Synthesis of Reactive Distillation Systems with Multiple Equilibrium Chemical Reactions

1995 ◽  
Vol 34 (8) ◽  
pp. 2555-2565 ◽  
Author(s):  
Sophie Ung ◽  
Michael F. Doherty
Keyword(s):  
Chemical Reactions ◽  
Reactive Distillation ◽  
Multiple Equilibrium ◽  
Equilibrium Chemical

A method for incorporating equilibrium chemical reactions into multiphase flow models for CO2 storage

2013 ◽  
Vol 62 ◽  
pp. 431-441 ◽  
Author(s):  
Maarten W. Saaltink ◽  
Victor Vilarrasa ◽  
Francesca De Gaspari ◽  
Orlando Silva ◽  
Jesús Carrera ◽  
...  
Keyword(s):  
Multiphase Flow ◽  
Chemical Reactions ◽  
Co2 Storage ◽  
Flow Models ◽  
Equilibrium Chemical

NUMERICAL SIMULATION OF MHD FLOWS WITH NON-EQUILIBRIUM CHEMICAL REACTIONS ON UNSTRUCTURED MESHES

2009 ◽  
Vol 23 (03) ◽  
pp. 297-300
Author(s):  
JIANGFENG WANG ◽  
YIZHAO WU ◽  
KEMING CHENG
Keyword(s):  
Magnetic Field ◽  
Chemical Reactions ◽  
Time Integration ◽  
Unstructured Meshes ◽  
Reaction Model ◽  
Mhd Equations ◽  
Chemical Components ◽  
Mhd Flows ◽  
Equilibrium Chemical ◽  
Non Equilibrium

Two dimensional hypersonic magnetohydrodynamics(MHD) flows with the chemical non-equilibrium effects are numerically simulated using upwind splitting scheme based on unstructured meshes. The governing equations are 2D MHD equations with the chemical components, where 5 species and 17 chemical reactions are considered. The AUSM scheme is implemented in the spatial discretization for the MHD equations, and an explicit 5-stage Runge-Kutta scheme is used for time integration. A loosely coupled approach is used to communicate between the MHD equations and the chemical reaction model. The computational model is a 2D blunt body, around which a dipole magnetic field is located. With hypersonic incoming flows, four different cases are numerically simulated to analyze the effects caused by the magnetic field and/or non-equilibrium chemical reactions. Numerical results are obtained and compared well with available data.

scholarly journals Self-sustained Marangoni Flows Driven by Chemical Reactions

2021 ◽  
Author(s):  
Anne-Déborah C. Nguindjel ◽  
Peter A. Korevaar
Keyword(s):  
Chemical Reactions ◽  
Self Assembly ◽  
Marangoni Flow ◽  
Chemical Systems ◽  
Fuel Delivery ◽  
Threshold Conditions ◽  
The Impact ◽  
Assembly Pathways ◽  
Equilibrium Chemical ◽  
Photoacid Generator

Out-of-equilibrium chemical systems, comprising reaction networks and molecular self-assembly pathways, rely on the delivery of reagents. Rather than via external flow, diffusion or convection, we aim at self-sustained reagent delivery. Therefore, we explore how the coupling of Marangoni flow with chemical reactions can generate self-sustained flows, driven by said chemical reactions, and – in turn – sustained by the delivery of reagents for this reaction. We combine a photoacid generator with a pH-responsive surfactant, such that local UV exposure decreases the pH, increases the surface tension and triggers the emergence of a Marangoni flow. We study the impact of reagent concentrations and identify threshold conditions at which flow can emerge. Surprisingly, we unraveled an antagonistic influence of the reagents on key features of the flow such as interfacial velocity and duration, and rationalize these findings via a kinetic model. Our study displays the potential of reaction-driven flow to establish autonomous control in fuel delivery of out-of-equilibrium systems.

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