Mass transfer processes during sorption and diffusion of aromatic molecules on medium pore zeolites

2004 ◽  
pp. 2041-2048 ◽  
Author(s):  
A. Jentys ◽  
H. Tanaka ◽  
J.A. Lercher
Keyword(s):  
Mass Transfer ◽  
Aromatic Molecules ◽  
Transfer Processes ◽  
Mass Transfer Processes ◽  
And Diffusion

The Effects of Dynamic Transformation on the Formation of Pt-M (M = Ni, Fe) Nanocrystals

MRS Advances ◽  
2018 ◽  
Vol 4 (24) ◽  
pp. 1377-1382 ◽  
Author(s):  
Yiliang Luan ◽  
Can Li ◽  
Bo Zhao ◽  
Amar Kumbhar ◽  
Jun Zhang ◽  
...  
Keyword(s):  
Mass Transfer ◽  
Heat And Mass Transfer ◽  
Ramp Rate ◽  
Competition Mechanism ◽  
Transfer Processes ◽  
Mass Transfer Processes ◽  
Two Factors ◽  
Rate Of Heating ◽  
And Diffusion ◽  
Model Reactions

ABSTRACTIn the synthesis of metallic nanocrystals (NCs) using a high-temperature colloidal approach, the competition between deposition and diffusion of “free atom (or clusters)” plays an important role as it can direct the morphology of NCs during their evolution. This competition is closely associated with some dynamic conditions such as heat and mass transfer. Stirring speed and ramp rate of heating are two factors that greatly impact the heat and mass transfer processes and consequently determine the morphology of the products but rarely discussed in most synthetic protocols. Herein, we study the syntheses of Pt-M (M = Ni, Fe) NCs as model reactions, showing that a low stirring speed and high ramp rate of heating result in ununiform pod-like NCs, whereas the inverse conditions promote NCs in a uniform shape. This observation can be plausibly explained using a competition mechanism between the deposition and diffusion of the newly reduced atoms during a stage of the NC’s growth.

scholarly journals A high accurate scheme for numerical simulation of two-dimensional mass transfer processes in food engineering

2021 ◽  
Vol 60 (2) ◽  
pp. 2629-2639
Author(s):  
Yin Yang ◽  
Grzegorz Rządkowski ◽  
Atena Pasban ◽  
Emran Tohidi ◽  
Stanford Shateyi
Keyword(s):  
Numerical Simulation ◽  
Mass Transfer ◽  
Two Dimensional ◽  
Food Engineering ◽  
Transfer Processes ◽  
Mass Transfer Processes ◽  
Accurate Scheme

Mass transfer processes in KDP crystal growth from solutions

1987 ◽  
Vol 84 (3) ◽  
pp. 509-514 ◽  
Author(s):  
V.I. Bredikhin ◽  
V.P. Ershov ◽  
V.V. Korolikhin ◽  
V.N. Lizyakina ◽  
S.Yu Potapenko ◽  
...  
Keyword(s):  
Mass Transfer ◽  
Crystal Growth ◽  
Growth From Solutions ◽  
Kdp Crystal ◽  
Transfer Processes ◽  
Mass Transfer Processes
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