Catalytic reduction of NOx by CO over a Ni–Ga based oxide catalyst

2015 ◽  
Vol 3 (29) ◽  
pp. 15133-15140 ◽  
Author(s):  
Shicheng Yan ◽  
Zhaochun Wu ◽  
Qian Xu ◽  
Jia Jia Wang ◽  
Jinhua Hong ◽  
...  
Keyword(s):  
Spinel Structure ◽  
Oxide Catalyst ◽  
Catalytic Reduction ◽  
Low Cost ◽  
Inverse Spinel ◽  
Specific Element ◽  
No Removal ◽  
Ligand Environment ◽  
Inverse Spinel Structure ◽  
Reduction Of Nox

A new low-cost Ni–Ga based oxide catalyst with an inverse spinel structure was developed for NO removal. Our results open up a new route for designing efficient catalysts, combining the strong gas capture properties of a specific element with high catalytic NO conversion properties, by constructing an appropriate element ligand environment.

scholarly journals Copper Aluminum Spinels Doped with Cerium as Catalysts for NO Removal

Catalysts ◽  
2020 ◽  
Vol 10 (12) ◽  
pp. 1388
Author(s):  
Anna Białas ◽  
Kamil Rugała ◽  
Cezary Czosnek ◽  
Grzegorz Mordarski ◽  
Jacek Gurgul
Keyword(s):  
Spinel Structure ◽  
Catalyst Surface ◽  
Catalytic Reduction ◽  
Atomic Ratio ◽  
Trivalent Cation ◽  
Inverse Spinel ◽  
No Removal ◽  
Redox Cycles ◽  
Mesoporous Solids ◽  
Copper Aluminum

Cu-Ce(Mn)-Al oxide catalysts to NO removal in the broad temperature range were synthesized and tested. The precursor of copper aluminium spinel was obtained with the coprecipitation method. By this method, Cu–Al spinels with various amounts of manganese and cerium were synthesized as well. These oxides crystallized in the structure of inverse spinel; however, Ce doping caused the appearance of additional CeO2 phase as determined by XRD. The samples were mesoporous solids with moderate surface area and porosity measured by low temperature sorption of nitrogen. The addition of another metal to Cu–Al spinel caused an increase of activity in selective catalytic reduction of nitrogen oxide with ammonia. The presence of manganese caused the formation of a higher amount of N2O by-product. The catalytic activity increased with the cerium concentration. For the sample with the atomic ratio Ce0.15Cu0.18, ca. 90% of NO conversion was registered between 200 and 350 °C. As examined with XPS spectroscopy, such conversion was attained due to the good dispersion of copper on the catalyst surface. This copper was placed mainly in spinel octahedral positions which enable its easier reduction. The spinel structure causes the presence of cerium as the trivalent cation important in redox cycles with the participation of copper.

Selective catalytic reduction of NOx with NH3 over Mn-Ce mixed oxide catalyst at low temperatures

2013 ◽  
Vol 216 ◽  
pp. 76-81 ◽  
Author(s):  
Zhiming Liu ◽  
Yang Yi ◽  
Shaoxuan Zhang ◽  
Tianle Zhu ◽  
Junzhi Zhu ◽  
...  
Keyword(s):  
Selective Catalytic Reduction ◽  
Mixed Oxide ◽  
Low Temperatures ◽  
Oxide Catalyst ◽  
Catalytic Reduction ◽  
Mixed Oxide Catalyst ◽  
Reduction Of Nox

Some chlorides with the inverse spinel structure

1975 ◽  
Vol 31 (10) ◽  
pp. 2549-2550 ◽  
Author(s):  
C. J. J. van Loon ◽  
J. de Jong
Keyword(s):  
Spinel Structure ◽  
Inverse Spinel ◽  
Inverse Spinel Structure

Novel cerium–tungsten mixed oxide catalyst for the selective catalytic reduction of NOx with NH3

2011 ◽  
Vol 47 (28) ◽  
pp. 8046 ◽  
Author(s):  
Wenpo Shan ◽  
Fudong Liu ◽  
Hong He ◽  
Xiaoyan Shi ◽  
Changbin Zhang
Keyword(s):  
Selective Catalytic Reduction ◽  
Mixed Oxide ◽  
Oxide Catalyst ◽  
Catalytic Reduction ◽  
Mixed Oxide Catalyst ◽  
Reduction Of Nox

The Effect of the Fe2+B/Fe3+B Ratio on Electric Conductivity and Corrosion Resistance of Anodes

2017 ◽  
Vol 896 ◽  
pp. 72-77
Author(s):  
Han Bing He ◽  
Yuan Wang ◽  
Pei Yu Huang ◽  
Xu Peng Niu
Keyword(s):  
Electrical Conductivity ◽  
Corrosion Resistance ◽  
Electric Conductivity ◽  
Spinel Structure ◽  
Experimental Results ◽  
Trivalent Iron ◽  
Iron Ion ◽  
Inverse Spinel ◽  
Inverse Spinel Structure

The effect of the Fe2+B/Fe3+B ratio (the ratio of divalent and trivalent iron ion in B position of the inverse spinel structure) in cermets on the electric conductivity and corrosion resistance of anodes was investigated. The experimental results showed that both the electrical conductivity and corrosion resistance are proportional to the Fe2+B/Fe3+B ratio on the surface of anodes because FeAl2O4 and NiAl2O4 are produced on the surface of the anode and Fe3+ in the NiFe2O4 is corroded preferentially during electrolysis.

Synthesis and Luminescence Properties of Non-Doped Long Persistent Phosphors : Mg2SnO4

2009 ◽  
Vol 421-422 ◽  
pp. 352-355 ◽  
Author(s):  
Akiko Torisaka ◽  
Hiroaki Kaneko ◽  
Kentaro Nomizu ◽  
Sho Abe ◽  
Tadashi Ishigaki ◽  
...  
Keyword(s):  
Solid State ◽  
Solid State Reaction ◽  
Spinel Structure ◽  
Single Phase ◽  
Broad Band ◽  
Photoluminescence Intensity ◽  
Inverse Spinel ◽  
Inverse Spinel Structure ◽  
Broad Band Emission ◽  
Band Emission

A white long persistence phosphor was synthesized in a single-phase of Mg2SnO4 which was synthesized by a solid-state reaction. This phosphor crystallized in an inverse spinel structure and showed a broad-band emission from 350nm to 700nm. The afterglow was observed upon the excitation by 254nm. A Li-doped Mg2SnO4 sample showed a higher photoluminescence intensity and a longer lifetime than the non-doped one.

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