Open Access. Powered by Scholars. Published by Universities.®
- Discipline
-
- Chemical Engineering (834)
- Materials Science and Engineering (550)
- Biomedical Engineering and Bioengineering (510)
- Industrial Engineering (205)
- Operations Research, Systems Engineering and Industrial Engineering (205)
-
- Civil and Environmental Engineering (201)
- Environmental Engineering (105)
- Engineering Education (97)
- Electrical and Computer Engineering (28)
- Biochemical and Biomolecular Engineering (5)
- Nanoscience and Nanotechnology (3)
- Semiconductor and Optical Materials (3)
- Energy Systems (1)
- Mechanical Engineering (1)
- Keyword
-
- Fluidization Technology (86)
- Biochar (38)
- Bioenergy (32)
- Thermal Barrier Coatings (32)
- Perfusion (31)
-
- E-technologies (30)
- Pyrolysis (29)
- Fluidized bed (22)
- CFB (20)
- CHO (20)
- CFD (19)
- Metabolic Engineering (19)
- Biomass (18)
- CHO cells (18)
- Phosphates (18)
- Hydrodynamics (17)
- Clean Energy (14)
- Earthquake (14)
- Functional Glasses (14)
- Landslide (14)
- Fluidized Bed (13)
- Materials Genome (13)
- Presentations (13)
- Product quality (13)
- LCA (11)
- Modeling (11)
- Nanotechnology (11)
- Posters (11)
- Risk (11)
- Scale-up (11)
- Publication Year
- Publication
-
- Cell Culture Engineering XV (246)
- The 14th International Conference on Fluidization – From Fundamentals to Products (132)
- The 12th International Conference on Fluidization - New Horizons in Fluidization Engineering (131)
- Nanomechanical Testing in Materials Research and Development V (123)
- The 13th International Conference on Fluidization - New Paradigm in Fluidization Engineering (122)
-
- Composites at Lake Louise (CALL 2015) (112)
- 10th International Conference on Circulating Fluidized Beds and Fluidization Technology - CFB-10 (95)
- Integrated Continuous Biomanufacturing II (85)
- Fluidization XV (72)
- Electric Field Assisted Sintering and Related Phenomena Far From Equilibrium (70)
- Heat Exchanger Fouling and Cleaning VII (63)
- BIO-CHAR: Production, Characterization and Applications (62)
- 5th International Conference on Porous Media and Their Applications in Science, Engineering and Industry (59)
- Single-Use Technologies: Bridging Polymer Science to Biotechnology Applications (57)
- CO2 Summit II: Technologies and Opportunities (55)
- BioEnergy IV: Innovations in Biomass Conversion for Heat, Power, Fuels and Chemicals (51)
- Wastewater and Biosolids Treatment and Reuse: Bridging Modeling and Experimental Studies (50)
- Bioenergy - I: From Concept to Commercial Processes (49)
- Bioenergy - II: Fuels and Chemicals from Renewable Resources (49)
- Enhanced, Compact and Ultra-Compact Heat Exchangers: Science, Engineering and Technology (49)
- Heat Exchanger Fouling and Cleaning - Challenges and Opportunities (49)
- Vaccine Technology IV (48)
- Thermal Barrier Coatings IV (47)
- Geohazards (46)
- Heat Exchanger Fouling and Cleaning: Fundamentals and Applications (44)
- CO2 Summit: Technology and Opportunity (40)
- Bioenergy III: Present and New Perspectives on Biorefineries (38)
- Pyroliq 2019: Pyrolysis and Liquefaction of Biomass and Wastes (37)
- Teaching Entrepreneurship to Engineering Students (36)
- Vaccine Technology III (35)
- File Type
Articles 2251 - 2280 of 2957
Full-Text Articles in Engineering
Particle Segregation In Tapered Fluidized Beds, T. M. Gernon, Mark A. Gilbertson, R.S.J. Sparks
Particle Segregation In Tapered Fluidized Beds, T. M. Gernon, Mark A. Gilbertson, R.S.J. Sparks
The 13th International Conference on Fluidization - New Paradigm in Fluidization Engineering
In practical situations, a bed of particles often has a wide range of sizes or is a mixture of differently sized components, and this allows a number of different segregation structures to form depending on local flow conditions. These vary systematically in tapered beds. This paper is an experimental investigation of the interaction between size segregation and the effects on local flows in a tapered bed.
Numerical And Experimental Steady State Flow And Heat Transfer In A Continuous Spouted Bed, Cezar A. Rosa, José T. Freire, Hamid Arastoopour
Numerical And Experimental Steady State Flow And Heat Transfer In A Continuous Spouted Bed, Cezar A. Rosa, José T. Freire, Hamid Arastoopour
The 13th International Conference on Fluidization - New Paradigm in Fluidization Engineering
Experimental measurements on heat transfer and flow properties and CFD simulations based on the two-fluid model (Eulerian-Eulerian approach) were performed in a draft tube continuous spouted bed system. The simulated results on the gas-particle flow patterns and the temperature distribution in the bed agreed well with our experimental data.
Numerical Study Of Bubbling Fluidized Beds: Influence Of Immersed Tubes, Extraction Methods And Averaging Periods, Matthias Schreiber, Teklay Weldeabzgi Asegehegn, Hans Joachim Krautz
Numerical Study Of Bubbling Fluidized Beds: Influence Of Immersed Tubes, Extraction Methods And Averaging Periods, Matthias Schreiber, Teklay Weldeabzgi Asegehegn, Hans Joachim Krautz
The 13th International Conference on Fluidization - New Paradigm in Fluidization Engineering
Numerical simulations using the Two Fluid Model were performed for 2D gas-solid fluidized beds with and without immersed horizontal tubes. The results were compared with experimental data available in the literature. Different techniques of extracting the time-averaged values of pressure drop and bed expansion and the influence of averaging time were investigated. Furthermore, the influence of tubes on the solids motion and distribution were studied.
Basic Study For Coal Moisture Control Integrating Pneumatic Classification Technique, Zhou-En Liu, Yin Wang, Yajun Tian, Yimin Xie, Wenfeng Ji, Guangwen Xu
Basic Study For Coal Moisture Control Integrating Pneumatic Classification Technique, Zhou-En Liu, Yin Wang, Yajun Tian, Yimin Xie, Wenfeng Ji, Guangwen Xu
The 13th International Conference on Fluidization - New Paradigm in Fluidization Engineering
A technique of coal moisture control integrating pneumatic classification with flue gas as heating medium was put forward. With this technique, refined coal moisture control can be realized accompanying classification in one process, and considerable high-quality energy can be saved in coking and milling procedure. In this paper, coal classification and moisture control behaviors was investigated at different conditions. Based on experimental results, the basic parameters for the technique were worked out accordingly.
Numerical Study Of Bubble Hydrodynamics For Gas-Solid Fluidized Beds With And Without Horizontal Tubes, Teklay W. Asegehegn, Hans Joachim Krautz
Numerical Study Of Bubble Hydrodynamics For Gas-Solid Fluidized Beds With And Without Horizontal Tubes, Teklay W. Asegehegn, Hans Joachim Krautz
The 13th International Conference on Fluidization - New Paradigm in Fluidization Engineering
The paper deals with numerical simulations using the Eulerian-Eulerian Two Fluid Model (TFM) of 2D gas-solid bubbling fluidized beds with and without immersed horizontal tubes. The bubble diameters and rise velocities obtained from the simulations presented good agreement when compared with experiments and correlations available in the literature. The presence of horizontal tubes inside the bed was found to be the main cause of bubble breakup, which eventually reduce the bubble diameter and rise velocity.
Biomass Gasification In Rotating Fluidized Bed, Mania Abdollahi, Christophe Guy, Jamal Chaouki
Biomass Gasification In Rotating Fluidized Bed, Mania Abdollahi, Christophe Guy, Jamal Chaouki
The 13th International Conference on Fluidization - New Paradigm in Fluidization Engineering
A steady-state mathematical model is developed for a rotating fluidized bed gasifier. Integrating reactor hydrodynamics with devolatilization kinetics, char gasification and combustion of both char and gas species; the model is used to present the gas-solid phenomena in novel reactor and investigates the reactor application in gasification processes. Model outputs are compared with experimental and simulation results of existing fluidized bed gasifier. It is observed that for the same equivalence ratio, the gasification process in RFB-SG is improved as a result of improved heat and mass transfer and gas-solid contact.
Direct Numerical Simulation Of Fluidized Bed With Immersed Boundary Method, Kenya Kuwagi, H. Utsunomiya, Y. Shimoyama, H. Hirano, T. Takami
Direct Numerical Simulation Of Fluidized Bed With Immersed Boundary Method, Kenya Kuwagi, H. Utsunomiya, Y. Shimoyama, H. Hirano, T. Takami
The 13th International Conference on Fluidization - New Paradigm in Fluidization Engineering
The applicability of the immersed boundary (IB) method, which is one of direct numerical simulations (DNS) for multiphase flow analyses, has been examined to simulate a fluidized bed. The volumetric-force type IB method developed by Kajishima et al. (2001) has been applied in the present work. While particle-fluid interaction force is calculated with the surface integral of fluid stress at the interface between particle and fluid in the standard IB method, the volume integral of interaction force is used in the volumetric-force type IB method. In order to validate the present simulation code, drag force and lift force firstly were …
Time-Averaged Modelling Of Cfbs – Analysis Of The Terms In The Momentum Equations, Sirpa Kallio, Maiju Seppälä, Veikko Taivassalo
Time-Averaged Modelling Of Cfbs – Analysis Of The Terms In The Momentum Equations, Sirpa Kallio, Maiju Seppälä, Veikko Taivassalo
The 13th International Conference on Fluidization - New Paradigm in Fluidization Engineering
The features of the terms in the time-averaged momentum equation for the solid phase are examined for three CFB units ranging from a laboratory-scale unit to a small CFB boiler. The CFD simulations were based on the Eulerian granular model of the Fluent software. The time-averaged terms calculated during the time dependent simulations are analysed and conclusions on their relative importance are drawn. An analysis of the terms in the vertical solids momentum equation in the central region of a CFB is presented.
Cfd Simulation Of The Reacting Flow Process Of Coal Pyrolysis To Acetylene In Hydrogen Plasma Downer Reactors, Binhang Yan, Yi Cheng, Yong Jin, Yi Cheng
Cfd Simulation Of The Reacting Flow Process Of Coal Pyrolysis To Acetylene In Hydrogen Plasma Downer Reactors, Binhang Yan, Yi Cheng, Yong Jin, Yi Cheng
The 13th International Conference on Fluidization - New Paradigm in Fluidization Engineering
A comprehensive computational fluid dynamics (CFD) model was established to describe the reacting flow of coal pyrolysis in hydrogen plasma downer reactors. The model predictions showed good accordance with the experimental results of the 2-MW and 5-MW pilot-plant reactors. The operating conditions were optimized to improve the 5-MW reactor performance.
Cfd-Dem Simulation Of Syngas-To-Methane Process In A Fluidized-Bed Reactor, Changning Wu, Dayong Tian, Yi Cheng
Cfd-Dem Simulation Of Syngas-To-Methane Process In A Fluidized-Bed Reactor, Changning Wu, Dayong Tian, Yi Cheng
The 13th International Conference on Fluidization - New Paradigm in Fluidization Engineering
The CFD-DEM coupled approach was used to simulate the gas-solid reacting flows in a lab-scale fluidized-bed reactor for syngas-to-methane (STM) process. The simulation results captured the major features of the reactor performance including unwanted defluidization. The fluidized-bed reactor showed good performances, such as in preventing the catalyst particles from overheating and sintering.
Cfd Simulation Of A Liquid-Fluidized Bed Of Binary Particles, Long Fan, John Grace, Norman Epstein
Cfd Simulation Of A Liquid-Fluidized Bed Of Binary Particles, Long Fan, John Grace, Norman Epstein
The 13th International Conference on Fluidization - New Paradigm in Fluidization Engineering
The ability of computational fluid dynamics to predict the expansion and segregation of a binary solids mixture in a liquid-solid fluidized bed is investigated. Unsteady laminar flow is simulated by a modified two-dimensional Eulerian-Eulerian model in Fluent 6.3. The predictions are compared with experimental results for binary particles in the same narrow (1.00-1.18 mm) size range, but with different densities, 1600 and 1900 kg/m3, fluidized by water (1). The voidages and heights of two layers which form, each dominated by one particle species, were found to be sensitive to small changes in particle properties (diameter, density, sphericity), as well as …
Fluidization Technology For Stable Startup Of Commercial Fcc Unit, Sung Won Kim, Gyung Rok Kim, Jae Wook Shin, Ik Sang Yoo, Hun Sik Kang, Sang Hoon Park
Fluidization Technology For Stable Startup Of Commercial Fcc Unit, Sung Won Kim, Gyung Rok Kim, Jae Wook Shin, Ik Sang Yoo, Hun Sik Kang, Sang Hoon Park
The 13th International Conference on Fluidization - New Paradigm in Fluidization Engineering
Conditions for maintaining good fluidization in the start-up of FCC have been determined. Catalyst defluidization and consequent catalyst losses from reactor cyclone are mainly affected by catalyst properties and stripper operating condition based on previous commercial startup experiences. Effect of fine catalyst contents on bed fluidity was determined. Bed fluidity in stripper was analyzed with slip velocity. Finally new startup guide was proposed and it was successfully applied to commercial FCC process of SK energy, Korea.
Performance Comparison Of Syngas Methanation On Fluidized And Fixed Bed Reactors, Yingli Wang, Jiao Liu, Qiang Li, Jian Yu, Fabing Su, Guangwen Xu
Performance Comparison Of Syngas Methanation On Fluidized And Fixed Bed Reactors, Yingli Wang, Jiao Liu, Qiang Li, Jian Yu, Fabing Su, Guangwen Xu
The 13th International Conference on Fluidization - New Paradigm in Fluidization Engineering
The performance was compared on Syngas Completely Methanation at atmospheric pressure on fluidized and fixed bed reactors. From space-time yield of CH4, coke content and hot spots of bed temperature, fluidized bed technology was demonstrated to be more applicable to Syngas Completely Methanation. Characterization results showed that different carbon deposition forms were presented on the two operation modes.
Film Coating Onto Cohesive Fine Particles By A Novel Rotating Fluidized Bed Coater, Tetsufumi Kondo, Hideya Nakamura, Tomohiro Iwasaki, Satoru Watano, Daisuke Iwamoto
Film Coating Onto Cohesive Fine Particles By A Novel Rotating Fluidized Bed Coater, Tetsufumi Kondo, Hideya Nakamura, Tomohiro Iwasaki, Satoru Watano, Daisuke Iwamoto
The 13th International Conference on Fluidization - New Paradigm in Fluidization Engineering
In this study, film coating onto cohesive fine particles was conducted by using a novel rotating fluidized bed coater (RFBC). In order to avoid the formation of agglomeration, baffle plates were equipped inside the RFBC. Coating experiments were conducted under various operating conditions and the coated particles were evaluated based on their physical properties. As a result, coated particles having extremely small degree of agglomeration and favorable prolonged release property of a tracer material could be obtained.
Syngas Production With A Dual Fluidized Bed Gasifier For Polygeneration, Uendo Lee, Young Doo Kim, Hyo Jae Jeong, In Soo Choi, Yeon Kyung Sung, Tae U Yoo, Jae Hun Song
Syngas Production With A Dual Fluidized Bed Gasifier For Polygeneration, Uendo Lee, Young Doo Kim, Hyo Jae Jeong, In Soo Choi, Yeon Kyung Sung, Tae U Yoo, Jae Hun Song
The 13th International Conference on Fluidization - New Paradigm in Fluidization Engineering
A pilot scale dual fluidized bed gasification system was developed for polygeneration with biomass. The gasification system is designed for supplying syngas for Fischer Tropsch (F-T) synthesis of bio-diesel and power generation with a syngas engine. Characteristics of biomass steam gasification were investigated in a lab scale bubbling fluidized bed, and hydrodynamics of a dual fluidized bed were investigated in a cold flow model. Based on the results from the lab scale test and cold flow model, a pilot scale dual fluidized bed gasifier was designed. In this paper, the developing process of the gasifier and preliminary results of system …
Fluidized Bed Combustion Of C1-C4 N-Alkanes, Jean-Philippe Laviolette, Gregory S. Patience, Jamal Chaouki
Fluidized Bed Combustion Of C1-C4 N-Alkanes, Jean-Philippe Laviolette, Gregory S. Patience, Jamal Chaouki
The 13th International Conference on Fluidization - New Paradigm in Fluidization Engineering
The non-premixed combustion of C1 to C4 n-alkanes was investigated inside a bubbling fluidized bed of inert sand particles at intermediate temperatures: 923 K (650oC) ≤ TB ≤ 1123 K (850oC). Lower (T1) and upper (T2) critical transition bed temperatures were measured for ethane, propane and n-butane as 923 K (650oC) and 1073 K (800oC), respectively. The values for methane were significantly higher with T1 = 1023 K (750oC) and T2 > 1123 K (850oC). Alkane conversion was accurately modeled with first-order kinetics and C2 to C4 n-alkanes combustion rates were characterized by a uniform Arrhenius expression: (. The reaction rate …
High Performance Computing: Clean Coal Gasifier Designs Using Hybrid Parallelization, Madhava Syamlal, C. Guenther, A. Gel, S Pannala
High Performance Computing: Clean Coal Gasifier Designs Using Hybrid Parallelization, Madhava Syamlal, C. Guenther, A. Gel, S Pannala
The 13th International Conference on Fluidization - New Paradigm in Fluidization Engineering
One of the targets for coal gasification in the near future is capturing 90% of the carbon with less than a 10% increase in cost of electricity. Aggressive goals like this will require innovative gasifier designs to reach the market place quickly, with less risk, and in an economically viable way. Researchers at the National Energy Technology Laboratory (NETL) are collaborating with industry, academia, and other national labs on multiphase computational models like the legacy code MFIX (Multiphase Flow with Interphase eXchange) which can help design, operate, and scale-up clean coal gasifiers to meet the challenges or a carbon constrained …
Fluidized Bed Gasification Of Biomass: A Substance Flow Analysis, Umberto Arena, Fabrizio Di Gregorio, Lucio Zaccariello, M.Laura Mastellone
Fluidized Bed Gasification Of Biomass: A Substance Flow Analysis, Umberto Arena, Fabrizio Di Gregorio, Lucio Zaccariello, M.Laura Mastellone
The 13th International Conference on Fluidization - New Paradigm in Fluidization Engineering
A natural biomass was fed in a pilot scale bubbling fluidized bed gasifier, having a maximum feeding capacity of 100kg/h. Measurements included the syngas composition, the mass flow rate and composition of entrained fines collected at the cyclone and purge material from the wet scrubber, and the bed material characterization. The performance of the whole gasification plant and of its specific components as well as the validity of some design solutions and operating criteria have been quantitatively assessed by means of a substance flow analysis.
One-Dimensional Modeling Of Oxy-Fuel Fluidized Bed Combustion For Co2 Capture, Sadegh Seddighi, David Pallarès, Filip Johnsson
One-Dimensional Modeling Of Oxy-Fuel Fluidized Bed Combustion For Co2 Capture, Sadegh Seddighi, David Pallarès, Filip Johnsson
The 13th International Conference on Fluidization - New Paradigm in Fluidization Engineering
A one-dimensional model has been developed with the aim of investigating oxyfuel circulating fluidized bed (CFB) combustion for CO2 capture with the main focus of assessing the heat balance of the CFB loop. For different oxygen concentrations in the gas flow fed to the furnace, the model calculates the external solids recirculation and the heat load in the furnace and in external particle coolers.
Numerical Computation Of Hydrodynamic Behavior Of Biomass Particles In Circulating Fluidized Beds, Afsin Gungor Dr.
Numerical Computation Of Hydrodynamic Behavior Of Biomass Particles In Circulating Fluidized Beds, Afsin Gungor Dr.
The 13th International Conference on Fluidization - New Paradigm in Fluidization Engineering
A model using a particle based approach is developed to accurately predict the hydrodynamic behavior of biomass particles in CFBs. Generally, the change in the pressure gradient with height in CFB riser is small. Numerical results are in good agreement with experiments, both in form and magnitude.
Tailored Synthesis Of Precipitated Magnesium Carbonates As Carbon-Neutral Filler Materials During Carbon Mineral Sequestration, Huangjing Zhao, Nathan Dadap, Ah-Hyung Alissa Park
Tailored Synthesis Of Precipitated Magnesium Carbonates As Carbon-Neutral Filler Materials During Carbon Mineral Sequestration, Huangjing Zhao, Nathan Dadap, Ah-Hyung Alissa Park
The 13th International Conference on Fluidization - New Paradigm in Fluidization Engineering
Predictions of global energy usage and demand trends suggest that fossil fuels will remain as the main energy source for the foreseeable future. Unfortunately, the increased amount of anthropogenic carbon emitted during the energy production leads to environmental issues, including climate change. Thus, reducing carbon dioxide emissions in order to stabilize atmospheric CO2 levels is crucial, and this would not be achieved without significant changes in the energy conversion processes and the implementation of carbon capture and storage (CCS) technologies. Currently, the geological storage of carbon dioxide is considered to be the most economical method of carbon sequestration, while mineral …
Towards A Theoretical Model Of Segregating Fluidization Of Two-Solid Beds, Bruno Formisani, Rossella Girimonte, Vincenzino Vivacqua
Towards A Theoretical Model Of Segregating Fluidization Of Two-Solid Beds, Bruno Formisani, Rossella Girimonte, Vincenzino Vivacqua
The 13th International Conference on Fluidization - New Paradigm in Fluidization Engineering
Fluidization of beds of two dissimilar solids is modelled by reworking the fundamental equations of fluidization. The approach followed illustrates the relationship between bed suspension and component segregation, as determined by differences in solid density and size. The need for empirical parameters is drastically reduced so that a unique representation of all types of mixture behaviour seems possible.
Cfd Simulation Of Pharmaceutical Particle Drying In A Bubbling Fluidized Bed Reactor, Jungkee Jang, Cezar Rosa, Hamid Arastoopour
Cfd Simulation Of Pharmaceutical Particle Drying In A Bubbling Fluidized Bed Reactor, Jungkee Jang, Cezar Rosa, Hamid Arastoopour
The 13th International Conference on Fluidization - New Paradigm in Fluidization Engineering
The bubbling fluidized bed flow regime is characterized by high heat and mass transfer rate and leads to a relatively short drying time. In this study, the gas-solid mixing and drying of pharmaceutical particles in a bubbling fluidized bed reactor was simulated using Computational Fluid Dynamics approach.
Experimental Quantification Of The Solids Flux In An Internally Circulating Fluidized Bed, Trevor D. Hadley, Christian Doblin, José Orellana, Kok-Seng Lim
Experimental Quantification Of The Solids Flux In An Internally Circulating Fluidized Bed, Trevor D. Hadley, Christian Doblin, José Orellana, Kok-Seng Lim
The 13th International Conference on Fluidization - New Paradigm in Fluidization Engineering
Internally circulating fluidized beds (ICFBs) have been applied to a number of processes and provide a means of exchanging the bed particles from one reaction chamber to the other. Fundamental to this system is a good knowledge of the solids circulation rate (SRR). This paper summarises experimental investigations conducted using a hot tracer technique to measure the solids recirculation flux through an ICFB with a reaction and heat exchange chamber. Possible predictive models which link the bed hydrodynamics to the SRR are also evaluated.
The Effect Of Gas Temperature And Velocity On Coal Drying In Fluidized Bed Dryer, Jaehyeon Park, Dowon Shun, Dal-Hee Bae, Sihyun Lee, Jeong Hak Seo, Jae Hyeok Park
The Effect Of Gas Temperature And Velocity On Coal Drying In Fluidized Bed Dryer, Jaehyeon Park, Dowon Shun, Dal-Hee Bae, Sihyun Lee, Jeong Hak Seo, Jae Hyeok Park
The 13th International Conference on Fluidization - New Paradigm in Fluidization Engineering
The objective of this research work is to develop fluidized bed coal dryer to overcome the disadvantages of low rank coal with high moisture such as low calorific values, costly transportation, high emissions of pollutants, and operational problem. In this paper, laboratory scale bubbling fluidized bed was used to dry high moisture, low-rank Indonesian coal to produce low moisture, high-rank coal. The effects of temperature, gas velocity and bed height to diameter ratio (L/D) on drying rate were studied to obtain information relating to optimum operating conditions. Coal characterizations (proximate analysis, ultimate analysis, Thermogravimetric Analysis (TGA), BET, Higher Heating Value …
Hydrodynamics Of Unconventional Fluidized Beds: Solids Flow Patterns And Their Influence On Mixing/Segregation Of A Large Flotsam Particle In A Bed Of Finer Solids, Roberto Solimene, Paola Ammendola, Giovanna Ruoppolo, Riccardo Chirone
Hydrodynamics Of Unconventional Fluidized Beds: Solids Flow Patterns And Their Influence On Mixing/Segregation Of A Large Flotsam Particle In A Bed Of Finer Solids, Roberto Solimene, Paola Ammendola, Giovanna Ruoppolo, Riccardo Chirone
The 13th International Conference on Fluidization - New Paradigm in Fluidization Engineering
Gross solids circulation of solid phase and its influence on mixing/segregation of a large flotsam particle in beds of finer solids in unconventional fluidized beds has been investigated. A tapered two-dimensional fluidization column and a fluidization column equipped with a diverging cone as gas distributor have been adopted. The hydrodynamics of the gas-solid suspension in the two apparatus has been qualitatively assessed by visual observation and the trajectories of the centre-of-gravity of large flotsam particles have been evaluated to assess the extent of mixing/segregation.
Penetration Of High Velocity Horizontal Gas Jets Into A Fluidized Bed At High Temperature, Cedric Briens, Feng Li, Franco Berruti, Jennifer Mcmillan
Penetration Of High Velocity Horizontal Gas Jets Into A Fluidized Bed At High Temperature, Cedric Briens, Feng Li, Franco Berruti, Jennifer Mcmillan
The 13th International Conference on Fluidization - New Paradigm in Fluidization Engineering
High velocity horizontal gas jets are applied to various industrial processes. In this work, a new thermal technique has been developed to measure the penetration length of horizontal gas jets. Experiments were conducted in a fluidized bed with a height of 1.23m and a rectangular cross section of 0.10m × 0.50m. The fluidized bed particles, which were either petroleum coke or sand, were heated by an in-bed electrical heater to temperatures between 300°C and 500°C. Cold gases, such as helium, nitrogen, carbon dioxide, were injected into the hot fluidized bed via a horizontal nozzle operating over a range of velocities. …
Evaluation Of Fluid Dynamics In A Hot And A Cold System Of Interconnecting Fluidised Beds, Fredrik Lind, Martin Seemann, Henrik Thunman
Evaluation Of Fluid Dynamics In A Hot And A Cold System Of Interconnecting Fluidised Beds, Fredrik Lind, Martin Seemann, Henrik Thunman
The 13th International Conference on Fluidization - New Paradigm in Fluidization Engineering
Operation controllability and fluid dynamics were evaluated in a system of interconnecting fluidised beds. Results indicate that the solid circulation is controllable and possible to determine from pressure measurements. Sufficient gas tightness of the loop-seals and flexibility in controlling of solid fluxes was indicated.
A Perspective On Development Of Novel Fluidized Bed Processes For A More Sustainable Global Future, John Grace
A Perspective On Development Of Novel Fluidized Bed Processes For A More Sustainable Global Future, John Grace
The 13th International Conference on Fluidization - New Paradigm in Fluidization Engineering
Faced with the need for transformative changes to solve global problems, fluidization could play a major role in contributing in areas like carbon capture, use of renewable resources, and recovery of valuable materials from waste streams. Some current examples are discussed where the fluidization community can help to find solutions
Investigation Of Reforming Activity And Oxygen Transfer Of Olivine In A Dual Circulating Fluidised Bed System With Regard To Biomass Gasification, Stefan Koppatz, Tobias Pröll, Christoph Pfeifer, Hermann Hofbauer
Investigation Of Reforming Activity And Oxygen Transfer Of Olivine In A Dual Circulating Fluidised Bed System With Regard To Biomass Gasification, Stefan Koppatz, Tobias Pröll, Christoph Pfeifer, Hermann Hofbauer
The 13th International Conference on Fluidization - New Paradigm in Fluidization Engineering
Natural olivine (Mg,Fe)2SiO4 is examined in a dual circulating fluidised bed (DCFB) reactor system of 120 kWth with regard to its reforming activity. Further, the oxygen transport capacity due to redox-cycling of the iron containing part of the olivine is considered. Based on a syngas composition derived from biomass gasification, the olivine is exposed to a surrogate gas mixture of H2, CO, CO2, CH4 and a tar compound (1-methylnaphthalene) at 850 °C. The results show the tar conversion at different tar loads. The investigations reveal that a low content of oxygen is transported by the olivine due to the redox-cycling …