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2010

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Articles 2431 - 2460 of 5381

Full-Text Articles in Engineering

Influence Of Process Parameters On Fluidised Bed Drying Of Powdered Materials, Piero Bareschino, Antonio Marzocchella, Piero Salatino May 2010

Influence Of Process Parameters On Fluidised Bed Drying Of Powdered Materials, Piero Bareschino, Antonio Marzocchella, Piero Salatino

The 13th International Conference on Fluidization - New Paradigm in Fluidization Engineering

The present study reports preliminary characterization about the fluidised bed drying of powdered materials. Tests were carried out in a Lexan® lab-scale fluidised bed with solids selected to effectively surrogate powders of interest in the manufacture of pharmaceuticals. The process was monitored to correlate the temperature and the flow rate of the fluidising gas, the temperature and the moisture level in the bed, the qualitative fluidisation patterns. Bed material was characterized to assess the modifications of the population of agglomerates as a function of the operating conditions.

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Heavy Metal Vaporization In Fluidized Bed Combustion Of Solid Waste And Coal, Q. Falcoz, J. Liu, Daniel J. Gauthier, G. Flamant, S. Abanades May 2010

Heavy Metal Vaporization In Fluidized Bed Combustion Of Solid Waste And Coal, Q. Falcoz, J. Liu, Daniel J. Gauthier, G. Flamant, S. Abanades

The 13th International Conference on Fluidization - New Paradigm in Fluidization Engineering

Solid samples, either of realistic waste model or coal, and spiked with Cd, Pb or Zn, were burned in an electrically-heated fluid bed reactor coupled to a customized ICP spectrometer, for on-line analysis of vaporized metals. For waste samples, a single kinetic law (whatever the metal), predicting the vaporization characteristic time and the time course of the metal concentration in the solid, was obtained. Tests with burning coal samples, spiked with Cd (at 820°C) and Zn (temperature range 680°C to 820°C), proved that this law is still valid, with a slight tendency to underestimation for both Cd and Zn vaporization …

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Novel Two-Interconnected Fluidized Bed System For Selective Solid Circulation, Ho-Jung Ryu, Jaehyeon Park, Dowon Shun, Seung-Yong Lee May 2010

Novel Two-Interconnected Fluidized Bed System For Selective Solid Circulation, Ho-Jung Ryu, Jaehyeon Park, Dowon Shun, Seung-Yong Lee

The 13th International Conference on Fluidization - New Paradigm in Fluidization Engineering

A novel two-interconnected fluidized bed system was developed to separate fine and coarse particles by means of particle size difference. Coarse (212~300 μm) and fine (63~106 μm) particles were separated perfectly using the solid separator. The effects of the fluidizing velocity, solid injection velocity, diameter of solid injection nozzle, and solid height on the solid separation rate were investigated. Moreover, continuous solid separation and circulation test up to 20 hours was performed to check feasibility of stable operation.

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Combustion Characteristics And Emission Of Hazardous Air Pollutants In Commercial Fluidized Bed Combustors For Sewage Sludge, Ha-Na Jang, Seong-Bum Park, Jeong-Hun Kim, Yong-Chil Seo May 2010

Combustion Characteristics And Emission Of Hazardous Air Pollutants In Commercial Fluidized Bed Combustors For Sewage Sludge, Ha-Na Jang, Seong-Bum Park, Jeong-Hun Kim, Yong-Chil Seo

The 13th International Conference on Fluidization - New Paradigm in Fluidization Engineering

Since the disposal of sewage sludge in ocean has been prohibited recently according to London Dumping Convention, technological need for treating sewage sludge safely and efficiently are getting increased in Korea. FBC (Fluidized Bed Combustor) technology has been selected and utilized as one of the alternatives because of combustible content in sludge, on-going process development to maintain the best combustion efficiency, and good heat recovery for energy utilization. In this paper, the process and combustion characteristics of commercially operating FBC incineration plants with the capacity ranging from 50 – 150 tons of sludge per day were investigated by comparing emission …

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Investigation Of Change Of Volumetric Flow In Fluidized-Bed Reactors, Andrés Mahecha-Botero, Franz Haseidl, Alexander Nguyen, Tingwen Li, John R. Grace May 2010

Investigation Of Change Of Volumetric Flow In Fluidized-Bed Reactors, Andrés Mahecha-Botero, Franz Haseidl, Alexander Nguyen, Tingwen Li, John R. Grace

The 13th International Conference on Fluidization - New Paradigm in Fluidization Engineering

Volumetric flow can change due to such factors as variation in the number of moles due to reaction, feed distribution, change of phase, membranes and changes in temperature and pressure. This change in volumetric flow was investigated by varying the fluidized-bed pressure in a two-dimensional steel column. Pressure was impulsively adjusted, showing large transient voids during the transitions after rapid growth of the existing bubbles. The effects of sudden depressurization as well as elevated pressure fluidization were also investigated.

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Attrition Of Bed Materials And Fuel Pellets For Fluidized Bed Gasification Application, P. Ammendola, R. Chirone F. Miccio, G. Ruoppolo, Fabrizio Scala May 2010

Attrition Of Bed Materials And Fuel Pellets For Fluidized Bed Gasification Application, P. Ammendola, R. Chirone F. Miccio, G. Ruoppolo, Fabrizio Scala

The 13th International Conference on Fluidization - New Paradigm in Fluidization Engineering

This paper reports on a study of the attrition/fragmentation behavior of different bed materials and fuel pellets for application in fluidized bed gasification. Three different bed materials displaying catalytic activity, namely fresh and sintered dolomite and a Ni-alumina catalyst, were tested for their resistance to fragmentation and attrition in fluidized bed. The fresh dolomite displayed extensive particle breakage upon calcination and a large production of attrited fines during fluidized bed operation. The other two materials were much more resistant to attrition and appeared to be suitable for further long-term operation testing. The attrition/fragmentation resistance of three pelletized fuels, one based …

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Shear-Assisted Fluidized Bed Powder-Coating, Piero Bareschino, Francesco Pepe, Piero Salatino May 2010

Shear-Assisted Fluidized Bed Powder-Coating, Piero Bareschino, Francesco Pepe, Piero Salatino

The 13th International Conference on Fluidization - New Paradigm in Fluidization Engineering

This study addresses a novel concept of dense-fluidized bed coating of objects where the effectiveness of coating is promoted by the intentional and controlled establishment of shear flow around the object. The fluidized powder is sheared by the controlled oscillatory motion of the object with respect to the fluidized bed. The proof-of-concept is given with experiments carried out using a commercial powder specifically manufactured for dry coating applications in fluidized bed. Systematic analysis of the effect of different levels of shear rate on particle mobility/adhesion and effectiveness of coverage was performed. A simple descriptive model has been developed to provide …

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Heat Transfer To Immersed Cooling Tubes And Particles In A Fluidized Bed Reactor, Y. Kobayashi, Y. Mori, A. Goto, H.T. Bi J.R. Grace May 2010

Heat Transfer To Immersed Cooling Tubes And Particles In A Fluidized Bed Reactor, Y. Kobayashi, Y. Mori, A. Goto, H.T. Bi J.R. Grace

The 13th International Conference on Fluidization - New Paradigm in Fluidization Engineering

A simple heat transfer model is utilized to determine the heat transfer coefficients for multiple tubes immersed in an industrial fluidized bed reactor supporting an exothermic reaction. From the temperatures at their outlets, superheating occurs in some blocks of tubes, but not in others. A four-zone heat transfer model is then used to evaluate the axial and lateral temperature differences due to the existence of a bottom un-cooled entrance zone and two cooled zones, corresponding to the regions where superheating does and does not occur.

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Heat Recovery From Melted Blast Furnace Slag Using Fluidized Bed, Tadaaki Shimizu, Daisuke Haga, Go Mikami, Takayuki Takahashi, Kenji Horinouchi May 2010

Heat Recovery From Melted Blast Furnace Slag Using Fluidized Bed, Tadaaki Shimizu, Daisuke Haga, Go Mikami, Takayuki Takahashi, Kenji Horinouchi

The 13th International Conference on Fluidization - New Paradigm in Fluidization Engineering

A novel fluidized bed system is proposed to recover heat from melted blast furnace slag. The melted slag is fed into a fluidized bed of crushed solid slag particles. The heat of slag solidification is transported to immersed heat transfer surface through fluidizing particles. The solid slag clumps, which consist of solidified slag and bed material, are removed from the bottom. A part of the slag clumps are crushed and recycled into the bed as bed material. In the present article, conceptual design of arrangement of heat transfer surface was carried out. Fundamental study of heat recovery from melted wax …

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Modeling Of Mass Loss Of Char Particles During Combustion And Interaction With Inert Material, Piotr Pelka, Jacek Leszczynski May 2010

Modeling Of Mass Loss Of Char Particles During Combustion And Interaction With Inert Material, Piotr Pelka, Jacek Leszczynski

The 13th International Conference on Fluidization - New Paradigm in Fluidization Engineering

The inspiration for this research was the numerical simulation of mass loss of char particles during its combustion in a CFB boiler. The mass loss was presented as the superposition of two separate processes i.e. combustion and surface erosion. The values obtained by the model and experimental data show a good level of conformity.

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Hydrodynamics Of A Spout-Fluid Bed With An Enlarged Column For Fine Particles, Jian Xu, Lei Gong, Xiaojun Bao Dr., Weisheng Wei May 2010

Hydrodynamics Of A Spout-Fluid Bed With An Enlarged Column For Fine Particles, Jian Xu, Lei Gong, Xiaojun Bao Dr., Weisheng Wei

The 13th International Conference on Fluidization - New Paradigm in Fluidization Engineering

In order to improve the spoutability for fine particles, a new type of spout-fluid bed with an enlarged column section was proposed. Comparison of flow regime maps for the new design with a conventional spout-fluid bed showed that the range of stable spouting regime was extended when an enlarged column section was employed.

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A Conical Spouted Bed Reactor For The Valorisation Of Waste Tires, Gartzen Lopez, Maider Amutio, Gorka Elordi, Maite Artetxe, Haritz Altzibar, Martin Olazar May 2010

A Conical Spouted Bed Reactor For The Valorisation Of Waste Tires, Gartzen Lopez, Maider Amutio, Gorka Elordi, Maite Artetxe, Haritz Altzibar, Martin Olazar

The 13th International Conference on Fluidization - New Paradigm in Fluidization Engineering

A pilot plant provided with a conical spouted bed reactor has been used for the valorisation of waste tires by thermal pyrolysis in continuous mode. The effect of pyrolysis temperature on product distribution and properties has been studied in the temperature range from 425 to 600 ºC. This variable has proven to have an important effect on product distribution. Thus, pyrolysis oil yield was reduced from 64.3 wt% at 425 ºC to 55.9 wt% at 600 ºC. However, the quality of carbon black was improved operating at high temperatures (increasing BET surface area values). High yields of certain interesting chemicals …

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Particle Segregation In Tapered Fluidized Beds, T. M. Gernon, Mark A. Gilbertson, R.S.J. Sparks May 2010

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.

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Numerical And Experimental Steady State Flow And Heat Transfer In A Continuous Spouted Bed, Cezar A. Rosa, José T. Freire, Hamid Arastoopour May 2010

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.

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Numerical Study Of Bubbling Fluidized Beds: Influence Of Immersed Tubes, Extraction Methods And Averaging Periods, Matthias Schreiber, Teklay Weldeabzgi Asegehegn, Hans Joachim Krautz May 2010

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.

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Basic Study For Coal Moisture Control Integrating Pneumatic Classification Technique, Zhou-En Liu, Yin Wang, Yajun Tian, Yimin Xie, Wenfeng Ji, Guangwen Xu May 2010

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.

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Numerical Study Of Bubble Hydrodynamics For Gas-Solid Fluidized Beds With And Without Horizontal Tubes, Teklay W. Asegehegn, Hans Joachim Krautz May 2010

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.

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Biomass Gasification In Rotating Fluidized Bed, Mania Abdollahi, Christophe Guy, Jamal Chaouki May 2010

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.

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Direct Numerical Simulation Of Fluidized Bed With Immersed Boundary Method, Kenya Kuwagi, H. Utsunomiya, Y. Shimoyama, H. Hirano, T. Takami May 2010

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 …

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Time-Averaged Modelling Of Cfbs – Analysis Of The Terms In The Momentum Equations, Sirpa Kallio, Maiju Seppälä, Veikko Taivassalo May 2010

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.

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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 May 2010

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.

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Cfd-Dem Simulation Of Syngas-To-Methane Process In A Fluidized-Bed Reactor, Changning Wu, Dayong Tian, Yi Cheng May 2010

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.

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Cfd Simulation Of A Liquid-Fluidized Bed Of Binary Particles, Long Fan, John Grace, Norman Epstein May 2010

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 …

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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 May 2010

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.

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Performance Comparison Of Syngas Methanation On Fluidized And Fixed Bed Reactors, Yingli Wang, Jiao Liu, Qiang Li, Jian Yu, Fabing Su, Guangwen Xu May 2010

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.

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Film Coating Onto Cohesive Fine Particles By A Novel Rotating Fluidized Bed Coater, Tetsufumi Kondo, Hideya Nakamura, Tomohiro Iwasaki, Satoru Watano, Daisuke Iwamoto May 2010

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.

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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 May 2010

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 …

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Fluidized Bed Combustion Of C1-C4 N-Alkanes, Jean-Philippe Laviolette, Gregory S. Patience, Jamal Chaouki May 2010

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 …

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High Performance Computing: Clean Coal Gasifier Designs Using Hybrid Parallelization, Madhava Syamlal, C. Guenther, A. Gel, S Pannala May 2010

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 …

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Fluidized Bed Gasification Of Biomass: A Substance Flow Analysis, Umberto Arena, Fabrizio Di Gregorio, Lucio Zaccariello, M.Laura Mastellone May 2010

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.

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