Comparison of Kinetics of Organic Reactions Carried out on Resin Beads of Different Diameters

2003 ◽  
Vol 42 (24) ◽  
pp. 5964-5967 ◽  
Author(s):  
Bing Yan ◽  
Qing Tang
Keyword(s):  
Organic Reactions ◽  
Resin Beads ◽  
Different Diameters ◽  
Kinetics Of

scholarly journals Kinetics of the Boride Layers Obtained on AISI 1018 Steel by Considering the Amount of Matter Involved

Coatings ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 259 ◽  
Author(s):  
Pablo A. Ruiz-Trabolsi ◽  
Julio Cesar Velázquez ◽  
Carlos Orozco-Álvarez ◽  
Rafael Carrera-Espinoza ◽  
Jorge A. Yescas-Hernández ◽  
...  
Keyword(s):  
Sample Size ◽  
Growth Kinetics ◽  
Duration Of Treatment ◽  
Solid Diffusion ◽  
Treatment Conditions ◽  
Wear And Corrosion ◽  
Different Diameters ◽  
Boriding Process ◽  
Kinetics Of ◽  
Cylindrical Samples

Boride layers are typically used to combat the wear and corrosion of metals. For this reason, to improve our knowledge of the boriding process, this research studied the effect of the size of the treated material on the kinetics of the growth of the boride layers obtained during a solid diffusion process. The purpose was to elucidate how the layers’ growth kinetics could be affected by the size of the samples since, as the amount of matter increases, the amount of energy necessary to make the process occur also increases. Furthermore, the level of activation energy seems to change as a function of the sample size, although it is considered an intrinsic parameter of each material. Six cylindrical samples with different diameters were exposed to the boriding process for three different exposure times (1.5, 3, and 5 h). The treatment temperatures used were 900, 950, and 1000 °C for each size and duration of treatment. The results show that the layer thickness increased not only as a function of the treatment conditions but also as a function of the sample diameter. The influence of the sample size on the growth kinetics of the boride layers is clear, because the growth rate increased even though the treatment conditions (time and temperature) remained constant.

Mixing and Segregation Processes in Turbula Blender

2000 ◽  
Vol 627 ◽  
Author(s):  
Nathalie Sommier ◽  
Patrice Porion ◽  
Pierre Evesque
Keyword(s):  
Rotation Speed ◽  
Mixing Time ◽  
Qualitative And Quantitative Analysis ◽  
Resonance Imaging ◽  
Mixing Processes ◽  
Segregation Index ◽  
Qualitative And Quantitative ◽  
Magnetic Resonance Imaging Mri ◽  
Different Diameters ◽  
Kinetics Of

ABSTRACTMagnetic Resonance Imaging (MRI) technique was used to study the mixing and segregation processes of granular materials in a sophisticated tumbling blender (Turbula® mixer) using binary mixtures of sugar beads of different diameters d. Its motion generates mixtures with complex patterns. Effects of some parameters (beads diameter ratio, rotation speed, mixing time) were checked on segregation and mixing processes. We report in this paper, a qualitative and quantitative analysis of these phenomena. A segregation index S was defined to study the homogeneity and the kinetics of the mixing/segregation processes. When the ratio of bead diameters dmax/dmin is approximately 1, mixing process is observed but segregation occurs as soon as dmax/dmin is greater than 1.1.

Study on Grinding Kinetics of a Unique Double-Sphere Grinding Media for Cassiterite-Polymetallic Sulphide Ores

2013 ◽  
Vol 457-458 ◽  
pp. 236-239
Author(s):  
Jin Peng Feng ◽  
Xia Feng ◽  
Shao Jian Ma ◽  
Jie Liu ◽  
Wei Mo ◽  
...  
Keyword(s):  
Sulfide Ores ◽  
Size Fractions ◽  
Grinding Media ◽  
Sulphide Ores ◽  
Grinding Kinetics ◽  
Different Diameters ◽  
Grinding Efficiency ◽  
Kinetics Of

The grinding kinetics are strongly affected by the grinding media size and style, in order to improve the grinding efficiency and solve the over-grinding problem of cassiterite in the process of grinding in cassiterite-polymetallic sulfide ores plant. A unique double-sphere grinding media has been designed and the grinding kinetics of this media with different diameters for grinding products of different size fractions have been investigated in this paper.

The kinetics of some organic reactions under pressure

1956 ◽  
Vol 22 ◽  
pp. 114 ◽  
Author(s):  
S. D. Hamann ◽  
D. R. Teplitzky
Keyword(s):  
Organic Reactions ◽  
Kinetics Of
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