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Development of a Continuous Fluidized Bed Reactor for .

Until now, fixed bed reactors are the state of the art for TCES systems. However, fluidized bed reactors offer significant advantages for scale-up of the system: the improved heat and mass transfer allows for higher charging/discharging power, whereas the favorable, continuous operation mode enables a decoupling of storage power and capacity.

Integrated Particle- and Reactor-Scale Simulation of Pine .

@article{osti_1471476, title = {Integrated Particle- and Reactor-Scale Simulation of Pine Pyrolysis in a Fluidized Bed}, author = {Pecha, M. Brennan and Ramirez, Emilio and Wiggins, Gavin M. and Carpenter, Daniel and Kappes, Branden and Daw, Stuart and Ciesielski, Peter N.}, abstractNote = {We report results from a multiscale computational modeling study of biomass fast pyrolysis in an .

Oxygen-Carrier-Aided Combustion in a Bench-Scale Fluidized Bed

In a circulating fluidized bed (CFB) boiler, one of the basic functions of the bed materials is to transport heat between different parts of the boiler to decrease heat gradients and, thereby, smoothen the operation. A novel concept, oxygen-carrier-aided combustion (OCAC), replaces some or all of the bed materials with an oxygen carrier, which is a metal oxide that, through chemical redox .

Fluidized Bed Reactor (Gas-Solid) CFD Simulation | Mr-CFD

Fluidized Bed Reactors. A reactor is a device for performing chemical reactions (conversion, composition, decomposition, etc.) using catalysts and, as a result, the conversion of raw materials into desired products. We can build reactors on both large-scale industrial and small-scale laboratory scales.

Simulation for Supporting Scale-Up of a Fluidized Bed .

Simulation of fluidized bed reactor (FBR) was accomplished for treating wastewater using Fenton reaction, which is an advanced oxidation process (AOP). The simulation was performed to determine characteristics of FBR performance, concentration profile of the contaminants, and various prominent hydrodynamic properties (e.g., Reynolds number, velocity, and pressure) in the reactor.

Numerical analysis of the dynamics of two- and three .

Fluidized bed Euler–Lagrange Three-dimensional simulation Large-scale simulation Bubble dynamics Residence time Biomass thermochemical conversion, often done in fluidized beds, recently gained a lot of attention due to its potential to efficiently produce renewable liquid fuels. Optimization of reactor design and operating condi-

Fluidized bed | BioEnergy Consult

Jun 20, 2020 · Fluidized bed combustors (FBC), which use a bed of hot inert material such as sand, are a more recent development. Bubbling FBCs are generally used at 10-30 MWth capacity, while Circulating FBCs are more applicable at larger scales. Advantages of FBCs are that they can tolerate a wider range of poor quality fuel, while emitting lower NOx levels.

Catalytic hydrolysis of alkaline sodium borohydride .

In addition, a comparison was performed between the batch reactor and micro‐fluidized bed reactor during the process of hydrogen generation. Moreover, when the concentration of NaBH 4 reached 1 and 2 wt%, the efficiency and stability of the micro‐fluidized bed reactor were identified as superior to those of the batch reactor.

Experimental investigation of pyrolysis of rice straw .

Downloadable (with restrictions)! Energy conversion efficiencies of three pyrolysis reactors (bench-scale auger, batch, and fluidized bed) were investigated using rice straw as the feedstock at a temperature of 500 °C. The highest bio-oil yield of 43% was obtained from the fluidized bed reactor, while the maximum bio-char yield of 48% was obtained from the batch reactor.

Fluidized Bed Reactor (Gas-Solid) CFD Simulation

May 03, 2020 · A reactor is a device for performing chemical reactions (conversion, composition, decomposition, etc.) using catalysts and, as a result, the conversion of raw .

Fluidized Bed Reactors | SpringerLink

Fang F, Li Z-S, Cai N-S (2009) Experiment and modeling of CO (_2) capture from flue gases at high temperature in a fluidized bed reactor with Ca-based sorbents. Energy .

in an Autothermal Bubbling Fluidized Bed Reactor

energies Article Experimental Evaluation of Napier Grass Gasification in an Autothermal Bubbling Fluidized Bed Reactor Ramin Khezri 1, Wan Azlina Wan Ab Karim Ghani 1,2,*, Dayang Radiah Awang Biak 1, Robiah Yunus 1 and Kiman Silas 1 1 Department of Chemical and Environmental Engineering, Faculty of Engineering, Universiti Putra Malaysia, Serdang 43400, Malaysia; .

Scale Multi-walled Carbon Nanotubes

deposition method in a fluidized bed reactor in producing multi-walled carbon nanotubes to support large-scale production. To carry out this study, three major key factors were conducted to develop a large-scale fluidized bed reaction in the future. Firstly it examines the effect of the catalyst

Catalytic hydrolysis of alkaline sodium borohydride .

In addition, a comparison was performed between the batch reactor and micro‐fluidized bed reactor during the process of hydrogen generation. Moreover, when the concentration of NaBH 4 reached 1 and 2 wt%, the efficiency and stability of the micro‐fluidized bed reactor were identified as superior to those of the batch reactor.

Multi-scale CFD simulation of hydrodynamics and cracking .

Aug 15, 2015 · Abstract. Fixed fluidized bed reactor is widely used to evaluate the crackability of heavy oils and the activity of catalysts. To understand the hydrodynamics, reaction kinetics and thermodynamics in conventional and modified fixed fluidized bed reactors, the computational fluid dynamics method, energy-minimization multi-scale-based two-fluid model coupled with a six-lump kinetic model was .

CFD prediction of gasification in fluidized bed | RISE:2020

Today, computational modeling of different hydrodynamic regimes in fluidized beds plays a key role in predicting gasifiers' operation. This effort is particularly important since it helps extend the use of biomass in energy industry. The traditional approach to design a fluidized bed reactor involves comprehensive experimentations, progressing from laboratory bench-scale units, to pilot .

Review on the applications and development of fluidized .

Fluidized bed electrodes (FBEs), which were discovered in the late 1960s, are 3D (three-dimensional) particle electrodes. The FBEs have been attracting extensive attention because of their unique properties and advantages, such as higher space-time yield, high active electrode area, and higher mass transfer rate than conventional electrochemical reactors.

Fluidized bed reactor - Wikipedia

A fluidized bed reactor (FBR) is a type of reactor device that can be used to carry out a variety of multiphase chemical reactions. In this type of reactor, a fluid (gas or liquid) is passed through a solid granular material (usually a catalyst possibly shaped as tiny spheres) at high enough speeds to suspend the solid and cause it to behave as though it were a fluid.

MODELING OF BIOMASS PYROLYSIS FOR HYDROGEN .

bed reactors especially suited to continuous operation. In spite of the attractive simplicity of the reactor design, no thorough analyses are available of ßuidized pyrolysis reactors addressing issues such as efÞciency, optimal operating conditions and scale up for commercial use. Although the literature addressing the modeling of the biomass .

Optimization of fluidized bed carbochlorination of .

Ilmenite ore in the batch type fluidized bed. Rhee and Sohn[18]developed a more detailed model that incorporate the solid mixing. Youn and Park [19] developed a model to simulate the chlorination of rutile with coke in a fluidized bed. The main objective of this work was to design and build a pilot-scale carbochlorination fluidized bed reactor with

Design of a laboratory scale fluidized bed reactor: Review .

The size of the laboratory scale fluidized bed reactor is 5 kW, which corresponds to a fuel-feeding rate of approximately 1 kg/h. The reactor system consists of four parts: a bed section, a freeboard section, a convector (postcombustion zone), and .

Coal gasification in a pilot scale fluidized bed reactor .

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Numerical simulation of scale-up effects of methanol-to .

Scale-up of fluidized bed reactors has long been regarded as a big challenge in chemical reaction engineering. While traditional scaling theories are mostly based on hydrodynamics similarity, computational fluid dynamics (CFD) aided approach allows direct coupling between hydrodynamics and reaction factors and is expected to speed up the experiment-based scale-up process with lower cost.

Hydrodynamic Modelling of Municipal Solid Waste Residues .

energies Article Hydrodynamic Modelling of Municipal Solid Waste Residues in a Pilot Scale Fluidized Bed Reactor João Cardoso 1, Valter Silva 1,2,* ID, Daniela Eusébio 1 and Paulo Brito 1 1 C3i—Interdisciplinary Center for Research and Innovation, Polytechnic Institute of Portalegre, 7300-110 Portalegre, Portugal; [email protected] (J.C.); danielafl[email protected] (D.E.);

Design and Fabrication of a Low Cost Fluidized Bed Reactor

2005). The major parts of the fluidized bed reactors are: the fluidization vessel, the solids discharge, dust separator for the exit gas, the air supply and heat supply. A fluidized bed is a vessel containing a bed of solid particles, e.g. sand or catalytically active particles, and a method of introducing gas from below.

Circulating Fluidized Bed Technology - 1st Edition

Circulating Fluidized Bed Technology II is a result of a series of science-related conferences in the 1980s. The text contains various studies, facts, and discussions on fluidized beds. The book begins by going through the rise and fall of circulating systems, specifically fluid dynamics.

Directly Irradiated Fluidized Bed Reactor for .

This work deals with the development of a directly irradiated labâ€'scale fluidized bed reactor targeted at maximizing the collection of solar energy, withstanding the highâ€'concentrated flux typical of highâ€'temperature CSP applications (> 1 MW/m 2) and ensuring a uniform temperature distribution of the reactive material. The .

Fluidized Bed Reactor (Gas-Solid) CFD Simulation | Mr-CFD

Fluidized Bed Reactors. A reactor is a device for performing chemical reactions (conversion, composition, decomposition, etc.) using catalysts and, as a result, the conversion of raw materials into desired products. We can build reactors on both large-scale industrial and small-scale laboratory scales.

Fluidized Bed Reactor (Gas-Solid) CFD Simulation | Mr-CFD

Fluidized Bed Reactors. A reactor is a device for performing chemical reactions (conversion, composition, decomposition, etc.) using catalysts and, as a result, the conversion of raw materials into desired products. We can build reactors on both large-scale industrial and small-scale laboratory scales.

Design and Construction of a Small-Scale Fixed-Bed Reactor

air gasification of wheat straw was studied by Ergundenler (1993) using a fluidized bed reactor. He showed that, at equivalence ratio of 0.25, the mole fraction of the combustible products is at their maximum. The air gasification of sawdust with a fluidized bed reactor