Modeling the mass-transport processes in the sorption of metal ions onto bone char

2001 ◽  
Author(s):  
Chun Wai Cheung
Keyword(s):  
Mass Transport ◽  
Metal Ions ◽  
Transport Processes ◽  
Bone Char

Mass Transport Model for the Fixed Bed Sorption of Metal Ions on Bone Char

2003 ◽  
Vol 42 (14) ◽  
pp. 3458-3469 ◽  
Author(s):  
Danny C. K. Ko ◽  
John F. Porter ◽  
Gordon McKay
Keyword(s):  
Mass Transport ◽  
Metal Ions ◽  
Transport Model ◽  
Fixed Bed ◽  
Bone Char ◽  
Mass Transport Model

Multicomponent mass transport model for the sorption of metal ions on bone char

AIChE Journal ◽  
2004 ◽  
Vol 50 (9) ◽  
pp. 2130-2141 ◽  
Author(s):  
Danny C. K. Ko ◽  
John F. Porter ◽  
Gordon McKay
Keyword(s):  
Mass Transport ◽  
Metal Ions ◽  
Transport Model ◽  
Bone Char ◽  
Mass Transport Model

Revisiting the passivation of stainless steels and other passive CRAs

2018 ◽  
Vol 106 (1) ◽  
pp. 107 ◽  
Author(s):  
Jean- Louis Crolet
Keyword(s):  
Electrical Conductivity ◽  
Metal Ions ◽  
Base Metal ◽  
Stainless Steels ◽  
Electronic Conductivity ◽  
Transport Processes ◽  
General Knowledge ◽  
Inorganic Polymers ◽  
Faraday Cage

All that was said so far about passivity and passivation was indeed based on electrochemical prejudgments, and all based on unverified postulates. However, due the authors’ fame and for lack of anything better, the great many contradictions were carefully ignored. However, when resuming from raw experimental facts and the present general knowledge, it now appears that passivation always begins by the precipitation of a metallic hydroxide gel. Therefore, all the protectiveness mechanisms already known for porous corrosion layers apply, so that this outstanding protectiveness is indeed governed by the chemistry of transport processes throughout the entrapped water. For Al type passivation, the base metal ions only have deep and complete electronic shells, which precludes any electronic conductivity. Then protectiveness can only arise from gel thickening and densification. For Fe type passivation, an incomplete shell of superficial 3d electrons allows an early metallic or semimetallic conductivity in the gel skeleton, at the onset of the very first perfectly ordered inorganic polymers (- MII-O-MIII-O-)n. Then all depends on the acquisition, maintenance or loss of a sufficient electrical conductivity in this Faraday cage. But for both types of passive layers, all the known features can be explained by the chemistry of transport processes, with neither exception nor contradiction.

Characterization of step-edge barrier crossing of para-sexiphenyl on the ZnO (101̄0) surface

2016 ◽  
Vol 18 (36) ◽  
pp. 25329-25341 ◽  
Author(s):  
Karol Palczynski ◽  
Philipp Herrmann ◽  
Georg Heimel ◽  
Joachim Dzubiella
Keyword(s):  
Thin Film ◽  
Mass Transport ◽  
Organic Molecules ◽  
Optoelectronic Devices ◽  
Thin Film Deposition ◽  
Essential Elements ◽  
Transport Processes ◽  
Film Deposition ◽  
Conjugated Organic Molecules

Mass transport processes of conjugated organic molecules (COMs) on inorganic surfaces are essential elements in thin film deposition for hybrid optoelectronic devices.

Sign in / Sign up

Export Citation Format

Share Document