Effect of mass transfer and solution composition on the quantification of reaction kinetics by differential electrochemical mass spectrometry

2021 ◽  
Vol 56 ◽  
pp. 412-419
Author(s):  
Wei Chen ◽  
Nestor Uwitonze ◽  
Fan He ◽  
Matthew M. Sartin ◽  
Jun Cai ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Mass Transfer ◽  
Reaction Kinetics ◽  
Solution Composition ◽  
Differential Electrochemical Mass Spectrometry

Building a Differential Electrochemical Mass Spectrometry (DEMS): A Powerful Toll for Investigation of (photo)Electrochemical Processes

2021 ◽  
Vol MA2021-01 (46) ◽  
pp. 1873-1873
Author(s):  
Adriana Queiroz ◽  
Wanderson Oliveira da Silva ◽  
Daniel Cantane ◽  
Igor Messias ◽  
Maria Rodrigues Pinto ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Differential Electrochemical Mass Spectrometry ◽  
Electrochemical Processes

CFD Simulation of the Particle Dispersion Behavior and Mass Transfer–Reaction Kinetics in non-Newton Fluid with High Viscosity

2019 ◽  
Vol 17 (7) ◽  
Author(s):  
Le Xie ◽  
Qi-An Wang ◽  
Xian-Jin Luo ◽  
Zheng-Hong Luo
Keyword(s):  
Mass Transfer ◽  
Reaction Kinetics ◽  
Transfer Reaction ◽  
High Viscosity ◽  
Particle Dispersion ◽  
Agitation Speed ◽  
Fluid Viscosity ◽  
Condensation Polymerization ◽  
Cross Model ◽  
Dispersion Behavior

Abstract Solid particle dispersion and chemical reactions in high-viscosity non-Newtonian fluid are commonly encountered in polymerization systems. In this study, an interphase mass transfer model and a finite-rate/eddy-dissipation formulation were integrated into a computational fluid dynamics model to simulate the dispersion behavior of particles and the mass transfer–reaction kinetics in a condensation polymerization-stirred tank reactor. Turbulence fields were obtained using the standard k–ε model and employed to calculate the mixing rate. Cross model was used to characterize the rheological property of the non-Newton fluid. The proposed model was first validated by experimental data in terms of input power. Then, several key operating variables (i.e. agitation speed, viscosity, and particle size) were investigated to evaluate the dispersive mixing performance of the stirred vessel. Simulation showed that a high agitation speed and a low fluid viscosity favored particle dispersions. This study provided useful guidelines for industrial-scale high-viscosity polymerization reactors.

A study on mass transfer–reaction kinetics of NO absorption by using UV/H2O2/NaOH process

Fuel ◽  
2013 ◽  
Vol 108 ◽  
pp. 254-260 ◽  
Author(s):  
Yangxian Liu ◽  
Jianfeng Pan ◽  
Aikun Tang ◽  
Qian Wang
Keyword(s):  
Mass Transfer ◽  
Reaction Kinetics ◽  
Transfer Reaction ◽  
Kinetics Of ◽  
No Absorption
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