A general model for moving-bed reactors with multiple chemical reactions part I: Model formulation

2013 ◽  
Vol 124 ◽  
pp. 58-66 ◽  
Author(s):  
Amir Rahimi ◽  
Arezou Niksiar
Keyword(s):  
Chemical Reactions ◽  
General Model ◽  
Model Formulation ◽  
Moving Bed ◽  
Multiple Chemical

Numerical Methods for Simulating the Reduction of Iron Ore in Blast Furnace Shaft

2013 ◽  
Author(s):  
Dong Fu ◽  
Yan Chen ◽  
Chenn Q. Zhou
Keyword(s):  
Blast Furnace ◽  
Chemical Reactions ◽  
Gas Flow ◽  
Iron Ore ◽  
Solid Phase ◽  
Chemical Reactor ◽  
Layer By Layer ◽  
Moving Bed ◽  
Furnace Shaft ◽  
Counter Current

The blast furnace process is a counter-current moving bed chemical reactor to reduce iron oxides to iron, which involves complex transport phenomena and chemical reactions. The iron ore and coke are alternatively charged into the blast furnace, forming a layer by layer structural burden which is slowly descending in the counter-current direction of the ascending gas flow. A new methodology was proposed to efficiently simulate the gas and solid burden flow in the counter current moving bed in blast furnace shaft. The gas dynamics, burden movement, chemical reactions, heat and mass transfer between the gas phase and solid phase are included. The new methodology has been developed to explicitly consider the effects of the layer thickness thermally and chemically in the CFD model.

Numerical Methods for Simulating the Reduction of Iron Ore in Blast Furnace Shaft

2014 ◽  
Vol 6 (2) ◽  
Author(s):  
Dong Fu ◽  
Chenn Q. Zhou ◽  
Yan Chen
Keyword(s):  
Blast Furnace ◽  
Chemical Reactions ◽  
Gas Flow ◽  
Iron Ore ◽  
Solid Phase ◽  
Chemical Reactor ◽  
Layer By Layer ◽  
Moving Bed ◽  
Furnace Shaft ◽  
Counter Current

The blast furnace process is a counter-current moving bed chemical reactor to reduce iron oxides to iron, which involves complex transport phenomena and chemical reactions. The iron ore and coke are alternatively charged into the blast furnace, forming a layer by layer structural burden which is slowly descending in the counter-current direction of the ascending gas flow. A new methodology was proposed to efficiently simulate the gas and solid burden flow in the counter-current moving bed in blast furnace shaft. The gas dynamics, burden movement, chemical reactions, heat and mass transfer between the gas phase and solid phase are included. The new methodology has been developed to explicitly consider the effects of the layer thickness thermally and chemically in the CFD model.

Networking Chemical Robots Using Twitter for #RealTimeChem

2018 ◽  
Author(s):  
Dario Caramelli ◽  
Daniel Salley ◽  
Alon Henson ◽  
Gerardo Aragon Camarasa ◽  
Salah Sharabi ◽  
...  
Keyword(s):  
Real Time ◽  
Chemical Reactions ◽  
Chemical Processes ◽  
Game Playing ◽  
Coupling Reactions ◽  
Azo Coupling ◽  
Reaction Conditions ◽  
Standard Set ◽  
Multiple Chemical

<p>Herein we present a chemistry capable robot built with a standard set of hardware and software protocols that can be networked to coordinate many chemical experiments in real time, such that the different chemical reactions can be distributed over many sites simultaneously. We demonstrate how multiple chemical processes can be done with two internet connected robots collaboratively, exploring a set of azo-coupling reactions in a fraction of time needed for a single robot, as well as encoding and decoding information into a network of oscillating BZ reactions transferring a message between two different locations using chemical reactions. The system can also be used to assess the reproducibility of chemical reactions and discover new reaction outcomes using game playing to explore a list of reaction conditions not accessible when the robots instead take it in turn to each a pre-define reaction from a list.<br></p>

scholarly journals Networking Chemical Robots Using Twitter for #RealTimeChem

2018 ◽  
Author(s):  
Dario Caramelli ◽  
Daniel Salley ◽  
Alon Henson ◽  
Gerardo Aragon Camarasa ◽  
Salah Sharabi ◽  
...  
Keyword(s):  
Real Time ◽  
Chemical Reactions ◽  
Chemical Processes ◽  
Game Playing ◽  
Coupling Reactions ◽  
Azo Coupling ◽  
Reaction Conditions ◽  
Standard Set ◽  
Multiple Chemical

<p>Herein we present a chemistry capable robot built with a standard set of hardware and software protocols that can be networked to coordinate many chemical experiments in real time, such that the different chemical reactions can be distributed over many sites simultaneously. We demonstrate how multiple chemical processes can be done with two internet connected robots collaboratively, exploring a set of azo-coupling reactions in a fraction of time needed for a single robot, as well as encoding and decoding information into a network of oscillating BZ reactions transferring a message between two different locations using chemical reactions. The system can also be used to assess the reproducibility of chemical reactions and discover new reaction outcomes using game playing to explore a list of reaction conditions not accessible when the robots instead take it in turn to each a pre-define reaction from a list.<br></p>

scholarly journals Solution of Nonlinear Polarization Boundary Conditions

2007 ◽  
Vol 1 (3) ◽  
Author(s):  
E. Chisholm ◽  
L.J. Gray ◽  
G.E. Giles
Keyword(s):  
Boundary Conditions ◽  
Chemical Reactions ◽  
Direct Relationship ◽  
Boundary Integral ◽  
Electrochemical Polarization ◽  
Nonlinear Polarization ◽  
Electrode Surfaces ◽  
Boundary Integral Formulation ◽  
Multiple Chemical ◽  
Electrospray Emitter

An efficient algorithm for solving multiple reaction electrochemical polarization equations is presented. The boundary integral formulation for the electric field (Laplace equation) conveniently provides a direct relationship between potential and current at the electrode surfaces, which can then be coupled to the nonlinear polarization boundary conditions. As a consequence, a successful Gauss-Seidel type iteration, incorporating a nonlinear solve at each step, can be developed. Results are presented for the modeling multiple chemical reactions in an electrospray emitter tube.

Sign in / Sign up

Export Citation Format

Share Document