5</sub>-WO<sub>3</sub>/TiO<sub>2</sub> catalyst. Furthermore, Cu/MOR and Nano-V<sub>2</sub>O<sub>5</sub>/Sul-TiO<sub>2</sub> catalysts showed 8–16 times higher SCR activities than the conventional even after high potassium doping (250 and 280 µmol of K/g, respectively). The increased poisoning resistance was due to high substrate acidity (sulphated, heteropoly acid promoted and zeolite supports), substituting the active species of the catalyst (other than vanadium species, i.e. Cu, Fe) and new catalyst synthesis methods (Nano-V<sub>2</sub>O<sub>5</sub>/Sul-TiO<sub>2</sub> catalyst prepared by sol–gel method).</p>

AB - <p>Alternative alkali resistant deNO<sub>x </sub>catalysts were prepared using three different supports ZrO<sub>2</sub>, TiO<sub>2</sub> and Mordenite zeolite. The majority of the catalysts were prepared by incipient wetness impregnation of a commercial support, with vanadium, copper or iron precursor, one catalyst was prepared by onepot sol–gel method. All catalysts were characterized by BET, XRPD and NH<sub>3</sub>-TPD. Initial SCR activities of 8 out of 9 catalysts showed higher NO conversion at least at one temperature in the temperature range 300–500 ◦C compared to the conventional V<sub>2</sub>O<sub>5</sub>-WO<sub>3</sub>/TiO<sub>2</sub> catalyst. After potassium poisoning (100–130 µmol of K/g of catalyst) the relative drop in SCR activity and acidity was lower for all the alternative catalysts compared to the industrial V<sub>2</sub>O<sub>5</sub>-WO<sub>3</sub>/TiO<sub>2</sub> catalyst. Furthermore, Cu/MOR and Nano-V<sub>2</sub>O<sub>5</sub>/Sul-TiO<sub>2</sub> catalysts showed 8–16 times higher SCR activities than the conventional even after high potassium doping (250 and 280 µmol of K/g, respectively). The increased poisoning resistance was due to high substrate acidity (sulphated, heteropoly acid promoted and zeolite supports), substituting the active species of the catalyst (other than vanadium species, i.e. Cu, Fe) and new catalyst synthesis methods (Nano-V<sub>2</sub>O<sub>5</sub>/Sul-TiO<sub>2</sub> catalyst prepared by sol–gel method).</p>

KW - Selective catalytic reduction

KW - Potassium resistivity

KW - Deactivation

KW - NH3-TPD

KW - deNOx

U2 - 10.1016/j.cattod.2011.10.012

DO - 10.1016/j.cattod.2011.10.012

JO - Catalysis Today

JF - Catalysis Today

SN - 0920-5861

VL - 184

SP - 192

EP - 196

ER -