Conceptual Design and Preliminary Hydrodynamic Study of an Agro Biomass Bench Gasification Fluidized Bed Reactor

2008 ◽  
Vol 6 (1) ◽  
Author(s):  
Anastasia Zabaniotou ◽  
Vasiliki Skoulou ◽  
George Koufodimos ◽  
Zissis Samaras
Keyword(s):  
Fluidized Bed ◽  
Fluidized Bed Reactor ◽  
Agricultural Residues ◽  
External Diameter ◽  
Minimum Fluidization Velocity ◽  
Production Activity ◽  
Hydrodynamic Study ◽  
Fluidized Bed Gasifier ◽  
Bed Material ◽  
Theoretical Results

Theoretical and experimental analysis was conducted in a bench scale, atmospheric fluidized bed gasifier, designed and constructed for exploitation of residues issued from olive oil production activity and other agricultural residues. Research was focused on the effect of bed material quantity and particle size diameter on the fluidization quality, characterized by regarding bed pressure drop and minimum fluidization velocity. Experiments were carried out, under cold conditions, with a bed with an external diameter of 60 mm (internal 54,4 mm), and a comparison of the first experimental data with theoretical results that addressed the validity of the theoretical model.

scholarly journals Effect of Fines Content on Fluidity of FCC Catalysts for Stable Operation of Fluid Catalytic Cracking Unit

Energies ◽  
2019 ◽  
Vol 12 (2) ◽  
pp. 293 ◽  
Author(s):  
Sung Kim ◽  
Chae Yeo ◽  
Do Lee
Keyword(s):  
Fluidized Bed ◽  
Catalytic Cracking ◽  
Particle Diameter ◽  
Fluidized Bed Reactor ◽  
Fluid Catalytic Cracking ◽  
Stable Operation ◽  
Minimum Fluidization Velocity ◽  
Fines Content ◽  
Fluidization Velocity ◽  
Fcc Catalysts

Effect of fines content (weight % of particles with diameter less than 45 μm) on bed fluidity was determined to get a base for good fluidization quality in the fluid catalytic cracking (FCC) unit. The fines content in equilibrium FCC catalysts (Ecat) from commercial units were controlled by adding or removing the fines to simulate commercial situation. To get the fluidity values (Umb/Umf) of seven different FCC catalysts (2 Ecats and 5 fresh catalysts) and their mixture, minimum fluidization velocity (Umf) and minimum bubbling velocity (Umb) were measured in a fluidized bed reactor (0.05 m ID). The fluidity decreased with loss of fines content and increased with increments of makeup of fresh catalysts or additive with the controlled fines content. The fluidities of catalysts increase with increases of normalized particle diameter variation by the fines addition. The obtained fluidities have been correlated with the fines contents and the catalyst and gas properties. The proposed correlation could guide to keep good catalyst fluidity in the FCC unit.

The Phase Transformations during Fluidized-Bed Combustion of Biomass

2013 ◽  
Vol 419 ◽  
pp. 366-369 ◽  
Author(s):  
Hai Peng Teng ◽  
Bin Yang ◽  
Bin Liang
Keyword(s):  
Gas Phase ◽  
Fluidized Bed ◽  
Solid Phase ◽  
Fluidized Bed Reactor ◽  
Biomass Combustion ◽  
Material Surface ◽  
Fluidized Bed Combustion ◽  
Biomass Ash ◽  
Equilibrium Modeling ◽  
Bed Material

FactSage6.1 was used to study the phase transformation at high temperature when biomass combustion in a fluidized bed reactor. The results show that eutectic was formed during the reaction process, the eutectics are formed mainly by the reaction between the silica in bed particles and the alkali species in biomass ash. The solid phase transformed to melt layer on the surface of sands particle mainly contains potassium, some calcium and magnesium, and also a few phosphorus and chlorine are found in the melt layer. The result utilizing FactSage equilibrium modeling shown that the distribution ratio of potassium in the gas phase increased with the increase of temperature, moreover, the melt of bed material surface increased when defluidized occurred.

Catalytic gasification of woody biomass in an air-blown fluidized-bed reactor using Canadian limonite iron ore as the bed material

Fuel ◽  
2012 ◽  
Vol 91 (1) ◽  
pp. 170-176 ◽  
Author(s):  
Scott Hurley ◽  
Chunbao (Charles) Xu ◽  
Fernando Preto ◽  
Yuanyuan Shao ◽  
Hanning Li ◽  
...  
Keyword(s):  
Fluidized Bed ◽  
Iron Ore ◽  
Woody Biomass ◽  
Fluidized Bed Reactor ◽  
Catalytic Gasification ◽  
Bed Material

scholarly journals Development of a Sawdust Fluidized Bed Gasifier: Design and Fabrication

2020 ◽  
pp. 1-11
Author(s):  
O. R. Akinyemi ◽  
N. G. Olaiya
Keyword(s):  
Fluidized Bed ◽  
Steel Plate ◽  
External Surface ◽  
Fluidized Bed Reactor ◽  
Combustible Gas ◽  
University Of Technology ◽  
Synthetic Gas ◽  
Ondo State ◽  
Fluidized Bed Gasifier ◽  
Distributor Plate

Aims: This research involves the development of a sawdust fired fluidized bed reactor for the production of synthetic gas for domestic cooking. Study Design: A sawdust fired fluidized bed reactor using AutoCAD inventor. Place and Duration of Study: Department of Mechanical Engineering, Federal University of Technology, Akure Ondo state Nigeria. Methodology: The reactor consists of a hopper, rolled mild steel plate frame lined with clay which forms the frame, air distributor plate and five radially spaced tuyeres. The reactor is fed with pelletized sawdust, retain heat within it and maintain a temperature of 50⁰C at the external surface to minimize burns. Results: Air was forced into the plenum, after which the air distributor plate evenly distributed jets of air in the bed resulting in complete and incomplete combustion. Combustible gas was produced after 30 minutes and used to boil water. Conclusion: The sawdust fired fluidized bed reactor is recommended for domestic household use.

Effect of Bed Material on Oxygen/Steam Gasification of Two Solid Recovered Fuels (SRFs) in a Bench-Scale Fluidized-Bed Reactor

2017 ◽  
Vol 31 (8) ◽  
pp. 8445-8453 ◽  
Author(s):  
J. Recari ◽  
C. Berrueco ◽  
S. Abelló ◽  
D. Montané ◽  
X. Farriol
Keyword(s):  
Fluidized Bed ◽  
Fluidized Bed Reactor ◽  
Steam Gasification ◽  
Bench Scale ◽  
Bed Material
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