Precursor Particle Size as the Key Parameter for Isothermal Tuning of Morphology from Nanofibers to Nanotubes in the Na2−xHxTinO2n+1System through Hydrothermal Alkali Treatment of Rutile Mineral Sand

2009 ◽  
Vol 9 (5) ◽  
pp. 2152-2158 ◽  
Author(s):  
Lidija T. Mancic ◽  
Bojan A. Marinkovic ◽  
Paula M. Jardim ◽  
Olivera B. Milosevic ◽  
Fernando Rizzo
Keyword(s):  
Particle Size ◽  
Alkali Treatment ◽  
Precursor Particle ◽  
Key Parameter

Understanding alloy structure and composition in sinter-resistant AgPd@SiO2 encapsulated catalysts and their effect on catalytic properties

2017 ◽  
Vol 41 (23) ◽  
pp. 14652-14658 ◽  
Author(s):  
Sourik Mondal ◽  
Thattarathody Rajesh ◽  
Basab B. Dhar ◽  
Markus Snellman ◽  
Junjie Li ◽  
...  
Keyword(s):  
Particle Size ◽  
Alloy Composition ◽  
Catalytic Properties ◽  
Alloy Structure ◽  
Precursor Particle ◽  
Encapsulated Catalysts ◽  
Catalytic Performances

Effects of precursor particle size, extent of alloying and alloy composition on AgPd@SiO2 catalytic performances.

scholarly journals Properties of geopolymer binders prepared from milled pond ash

2017 ◽  
Vol 67 (328) ◽  
pp. 134 ◽  
Author(s):  
J. Temuujin ◽  
A. Minjigmaa ◽  
U. Bayarzul ◽  
D. S. Kim ◽  
S-Ho Lee ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Particle Size ◽  
Alkali Treatment ◽  
Amorphous Material ◽  
Thermal Power ◽  
Leaching Tests ◽  
Power Station ◽  
Pond Ash ◽  
X Ray ◽  
Alkali Activated

Alkali-activated materials were prepared from pond ash from the Darkhan city (Mongolia) thermal power station. This ash contains about 60 wt % X-ray amorphous material in addition to quartz, mullite, hematite and magnesioferrite, and presents significant storage problems since it is accumulating in large amounts and is a hazardous waste, containing 90–100 ppm of the heavy metals As, Pb and Cr, and about 800 ppm Sr. Alkali-activated materials synthesized from the as-received pond ash achieved compressive strengths of only 3.25 MPa. Reduction of the particle size by mechanical milling for up to 30 min progressively increases the compressive strength of the resulting alkali-activated geopolymer up to 15.4 MPa. Leaching tests indicate that the combination of milling and alkali treatment does not cause the release of the hazardous heavy metals from the product, making it suitable for construction applications.

scholarly journals Volatile particles formation during PartEmis: a modelling study

2003 ◽  
Vol 3 (6) ◽  
pp. 5803-5829 ◽  
Author(s):  
X. Vancassel ◽  
A. Sorokin ◽  
P. Mirabel ◽  
A. Petzold ◽  
C. Wilson
Keyword(s):  
Particle Size ◽  
Growth Factors ◽  
Growth Factor ◽  
Soot Particle ◽  
Monodisperse Particles ◽  
Sampling System ◽  
System A ◽  
A Value ◽  
Key Parameter ◽  
Modelling Study

Abstract. A modelling study of the formation of volatile particles in a combustor exhaust has been carried out in the frame of the PartEmis European project. A kinetic model has been used in order to investigate nucleation efficiency of the H2O-H2SO4 binary mixture in the sampling system. A value for the fraction e of the fuel sulphur S(IV) converted into S(VI) has been indirectly deduced from comparisons between model results and measurements. In the present study, e ranges between roughly 2.5% and 6%, depending on the combustor settings and on the microphysical approach used. Soot particles hygroscopicity has also been investigated as their activation is a key parameter for contrail formation. Growth factors of monodisperse particles exposed to high relative humidity (95%) have been calculated and compared with experimental results. The modelling study confirms that the growth factor increases as the soot particle size decreases.

Effects of precursor particle size on the performance of LiNi0.5Co0.2Mn0.3O2 cathode material

2015 ◽  
Vol 41 (10) ◽  
pp. 15185-15192 ◽  
Author(s):  
Min Nie ◽  
Yun-Fei Xia ◽  
Zhen-Bo Wang ◽  
Fu-Da Yu ◽  
Yin Zhang ◽  
...  
Keyword(s):  
Particle Size ◽  
Cathode Material ◽  
Precursor Particle

Molecular Transport of Xylene Through Palm Pressed Fibre Filled Low Density Polyethylene: Role of Fibre Content, Alkali Treatment and Particle Size

2016 ◽  
Vol 25 (3) ◽  
pp. 544-555 ◽  
Author(s):  
C. Henry Obasi ◽  
U. Martin Obidiegwu ◽  
N. Godwin Onyeagoro ◽  
O. Innocent Arukalam ◽  
C. Genevive Onuegbu ◽  
...  
Keyword(s):  
Particle Size ◽  
Alkali Treatment ◽  
Molecular Transport ◽  
Fibre Content ◽  
Low Density Polyethylene ◽  
Low Density ◽  
Palm Pressed Fibre

Influence of precipitation conditions on precursor particle size distribution and activity of Cu/ZnO methanol synthesis catalyst

2014 ◽  
Vol 482 ◽  
pp. 237-244 ◽  
Author(s):  
Bahman Vasheghani Farahani ◽  
Farzaneh Hosseinpour Rajabi ◽  
Mohsen Bahmani ◽  
Marzieh Ghelichkhani ◽  
Saeed Sahebdelfar
Keyword(s):  
Particle Size ◽  
Particle Size Distribution ◽  
Size Distribution ◽  
Methanol Synthesis ◽  
Precursor Particle ◽  
Methanol Synthesis Catalyst

scholarly journals Volatile particles formation during PartEmis: a modelling study

2004 ◽  
Vol 4 (2) ◽  
pp. 439-447 ◽  
Author(s):  
X. Vancassel ◽  
A. Sorokin ◽  
P. Mirabel ◽  
A. Petzold ◽  
C. Wilson
Keyword(s):  
Particle Size ◽  
Growth Factors ◽  
Soot Particle ◽  
Monodisperse Particles ◽  
Sampling System ◽  
System A ◽  
A Value ◽  
Wall Losses ◽  
Key Parameter ◽  
Modelling Study

Abstract. A modelling study of the formation of volatile particles in a combustor exhaust has been carried out in the frame of the PartEmis European project. A kinetic model has been used in order to investigate nucleation efficiency of the H2O-H2SO4 binary mixture in the sampling system. A value for the fraction of the fuel sulphur S(IV) converted into S(VI) has been indirectly deduced from comparisons between model results and measurements. In the present study, ranges between roughly 2.5% and 6%, depending on the combustor settings and on the value assumed for the parameter describing sulphuric acid wall losses. Soot particles hygroscopicity has also been investigated as their activation is a key parameter for contrail formation. Growth factors of monodisperse particles exposed to high relative humidity (95%) have been calculated and compared with experimental results. The modelling study confirms that the growth factor increases as the soot particle size decreases.

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