Ultrafine PdOx nanoparticles on spinel oxides by galvanic displacement for catalytic combustion of methane

2019 ◽  
Vol 9 (22) ◽  
pp. 6404-6414 ◽  
Author(s):  
Zeshu Zhang ◽  
Xuefeng Hu ◽  
Yibo Zhang ◽  
Liwei Sun ◽  
Heyuan Tian ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Catalytic Combustion ◽  
Methane Combustion ◽  
Galvanic Displacement ◽  
Spinel Oxides ◽  
Catalytic Combustion Of Methane

The excellent catalytic activity of methane combustion over the Pd/NiCo2O4 is attributed to ultrafine Pd nanopariticles and a tight Pd-spinel interface obtained by galvanic displacement.

scholarly journals Catalytic Combustion of Low Concentration Methane over Catalysts Prepared from Co/Mg-Mn Layered Double Hydroxides

2014 ◽  
Vol 2014 ◽  
pp. 1-6 ◽  
Author(s):  
Hongfeng Liu ◽  
Xingrui Fu ◽  
Xiaole Weng ◽  
Yue Liu ◽  
Haiqiang Wang ◽  
...  
Keyword(s):  
Thermal Decomposition ◽  
Catalytic Activity ◽  
Layered Double Hydroxides ◽  
Catalytic Combustion ◽  
Mixed Oxides ◽  
Oxygen Mobility ◽  
Catalytic Combustion Of Methane ◽  
Redox Ability ◽  
Double Hydroxides ◽  
Mn Oxides

A series of Co/Mg-Mn mixed oxides were synthesized through thermal decomposition of layered double hydroxides (LDHs) precursors. The resulted catalysts were then subjected for catalytic combustion of methane. Experimental results revealed that the Co4.5Mg1.5Mn2LDO catalyst possessed the best performance with theT90=485°C. After being analyzed via XRD, BET-BJH, SEM, H2-TPR, and XPS techniques, it was observed that the addition of cobalt had significantly improved the redox ability of the catalysts whilst certain amount of magnesium was essential to guarantee the catalytic activity. The presence of Mg was helpful to enhance the oxygen mobility and, meanwhile, improved the dispersion of Co and Mn oxides, preventing the surface area loss after calcination.

A Ceramic-Membrane-Based Methane Combustion Reactor With Tailored Function of Simultaneous Separation of Carbon Dioxide From Nitrogen

2014 ◽  
Author(s):  
Ryan Falkenstein-Smith ◽  
Kang Wang ◽  
Pingying Zeng ◽  
Jeongmin Ahn
Keyword(s):  
Membrane Reactor ◽  
Catalytic Combustion ◽  
Ceramic Membrane ◽  
Methane Combustion ◽  
Pure Oxygen ◽  
Conversion Rates ◽  
Dry Pressing ◽  
Catalytic Combustion Of Methane ◽  
Combustion Processes ◽  
Combustion Reactor

Today, industry has become more dependent on natural gases and combustion processes, creating a tremendous pressure to reduce their emissions. Although the current methods such as chemical looping combustion (CLC) and pure oxygen combustion have several advantages, there are still many limitations. A ceramic membrane based methane combustion reactor is an environmentally friendly technique for heat and power generation. This work investigates the performance of a perovskite-type SrSc0.1Co0.9O3-δ (SSC) membrane reactor for the catalytic combustion of methane. For this purpose, the mixed ionic and electronic conducting SSC oxygen-permeable planar membrane was prepared by a dry-pressing technique, and the SSC powder catalyst was spray coated on the permeation side of the membrane. Then, the prepared SSC membrane with the catalyst was used to perform the catalytic combustion of methane. The oxygen permeability of the membrane reactor was studied. Also, the methane conversion rates and CO2 selectivity at various test conditions were reported.

Catalytic Combustion of Methane Over Metal Oxide Catalysts

1998 ◽  
Vol 549 ◽  
Author(s):  
Koichi Eguchi ◽  
Hiroyuki Takahara ◽  
Hiroshi Inoue ◽  
Koshi Sekizawa
Keyword(s):  
Catalytic Activity ◽  
Catalytic Combustion ◽  
Ionic Radius ◽  
Structural Effect ◽  
Mirror Plane ◽  
Cation Substitution ◽  
Redox Cycle ◽  
Ionic Radii ◽  
Catalytic Combustion Of Methane ◽  
Large Cation

AbstractCation-substituted hexaaluminate compounds, ABAl11O19-μ (A = La, Pr, Sm, and Nd; B = Cr, Mn, Fe, Co, Ni, and Cu) were investigated for application to high temperature catalytic combustion. Two series of modifications of the compounds was made by cation substitution; substitution of large cations in the mirror plane with lanthanides ions, and of transition metals for Al site in the spinel block. In a series of AMnAlllO19-μ, surface area and catalytic activity increased with an increase in ionic radius of lanthanides. La3+ is superior as the large cation in the mirror plane of the hexaaluminate to other tri-valent cations with small ionic radii. The catalytic activi- ties of LaBAl11O19-μ, were enhanced when Mn and Cu were employed as the B-site substituents. Although Mn and Cu were also effective substituents for enhancing catalytic activity in Ba-based hexaaluminate compounds, their activity was low as compared with the La-based catalysts. These results indicate that the redox cycle of transition metal in hexaaluminate lattice and cata- lytic activity appears to be affected sensitively with the electronic or structural effect of large cation in the mirror plane.

Catalytic combustion of methane over Pd/Ce–Zr oxides washcoated monolithic catalysts under oxygen lean conditions

RSC Advances ◽  
2015 ◽  
Vol 5 (124) ◽  
pp. 102147-102156 ◽  
Author(s):  
Jianhui Jin ◽  
Chuang Li ◽  
Chi-Wing Tsang ◽  
Bin Xu ◽  
Changhai Liang
Keyword(s):  
Catalytic Combustion ◽  
Methane Combustion ◽  
Good Activity ◽  
Monolithic Catalysts ◽  
Catalytic Combustion Of Methane ◽  
Monolith Catalysts ◽  
Lean Conditions

Pd/CeZr coated monolith catalysts showed good activity and stability for methane combustion under oxygen-lean conditions.

Catalytic activity of spinel oxides MgCr2O4 and CoCr2O4 for methane combustion

2014 ◽  
Vol 57 ◽  
pp. 268-273 ◽  
Author(s):  
Jianan Hu ◽  
Wenyan Zhao ◽  
Ruisheng Hu ◽  
Guiying Chang ◽  
Chun Li ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Methane Combustion ◽  
Spinel Oxides

A Ceramic-Membrane-Based Methane Combustion Reactor With Tailored Function of Simultaneous Separation of Carbon Dioxide From Nitrogen

2014 ◽  
Author(s):  
Pingying Zeng ◽  
Kang Wang ◽  
Ryan Falkenstein-Smith ◽  
Jeongmin Ahn
Keyword(s):  
Membrane Reactor ◽  
Catalytic Combustion ◽  
Ceramic Membrane ◽  
Methane Combustion ◽  
Pure Oxygen ◽  
Conversion Rates ◽  
Dry Pressing ◽  
Catalytic Combustion Of Methane ◽  
Combustion Processes ◽  
Combustion Reactor

Today, industry has become more dependent on natural gases and combustion processes, creating a tremendous pressure to reduce their emissions. Although the current methods such as chemical looping combustion (CLC) and pure oxygen combustion have several advantages, there are still many limitations. A ceramic membrane based methane combustion reactor is an environmentally friendly technique for heat and power generation. This work investigates the performance of a perovskite-type SrSc0.1Co0.9O3−δ (SSC) membrane reactor for the catalytic combustion of methane. For this purpose, the mixed ionic and electronic conducting SSC oxygen-permeable planar membrane was prepared by a dry-pressing technique, and the SSC powder catalyst was spray coated on the permeation side of the membrane. Then, the prepared SSC membrane with the catalyst was used to perform the catalytic combustion of methane. The oxygen permeability of the membrane reactor was studied. Also, the methane conversion rates and CO2 selectivity at various test conditions were reported.

Catalytic methane combustion over iron/nitrogen-doped silicon carbide

RSC Advances ◽  
2016 ◽  
Vol 6 (88) ◽  
pp. 85559-85563 ◽  
Author(s):  
Hiroyuki Koshikawa ◽  
Shuji Nakanishi ◽  
Kazuhito Hashimoto ◽  
Kazuhide Kamiya
Keyword(s):  
Silicon Carbide ◽  
Catalytic Combustion ◽  
Methane Combustion ◽  
Nitrogen Doped ◽  
Doped Silicon ◽  
Catalytic Combustion Of Methane

We report that the catalytic combustion of methane was accelerated over iron and nitrogen-modified silicon carbide.

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