Influencing factors on rapid crystallization of high silica nano-sized zeolite Y without organic template under atmospheric pressure

2008 ◽  
Vol 16 (3) ◽  
pp. 299-306 ◽  
Author(s):  
Young Chang Kim ◽  
Ji Yeon Jeong ◽  
Ji Yeong Hwang ◽  
Shin Dong Kim ◽  
Wha Jung Kim
Keyword(s):  
Influencing Factors ◽  
Atmospheric Pressure ◽  
Zeolite Y ◽  
Organic Template ◽  
Rapid Crystallization ◽  
High Silica

SDA-Free Hydrothermal Synthesis of High-Silica Ultra-nanosized Zeolite Y

2017 ◽  
Vol 17 (3) ◽  
pp. 1173-1179 ◽  
Author(s):  
Maeva Borel ◽  
Mathias Dodin ◽  
T. Jean Daou ◽  
Nicolas Bats ◽  
Bogdan Harbuzaru ◽  
...  
Keyword(s):  
Hydrothermal Synthesis ◽  
Zeolite Y ◽  
High Silica ◽  
Nanosized Zeolite

scholarly journals Adsorption of Lower Alcohols from Water Solutions on High Silica Zeolites, Mesoporous MCM-41 and AlPO4-5

1997 ◽  
Vol 15 (4) ◽  
pp. 289-299 ◽  
Author(s):  
Ivar M. Dahl ◽  
Elisabeth Myhrvold ◽  
Åse Slagtern ◽  
Michael Stöcker
Keyword(s):  
Zeolite Y ◽  
Micropore Volume ◽  
Water Solutions ◽  
Alkyl Chains ◽  
Β Zeolite ◽  
High Silica ◽  
High Silica Zeolites ◽  
Hydrophobic Adsorbents ◽  
Enhanced Adsorption ◽  
Mcm 41

Two dealuminated β-zeolites, zeolite Y and MCM-22 as well as silicalite, MCM-41 and AlPO4-5 have been studied as hydrophobic adsorbents in water solutions. Dealuminated β-zeolite, MCM-22 and silicalite all adsorb alcohols from water solutions. Enhanced adsorption is obtained for alcohols with longer alkyl chains. Adsorption in the practically most interesting 10–80% range of zeolite filling may adequately be described by Langmuir isotherms. The Langmuir adsorption constants are similar for β-zeolite, MCM-22 and silicalite. This indicates that the adsorption is independent of the pore structure for the alcohols tested in this study. The surface silanol density is however important, such that a low SiOH density is required to give lipophilic properties. In line with this, dealuminated zeolite Y, as prepared here, and MCM-41 give only a poor preference for alcohols from water. For the β-zeolite, the dealumination procedure is important for retaining the micropore volume and adsorption capacity of the zeolite. AlPO4-5 shows no potential as an adsorbent for alcohols from water solutions.

scholarly journals Towards the Development of Syngas/Biomethane Electrolytic Production, Using Liquefied Biomass and Heterogeneous Catalyst

Energies ◽  
2019 ◽  
Vol 12 (19) ◽  
pp. 3787 ◽  
Author(s):  
Gonçalves ◽  
Puna ◽  
Guerra ◽  
Rodrigues ◽  
Gomes ◽  
...  
Keyword(s):  
Synthesis Gas ◽  
Atmospheric Pressure ◽  
Zeolite Y ◽  
Gaseous Mixture ◽  
Operational Parameters ◽  
Synthetic Fuels ◽  
Volumetric Concentration ◽  
2Nd Generation ◽  
Different Temperatures ◽  
Generation Biofuel

This paper presents results on the research currently being carried out with the objective of developing new electrochemistry-based processes to produce renewable synthetic fuels from liquefied biomass. In the current research line, the gas mixtures obtained from the typical electrolysis are not separated into their components but rather are introduced into a reactor together with liquefied biomass, at atmospheric pressure and different temperatures, under acidified zeolite Y catalyst, to obtain synthesis gas. This gaseous mixture has several applications, like the production of synthetic 2nd generation biofuel (e. g., biomethane, biomethanol, bio-dimethyl ether, formic acid, etc.). The behaviour of operational parameters such as biomass content, temperature and the use of different amounts of acidified zeolite HY catalyst were investigated. In the performed tests, it was found that, in addition to the synthesis gas (hydrogen, oxygen, carbon monoxide and carbon dioxide), methane was also obtained. Therefore, this research is quite promising, and the most favourable results were obtained by carrying out the biomass test at 300 °C, together with 4% of acidified zeolite Y catalyst, which gives a methane volumetric concentration equal to 35%.

Rapid crystallization of amorphous silicon utilizing a VHF plasma annealing at atmospheric pressure

2007 ◽  
Vol 37 (3) ◽  
pp. 315-322 ◽  
Author(s):  
H. Shirai ◽  
Y. Sakurai ◽  
M. Yeo ◽  
T. Kobayashi ◽  
T. Ishikawa
Keyword(s):  
Amorphous Silicon ◽  
Atmospheric Pressure ◽  
Rapid Crystallization ◽  
Plasma Annealing

Sulfonamide Antibiotics Embedded in High Silica Zeolite Y: A Combined Experimental and Theoretical Study of Host−Guest and Guest−Guest Interactions

Langmuir ◽  
2010 ◽  
Vol 26 (12) ◽  
pp. 9524-9532 ◽  
Author(s):  
Ilaria Braschi ◽  
Giorgio Gatti ◽  
Geo Paul ◽  
Carlo E. Gessa ◽  
Maurizio Cossi ◽  
...  
Keyword(s):  
Theoretical Study ◽  
Zeolite Y ◽  
Sulfonamide Antibiotics ◽  
High Silica

Atmospheric pressure chemical vapor deposition of high silica SiO2–TiO2 antireflective thin films for glass based solar panels

2013 ◽  
Vol 1 (39) ◽  
pp. 6188 ◽  
Author(s):  
Erik R. Klobukowski ◽  
Wyatt E. Tenhaeff ◽  
James W. McCamy ◽  
Caroline S. Harris ◽  
Chaitanya K. Narula
Keyword(s):  
Thin Films ◽  
Chemical Vapor Deposition ◽  
Vapor Deposition ◽  
Atmospheric Pressure ◽  
Chemical Vapor ◽  
Solar Panels ◽  
Pressure Chemical ◽  
High Silica

Rapid Crystallization of Amorphous Silicon Utilizing the Plasma Annealing at Atmospheric Pressure

2007 ◽  
Vol 989 ◽  
Author(s):  
Hajime Shirai ◽  
Yusuke Sakurai ◽  
Mina Ye ◽  
Koji Haruta ◽  
Tomohiro Kobayashi ◽  
...  
Keyword(s):  
Amorphous Silicon ◽  
Atmospheric Pressure ◽  
Defect Density ◽  
Plasma Jet ◽  
Front Surface ◽  
Translational Velocity ◽  
Rapid Crystallization ◽  
Nitrogen Impurity ◽  
Si Films ◽  
Plasma Annealing

AbstractThe rapid crystallization of amorphous silicon utilizing the rf inductive coupling thermal plasma jet of argon is demonstrated. Highly crystallized a-Si films were fabricated on th-SiO2 and textured a-Si:H:B/SnO2/glass by adjusting the translational velocity of the substrate stage. The H concentration in the films decreased from 1021 cm-3 to 1019 cm-3 with no marked increases in oxygen and nitrogen impurity concentrations and defect density. The crystallization proceeds from the bottom to front surface in terms of the volume expansion during the solidification and crystallization of liquid Si.

scholarly journals Seasonal pattern of influenza and the association with meteorological factors based on wavelet analysis in Jinan City, Eastern China, 2013–2016

PeerJ ◽  
2020 ◽  
Vol 8 ◽  
pp. e8626 ◽  
Author(s):  
Wei Su ◽  
Ti Liu ◽  
Xingyi Geng ◽  
Guoliang Yang
Keyword(s):  
Influenza Virus ◽  
Influencing Factors ◽  
Atmospheric Pressure ◽  
Meteorological Factors ◽  
Wavelet Coherence ◽  
Coherence Analysis ◽  
Climate Factors ◽  
Epidemic Season ◽  
Wavelet Coherence Analysis ◽  
Influenza Seasonality

Background Influenza is a disease under surveillance worldwide with different seasonal patterns in temperate and tropical regions. Previous studies have conducted modeling of influenza seasonality using climate variables. This study aimed to identify potential meteorological factors that are associated with influenza seasonality in Jinan, China. Methods Data from three influenza sentinel hospitals and respective climate factors (average temperature, relatively humidity (RH), absolute humidity (AH), sunshine duration, accumulated rainfall and speed of wind), from 2013 to 2016, were collected. Statistical and wavelet analyses were used to explore the epidemiological characteristics of influenza virus and its potential association with climate factors. Results The dynamic of influenza was characterized by annual cycle, with remarkable winter epidemic peaks from December to February. Spearman’s correlation and wavelet coherence analysis illuminated that temperature, AH and atmospheric pressure were main influencing factors. Multiple wavelet coherence analysis showed that temperature and atmospheric pressure might be the main influencing factors of influenza virus A(H3N2) and influenza virus B, whereas temperature and AH might best shape the seasonality of influenza virus A(H1N1)pdm09. During the epidemic season, the prevalence of influenza virus lagged behind the change of temperature by 1–8 weeks and atmospheric pressure by 0.5–3 weeks for different influenza viruses. Conclusion Climate factors were significantly associated with influenza seasonality in Jinan during the influenza epidemic season and the optional time for influenza vaccination is before November. These finding should be considered in influenza planning of control and prevention.

Sign in / Sign up

Export Citation Format

Share Document