A study of iron modification of the alumina-supported Pt/SO4/ZrO2 catalysts for isomerization of n-hexane

2019 ◽  
Author(s):  
L. I. Bikmetova ◽  
K. V. Kazantsev ◽  
E. V. Zatolokina ◽  
M. D. Smolikov ◽  
A. S. Belyi
Keyword(s):  
Iron Modification

scholarly journals The Catalytic Oxidation of Formaldehyde by FeOx-MnO2-CeO2 Catalyst: Effect of Iron Modification

Catalysts ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 555
Author(s):  
Yaxin Dong ◽  
Chenguang Su ◽  
Kai Liu ◽  
Haomeng Wang ◽  
Zheng Zheng ◽  
...  
Keyword(s):  
Low Temperatures ◽  
Oxygen Vacancies ◽  
Catalytic Performance ◽  
Active Oxygen ◽  
Molar Ratio ◽  
N2 Adsorption ◽  
Structure Activity ◽  
Iron Modification ◽  
Surface Active ◽  
Catalyst Effect

A series of FeOx-MnO2-CeO2 catalysts were synthesized by the surfactant-templated coprecipitation method and applied for HCHO removal. The influence of Fe/Mn/Ce molar ratio on the catalytic performance was investigated, and the FeOx-MnO2-CeO2 catalyst exhibited excellent catalytic activity, with complete HCHO conversion at low temperatures (40 °C) when the molar ratio of Fe/Mn/Ce was 2/5/5. The catalysts were characterized by N2 adsorption and desorption, XRD, H2-TPR, O2-TPD and XPS techniques to illustrate their structure–activity relationships. The result revealed that the introduction of FeOx into MnO2-CeO2 formed a strong interaction between FeOx-MnO2-CeO2, which facilitated the improved dispersion of MnO2-CeO2, subsequently increasing the surface area and aiding pore development. This promotion effect of Fe enhanced the reducibility and produced abundant surface-active oxygen. In addition, a great number of Oα is beneficial to the intermediate decomposition, whereas the existence of Ce3+ favors the formation of oxygen vacancies on the surface of the catalyst, all of which contributed to HCHO oxidation at low temperatures.

scholarly journals Effect of Iron Modification on the Adsorption Property of Nitrogen Monoxide on Zeolite Y

1998 ◽  
Vol 106 (1229) ◽  
pp. 79-83 ◽  
Author(s):  
Yukichi SASAKI ◽  
Toshiyuki SUZUKI ◽  
Isao TATEYAMA ◽  
Yukari ISIKAWA ◽  
Akira SAJI ◽  
...  
Keyword(s):  
Zeolite Y ◽  
Adsorption Property ◽  
Nitrogen Monoxide ◽  
Iron Modification

Electromagnetic Performance due to Tooth-tip Design in Fractional-slot PM Brushless Machines

2015 ◽  
Vol 6 (4) ◽  
pp. 860
Author(s):  
Mohd Luqman Mohd Jamil ◽  
Zulfikri Zaki Zolkapli ◽  
Auzani Jidin ◽  
Raja Nor Firdaus Raja Othman ◽  
Tole Sutikno
Keyword(s):  
Double Layer ◽  
Great Influence ◽  
Single Layer ◽  
Torque Ripple ◽  
Element Analysis ◽  
Cogging Torque ◽  
Torque Density ◽  
Iron Modification ◽  
Winding Machine ◽  
Electromagnetic Performance

Permanent Magnet (PM) machines are favorable as an alternative to other machine topologies due to simpler construction and high torque density. However, it may result hight torque ripple due to an influence of cogging torque and electronic commutation. In this paper, comparisons of phase back-emf, static torque and cogging torque due to influence of tooth-tip asymmetry in 12-slot/10-pole double-layer and 12-slot/10-pole single layer winding machines are carried out using 2D Finite-Element Analysis. At rated condition, the stator asymmetry has great influence on the torque performance as there is significant reduction of torque ripple in 12-slot/10-pole mahine equipped with single layer winding than one equipped with double layer winding machine. It si confirmed that an optimum torque performance is desirable via stator iron modification in PM machines.

scholarly journals INTRAFORM CAST-IRON MODIFICATION. IMPACT STUDIES OF SILICON CARBIDE MODIFIERS ON CRYTALLIZATION OF GREY IRON. REPORT 1

2015 ◽  
Vol 57 (6) ◽  
pp. 20
Author(s):  
V. A. Poluboyarov ◽  
Z. A. Korotaeva ◽  
A. A. Zhdanok ◽  
V. A. Kuznetzov ◽  
N. V. Stepanova
Keyword(s):  
Silicon Carbide ◽  
Cast Iron ◽  
Impact Studies ◽  
Iron Modification ◽  
Grey Iron

Iron Modification of Biochar Developed from Tectona grandis Linn. F. for Adsorptive Removal of Tetracycline from Aqueous Solution

2021 ◽  
Vol 11 (3) ◽  
pp. 360-375
Author(s):  
Anushree Srivastava ◽  
Hemen Dave ◽  
Shivesh Kumar Azad ◽  
Madhu Kumari ◽  
Sharad Karwal ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Tectona Grandis ◽  
Adsorptive Removal ◽  
Iron Modification

scholarly journals Mechanical Behaviour of Nanostructured Iron Fabricated by Severe Plastic Deformation under Diffusion Flow of Nitrogen

2006 ◽  
Vol 503-504 ◽  
pp. 645-650 ◽  
Author(s):  
A.I. Yurkova ◽  
A.V. Byakova ◽  
A.V. Belots'ky ◽  
Yu.V. Milman ◽  
Sergey N. Dub
Keyword(s):  
Grain Size ◽  
Young’S Modulus ◽  
Mechanical Behaviour ◽  
Young's Modulus ◽  
Grain Structure ◽  
Triple Junctions ◽  
Fine Grained ◽  
Friction Treatment ◽  
Iron Modification ◽  
Nanocrystalline Iron

Specific features of mechanical behaviour of ultra fine grained iron subjected to friction treatment with nitriding (FN) were clarified by comparison with that induced by friction treatment (FT) with air. Mechanical parameters such as Young’s modulus, nanohardness, and plasticity characteristic δA were found to be of high sensitive both to the scale of grain structure and to iron modification by nitrogen. Young’s modulus tends to decrease and Hall-Petch low fails to describe correlation between grain structure and hardness for submicro-grained and nanocrystalline iron. Hall-Petch coefficient, ky, decreases as grain size decreases within submicro-grained and, then, nano grained sections and it takes even negative value in nano grained section modified by nitrogen. Parameter δA is found to be dependent on combination of hardness and Young’s modulus, resulting in its variation with decreasing the grain size. The presence of secondary nanocrystalline Fe4N phase fundamentally changes mechanical behaviour of nanocrystalline iron, leading to strengthening the grain boundaries and triple junctions.

Regulating the electronic structure of ultrathin Ni-based chalcogenide nanosheets through iron modification towards high electrocatalytic activities

2021 ◽  
Vol 416 ◽  
pp. 129098
Author(s):  
Zhiyu Shao ◽  
Ruobing Liu ◽  
Hui Xue ◽  
Jing Sun ◽  
Niankun Guo ◽  
...  
Keyword(s):  
Electronic Structure ◽  
Iron Modification

Promotional effect of iron modification on the catalytic properties of Mn-Fe/ZSM-5 catalysts in the Fast SCR reaction

2018 ◽  
Vol 169 ◽  
pp. 112-121 ◽  
Author(s):  
Tao Wang ◽  
Zhentian Wan ◽  
Xiaochu Yang ◽  
Xinyu Zhang ◽  
Xiaoxuan Niu ◽  
...  
Keyword(s):  
Catalytic Properties ◽  
Promotional Effect ◽  
Iron Modification ◽  
Fast Scr

scholarly journals Iron-Modification of Pyroclastic Material from PCCVC Eruption (Chile): Characterization and Application to Remove Arsenic from Groundwater

2015 ◽  
Vol 06 (10) ◽  
pp. 1124-1133 ◽  
Author(s):  
María J. González ◽  
Lia Botto ◽  
María E. Canafoglia ◽  
Laura Coccaro ◽  
Edgardo Soto
Keyword(s):  
Pyroclastic Material ◽  
Iron Modification

Iron modification in the mold using foam-ceramic filters

Refractories ◽  
1991 ◽  
Vol 32 (3-4) ◽  
pp. 132-133
Author(s):  
L. G. Ivanchenkova
Keyword(s):  
Ceramic Filters ◽  
Foam Ceramic ◽  
Iron Modification
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