scholarly journals A fast modeling of chemical reactions in industrial‐scale olefin polymerization fluidized beds using recurrence CFD

AIChE Journal ◽  
2021 ◽  
Author(s):  
Firas Dabbagh ◽  
Stefan Pirker ◽  
Simon Schneiderbauer
Keyword(s):  
Chemical Reactions ◽  
Fluidized Beds ◽  
Olefin Polymerization ◽  
Industrial Scale

A Lagrangian-Eulerian hybrid model for the simulation of poly-disperse fluidized beds: Application to industrial-scale olefin polymerization

2017 ◽  
Vol 316 ◽  
pp. 697-710 ◽  
Author(s):  
Simon Schneiderbauer ◽  
Stefan Pirker ◽  
Stefan Puttinger ◽  
Pablo Aguayo ◽  
Vasileios Touloupidis ◽  
...  
Keyword(s):  
Hybrid Model ◽  
Fluidized Beds ◽  
Olefin Polymerization ◽  
Industrial Scale

Industrial-Scale Study of NaHCO3 Chemical Reactions with HF, HCl and SO2 in Kiln Flue Gases

2001 ◽  
Vol 206-213 ◽  
pp. 855-858 ◽  
Author(s):  
E. Monfort ◽  
I. Celades ◽  
S. Mestre ◽  
R. Bono ◽  
H. Llop ◽  
...  
Keyword(s):  
Chemical Reactions ◽  
Flue Gases ◽  
Industrial Scale

Calculation of Transient Flow in Circulating Fluidized Beds With Straight and Double Abrupt Outlet Configuration: Relation With the Inelasticity of the Particle-Particle Collisions

2001 ◽  
Author(s):  
Juray De Wilde ◽  
Jan Vierendeels ◽  
Geraldine J. Heynderickx ◽  
Erik Dick ◽  
Guy B. Marin
Keyword(s):  
Kinetic Theory ◽  
Gravity Waves ◽  
Granular Flow ◽  
Fluidized Beds ◽  
Transient Flow ◽  
Industrial Scale ◽  
Circulating Fluidized Beds ◽  
Restitution Coefficient ◽  
Particle Collisions ◽  
The Stability

Abstract Gas-solid flow in industrial scale Circulating Fluidized Beds (CFB’s) is calculated in 3D using the Eulerian-Eulerian approach and the Kinetic Theory of Granular Flow (KTGF). Two outlet configurations are used: a straight top outlet and a double abrupt T-outlet. The effect of the value of the restitution coefficient for particle-particle collisions on the stability of the flow is investigated. Oscillations appearing in CFB’s, are shown to be gravity waves.

Development of data-driven filtered drag model for industrial-scale fluidized beds

2021 ◽  
Vol 230 ◽  
pp. 116235
Author(s):  
Yundi Jiang ◽  
Xiao Chen ◽  
Jari Kolehmainen ◽  
Ioannis G. Kevrekidis ◽  
Ali Ozel ◽  
...  
Keyword(s):  
Fluidized Beds ◽  
Data Driven ◽  
Industrial Scale ◽  
Drag Model

Transient Reacting Flow Simulation of Spouted Fluidized Bed for Coal-Direct Chemical Looping Combustion

2015 ◽  
Vol 7 (2) ◽  
Author(s):  
Subhodeep Banerjee ◽  
Ramesh K. Agarwal
Keyword(s):  
Chemical Reactions ◽  
Power Plants ◽  
High Efficiency ◽  
Oxygen Carrier ◽  
Laboratory Scale ◽  
Industrial Scale ◽  
Chemical Looping Combustion ◽  
Great Promise ◽  
Reacting Flow ◽  
Chemical Looping

Coal-direct chemical-looping combustion (CD-CLC) is a next generation combustion technology that shows great promise as a solution for the need of high-efficiency low-cost carbon capture from fossil fueled power plants. To realize this technology on an industrial scale, the development of high-fidelity simulations is a necessary step to develop a thorough understanding of the CLC process. In this paper, simulations for multiphase flow of the CD-CLC process with chemical reactions are performed using ANSYS Fluent computational fluid dynamics (CFD) software. The details of the solid–gas two-phase hydrodynamics in the CLC process are investigated using the Lagrangian particle-tracking approach called the discrete element method (DEM) for the movement and interaction of the solid oxygen carrier particles with the gaseous fuel. The initial CFD/DEM simulation shows excellent agreement with the experimental results obtained in a laboratory scale fuel reactor in cold-flow conditions at Darmstadt University of Technology. Subsequent simulations using 60% Fe2O3 supported on MgAl2O4 reacting with gaseous CH4 demonstrate successful integration of chemical reactions into the CFCD/DEM approach. This work provides a strong foundation for future simulations of CD-CLC systems using solid coal as fuel, which will be crucial for successful deployment of CD-CLC technology from the laboratory scale to pilot and industrial scale projects.

Impact of a draft tube on industrial-scale Fluid Coker™ Spray Jets in fluidized beds

2017 ◽  
Vol 96 (1) ◽  
pp. 317-322 ◽  
Author(s):  
M. Ali ZirGachian ◽  
Cedric Briens ◽  
Franco Berruti ◽  
Jennifer McMillan
Keyword(s):  
Fluidized Beds ◽  
Draft Tube ◽  
Industrial Scale ◽  
Spray Jets

CFD modeling and simulation of industrial scale olefin polymerization fluidized bed reactors

2015 ◽  
Vol 264 ◽  
pp. 99-112 ◽  
Author(s):  
Simon Schneiderbauer ◽  
Stefan Puttinger ◽  
Stefan Pirker ◽  
Pablo Aguayo ◽  
Vasileios Kanellopoulos
Keyword(s):  
Modeling And Simulation ◽  
Fluidized Bed ◽  
Olefin Polymerization ◽  
Industrial Scale ◽  
Cfd Modeling ◽  
Fluidized Bed Reactors

scholarly journals A versatilidade das argilas e as propriedades dos sítios superficiais de interação

2015 ◽  
Vol 40 (1) ◽  
pp. 192 ◽  
Author(s):  
Ana Paula Mangoni ◽  
Patrícia Moura Dias ◽  
Vera Leopoldo Constantino
Keyword(s):  
Chemical Reactions ◽  
Electrostatic Interactions ◽  
Active Sites ◽  
Solid Surfaces ◽  
Industrial Scale ◽  
Chemical Transformations ◽  
Natural Processes ◽  
Inorganic Species

This article presents in a simplified and introductory way, the active sites present on the surfaces of clays that make them so versatile. These sites are responsible for interactions between the clay and organic or inorganic species, and the chemical transformations of substrates that occur on the surface, allowing to understand either natural processes in the environment or those performed on an industrial scale. It is proposed that this text can illustrate, in the classroom, fundamental concepts (types of chemical reactions, electrostatic interactions and other ones) from processes on solid surfaces. The correlation between the active sites of clays and their properties is a rich topic to be explored in chemistry disciplines.

Sign in / Sign up

Export Citation Format

Share Document