Effects of CSP Support Particle Size on the Performance of Larger Diameter Liquid Partition Columns

1972 ◽  
Vol 10 (8) ◽  
pp. 481-486 ◽  
Author(s):  
H. C. Beachell ◽  
J. J. DeStefano
Keyword(s):  
Particle Size ◽  
Support Particle

scholarly journals Effect of initial support particle size of MnOx/TiO2 catalysts in the selective catalytic reduction of NO with NH3

RSC Advances ◽  
2019 ◽  
Vol 9 (9) ◽  
pp. 4682-4692 ◽  
Author(s):  
Yang Yang ◽  
Zhun Hu ◽  
Rongli Mi ◽  
Dan Li ◽  
Xiang Yong ◽  
...  
Keyword(s):  
Particle Size ◽  
Selective Catalytic Reduction ◽  
Catalytic Reduction ◽  
Reduction Of No ◽  
Support Particle ◽  
Initial Support

Support particle size could influence the surface Mn4+/Mn ratio of catalysts, promoting the reactivity of bridge nitrate, therefore enhancing SCR performance.

Effects of Support, Particle Size, and Process Parameters on Co3O4Catalyzed H2O Oxidation Mediated by the [Ru(bpy)3]2+Persulfate System

ChemCatChem ◽  
2013 ◽  
Vol 5 (2) ◽  
pp. 550-556 ◽  
Author(s):  
Chieh-Chao Yang ◽  
Tamara M. Eggenhuisen ◽  
Mariska Wolters ◽  
Anil Agiral ◽  
Heinz Frei ◽  
...  
Keyword(s):  
Particle Size ◽  
Process Parameters ◽  
Support Particle

Effect of Support Particle Size in Steam Reforming of Ethanol over Co/CeO2 Catalysts

ACS Catalysis ◽  
2012 ◽  
Vol 2 (11) ◽  
pp. 2335-2348 ◽  
Author(s):  
I. Ilgaz Soykal ◽  
Hyuntae Sohn ◽  
Umit S. Ozkan
Keyword(s):  
Particle Size ◽  
Steam Reforming ◽  
Steam Reforming Of Ethanol ◽  
Support Particle ◽  
Effect Of Support

Influence of the catalyst drying process and catalyst support particle size on the carbon nanotubes produced by CCVD

2008 ◽  
Vol 245 (10) ◽  
pp. 1915-1918 ◽  
Author(s):  
Marijana Mionic’︁ ◽  
Duncan T. L. Alexander ◽  
László Forró ◽  
Arnaud Magrez
Keyword(s):  
Carbon Nanotubes ◽  
Particle Size ◽  
Catalyst Support ◽  
Drying Process ◽  
Support Particle

Steering the Selectivity in CO2 Reduction on Highly Active Ru/TiO2 Catalysts: Support Particle Size Effects

2021 ◽  
Author(s):  
Ali M. Abdel-Mageed ◽  
Klara Wiese ◽  
Ashlee Hauble ◽  
Joachim Bansmann ◽  
Jabor Rabeah ◽  
...  
Keyword(s):  
Particle Size ◽  
Size Effects ◽  
Co2 Reduction ◽  
Particle Size Effects ◽  
Highly Active ◽  
Support Particle

Microstructural characterization of laser-melted/roller-quenched dicalcium silicate

1988 ◽  
Vol 46 ◽  
pp. 582-583
Author(s):  
C. J. Chan ◽  
K. R. Venkatachari ◽  
W. M. Kriven ◽  
J. F. Young
Keyword(s):  
Particle Size ◽  
Raw Materials ◽  
Shape Change ◽  
Microstructural Characterization ◽  
Particle Size Effect ◽  
Dicalcium Silicate ◽  
Laser Melting ◽  
Uniform Size ◽  
Cell Shape Change ◽  
Wide Range

Dicalcium silicate (Ca2SiO4) is a major component of Portland cement. It has also been investigated as a potential transformation toughener alternative to zirconia. It has five polymorphs: α, α'H, α'L, β and γ. Of interest is the β-to-γ transformation on cooling at about 490°C. This transformation, accompanied by a 12% volume increase and a 4.6° unit cell shape change, is analogous to the tetragonal-to-monoclinic transformation in zirconia. Due to the processing methods used, previous studies into the particle size effect were limited by a wide range of particle size distribution. In an attempt to obtain a more uniform size, a fast quench rate involving a laser-melting/roller-quenching technique was investigated.The laser-melting/roller-quenching experiment used precompacted bars of stoichiometric γ-Ca2SiO4 powder, which were synthesized from AR grade CaCO3 and SiO2xH2O. The raw materials were mixed by conventional ceramic processing techniques, and sintered at 1450°C. The dusted γ-Ca2SiO4 powder was uniaxially pressed into 0.4 cm x 0.4 cm x 4 cm bars under 34 MPa and cold isostatically pressed under 172 MPa. The γ-Ca2SiO4 bars were melted by a 10 KW-CO2 laser.

Analytical Electron Microscopy study of two vehicle-aged automotive exhaust catalysts having dissimilar activities

1989 ◽  
Vol 47 ◽  
pp. 272-273
Author(s):  
Sooho Kim ◽  
M. J. D’Aniello
Keyword(s):  
Electron Microscopy ◽  
Particle Size ◽  
Noble Metal ◽  
Catalyst Deactivation ◽  
Analytical Electron Microscopy ◽  
Microscopy Study ◽  
Metal Particles ◽  
Automotive Exhaust ◽  
Exhaust Catalysts ◽  
Analytical Electron

Automotive catalysts generally lose-agtivity during vehicle operation due to several well-known deactivation mechanisms. To gain a more fundamental understanding of catalyst deactivation, the microscopic details of fresh and vehicle-aged commercial pelleted automotive exhaust catalysts containing Pt, Pd and Rh were studied by employing Analytical Electron Microscopy (AEM). Two different vehicle-aged samples containing similar poison levels but having different catalytic activities (denoted better and poorer) were selected for this study.The general microstructure of the supports and the noble metal particles of the two catalysts looks similar; the noble metal particles were generally found to be spherical and often faceted. However, the average noble metal particle size on the poorer catalyst (21 nm) was larger than that on the better catalyst (16 nm). These sizes represent a significant increase over that found on the fresh catalyst (8 nm). The activity of these catalysts decreases as the observed particle size increases.

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