Hexamethylenetetramine-assisted hydrothermal synthesis of efficient and stable Ni-MoCeZr-MgAl(O) catalysts for dry reforming of CH4: Effect of Ni content

Fuel ◽  
2019 ◽  
Vol 254 ◽  
pp. 115562 ◽  
Author(s):  
Xiaodong Li ◽  
Yanli Huang ◽  
Qian Zhang ◽  
Zhijun Zuo ◽  
Xiaodong Wang ◽  
...  
Keyword(s):  
Hydrothermal Synthesis ◽  
Dry Reforming ◽  
Ni Content

Effects of modifier (Gd, Sc, La) addition on the stability of low Ni content catalyst for dry reforming of model biogas

Fuel ◽  
2022 ◽  
Vol 312 ◽  
pp. 122823
Author(s):  
Quan Luu Manh Ha ◽  
Hanan Atia ◽  
Carsten Kreyenschulte ◽  
Henrik Lund ◽  
Stephan Bartling ◽  
...  
Keyword(s):  
Dry Reforming ◽  
Ni Content ◽  
La Addition ◽  
The Stability

scholarly journals Low Temperature Methanation of CO2 on High Ni Content Ni-Ce-ZrOδ Catalysts Prepared via One-Pot Hydrothermal Synthesis

Catalysts ◽  
2019 ◽  
Vol 10 (1) ◽  
pp. 32 ◽  
Author(s):  
Vissanu Meeyoo ◽  
Noppadol Panchan ◽  
Nat Phongprueksathat ◽  
Atsadang Traitangwong ◽  
Xinpeng Guo ◽  
...  
Keyword(s):  
Hydrothermal Synthesis ◽  
Low Temperature ◽  
High Surface ◽  
Oxygen Species ◽  
Co2 Conversion ◽  
One Pot ◽  
Co2 Methanation ◽  
Surface Areas ◽  
Ni Content ◽  
Methane Selectivity

Ni-Ce-Zr-Oδ catalysts were prepared via one-pot hydrothermal synthesis. It was found that Ni can be partially incorporated into the Ce-Zr lattice, increasing surface oxygen species. The catalysts possess high surface areas even at high Ni loadings. The catalyst with Ni content of 71.5 wt.% is able to activate CO2 methanation even at a low temperature (200 °C). Its CO2 conversion and methane selectivity were reported at 80% and 100%, respectively. The catalyst was stable for 48 h during the course of CO2 methanation at 300 °C. Catalysts with the addition of medium basic sites were found to have better catalytic activity for CO2 methanation.

scholarly journals Development of Highly Stable Low Ni Content Catalyst for Dry Reforming of CH 4 ‐Rich Feedstocks

ChemCatChem ◽  
2020 ◽  
Vol 12 (6) ◽  
pp. 1562-1568 ◽  
Author(s):  
Quan Luu Manh Ha ◽  
Henrik Lund ◽  
Carsten Kreyenschulte ◽  
Stephan Bartling ◽  
Hanan Atia ◽  
...  
Keyword(s):  
Dry Reforming ◽  
Ni Content

Methane dry reforming over hydrotalcite-derived Ni–Mg–Al mixed oxides: the influence of Ni content on catalytic activity, selectivity and stability

2016 ◽  
Vol 6 (17) ◽  
pp. 6705-6715 ◽  
Author(s):  
Radosław Dębek ◽  
Monika Motak ◽  
Dorota Duraczyska ◽  
Franck Launay ◽  
Maria Elena Galvez ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Mixed Oxides ◽  
Dry Reforming ◽  
Methane Dry Reforming ◽  
Ni Content

Ni-containing hydrotalcite-derived catalysts were prepared using different Ni loadings (from ca. 4 to 60 wt%) at the same MII/MIII ratio equal to 3.

An investigation on the influence of catalyst composition, calcination and reduction temperatures on Ni/MgO catalyst for dry reforming of methane

RSC Advances ◽  
2016 ◽  
Vol 6 (94) ◽  
pp. 91603-91616 ◽  
Author(s):  
Muhammad Usman ◽  
W. M. A. Wan Daud
Keyword(s):  
Catalytic Activity ◽  
Space Velocity ◽  
Dry Reforming ◽  
Dry Reforming Of Methane ◽  
Catalyst Composition ◽  
Ni Content ◽  
High Space ◽  
Very High ◽  
High Space Velocity

Catalytic activity of Ni/MgO catalyst investigated at different Ni content (20, 40 and 80 wt%), calcination (450, 600 and 800 °C) and reduction temperatures (550 and 800 °C) for dry reforming reaction at very high space velocity.

Evidence for ordered Fe3Ni

1987 ◽  
Vol 45 ◽  
pp. 216-217
Author(s):  
K.B. Reuter ◽  
D.B. Williams ◽  
J.I. Goldstein
Keyword(s):  
Experimental Data ◽  
Martensitic Transformation ◽  
Electron Diffraction ◽  
Room Temperature ◽  
Direct Evidence ◽  
Transformation Product ◽  
Iron Meteorites ◽  
X Ray ◽  
Ni Content ◽  
Temperature Transformation

In the Fe-Ni system, although ordered FeNi and ordered Ni3Fe are experimentally well established, direct evidence for ordered Fe3Ni is unconvincing. Little experimental data for Fe3Ni exists because diffusion is sluggish at temperatures below 400°C and because alloys containing less than 29 wt% Ni undergo a martensitic transformation at room temperature. Fe-Ni phases in iron meteorites were examined in this study because iron meteorites have cooled at slow rates of about 10°C/106 years, allowing phase transformations below 400°C to occur. One low temperature transformation product, called clear taenite 2 (CT2), was of particular interest because it contains less than 30 wtZ Ni and is not martensitic. Because CT2 is only a few microns in size, the structure and Ni content were determined through electron diffraction and x-ray microanalysis. A Philips EM400T operated at 120 kV, equipped with a Tracor Northern 2000 multichannel analyzer, was used.

Hydrothermal synthesis of MoS 2 nanoflowers and their capacitive property

2019 ◽  
Vol 14 (5) ◽  
pp. 493-495 ◽  
Author(s):  
Qinghua Yang ◽  
Chunni Xiao ◽  
Bingbing Chen ◽  
Lin Ma ◽  
Limei Xu
Keyword(s):  
Hydrothermal Synthesis ◽  
Capacitive Property

Hydrothermal Synthesis and Solid-State Laser Refrigeration of Ytterbium-Doped Potassium Lutetium Fluoride (KLF) Microcrystals

2020 ◽  
Author(s):  
Xiaojing Xia ◽  
Anupum Pant ◽  
Xuezhe Zhou ◽  
Elena Dobretsova ◽  
Alex Bard ◽  
...  
Keyword(s):  
Hydrothermal Synthesis ◽  
Solid State ◽  
Information Science ◽  
Point Group ◽  
Solid State Laser ◽  
Lanthanide Ions ◽  
Group Symmetry ◽  
Luminescence Spectra ◽  
Crystalline Phases ◽  
State Laser

Fluoride crystals, due to their low phonon energies, are attractive hosts of trivalent lanthanide ions for applications in upconverting phosphors, quantum information science, and solid-state laser refrigeration. In this article, we report the rapid, low-cost hydrothermal synthesis of potassium lutetium fluoride (KLF) microcrystals for applications in solid-state laser refrigeration. Four crystalline phases were synthesized, namely orthorhombic K<sub>2</sub>LuF<sub>5</sub> (Pnma), trigonal KLuF<sub>4</sub> (P3<sub>1</sub>21), orthorhombic KLu<sub>2</sub>F<sub>7</sub> (Pna2<sub>1</sub>), and cubic KLu<sub>3</sub>F<sub>10</sub> (Fm3m), with each phase exhibiting unique microcrystalline morphologies. Luminescence spectra and emission lifetimes of the four crystalline phases were characterized based on the point-group symmetry of trivalent cations. Laser refrigeration was measured by observing both the optomechanical eigenfrequencies of microcrystals on cantilevers in vacuum, and also the Brownian dynamics of optically trapped microcrystals in water. Among all four crystalline phases, the most significant cooling was observed for 10%Yb:KLuF<sub>4</sub> with cooling of 8.6 $\pm$ 2.1 K below room temperature. Reduced heating was observed with 10%Yb:K<sub>2</sub>LuF<sub>5</sub>

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