Experimental Tests with Rice Straw on a Conical Square-Based Spouted Bed Reactor
-
Cristina Moliner
,
Massimo Curti
Abstract
A spouting bed reactor using rice straw as feedstock for further gasification purposes was studied in the present work. Experimental fluid dynamic tests were carried out in a conical square-based spouted bed reactor using a mixture of straw and silica, the latter acting as inert material. The influence of the initial bed of particles and the presence of coarse particles in the mixture on the pressure drop and minimum spouting velocity were evaluated. As a result, lower values of pressure drop along the bed were found compared to conventional fluidisation processes. Higher initial bed heights and higher percentage of straw in the mixture resulted in higher values of pressure drop and minimum spouting velocity. A new correlation for a cross section spouted bed reactor was proposed for the prediction of the minimum spouting velocity.
Nomenclature
- Dc, Di, Dm
column, spout inlet and bed bottom diameter (m)
- dpeff
effective particle diameter (m)
- H, HC,HR
height of the static bed, conical section and total of the reactor (m)
- Uin, Ums
fluid inlet and minimum spouting velocity (m/s)
Greek symbols
- ∆Pb
pressure drop along the bed of particles (mm H2O)
- ∆Pbmax, ∆Ps
maximum and stable pressure drop along the bed of particles (mm H2O)
- ∆Pd
difference between conventional fluidization and spouting pressure drops (mm H2O)
- ∆PT
total pressure drop of the system (mmHg)
- Α
base angle
- ρair
air density (kg/m3)
- ρeff
effective particle density (kg/m3)
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©2015 by De Gruyter
Artikel in diesem Heft
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Artikel in diesem Heft
- Frontmatter
- Reviews
- Fischer–Tropsch Synthesis in Slurry Bubble Column Reactors: Experimental Investigations and Modeling – A Review
- Computational Fluid Dynamics-Based Hydrodynamics Studies in Packed Bed Columns: Current Status and Future Directions
- Research Articles
- Optimized Modular Design and Experiment for Staggered Herringbone Chaotic Micromixer
- Effects of the Types and Addition Amounts of Sludge on the True Rheological Properties of Petroleum Coke Slurry Flowing in Pipelines
- Stabilization of Fast Pyrolysis Oil Derived from Wood through Esterification
- CO2 Sorption by Hydrotalcite-Like Compounds in Dry and Wet Conditions
- Experimental Tests with Rice Straw on a Conical Square-Based Spouted Bed Reactor
- Kinetics for an Optimized Biosynthesis of Silver Nanoparticles Using Alfalfa Extracts
- Assessing the Feasibility of Optical Probe in Phase Holdup Measurements and Flow Regime Identification
- Modeling Study of Crude Oil Enhanced Removal in a Two-Liquid Phase Partitioning Bioreactor
- Application of Deep Eutectic Solvent (DES) as a Reaction Media for the Esterification of Acrylic Acid with n-Butanol
- Transesterification of Degummed Jatropha curcas Oil Using Tri-potassium Phosphate as Base Catalyst
- Process Intensification for Production of Ethyl Lactate from Fermentation-Derived Magnesium Lactate: A Preliminary Design
- A Study on the Production of Isophthalic Acid from M-xylene under the Catalysis of Cobalt and H3PW12O40/Carbon Modified by HNO3 Solution
- Statistical Medium Optimization for the Increased Production of Recombinant Phytase in the Fed-Batch Cultivation of Pichia pastoris
- Catalytic Degradation of Pyrrole in Aqueous Solution by Cu/SBA-15
