scholarly journals Transformation of Discrete Amorphous Aluminosilicate Nanoparticles into Nanosized Zeolites

2020 ◽  
pp. 2000634 ◽  
Author(s):  
Hailing Guo ◽  
Lei Zhao ◽  
Charlotte Martineau‐Corcos ◽  
Franck Fayon ◽  
Jasmine Viger‐Gravel ◽  
...  
Keyword(s):  
Amorphous Aluminosilicate ◽  
Nanosized Zeolites

Carbon Nanotube Templated Growth of the Nano-Crystalline NaY Zeolite

2011 ◽  
Vol 194-196 ◽  
pp. 594-597
Author(s):  
Ke Tang ◽  
Xin Hong ◽  
Jin Gang Qi
Keyword(s):  
Structural Characteristics ◽  
Internal Diameter ◽  
X Ray Diffraction ◽  
Nay Zeolite ◽  
Nano Crystalline ◽  
Transmission Electron ◽  
Ir Transmission ◽  
Ft Ir ◽  
Nay Zeolites ◽  
Nanosized Zeolites

FAU-type(NaY) zeolites nanocrystals have been synthesized through crystallization of gel in mesoporous system of carbon nanotubes(CNTS) with a internal diameter of 20~30 nm. Investigation by using X-ray diffraction (XRD), Fourier transform infrared (FT-IR), transmission electron microscope (TEM) shows that the nanocrystals possess the typical nanosized zeolites structural characteristics which is different from those of microsized zeolites.

Hard X-ray nanotomography of amorphous aluminosilicate cements

2011 ◽  
Vol 65 (4) ◽  
pp. 316-319 ◽  
Author(s):  
John L. Provis ◽  
Volker Rose ◽  
Robert P. Winarski ◽  
Jannie S.J. van Deventer
Keyword(s):  
X Ray ◽  
Amorphous Aluminosilicate

Study on the Suitability of Volcanic Amorphous Aluminosilicate Rocks (Perlite) for the Synthesis of Geopolymer-Based Concrete

2013 ◽  
pp. 34-53 ◽  
Author(s):  
M. Taxiarchou ◽  
D. Panias ◽  
Ch. Panagiotopoulou ◽  
A. Karalis ◽  
C. Dedeloudis
Keyword(s):  
Amorphous Aluminosilicate

Near-IR emission of Nd(III) encaged in nanosized zeolites

2004 ◽  
Vol 30 (2) ◽  
pp. 191-205 ◽  
Author(s):  
Munenori Ryo ◽  
Yuji Wada ◽  
Tatsuya Okubo ◽  
Shozo Yanagida
Keyword(s):  
Near Ir ◽  
Ir Emission ◽  
Nanosized Zeolites

scholarly journals Effect of Additives on the Activity of Nickel–Tungsten Sulfide Hydroconversion Catalysts Prepared In Situ from Oil-Soluble Precursors

Catalysts ◽  
2018 ◽  
Vol 8 (12) ◽  
pp. 644 ◽  
Author(s):  
Mariia Kniazeva ◽  
Anton Maximov
Keyword(s):  
Zeolite Y ◽  
Acid Sites ◽  
System Component ◽  
Gas Oil ◽  
Tungsten Sulfide ◽  
Silica Alumina ◽  
Acidic Component ◽  
Amorphous Aluminosilicate ◽  
Nickel Tungsten

The nickel–tungsten sulfide catalysts for the hydroconversion of hydrocarbons were prepared from oil-soluble nickel and tungsten precursor compounds in situ with the use of silica, alumina, titania, zeolite Y, and amorphous aluminosilicate as additives in a vacuum gas oil medium. It was found that the catalytic activity in hydrocracking depends on the concentration of acid sites in the resulting catalyst. With the use of oxide additives, the dispersion and the promoter ratio of the in situ formed sulfide particles increased in the order SiO2–Al2O3–TiO2. It was noted that the promoter ratio of sulfide particles obtained with the use of aluminosilicate additives depended on their porous structure peculiarities. The use of titanium dioxide as a catalytic system component made it possible to reach high activity in hydrocracking, hydrodearomatization, and hydrodesulfurization, which was comparable to that of a system based on zeolite Y, a highly acidic component.

scholarly journals Mechanical Properties of Fibre Reinforced Geopolymer Composites Exposed to Operating Fluids

2018 ◽  
Vol 278 ◽  
pp. 82-88
Author(s):  
Robin Hron ◽  
Martin Kadlec ◽  
František Martaus
Keyword(s):  
Shear Strength ◽  
Temperature Stability ◽  
High Temperature Stability ◽  
Plane Shear ◽  
Wet Condition ◽  
Amorphous Aluminosilicate ◽  
Interlaminar Shear ◽  
Cost Efficient ◽  
Oil Jet ◽  
Geopolymer Composites

Geopolymers are amorphous aluminosilicate materials which combine low temperature, polymer-like processing with high temperature stability and fire resistibility without toxic smoke generation. For larger expansion of geopolymer composites in aircraft industry, it is necessary to know how it behaves in contact with operating fluids. The specimens were divided into groups exposed to fuel, hydraulic oil, jet oil, and salt mist. Hot/Wet condition until saturation was also applied for one group. Mechanical testing was performed by means of tension, compression, in-plane shear, flexion and interlaminar shear on both reference non-treated and exposed specimens. The largest decrease in all measured strength values was caused by the salt mist. As the most significant, in-plane shear strength was decreased by 85 % by this environment. Operating fluids and hot/wet conditions decreased the shear strength approx. by 15 %. Geopolymer composites are an interesting alternative to existing polymeric and ceramic matrix materials and offers high potential for cost-efficient applications dealing with temperatures up to 1 200°C.

Dealumination of Nanosized Zeolites Y

2019 ◽  
Vol 59 (5) ◽  
pp. 540-545
Author(s):  
A. V. Yakimov ◽  
D. S. Zasukhin ◽  
V. A. Vorobkalo ◽  
O. A. Ponomareva ◽  
E. E. Knyazeva ◽  
...  
Keyword(s):  
Nanosized Zeolites
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