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You searched for: Subject term catalysts Remove constraint Subject term: catalysts Subject term nitric oxide Remove constraint Subject term: nitric oxide Subject term chemical reactions Remove constraint Subject term: chemical reactions
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1. A superior catalyst for low-temperature NO reduction with NH₃

Author:
Gongshin Qi; Ralph T. Yang
Source:
Chemical communications 2003 v. no.7 pp. 848-849
ISSN:
1364-548X
Subject:
ammonia; catalysts; chemical reactions; nitric oxide; sulfur dioxide
Abstract:
... Mn-Ce mixed-oxide catalyst yields nearly 100% NO conversion at 100–150 °C at a high space velocity of 42,000 h⁻¹. SO₂ and H₂O (at high concentrations) have only slight effects on the activity. ...
DOI:
10.1039/b212725c

2. A “Nitrate Route” for the low temperature “Fast SCR” reaction over a V₂O₅–WO₃/TiO₂ commercial catalyst

Author:
Cristian Ciardelli; Isabella Nova; Enrico Tronconi; Daniel Chatterjee; Brigitte Bandl-Konrad
Source:
Chemical communications 2004 v. no.23 pp. 2718-2719
ISSN:
1364-548X
Subject:
ammonia; ammonium nitrate; catalysts; chemical reactions; nitric oxide; nitrogen dioxide; temperature; titanium dioxide; tungsten oxide
Abstract:
... A novel mechanism is proposed for the Fast SCR reaction of NH₃, NO and NO₂ at low temperature involving the formation of ammonium nitrate as intermediate and its subsequent reaction with NO as the rate determining step. ...
DOI:
10.1039/b411613e

3. Aryl–aryl interactions as directing motifs in the stereodivergent iron-catalyzed hydrosilylation of internal alkynes

Author:
Christian Belger; Bernd Plietker
Source:
Chemical communications 2012 v.48 no.44 pp. 5419-5421
ISSN:
1364-548X
Subject:
alkynes; carbon monoxide; catalysts; catalytic activity; chemical communication; chemical reactions; hydrides; iron; nitric oxide; silane
Abstract:
... The defined Fe hydride complex FeH(CO)(NO)(Ph₃P)₂ is highly active as a catalyst for selective hydrosilylation of internal alkynes to vinylsilanes. Depending on the silane employed either E- or Z-selective hydrosilylation products were formed in excellent yields and good to excellent stereoselectivities. ...
DOI:
10.1039/c2cc31395b

4. Binuclear Fe-complexes as catalysts for the ligand-free regioselective allylic sulfenylation

Author:
Michael S. Holzwarth; Wolfang Frey; Bernd Plietker
Source:
Chemical communications 2011 v.47 no.39 pp. 11113-11115
ISSN:
1364-548X
Subject:
catalysts; chemical reactions; iron; nitric oxide; regioselectivity; temperature; tetrabutylammonium compounds; thiols
Abstract:
... Binuclear Fe-complexes that are readily prepared by treating Bu₄N[Fe(CO)₃(NO)] with an excess of thiol or from Fe-salts under reductive conditions are potent catalysts for the regioselective allylic sulfenylation. Low catalyst loadings of only 0.25 mol% and reaction temperatures of only 40 °C allow for the coupling of functionalized allylic starting materials with functionalized mercaptans in good ...
DOI:
10.1039/c1cc14599a

5. Comprehensive study combining surface science and real catalyst for NO direct decomposition

Author:
Masaaki Haneda; Yoshiaki Kintaichi; Isao Nakamura; Tadahiro Fujitani; Hideaki Hamada
Source:
Chemical communications 2002 v. no.23 pp. 2816-2817
ISSN:
1364-548X
Subject:
aluminum oxide; catalysts; catalytic activity; chemical reactions; models; nitric oxide; palladium
Abstract:
... The catalytic activity of Pd/Al₂O₃ prepared from various palladium precursors for direct NO decomposition is closely related to the fraction of surface step sites capable of dissociating NO, on the basis of a surface science study using single-crystal model catalyst. ...
DOI:
10.1039/b207619e

6. Exposed metal oxide active sites on mesoporous titania channels: a promising design for low-temperature selective catalytic reduction of NO with NH₃

Author:
Jianwei Fan; Menghua Lv; Wei Luo; Xianqiang Ran; Yonghui Deng; Wei-xian Zhang; Jianping Yang
Source:
Chemical communications 2018 v.54 no.30 pp. 3783-3786
ISSN:
1364-548X
Subject:
active sites; ammonia; catalysts; chemical reactions; cupric oxide; manganese dioxide; nitric oxide; porous media; sulfur dioxide; titanium dioxide
Abstract:
... A subtle catalyst design is provided with stably incorporated binary catalytically active centers of CuO and MnO₂ on the surface wall of mesoporous TiO₂. Such unique features render these mesoporous composites highly promising in the low-temperature selective catalytic reduction of NO with NH₃, including high NO conversion efficiency, and superior H₂O and SO₂ resistance. ...
DOI:
10.1039/c8cc01003j

7. Fe–Ce–ZSM-5 a new catalyst of outstanding properties in the selective catalytic reduction of NO with NH₃

Author:
G. Carja; G. Delahay; C. Signorile; B. Coq
Source:
Chemical communications 2004 v. no.12 pp. 1404-1405
ISSN:
1364-548X
Subject:
ammonia; catalysts; catalytic activity; chemical reactions; nitric oxide; sulfur dioxide; temperature
Abstract:
... A Fe–Ce–ZSM-5 catalyst elaborated from a new synthesis route exhibits very high NO conversion (75–100%) in the selective catalytic reduction of NO by NH₃ in a wide temperature window (523–823 K), even in the presence of H₂O and SO₂. ...
DOI:
10.1039/b402660h

8. Graphitic carbon nitride as a metal-free catalyst for NO decomposition

Author:
Junjiang Zhu; Yuechang Wei; Wenkai Chen; Zhen Zhao; Arne Thomas
Source:
Chemical communications 2010 v.46 no.37 pp. 6965-6967
ISSN:
1364-548X
Subject:
carbon nitride; catalysts; catalytic activity; chemical communication; chemical reactions; electrons; graphene; nitric oxide; polymers; temperature
Abstract:
... Polymeric carbon nitride is reported to be a promising candidate in environmental catalysis for NO decomposition carried out at elevated temperature. Theoretical calculations support a mechanism where Lewis basic site of g-C₃N₄ can donate electrons to the adsorbed NO, decreasing the bond order of N–O thus facilitating the reaction. ...
DOI:
10.1039/c0cc01432j

9. Ir/SiO₂ as a highly active catalyst for the selective reduction of NO with CO in the presence of O₂ and SO₂

Author:
Masaaki Haneda; Tomohiro Yoshinari; Kazuhito Sato; Yoshiaki Kintaichi; Hideaki Hamada
Source:
Chemical communications 2003 v. no.22 pp. 2814-2815
ISSN:
1364-548X
Subject:
carbon monoxide; catalysts; catalytic activity; chemical reactions; iridium; nitric oxide; nitrogen; oxygen; silica; sulfur dioxide
Abstract:
... Coexisting SO₂ considerably enhanced the catalytic activity of Ir/SiO₂ for NO reduction with CO in the presence of O₂ because of the formation of a cis-type coordinated species of NO and CO to one iridium atom (), a possible reaction intermediate leading to N₂ formation. ...
DOI:
10.1039/b309981d

10. Ligand-assisted mechanochemical synthesis of ceria-based catalysts for the selective catalytic reduction of NO by NH₃

Author:
J. F. Yan; W. G. Qiu; L. Y. Song; Y. Chen; Y. C. Su; G. M. Bai; G. Z. Zhang; H. He
Source:
Chemical communications 2017 v.53 no.7 pp. 1321-1324
ISSN:
1364-548X
Subject:
ammonia; catalysts; cerium; chemical reactions; ions; ligands; mechanochemistry; milling; nitric oxide
Abstract:
... CeO₂/TiO₂ catalysts were fabricated by dry ball milling in the presence or absence of an organic ligand. It was found that the catalysts prepared by ligand-assisted ball milling exhibited high NH₃-SCR activities due to the interaction between cerium ions and ligand molecules resulting in good dispersion, a high Ce³⁺ ratio and high reducibility of cerium species. ...
DOI:
10.1039/c6cc09229b

11. Little do more: a highly effective Pt₁/FeOₓ single-atom catalyst for the reduction of NO by H₂

Author:
Jian Lin; Botao Qiao; Ning Li; Lin Li; Xiucheng Sun; Jingyue Liu; Xiaodong Wang; Tao Zhang
Source:
Chemical communications 2015 v.51 no.37 pp. 7911-7914
ISSN:
1364-548X
Subject:
adsorption; catalysts; chemical bonding; chemical reactions; dissociation; hydrogen; nanomaterials; nitric oxide; nitrogen; oxygen; platinum
Abstract:
... A FeOₓ supported Pt single-atom catalyst (Pt-SAC) exhibited much higher NO conversion and selectivity to N₂ than the supported Pt nanocatalyst (Pt-Nano). This better performance was attributed to not only the stronger NO adsorption and easier dissociation of the N–O bond but also the presence of more oxygen vacancies on the Pt-SAC. ...
DOI:
10.1039/c5cc00714c

12. Low temperature selective catalytic reduction (SCR) of NO with NH₃ over Fe–Mn based catalysts

Author:
Richard Q. Long; Ralph T. Yang; Ramsay Chang
Source:
Chemical communications 2002 v. no.5 pp. 452-453
ISSN:
1364-548X
Subject:
ammonia; catalysts; catalytic activity; chemical reactions; nitric oxide; temperature
Abstract:
... Fe–Mn based transition metal oxides (Fe–Mn, Fe–Mn–Zr and Fe–Mn–Ti) show nearly 100% NO conversion at 100–180 °C for selective catalytic reduction of NO with NH₃ under the applied conditions with a space velocity of 15 000 h⁻¹. ...
DOI:
10.1039/b111382h

13. Mechanism of Rh(III)-catalyzed cyclopropanation using N-enoxyphthalimides and alkenes: Insights from DFT calculations

Author:
Jiaojiao Deng; Xiuling Wen; Zhiping Qiu; Juan Li
Source:
Tetrahedron 2016 pp. -
ISSN:
0040-4020
Subject:
alkenes; catalysts; chemical reactions; chemical structure; energy; models; nitric oxide; rhodium
Abstract:
... The Rh(III)-catalyzed cyclopropanation reaction using N-enoxyphthalimides and alkenes developed by Rovis group [J. Am. Chem. Soc.2014, 136, 11292−11295] provided an efficient method for the constructions of trans 1,2-disubstituted cyclopropanes in which an elegant control of the diastereoselectivities was achieved. In the current report we aimed at uncovering the mechanism and diastereoselectivity ...
DOI:
10.1016/j.tet.2016.11.017

14. Mesostructured amorphous manganese oxides: facile synthesis and highly durable elimination of low-concentration NO at room temperature in air

Author:
Yanyan Du; Zile Hua; Weimin Huang; Meiying Wu; Min Wang; Jin Wang; Xiangzhi Cui; Lingxia Zhang; Hangrong Chen; Jianlin Shi
Source:
Chemical communications 2015 v.51 no.27 pp. 5887-5889
ISSN:
1364-548X
Subject:
active sites; air; ambient temperature; catalysts; chemical reactions; manganese oxides; nitric oxide; relative humidity
Abstract:
... At a high space velocity of 120 000 mL g⁻¹ h⁻¹ and a relative humidity of 50–90%, 98% removal of 10 ppm NO has been achieved for over 237 h and no sign of deactivation was observed with mesostructured amorphous manganese oxides (AMO), due to the prevention of the catalyst active sites from deactivation. ...
DOI:
10.1039/c5cc00269a

15. Microwave selective effect: a new approach towards oxygen inhibition removal for highly-effective NO decomposition by microwave catalysis over BaMnₓMg₁₋ₓO₃ mixed oxides at low temperature under excess oxygen

Author:
Wentao Xu; Jicheng Zhou; Yingpiao Ou; Yushang Luo; Zhimin You
Source:
Chemical communications 2015 v.51 no.19 pp. 4073-4076
ISSN:
1364-548X
Subject:
catalysts; catalytic activity; chemical reactions; nitric oxide; nitrogen; oxygen; temperature
Abstract:
... A significant microwave selective effect on oxygen inhibition removal was found for NO decomposition through microwave catalysis over BaMnₓMg₁₋ₓO₃ catalysts. Especially, the NO conversion and N₂ selectivity were up to 99.8% and 99.9%, respectively for the BaMn₀.₉Mg₀.₁O₃ catalyst even with the coexistence of 10% oxygen and low temperature of 250 °C. ...
DOI:
10.1039/c4cc10288f

16. New approaches to high-activity transition-metal catalysts for carbon–carbon bond forming reactions. Rhenium-containing phosphorus donor ligands for palladium-catalyzed Suzuki cross-couplings

Author:
Sandra Eichenseher; Klemenz Kromm; Olivier Delacroix; J. A. Gladysz
Source:
Chemical communications 2002 v. no.10 pp. 1046-1047
ISSN:
1364-548X
Subject:
catalysts; catalytic activity; chemical bonding; chemical reactions; ligands; moieties; nitric oxide; organobromine compounds; palladium; phosphorus; rhenium; toluene
Abstract:
... The rhenium complexes (η⁵-C₅H₅)Re(NO)(PPh₃)((CH₂)ₙPR₂:) (n/R = 0/Ph, 0/t-Bu, 0/Me, 1/Ph, 1/t-Bu), which contain electron-rich and sterically congested phosphido moieties, give active catalysts for the title reaction; typical conditions (toluene, 60–100 °C): aryl bromide (1.0 equiv.), PhB(OH)₂ (1.5 equiv.), K₃PO₄ (2.0 equiv.), Pd(OAc)₂ (1 mol%), and a Re(CH₂)ₙPR₂: species or a 1∶2 [Re(CH₂)ₙPR₂H]⁺X⁻ ...
DOI:
10.1039/b201512a

17. Nitrous oxide free pathway for selective reduction of NO by hydrogen over supported Pt catalysts

Author:
Atsushi Satsuma; Masanori Hashimoto; Junji Shibata; Hisao Yoshida; Tadashi Hattori
Source:
Chemical communications 2003 v. no.14 pp. 1698-1699
ISSN:
1364-548X
Subject:
ammonium; catalysts; catalytic activity; chemical reactions; hydrogen; nitric oxide; nitrous oxide; oxygen; platinum
Abstract:
... The presence of strong acid sites on a metal oxide support results in a reaction of adsorbed NH₄⁺ species in a flow of NO + O₂, which is a N₂O free pathway in selective catalytic reduction of NO by H₂ over supported Pt catalysts. ...
DOI:
10.1039/b304806n

18. Novel iron titanate catalyst for the selective catalytic reduction of NO with NH₃ in the medium temperature range

Author:
Fudong Liu; Hong He; Changbin Zhang
Source:
Chemical communications 2008 v. no.17 pp. 2043-2045
ISSN:
1364-548X
Subject:
ammonia; catalysts; catalytic activity; chemical reactions; coprecipitation; crystallites; durability; iron; nitric oxide; sulfur dioxide; temperature
Abstract:
... An iron titanate catalyst with a crystallite phase, prepared by a co-precipitation method, showed excellent activity, stability, selectivity and SO₂/H₂O durability in the selective catalytic reduction of NO with NH₃ in the medium temperature range. ...
DOI:
10.1039/b800143j

19. Porous nanopeapod Pd catalyst with excellent stability and efficiency

Author:
Xuecheng Chen; Chao Zhang; Ryszard J. Kalenczuk; Paul K. Chu; Dengsong Zhang; Tao Tang; Ewa Mijowska
Source:
Chemical communications 2017 v.53 no.4 pp. 740-742
ISSN:
1364-548X
Subject:
ammonia; catalysts; catalytic activity; chemical reactions; hydrogen; nanoparticles; nitric oxide; nitrobenzenes; palladium; porous media; silica; surface area
Abstract:
... Porous Pd@m-C/SiO₂ nanopeapods are prepared by a nanoconfinement method. The Pd nanoparticles show high efficiency and stability in chemical reactions such as reduction of nitrobenzene by H₂ and reduction of NO by NH₃. The high catalytic activity is attributed to the unique peapod structure, mesoporous wall, and large specific surface area on Pd@m-C/SiO₂ rendering the Pd nanoparticles highly activ ...
DOI:
10.1039/c6cc08598a

20. Rational design of alkali-resistant catalysts for selective NO reduction with NH₃

Author:
Chao Li; Zhiwei Huang; Xiaona Liu; Junxiao Chen; Weiye Qu; Xiaoming Jiang; Hu Wang; Zhen Ma; Xingfu Tang; Yaxin Chen
Source:
Chemical communications 2019 v.55 no.66 pp. 9853-9856
ISSN:
1364-548X
Subject:
active sites; ammonia; catalysts; chemical reactions; nitric oxide
Abstract:
... A rationale for designing selective NO reduction catalysts with strong alkali resistance was proposed, based on extensive studies of a variety of catalysts with common characteristics of separate catalytically active sites and alkali-trapping sites. ...
DOI:
10.1039/c9cc04178h

21. Selective catalytic reduction of NOₓ with propene over CeO₂-ferrierite

Author:
K. Krishna; G. B. F. Seijger; C. M. van den Bleek; H. van Bekkum; H. P. A. Calis
Source:
Chemical communications 2002 v. no.9 pp. 948-949
ISSN:
1364-548X
Subject:
catalysts; catalytic activity; chemical reactions; mixing; nitric oxide; propylene
Abstract:
... CeO₂-HFerrierite catalysts, prepared by physically mixing the components, showed very high conversions of NO under dry and wet conditions and excellent regeneration properties of the coked catalyst in the presence of water. ...
DOI:
10.1039/b201699k

22. Susceptibility of a heterogeneous catalyst, Rh/γ-alumina, to rapid structural change by exposure to NO

Author:
Tom Campbell; Andrew J. Dent; Sofia Diaz-Moreno; John Evans; Steven G. Fiddy; Mark A. Newton; Sandra Turin
Source:
Chemical communications 2002 v. no.4 pp. 304-305
ISSN:
1364-548X
Subject:
aluminum oxide; catalysts; chemical reactions; heat production; nitric oxide; particle size; rhodium
Abstract:
... Metal particles in a Rh/γ-Al₂O₃ catalyst of differing particle size are oxidised by NO/He within 5 seconds at 313 K; rapid, highly exothermic dissociative chemisorption of NO is the initial step. ...
DOI:
10.1039/b106846f

23. Synchronous, time resolved, diffuse reflectance FT-IR, energy dispersive EXAFS (EDE) and mass spectrometric investigation of the behaviour of Rh catalysts during NO reduction by CO

Author:
Mark A. Newton; Bhrat Jyoti; Andrew J. Dent; Steven G. Fiddy; John Evans
Source:
Chemical communications 2004 v. no.21 pp. 2382-2383
ISSN:
1364-548X
Subject:
Fourier transform infrared spectroscopy; X-ray absorption spectroscopy; aluminum oxide; carbon monoxide; catalysts; chemical reactions; energy; mass spectrometry; nitric oxide; reflectance; rhodium
Abstract:
... Synchronous, time resolved, infra-red, XAFS, and mass spectroscopies are simultaneously applied in situ to the investigation of the dynamic behaviour of Rh/Al₂O₃ catalysts during NO reduction by CO; NO conversion, and its kinetic character are closely correlated to the conversion of Rh(i) (predominantly Rhᴵ(CO)₂) to Rh(0). ...
DOI:
10.1039/b405694a

24. Synthesis and Evaluation of O2-Derived Diazeniumdiolates Activatable via Bioorthogonal Chemistry Reactions in Living Cells

Author:
Tian Lv; Jianbing Wu; Fenghua Kang; Tingting Wang; Boheng Wan; Jin-Jian Lu; Yihua Zhang; Zhangjian Huang
Source:
Organic letters 2018 v.20 no.8 pp. 2164-2167
ISSN:
1523-7052
Subject:
catalysts; chemical reactions; chemical structure; cleavage (chemistry); neoplasm cells; neoplasms; nitric oxide; organic compounds; palladium
Abstract:
... A class of O²-alkyl derived diazeniumdiolates 3a–f and 4a–c were designed and synthesized as new bioorthogonal NO precursors, which can be effectively uncaged in the presence of a palladium catalyst via bioorthogonal bond cleavage reactions to generate NO in living cancer cells, eliciting potent antiproliferative activity. ...
DOI:
10.1021/acs.orglett.8b00423

25. Synthesis of highly loaded Cu/Ce mesoporous silica. Active catalyst for the simultaneous reduction of SO₂ and NO with CO

Author:
Constantinos C. Pantazis; Philippos J. Pomonis
Source:
Chemical communications 2006 v. no.12 pp. 1268-1270
ISSN:
1364-548X
Subject:
carbon monoxide; catalysts; chemical reactions; copper; nitric oxide; nitrogen; porous media; silica; sulfur; sulfur dioxide; surface area; thermal stability
Abstract:
... We report the synthesis of a thermally stable, highly loaded (15 wt.%) Cu/Ce bimetallic mesoporous silica with high surface area and metal dispersion, which was the first template assisted mesoporous network successfully tested for the simultaneous reduction of SO₂ and NO with CO, achieving complete conversion of the reactants to elemental sulfur and N₂ at high space velocity 32 000 h⁻¹. ...
DOI:
10.1039/b516450h

26. The Biologically Relevant Coordination Chemistry of Iron and Nitric Oxide: Electronic Structure and Reactivity

Author:
Nicolai Lehnert; Eunsuk Kim; Hai T. Dong; Jill B. Harland; Andrew P. Hunt; Elizabeth C. Manickas; Kady M. Oakley; John Pham; Garrett C. Reed; Victor Sosa Alfaro
Source:
Chemical reviews 2021 v.121 no.24 pp. 14682-14905
ISSN:
1520-6890
Subject:
biomedical research; biosynthesis; catalysts; chemical reactions; coordination compounds; energy; geometry; guanylate cyclase; heme; iron; nitric oxide; nitric oxide synthase; nitrites
Abstract:
... Nitric oxide (NO) is an important signaling molecule that is involved in a wide range of physiological and pathological events in biology. Metal coordination chemistry, especially with iron, is at the heart of many biological transformations involving NO. A series of heme proteins, nitric oxide synthases (NOS), soluble guanylate cyclase (sGC), and nitrophorins, are responsible for the biosynthesis ...
DOI:
10.1021/acs.chemrev.1c00253

27. The atmospheric budget of oxidized nitrogen and its role in ozone formation and deposition

Author:
Fowler, D.; Flechard, C.; Skiba, U.; Coyle, M.; Cape, J.N.
Source:
New phytologist 1998 v.139 no.1 pp. 11-23
ISSN:
0028-646X
Subject:
volatile compounds; canopy; soil temperature; nitric oxide; chemical reactions; catalysts; ozone; nutrient uptake; plant cuticle; soil microorganisms; seasonal variation; soil water; diurnal variation; nitrogen dioxide; stomata; air pollution; biogeochemical cycles
DOI:
10.1046/j.1469-8137.1998.00167.x

28. The relationship between structure and activity of MoO₃–CeO₂ catalysts for NO removal: influences of acidity and reducibility

Author:
Yue Peng; Ruiyang Qu; Xueying Zhang; Junhua Li
Source:
Chemical communications 2013 v.49 no.55 pp. 6215-6217
ISSN:
1364-548X
Subject:
acidity; catalysts; ceric oxide; cerium; chemical communication; chemical reactions; nitrates; nitric oxide; nitrites
Abstract:
... The SCR activities of MoO₃–CeO₂ catalysts are enhanced by both Lewis and Brønsted acidities provided by surface cerium atoms and amorphous MoO₃ structures, respectively, but are suppressed by stable adsorbed nitrate or nitrite species on the defect sites of CeO₂. ...
DOI:
10.1039/c3cc42693a

29. Very active CeO₂-zeolite catalysts for NOₓ reduction with NH₃

Author:
K. Krishna; G. B. F. Seijger; C. M. van den Bleek; H. P. A. Calis
Source:
Chemical communications 2002 v. no.18 pp. 2030-2031
ISSN:
1364-548X
Subject:
ammonia; catalysts; catalytic activity; chemical reactions; nitric oxide
Abstract:
... Selective catalytic reduction of NO with NH₃ over high weight percentage CeO₂-zeolites showed excellent NOₓ conversions at very high space velocities under simulated exhaust gas conditions in the presence of H₂O. ...
DOI:
10.1039/b205294f

30. WO₃/CeO₂-ZrO₂, a promising catalyst for selective catalytic reduction (SCR) of NOₓ with NH₃ in diesel exhaust

Author:
Ye Li; Hao Cheng; Deyi Li; Yongsheng Qin; Yuming Xie; Shudong Wang
Source:
Chemical communications 2008 v. no.12 pp. 1470-1472
ISSN:
1364-548X
Subject:
ammonia; carbon dioxide; catalysts; catalytic activity; chemical reactions; nitric oxide; nitrogen dioxide; temperature; tungsten oxide
Abstract:
... A WO₃/CeO₂-ZrO₂ catalyst system was discovered for selective catalytic reduction of NOₓ with NH₃; the catalyst (10 wt% WO₃ loading) showed nearly 100% NOₓ conversion in a temperature range of 200–500 °C, at a space velocity of 90 000 h⁻¹ in a simulated diesel exhaust containing 550 ppm NOₓ (NO : NO₂ feed ratio at 1.0), 10 vol% H₂O and 10 vol% CO₂; the catalyst also exhibited high temperature stabi ...
DOI:
10.1039/b717873e