Effect of support structure on methane combustion over PdO/ZrO2

2004 ◽  
pp. 469-474 ◽  
Author(s):  
L.-F. Yang ◽  
Y.-X. Hu ◽  
D. Jin ◽  
X.-E. He ◽  
C.-K. Shi ◽  
...  
Keyword(s):  
Methane Combustion ◽  
Support Structure ◽  
Effect Of Support

Effect of support on the apparent activity of palladium oxide in catalytic methane combustion

2020 ◽  
Vol 98 (10) ◽  
pp. 2205-2213 ◽  
Author(s):  
Massimiliano Zanoletti ◽  
François Godard ◽  
Michel Perrier
Keyword(s):  
Methane Combustion ◽  
Palladium Oxide ◽  
Effect Of Support

scholarly journals Exploring the Correlation between Subsurface Residual Stresses and Manufacturing Parameters in Laser Powder Bed Fused Ti-6Al-4V

Metals ◽  
2019 ◽  
Vol 9 (2) ◽  
pp. 261 ◽  
Author(s):  
Tatiana Mishurova ◽  
Katia Artzt ◽  
Jan Haubrich ◽  
Guillermo Requena ◽  
Giovanni Bruno
Keyword(s):  
Energy Density ◽  
Residual Stresses ◽  
Processing Parameters ◽  
Synchrotron Diffraction ◽  
Support Structure ◽  
Powder Bed ◽  
X Ray ◽  
Laser Velocity ◽  
Effect Of Support ◽  
Manufacturing Parameters

Subsurface residual stresses (RS) were investigated in Ti-6Al-4V cuboid samples by means of X-ray synchrotron diffraction. The samples were manufactured by laser powder bed fusion (LPBF) applying different processing parameters, not commonly considered in open literature, in order to assess their influence on RS state. While investigating the effect of process parameters used for the calculation of volumetric energy density (such as laser velocity, laser power and hatch distance), we observed that an increase of energy density led to a decrease of RS, although not to the same extent for every parameter variation. Additionally, the effect of support structure, sample roughness and LPBF machine effects potentially coming from Ar flow were studied. We observed no influence of support structure on subsurface RS while the orientation with respect to Ar flow showed to have an impact on RS. We conclude recommending monitoring such parameters to improve part reliability and reproducibility.

scholarly journals Alloying Effect of Silver on Zirconia Support Manipulated Palladium Catalyst for Methane Combustion

Catalysts ◽  
2020 ◽  
Vol 10 (8) ◽  
pp. 863
Author(s):  
Mengmeng Chu ◽  
Fan Cai ◽  
Xiaohong Cao ◽  
Li Xing ◽  
Lefu Yang ◽  
...  
Keyword(s):  
Oxidation Reaction ◽  
Methane Combustion ◽  
Active Phase ◽  
Alloying Effect ◽  
Redox Cycles ◽  
Transmission Electron ◽  
Different Temperatures ◽  
Zirconia Support ◽  
Effect Of Support ◽  
Alloy Catalysts

PdAg/ZrO2 alloy catalysts calcined at different temperatures were employed to elucidate the effect of support-metal interaction (SMI) on methane combustion. Combustion activity was depressed when the sample was calcined at an elevated temperature from 500 °C to 700 °C. However, calcination at 850 °C enhanced the beneficial SMI, which facilitated a more active phase for the oxidation reaction. The high-resolution transmission electron microscopy experiments show that a special micro-domain structure at the interface is formed during the reduction pretreatment. H2-TPR and O2-TPD measurements illustrate that the active phase would undergo reconstruction upon redox cycles. The active phase manipulated by the support is more suitable for combustion reaction in the course of temperature altering.

scholarly journals Gold-Iron Oxide Catalyst for CO Oxidation: Effect of Support Structure

Catalysts ◽  
2016 ◽  
Vol 6 (3) ◽  
pp. 37 ◽  
Author(s):  
Hui-Zhen Cui ◽  
Yu Guo ◽  
Xu Wang ◽  
Chun-Jiang Jia ◽  
Rui Si
Keyword(s):  
Iron Oxide ◽  
Co Oxidation ◽  
Oxide Catalyst ◽  
Support Structure ◽  
Iron Oxide Catalyst ◽  
Effect Of Support ◽  
Oxidation Effect
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