Low-temperature synthesis of Mn-based mixed metal oxides with novel fluffy structures as efficient catalysts for selective reduction of nitrogen oxides by ammonia

2014 ◽  
Vol 50 (82) ◽  
pp. 12396-12399 ◽  
Author(s):  
Bo Meng ◽  
Zongbin Zhao ◽  
Yongsheng Chen ◽  
Xuzhen Wang ◽  
Yong Li ◽  
...  
Keyword(s):  
Low Temperature ◽  
Nitrogen Oxides ◽  
Metal Oxides ◽  
Selective Reduction ◽  
Mixed Metal Oxides ◽  
Low Temperature Synthesis ◽  
Temperature Synthesis ◽  
Mixed Metal

Novel Fe–Mn–Zn–Ti–O mixed-metal oxides for the low-temperature removal of H2S from gas streams in the presence of H2, CO2, and H2O

2005 ◽  
Vol 236 (2) ◽  
pp. 205-220 ◽  
Author(s):  
K POLYCHRONOPOULOU ◽  
F CABELLOGALISTEO ◽  
M LOPEZGRANADOS ◽  
J FIERRO ◽  
T BAKAS ◽  
...  
Keyword(s):  
Low Temperature ◽  
Metal Oxides ◽  
Mixed Metal Oxides ◽  
Mixed Metal ◽  
Gas Streams

scholarly journals Catalytic Oxidation of Ammonia over Cerium-Modified Copper Aluminium Zinc Mixed Oxides

Materials ◽  
2021 ◽  
Vol 14 (21) ◽  
pp. 6581
Author(s):  
Sylwia Górecka ◽  
Kateřina Pacultová ◽  
Dagmar Fridrichová ◽  
Kamil Górecki ◽  
Tereza Bílková ◽  
...  
Keyword(s):  
Low Temperature ◽  
Metal Oxides ◽  
Catalytic Oxidation ◽  
Catalytic Efficiency ◽  
Composition Analysis ◽  
High Catalytic Activity ◽  
Mixed Metal Oxides ◽  
Mixed Metal ◽  
Selective Catalytic Oxidation ◽  
Oxidation Of Ammonia

Copper-containing mixed metal oxides are one of the most promising catalysts of selective catalytic oxidation of ammonia. These materials are characterized by high catalytic efficiency; however, process selectivity to dinitrogen is still an open challenge. The set of Cu-Zn-Al-O and Ce/Cu-Zn-Al-O mixed metal oxides were tested as catalysts of selective catalytic oxidation of ammonia. At the low-temperature range, from 250 °C up to 350 °C, materials show high catalytic activity and relatively high selectivity to dinitrogen. Samples with the highest Cu loading 12 and 15 mol.% of total cation content were found to be the most active materials. Additional sample modification by wet impregnation of cerium (8 wt.%) improves catalytic efficiency, especially N2 selectivity. The comparison of catalytic tests with results of physicochemical characterization allows connecting the catalysts efficiency with the form and distribution of CuO on the samples’ surface. The bulk-like well-developed phases were associated with sample activity, while the dispersed CuO phases with dinitrogen selectivity. Material characterization included phase composition analysis (X-ray powder diffraction, UV-Vis diffuse reflectance spectroscopy), determination of textural properties (low-temperature N2 sorption, scanning electron microscopy) and sample reducibility analysis (H2 temperature-programmed reduction).

Excellent low temperature performance for total benzene oxidation over mesoporous CoMnAl composited oxides from hydrotalcites

2016 ◽  
Vol 4 (21) ◽  
pp. 8113-8122 ◽  
Author(s):  
Shengpeng Mo ◽  
Shuangde Li ◽  
Wenhui Li ◽  
Jiaqi Li ◽  
Jiayuan Chen ◽  
...  
Keyword(s):  
Low Temperature ◽  
Synergistic Effect ◽  
Metal Oxides ◽  
Catalytic Reaction ◽  
Benzene Oxidation ◽  
Mixed Metal Oxides ◽  
Redox Mechanism ◽  
Mixed Metal ◽  
Temperature Performance ◽  
Low Temperature Performance

The synergistic effect between cobalt and manganese over mesoporous CoMnAl mixed metal oxides catalysts is critical to the catalytic reaction due to a redox mechanism: Co3+–Mn3+ ↔ Co2+–Mn4+.

Cu–Zn–Al mixed metal oxides derived from hydroxycarbonate precursors for H2S removal at low temperature

2010 ◽  
Vol 256 (10) ◽  
pp. 3216-3223 ◽  
Author(s):  
Dahao Jiang ◽  
Lianghu Su ◽  
Lei Ma ◽  
Nan Yao ◽  
Xiaoliang Xu ◽  
...  
Keyword(s):  
Low Temperature ◽  
Metal Oxides ◽  
Mixed Metal Oxides ◽  
H2s Removal ◽  
Mixed Metal

The low temperature synthesis of metal oxides by novel hydrazine method

2007 ◽  
Vol 90 (3) ◽  
pp. 627-638 ◽  
Author(s):  
K. S. Rane ◽  
H. Uskaikar ◽  
R. Pednekar ◽  
R. Mhalsikar
Keyword(s):  
Low Temperature ◽  
Metal Oxides ◽  
Low Temperature Synthesis ◽  
Temperature Synthesis
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