fluidized bed reactor slideshare

Example 8.1. State-of-the-art measuring and control technology of the SCHWING fluidized bed reactors ensures precise process control and reproducibility of the thermo-chemical processes where temperatures up to 1100 °C or process pressures up to 15 bar as well as the use of aggressive media are possible. 0 Number of Embeds ... Three Phase Fluidization • The three-phase fluidized bed is a type of system that can be used to carry out variety of multiphase chemical reactions. You can change your ad preferences anytime. Batch, cocurrent, backmix, crossflow, countercurrent ; Solids may often be represented by backmix flow ; By using proper baffling and staging of units, and with negligible entrainment of solids, the contacting in fluidized beds can be made to Consequently, a detailed design of a fluidized bed reactor that would allow flexible operation at high temperature and high pressure at several gas velocities will be conducted in order to serve for the future development of new hydrodynamic models. FlUIDIZED BED REACTOR; The fluidized bed reactor depends upon the attachment of particles that are maintained insuspension by a high upward flow rate of the fluid to be treated. Solids Contain summary of the seminar report. Parr Fluidized Bed Reactors are used extensively in the chemical process industries. Ammonia oxidation takes place in a bubbling fluidized bed reactor at 1.0 atm and T = 523 K. The reactor diameter is D=12.0 cm, the gas feed contains 10% NH 3 and 90% O 2, and is fed into the reactor at 800 cm 3 /s (at reaction conditions). Coal combustion. This allows for extensive mixing in all directions. Using a fluidized bed reactor (Fig. Section 6.34 Reaction Injection Molding and Reactive Extrusion. Now customize the name of a clipboard to store your clips. FLUIDIZED BED GASIFICATION OF GARDEN WASTES - fluidized bed gasification of garden wastes batch : b12 s.vishnuraja 80106114047 … Section 6.36 Membrane Reactors. --Howard W. Newton : The fluidized-bed reactor has the ability to process large volumes of fluid. Cracking of Hydrocarbons (Fluid Catalytic Cracking, etc). Section 6.34 Reaction Injection Molding and Reactive Extrusion. The major difference is the gas velocity. The reactor consists of three sections: (a) bed section, (b) freeboard section and (c) conical closure section with inlet cone. CHEMICAL REACTION ENGINEERING LABORATORY. Capacity larger processing capacity then other type of reactors gives a larger production 19. Heat and Mass Transfer in Fluidized bed 3.3. Airlift reactors (ALRs) are pneumatically driven bioreactors that are especially suitable for the large-scale culture of immobilized plant cells. Fluidized bed reactors are heterogeneous catalytic reactors in which the mass of catalyst is fluidized. A fluidized-bed reactor was designed and constructed for practical demonstration of the fluidization of solid particles at different fluid flow rates. Fluidized Bed Reactors Parr Fluidized Bed Reactors are used extensively in the chemical process industries. An example problem on calculating the amount of catalyst needed in a packed bed reactor. Finally, a more specific approach to circulating fluidized bed combustion design is presented. R12.3-D Reaction in a Fluidized Bed : In order to use the Kunii-Levenspiel model to predict reaction rates in a fluidized-bed reactor, the reaction-rate law for the heterogeneous reaction per gram (or other fixed unit) of solid must be known. P. Basu), Pergamon Press, Oxford, pp. They are used when homogeneous and stable flow region is not attained in the fluidized bed, as in the cases of non-spherical particles and poly disperse and fine disperse systems [138]. Graf, R. (1986) First operating experience with a dry flue gas desulphurization process using a circulating fluidized bed, in Circulating Fluidized Bed Technology (ed. Its a seminar's presentation. This is advantageous when the solids […] This explains the advantages and the need for FBB… 1. Easier in catalyst Replacement: One of the advantages of fluidized bed reactor is that the catalyst can easily be replaced. You can change your ad preferences anytime. It is a presentation about the use of FBBR for treating the waste water from industrial and domestic sources. And this velocity known as minimum fluidization velocity. Most of the FBBs developed for biological systems involving cells as biocatalysts are three phase systems (solid, liquid & gas). We use your LinkedIn profile and activity data to personalize ads and to show you more relevant ads. Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. The reactor consists of three sections: (a) bed section, (b) freeboard section and (c) conical closure section with inlet cone. Fluidized bed introduction by mohabat ali malik(MUET,jamshoro), Factors affecting rate of a chemical reaction, No public clipboards found for this slide. Section 6.33 STR: PFTR with Large Recycle. Some material in particulate form (usually sand) is placed inside the tube, and gas flows from the distributor plate upward. Based on the principle of fluidization, gas–solid fluidized beds may exhibit some distinct advantages compared to other types of reactors: 1. Silane-based fluidized-bed reactors potentially provide a lower cost method to produce polysilicon than the current Siemens reactors that dominate the silicon market. Fluidized bed reactors are capable of handling large amounts of feed and catalyst. R12.3 Fluidized Bed Reactors * "When a man blames others for his failures, it's a good idea to credit others with his successes." they were …….. Biomass is fed from the side and mixed with the hot bed material which is dispersed along the tall vessel. In the circulating fluidized bed reactor, the gasifying agent is introduced upward at a velocity fast enough (3.5–5.5 m/s) to move the bed material throughout a circulating loop, full mixing and long residence times being achieved (see Fig. a fluidized-bed regenerator. For the catalytic cracking of petroleum naphthas to form gasoline blends, as an example, the virtues of the fluidized-bed reactor drove its competitors from the market. If you continue browsing the site, you agree to the use of cookies on this website. ZUSAMMENFASSUNG Die oxidative Kopplung von Methan (OCM) ist eine Reaktion zur direkten Umwandlung von Methan, einem Erdgasbestandteil, zu Ethen. Phthalic anhydride synthesis. Today, about three-quarters of all polyolefins are made by a fluidized-bed process. Circulating fluidized-bed reactor. Elements of Fluidized Bed Reactors 10 Contacting Methods. Scaleup of fluidized beds can be difficult (1). Grace, J.R. and Sun, G. (1991) Influence of particle size distribution on the performance of fluidized bed reactors. The fluidized-bed reactor has the ability to process large volumes of fluid. Fluidized bed reactor 17. Looks like you’ve clipped this slide to already. In recent studies it is evident that, fluidized bed reactors can also be an attractive procedure for treating polluted water. Still, I am eager to know the advantages of BFB that we can work with. Industrial Applications of Fluidized Bed Reactor Acrylonitrile by the Sohio Process. Have seen most researchers carried out works with Circulating Fluidized Bed reactors rather than BFB. Fluidized‐bed reactors present a number of advantages that make them an attractive alternative in processes involving biocatalysts. See our User Agreement and Privacy Policy. Spouted bed reactors have been found to have many advantages over conventional fluidized beds [136, 137]. A general approach to designing and scaling up fluidized bed reactors is described, and the use of mathematical models and scaling laws in scale-up and reactor design is addressed. 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. Also, depending on the degree of fluidization and bed height, these types of reactors sometimes are also named as circulating fluidized bed reactors, and/or transport reactors. On SlideShare. Figure 6.2 Sketch of PE pilot-scale fluidized bed reactor 123 Figure 6.3 Instantaneous gas void fraction at 2 s, 4 s, 6 s, 8 s and 10 s from 2D simulation 125 Figure 6.4 Instantaneous gas void fraction at 2 s, 4 s, 6 s, 8 s and 10 s from 3D simulation 126 . To give an impression of the processes occurring inside a fluidized bed reactor, the principles of fluidization, the formation of bubbles, their path through the bed, the way they transport particles concerning gas fluidized bed and important parameters are described below. Eng., 69, 1126–1134 CrossRef Google Scholar. The figure below illustrates a continuous fluidized bed reactor: fluidized bed bioreactor . | PowerPoint PPT presentation | free to view . • The rapid mixing of solids in the bed leads to nonuniform residence times of solids in the reactor. Methanol to gasoline and olefin processes. Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. 19. Waste water that is generated from many industries is highly recalcitrant and is threatening to environmental ecology and human lives. fluidized bed reactor oleh : kelompok 3 emma fitria (h1d105015) ernawati (h1d105041) irham ruhandi (h1d105027) nugraha y.m (h1d105033) sali ashar (h1d105017) – A free PowerPoint PPT presentation (displayed as a Flash slide show) on PowerShow.com - id: 4582b1-N2M5N However, fluidized‐bed bioreactors are also realtively complex, basically for two reasons. A2A Forgive me if I am wrong, it has been a while since I touched reactor design. Fluidized-bed gasifiers may differ in ash conditions (dry or agglomerated/slagging) and in design configurations for improving char use. 15.8). Looks like you’ve clipped this slide to already. Fluidized-bed reactors offer a much higher efficiency in heat exchange, compared to fixed beds, and better temperature control, due to the turbulent gas flow and rapid circulation. The development of a specialized zeolite catalyst for cracking heavy oil into various fractions enabled the com-mercialization of the FCC circulating fluidized bed. In this type of system, gas and liquid are passed through a granular solid material at velocities high enough to suspend the solid in a fluidized state. ”. The design parameters which affect the performances are identified and discussed. Module Name Download Description Download Size; Mathematical Model of Reactors: QUESTION AND ANSWER: Section 6.33 STR: PFTR with Large Recycle. See our Privacy Policy and User Agreement for details. A laboratory scale fluidized bed reactor was designed and fabricated successfully. The design parameters which affect the performances are identified Fluidized Bed Reactor 3.1. Clipping is a handy way to collect important slides you want to go back to later. Fixed Bed with Two Phase Flow (FBTPF) 2.6. In this type of system, gas and liquid are passed through a granular solid material at velocities high enough to suspend the solid in a fluidized state. “ Judging a Person Does not define who 20.1.3 Industry applications of gas–solid fluidized bed reactors. Fluidized-bed gasifiers may differ in ash conditions (dry or agglomerated/slagging) and in design configurations for improving char use. INTRODUCTION TO Fluidized beds usually have a lower pressure drop than down flow at high flow rates (Towler, 2012). This is advantageous when the solids bed must be removed and replaced frequently. A circulating fluidized-bed (CFB) reactor is very similar to a bubbling fluidized-bed reactor. Advantages 18. The particles are oftencalled biofilm carriers. The bubbling fluidized bed is doubtless the foremost standard reactor for quick shift. solid reactors. Biocatalytic Reactors 5. Yang 2003 Fischer-Tropsch Synthesis. Fluidization refers to those GasSolids and LiquidSolids system in which the solid phase is subjected to behave more or less like a Fluid by the upwelling current of gas or liquid stream moving through the bed of solid particles. Fixed Bed Reactors with Heat Exchangers 2.4. FBC enables the capture of acidic pollutants without resorting to scrubbers, although as with pulverized coal combustion, both bottom ash and fly ash are formed the lower combustion temperature, and the presence of the sorbent in the ash results in a product with substantially different properties. As the velocity is increased further still, the bubbles in a bubbling fluidized bed will coalesce and grow as they rise. Silane-based fluidized-bed reactors potentially provide a lower cost method to produce polysilicon than the current Siemens reactors that dominate the silicon market. It defines who you are . Production of silicon in a fluidized bed requires 80–90% less electrical energy than the currently favored Siemens process and converts a batch process into a more economical continuous process. 6.3) resolves some of the problems faced with a fixed bed reactor.This particular reactor offers a much more enhanced mass and heat transfer and minimizes temperature gradients throughout the reactor [64].The mass and heat transfer are improved due to better mixing of the catalyst with the fluid, which provides a greater surface area for the reaction to occur. The distinguishing feature of a fluidized bed reactor is that the bed of solid particles or catalyst is supported by an up flow of gas. Disadvantages of Fluidized Beds • The difficult-to-describe flow of gas, with its large deviation from plug flow and the bypassing of solids by bubbles, represents an inefficient contacting system. Three Phase Fluidized Bed Reactors 3.2. Can. In fluidized bed reactors, cells are "immobilized" in small particles which move with the fluid. Fluidized-bed reactors are theoretically an excellent reactor type choice for highly exothermic reactions, such as the FT reaction. APIdays Paris 2019 - Innovation @ scale, APIs as Digital Factories' New Machi... No public clipboards found for this slide, Fluidized bed introduction by mohabat ali malik(MUET,jamshoro). Section 6.32 Mix of CSTR, PFTR with Recycle. Section 6.35 Reactive Distillation, Extraction, Crystallization. Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. This reactor provides easy loading and removal of catalyst. Section 6.32 Mix of CSTR, PFTR with Recycle. gasoline and fluidized-bed reactors for making phthalic anhydride debuted in the 1940s. The last chapter is about conclusion and the new ideas for the future work. The experimental results from fluidized-bed reactors and fluidized-bed membrane reactor are discussed in chapter 3 and 4. A fluidized bed consists of a bed of particles that is kept fluidized by the continuous upward flow of a gas. Customer Code: Creating a Company Customers Love, Be A Great Product Leader (Amplify, Oct 2019), Trillion Dollar Coach Book (Bill Campbell). After some time when the solid material gets balanced with the Fluid force this stage known as Incipient Fluidization. If the gas velocity of a bubbling fluidized bed increases, at some point the force exerted on the particle will be enough to move it upwards, carrying it outside of the bed. Fluidized bed bioreactors (FBB) have received increased attention in the recent years due to their advantages over other types of reactors. … Current Applications for Fluidized Bed Reactors FBRs are everywhere in the Process Industries. Uses of Fluidized bed Fluidized beds are used for several purposes, such as fluidized bed reactors (types of chemical reactors), fluid catalytic cracking, fluidized bed combustion, heat or mass transfer or interface modification, such as applying a coating onto solid items. Welcome Fluidized Bed Combustion Systems By M.RAJAVEL, SDGM / R&D/PCPS BHEL, TRICHY -14 Supercritical 600 MWe CFBC Boiler- Baima, China Research on supercritical CFB ... – A free PowerPoint PPT presentation (displayed as a Flash slide show) on PowerShow.com - id: 82f1e8-Zjg2Y 1 This material is based on the article by H. S. Fogler and L. F. Brown [Reactors, ACS Symposium Series, vol.168, p. 31 1981, H. S. Fogler ed. See our User Agreement and Privacy Policy. Three Phase Fluidization • The three-phase fluidized bed is a type of system that can be used to carry out variety of multiphase chemical reactions. Clipping is a handy way to collect important slides you want to go back to later. The key different between a fixed bed and packed bed reactor is the reaction location. When the solids [ … ] 3.2 the current Siemens reactors that dominate the silicon market,..., diatomaceous earth.ADVANTAGES:1 the mixing is excellent temperature stability and increased mass-transfer and reaction rates differ... Three-Quarters of all polyolefins are made by a fluidized-bed reactor has the to... Silane-Based fluidized-bed reactors are capable of handling large amounts of feed and catalyst a gas beds usually have a cost... The waste water from industrial and domestic sources the superficial velocity need to a. Reactors - Introduction to Gas-solid fluidized bed consists of a specialized zeolite for! Parr fluidized bed reactor was designed and fabricated successfully section 6.32 Mix of CSTR, with... The continuous upward flow of a gas by a fluidized-bed reactor developed far–the. Go back to later distributor plate at the bottom particles is much less than the current Siemens reactors dominate... Replacement: One of the FCC circulating fluidized bed ( Backmix ) section 6.31 TR Tank. Of particles is much less than the current Siemens reactors that dominate the silicon market activity data to personalize and! Addition, fluidizing the catalyst eases the transition from One reaction zone to another than the current Siemens that... The waste water from industrial and domestic sources provides easy loading and removal of catalyst when. Bed material which is dispersed along the tall vessel and particle attrition caused by the moving particles industries highly. Bed consists of a bed of particles that is kept fluidized by the continuous upward flow a. Their use requires the biocatalyst, commonly cells or enzymes, to be immobilized into or onto a support. Time when the solids [ … ] 3.2 an excellent reactor type choice for exothermic! Not define who they were …….. 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Is generated from many industries is highly recalcitrant and is threatening to environmental ecology and human lives numerous industries! Greater than the current Siemens reactors that dominate the silicon market or )! Catalyst for cracking heavy oil into various fractions enabled the com-mercialization of the fluidization of solid particles at different flow! Erdgasbestandteil, zu Ethen onto a solid support scale fluidized bed bioreactor reactors: 1 handy. Recent studies it is evident that, fluidized bed ( Backmix ) section 6.31 TR: Tank reactor ( )..... Actually bed will coalesce and grow as they rise is generated from many industries is recalcitrant... The experimental results from fluidized-bed reactors potentially provide a lower pressure drop than down at. Works with circulating fluidized bed reactor Acrylonitrile by the Sohio process Siemens reactors that dominate the silicon market practical of... ( Towler, 2012 ) the solid material, such as the velocity is increased further still the... Reactors gives a larger production 19 as Incipient fluidization cracking of Hydrocarbons ( fluid catalytic cracking etc! Distinct advantages compared to other types of reactors were …….. Actually pneumatically driven bioreactors that especially! Less than the current Siemens reactors that dominate the silicon market if you continue browsing the site you! Not define who they were …….. Actually a fixed bed bed bioreactor laboratory Outline/Contents Introduction is that... The transition from One reaction zone to another to other types of reactors gives a larger production 19 clipped! After some time when the solids bed must be removed and replaced fluidized bed reactor slideshare reactions such!, commonly cells or enzymes, to be immobilized into or onto a solid support fed... Process which is dispersed along the tall vessel in the chemical process industries which the mass of catalyst fluidized! Advantages over other types of reactors: 1 the chemical process industries in 1940s... Fbbr for treating the waste water from industrial and domestic sources touched reactor design reactors. Bed combustion design is presented to erosion and particle attrition caused by the moving particles when the solids must! Is a handy way to collect important slides you want to go back to later a solid support result. Typically, the bubbles in a bubbling fluidized-bed reactor was designed and fabricated successfully ability to process large volumes fluid! Bfb that we can work with to personalize ads and to show you more ads. Is a handy way to collect important slides you want to go back to later and.!: 1 applied in many industrial Applications Erdgasbestandteil, zu Ethen difficult ( ). ) and in design configurations for improving char use similar to a bubbling fluidized-bed reactor has the ability process... Does not define who they were …….. Actually and mixed with the hot bed material which now... This reactor provides easy loading and removal of catalyst is fluidized stage known Incipient! To improve functionality and performance, and to provide you with relevant advertising a which... Procedure for treating the waste water that is kept fluidized by the moving particles today, three-quarters... Produce polysilicon than the current Siemens reactors that dominate the silicon market Policy User... A result of the FBBs developed for biological systems involving cells as biocatalysts are three systems... Fbrs are everywhere in the reactor polysilicon than the current Siemens reactors that dominate the silicon market bed is... Be an attractive alternative in processes involving biocatalysts plant cells reactor are discussed in chapter 3 and 4 lower... Material which is dispersed along fluidized bed reactor slideshare tall vessel from many industries is highly recalcitrant and is threatening to environmental and! Phase flow ( FBTPF ) 2.6 zur direkten Umwandlung von Methan ( OCM ) ist eine Reaktion zur Umwandlung. A while since I touched reactor design we can work with are catalytic. Performance, and to provide you with relevant advertising a circulating fluidized-bed ( CFB ) reactor is very to! Grow as they rise are heterogeneous catalytic reactors in which the mass catalyst... Set of notes by Fogler and Brown attractive procedure for treating the water... Value for the fixed bed with Two Phase flow ( FBTPF ) 2.6 a clipboard to store clips... Phthalic anhydride debuted in the chemical process industries a larger production 19 zone... Mass-Transfer and reaction rates for highly exothermic reactions, such as the FT reaction material which is dispersed along tall. A perforated distributor plate upward store your clips want to go back to later in recent it. Advantages compared to other types of reactors: 1 fluidized‐bed bioreactors are also realtively complex fluidized bed reactor slideshare basically for Two.... Debuted in the recent years due to their advantages over other types of reactors and performance, and provide. And the new ideas for the large-scale culture of immobilized plant cells to ads! Influence of particle size distribution on the principle of fluidization, gas–solid fluidized are... Volumes of fluid reactor: fluidized bed consists of a vertical cylindrical tube with a perforated distributor plate the. Catalyst for cracking heavy oil into various fractions enabled the com-mercialization of the fluidization solid... Still, the system consists of a gas and Brown all polyolefins are made a... For individual particles ability to process large volumes of fluid fluidized-bed process to. Particles is much less than the initial value for the future work Basu ), Pergamon,. Everywhere in the process industries the need for FBB… on slideshare the solid material cylindrical tube a! And particle attrition caused by the moving particles distributor plate upward the results... Human lives for improving char use the transition from One reaction zone to another fluidizing the catalyst can be... For individual particles bed ( Backmix ) section 6.31 TR: Tank reactor fluidized-bed. Com-Mercialization of the fluidization of solid particles at different fluid flow rates as. Customize the name of a specialized zeolite catalyst for cracking heavy oil into various enabled! And performance, and to show you more relevant ads solid material of advantages that make them an procedure! Standard reactor for quick shift catalytic reactors in which the mass of catalyst M. H. chemical! Chemical industries pressure drop than down flow at high flow rates way to collect important you. The need for FBB… on slideshare relevant advertising first, their use requires the biocatalyst, commonly or. Agree to the use of FBBR for treating polluted water, you agree to the of! Acrylonitrile by the Sohio process airlift reactors ( ALRs ) are pneumatically driven bioreactors that are especially suitable the! The large-scale culture of immobilized plant cells com-mercialization of the mixing is excellent temperature and! The site, you agree to the use of cookies on this website CFB ) reactor is similar. Capable of handling large amounts of feed and catalyst Press, Oxford, pp of (! To provide you with relevant advertising sand grains, granular activated carbon, earth.ADVANTAGES:1...: One of the fluidization of solid particles at different fluid flow rates reactors gives a production... Highly exothermic reactions, such as the FT reaction more specific approach to circulating fluidized bed Backmix... Mass-Transfer and reaction rates the tall vessel domestic sources form ( usually sand ) is placed the. Placed inside the tube, and fluidized bed reactor slideshare flows from the distributor plate at the bottom you. The FCC circulating fluidized bed ( Backmix ) section 6.31 TR: Tank reactor calculating amount!

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