Alumina-Precursor Nanoparticles Prepared by Partial Hydrolysis of AlCl3 Vapor in Tubular Flow Reactor: Effect of Hydrolysis Conditions on Particle Size Distribution

2014 ◽  
Vol 53 (25) ◽  
pp. 10372-10379 ◽  
Author(s):  
Hoey Kyung Park ◽  
Kyun Young Park ◽  
Kyeong Youl Jung
Keyword(s):  
Particle Size ◽  
Particle Size Distribution ◽  
Size Distribution ◽  
Flow Reactor ◽  
Partial Hydrolysis ◽  
Tubular Flow Reactor ◽  
Tubular Flow ◽  
Hydrolysis Conditions ◽  
Hydrolysis Of

Miniemulsion photopolymerization in a continuous tubular reactor: particle size control via membrane emulsification

2020 ◽  
Vol 11 (28) ◽  
pp. 4660-4669
Author(s):  
Nida Nauman ◽  
Neomy Zaquen ◽  
Cyrille Boyer ◽  
Per B. Zetterlund
Keyword(s):  
Particle Size ◽  
Flow Reactor ◽  
Polymeric Nanoparticles ◽  
Tubular Reactor ◽  
Miniemulsion Polymerization ◽  
Size Control ◽  
Membrane Emulsification ◽  
Particle Size Control ◽  
Tubular Flow Reactor ◽  
Tubular Flow

Synthesis of polymeric nanoparticles of adjustable size in the submicron-range 200–950 nm has been conducted via membrane emulsification combined with photoinduced miniemulsion polymerization in a continuous tubular flow reactor.

Synthesis of Titania Powder by Titanium Tetrachloride Oxidation in an Aerosol Flow Reactor

1991 ◽  
Vol 249 ◽  
Author(s):  
M. Kamal Akhtar ◽  
Yun Xiong ◽  
Sotiris E. Pratsinis
Keyword(s):  
Particle Size ◽  
Particle Size Distribution ◽  
Size Distribution ◽  
Residence Time ◽  
Titanium Tetrachloride ◽  
Flow Reactor ◽  
Geometric Standard Deviation ◽  
Process Conditions ◽  
Average Particle ◽  
Powder Size

ABSTRACTVapor phase synthesis of titania particles by oxidation of titanium tetrachloride (TiCI4) was studied in an aerosol reactor between 1200 K and 1723 K. The effect of process variables (reactor residence time, temperature, reactant concentration) on powder size and phase characteristics was investigated using the differential mobility particle sizer, scanning electron microscopy and X-ray diffraction. The morphology of the particles remained unchanged under the process conditions investigated; titania particles were primarily anatase though the rutile weight fraction increased with increase in reactor temperature. The geometric number average diameter of the particles was between 0.13 µm and 0.35 [m and the geometric standard deviation of the particle size distribution was about 1.4. The average particle size increased with increasing temperature, TiCI4 concentration and residence time. The observed changes in the particle size distribution were compared with those predicted by solving the aerosol dynamic equation by a sectional method and accounting for coagulation and first order chemical reaction.

Effekts of Temperature and Reactant Concentration on Properties of Fine TiO2 Particles Prepared by Vapor-Phase Hydrolysis of Titanium Teiraisopropoxide

1988 ◽  
Vol 121 ◽  
Author(s):  
Fikret Kirkbir ◽  
Hiroshi Komiyama
Keyword(s):  
Particle Size ◽  
Vapor Phase ◽  
Flow Reactor ◽  
Water Concentration ◽  
Particle Growth ◽  
High Water ◽  
Titanium Tetraisopropoxide ◽  
Tubular Flow Reactor ◽  
Hydrolysis Of ◽  
Vapor Phase Hydrolysis

ABSTRACTSubmicrometer-size TiO2 powders were continuously produced by vapor-phase hydrolysis of titanium tetraisopropoxide, TTIP, in a tubular-flow reactor. Particle size increased with increasing inlet TTIP concentration, and with decreasing inlet water concentration and temperature. At high water concentrations, primary particles form by instantaneous chemical reactions and particle growth occur by collision and coalescence of the particles. Brownian collision and coalescence theory could predict the experimental effect of inlet TTIP concentration on particle size. The experimental deviations occurred from the theory with increasing temperature were attributed to the changing particle properties with temperature.

scholarly journals Pengaruh Perbedaan Kondisi Hidrolisis Terhadap Hasil Isolasi Nanokristalin Selulosa Dari Bonggol Jagung

2017 ◽  
Vol 5 (1) ◽  
pp. 12-16 ◽  
Author(s):  
Endah Purwanti ◽  
Sarah Dampang
Keyword(s):  
Particle Size ◽  
Sulfuric Acid ◽  
Particle Size Distribution ◽  
Size Distribution ◽  
Molecular Hydrogen ◽  
Average Diameter ◽  
Nanocrystalline Cellulose ◽  
Diameter Range ◽  
Hydrolysis Of Cellulose ◽  
Hydrolysis Of

Cellulose is one of the largest components in corncobs. Cellulose was obtained from corncob in this research that has a yield of 19.6% of 20 grams of corncob powder. The isolated cellulose was characterized by using FTIR and SEM. Cellulose has crystalline chain and insoluble in water or organic solvents. The molecular chain of cellulose is linear and has intra- and inter-molecular hydrogen bonds. One way for cellulose to be easy in the treatment of applications, is to convert microcrystalline cellulose into nanocrystalline cellulose. Nanocrystalline cellulose can be obtained by several methods, one of them by acid hydrolysis. Hydrolysis of cellulose by using sulfuric acid produces nanocrystalline cellulose. Nanocrystalline cellulose can be characterized by using TEM and PSA analysis. CNC 60 has a particle size distribution with a diameter range of 14.3 nm - 45.0 nm and an average diameter of 17.4 nm. Whereas cellulose with CNC 90 has a smaller particle size distribution with a diameter range of 10.0 nm - 17.1 nm and an average diameter of 11.9 nm.

Effects of Particle Size Distribution on Corrosion Rate of Carbon Steel in Soil

2020 ◽  
Vol 69 (4) ◽  
pp. 102-106
Author(s):  
Shota Ohki ◽  
Shingo Mineta ◽  
Mamoru Mizunuma ◽  
Soichi Oka ◽  
Masayuki Tsuda
Keyword(s):  
Particle Size ◽  
Carbon Steel ◽  
Corrosion Rate ◽  
Particle Size Distribution ◽  
Size Distribution
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