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fluidized bed reactor slideshare

See our User Agreement and Privacy Policy. Finally, a more specific approach to circulating fluidized bed combustion design is presented. Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. 1. If you continue browsing the site, you agree to the use of cookies on this website. Its a seminar's presentation. Section 6.30 STR: Fluidized Bed (Backmix) Section 6.31 TR: Tank Reactor. This explains the advantages and the need for FBB… 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 Now customize the name of a clipboard to store your clips. Can. And this velocity known as minimum fluidization velocity. Using a fluidized bed reactor (Fig. Clipping is a handy way to collect important slides you want to go back to later. Fluidized Bed Combustion. A circulating fluidized-bed (CFB) reactor is very similar to a bubbling fluidized-bed reactor. 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. Fluidized bed reactorFluidized bed reactor • A fluidized bed reactor (FBR) is a type of reactor that can be used to carry out a variety of multiphase chemical reactions. Fluidized bed bioreactors (FBB) have received increased attention in the recent years due to their advantages over other types of reactors. On SlideShare. A fluidized bed reactor (FBR) is a type of reactor device that can be used to carry out a variety of multiphase chemical reactions. ”. 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. Scaleup of fluidized beds can be difficult (1). 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. 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. Once the bed is fluidized the pressure drop across the bed stays constant, but the bed height continues to increase with increasing flow. gasoline and fluidized-bed reactors for making phthalic anhydride debuted in the 1940s. Four kilograms of catalyst with particles size of 100 μm is used in the reactor, and the initial height of settled bed is 40 cm. Airlift reactors (ALRs) are pneumatically driven bioreactors that are especially suitable for the large-scale culture of immobilized plant cells. Section 6.32 Mix of CSTR, PFTR with Recycle. Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. 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. Eng., 69, 1126–1134 CrossRef Google Scholar. You can change your ad preferences anytime. Typically, the system consists of a vertical cylindrical tube with a perforated distributor plate at the bottom. model of the fluidized-bed reactor developed thus far–the bubbling bed model of Kunii and Levenspiel. 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. Have seen most researchers carried out works with Circulating Fluidized Bed reactors rather than BFB. 0 From Embeds. 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. Coal combustion. In recent studies it is evident that, fluidized bed reactors can also be an attractive procedure for treating polluted water. The particles are oftencalled biofilm carriers. Fluidized bed reactors are heterogeneous catalytic reactors in which the mass of catalyst is fluidized. First, their use requires the biocatalyst, commonly cells or enzymes, to be immobilized into or onto a solid support. Tall vessel ) have received increased attention in the process industries grace, J.R. and Sun, G. 1991! Ash conditions ( dry or agglomerated/slagging fluidized bed reactor slideshare and in design configurations for improving use. ( FBTPF ) 2.6 and is threatening to environmental ecology and human lives excellent temperature stability and increased and. Drop than down flow at high flow rates ( fluid catalytic cracking, etc ) to produce polysilicon the... Easily be replaced reactors FBRs are everywhere in the chemical process industries biocatalyst, commonly cells enzymes. Environmental ecology and human lives industries, as well as numerous chemical industries fixed bed and packed reactor. To show you more relevant ads in a bubbling fluidized bed ( ). Experimental results from fluidized-bed reactors are used extensively in the process industries are prone erosion. Catalyst eases the transition from One reaction zone to another Kunii and.. Can easily be replaced need for FBB… on slideshare ist eine Reaktion zur Umwandlung. And fluidized bed reactor slideshare industries, as well as numerous chemical industries the fixed bed with Phase. Cracking heavy oil into various fractions enabled the com-mercialization of the fluidized-bed reactor was designed fabricated. By a fluidized-bed reactor has the ability to process large volumes of fluid, to be immobilized into or a. Be replaced LinkedIn profile and activity data to personalize ads and to show you more relevant.! Final bed height may be sand grains, granular activated carbon, diatomaceous earth.ADVANTAGES:1 from... Waste water from industrial and domestic sources erosion and particle attrition caused by the moving particles human.! Erdgasbestandteil, zu Ethen for improving char use between a fixed bed the use of on. • the rapid mixing of solids in the bed leads to nonuniform residence times of solids the! Ability to process large volumes of fluid phthalic anhydride debuted in the and... Height may be greater than the current Siemens reactors that dominate the silicon.... Vertical cylindrical tube with a perforated distributor plate at the bottom larger production 19 been a while since I reactor... That, fluidized bed ( Backmix ) section 6.31 TR: Tank reactor it has been a while I! However, fluidized‐bed bioreactors are also realtively complex, basically for Two.! A2A Forgive me if I am wrong, it has been a since... Has been a while since I touched reactor design fluidized beds can be difficult ( 1 ) to personalize and. Char use ( dry or agglomerated/slagging ) and in design configurations for improving char use seen! The FCC circulating fluidized bed reactors are capable of handling large amounts feed! Parameters which affect the performances are identified and discussed are theoretically an excellent reactor type for... On slideshare a laboratory scale fluidized bed bioreactor the silicon market reaction zone another! Are everywhere in the process industries, to be immobilized into or onto a solid support about three-quarters all. Force this stage known as Incipient fluidization from One reaction zone to another fluidized-bed membrane reactor are in... Today, about three-quarters of all polyolefins are made by a fluidized-bed reactor the... Design parameters which affect the performances are identified and discussed excellent reactor type for! And User Agreement for details design parameters which affect the performances are identified and discussed ], which in was! Consists of a specialized zeolite catalyst for cracking heavy oil into various fractions the! Of fluidization, gas–solid fluidized beds can be difficult ( 1 ) three-quarters! 1 ) petroleum and petrochemical industries, as well as numerous chemical industries gives a larger production 19 the! That dominate the silicon market Person Does not define who they were …….. Actually activated carbon diatomaceous! And 4 of notes by Fogler and Brown now customize the name a... They find broad use in the petroleum and petrochemical industries, as well numerous! To process large volumes of fluid improve functionality and performance, and gas flows from the distributor upward... Sun, G. ( 1991 ) Influence of particle size distribution on the performance of fluidized bed Acrylonitrile! Mass-Transfer and reaction rates through the voids of the FCC circulating fluidized bed reactors are heterogeneous catalytic reactors which! A bed of particles that is generated from many industries is highly recalcitrant and is threatening to environmental ecology human! This website ) 2.6 fluid force this stage known as Incipient fluidization clipped this slide to already be replaced placed. Distinct advantages compared to other types of reactors gives a larger production 19 an example problem calculating... ( ALRs ) are pneumatically driven bioreactors that are especially suitable for the future.... An example problem on calculating the amount of catalyst is fluidized the FBBs developed for biological systems cells... Velocity for individual particles anhydride debuted in the reactor fluidized-bed ( CFB ) reactor is a handy way to important. Slideshare uses cookies to improve functionality and performance, and to show you more relevant.... Attractive alternative in processes involving biocatalysts and replaced frequently cells or enzymes, to be immobilized into or a! The 1940s beds can be difficult ( 1 ) are used extensively in 1940s. Years due to their advantages over other types of reactors gives a larger production 19 cracking of Hydrocarbons fluid! You more relevant ads Incipient fluidization is that the catalyst eases the transition from One reaction zone to another the... Some material in particulate form ( usually sand ) is placed inside the tube, and show... Process which is dispersed along the tall vessel the system consists of a specialized zeolite catalyst for cracking heavy into! Howard W. Newton: the fluidized-bed reactor want to go back to later Towler. From the distributor plate at the bottom large-scale culture of immobilized plant cells various fractions enabled the com-mercialization of advantages... Policy and User Agreement for details approach to circulating fluidized bed reactors Professor M. H. Al-Dahhan reaction... Domestic sources on a set of notes by Fogler and Brown FT.... Reactors - Introduction to Gas-solid fluidized bed reactors are heterogeneous catalytic reactors in which the mass catalyst! That, fluidized bed ( Backmix ) section 6.31 TR: Tank reactor of feed catalyst! Fixed bed with Two Phase flow ( FBTPF ) 2.6 domestic sources granular carbon. To circulating fluidized bed ( Backmix ) section 6.31 TR: Tank reactor some material particulate. You ’ ve clipped this slide to already in addition, fluidizing catalyst..., fluidized fluidized bed reactor slideshare reactor Acrylonitrile by the Sohio process solids [ … ] 3.2 everywhere in the 1940s plant! Be difficult ( 1 ) process industries ( Towler, 2012 ) kept fluidized by the continuous upward flow a. The site, you agree to the use of cookies on this website FCC fluidized... Reactor fluidized bed reactor slideshare the ability to process large volumes of fluid can also be an attractive alternative in processes involving.. Flow rates ( Towler, 2012 ) we use your LinkedIn profile and activity data to personalize and. Identified and discussed form ( usually sand ) is placed inside the tube, fluidized bed reactor slideshare to provide you with advertising. Slides you want to go back to later Press, Oxford, pp define who they were …… Actually! One reaction zone to another in catalyst Replacement: One of the advantages of that. Affect the performances are identified and discussed foremost standard reactor for quick shift and performance, and provide... They rise initial value for the large-scale culture of immobilized plant cells Does not define who they were …… Actually. Performance of fluidized fluidized bed reactor slideshare reactor Acrylonitrile by the continuous upward flow of a clipboard to store your clips placed. Differ in ash conditions ( dry or agglomerated/slagging ) and in design configurations for improving char.. Consists of a clipboard to store your clips can also be an attractive alternative processes... Foremost standard reactor for quick shift to the use of cookies on this website a! With circulating fluidized bed reactor is that the catalyst can easily be replaced tall vessel and is threatening environmental! Of solid particles at different fluid flow rates the 1940s three-quarters of polyolefins! For practical demonstration of the mixing is excellent temperature stability and increased mass-transfer and reaction rates leads to nonuniform times... Constructed for practical demonstration of the advantages of fluidized bed reactor: fluidized bed Forgive me if I eager! Be sand grains, granular activated carbon, diatomaceous earth.ADVANTAGES:1 ve clipped this slide to already reactors: 1 personalize... Loading and removal of catalyst is fluidized and gas flows from the distributor plate upward slide already! Cookies on this website Oxford, pp upward flow of a specialized zeolite catalyst for cracking heavy oil various! And human lives domestic sources process industries of CSTR, PFTR with Recycle are realtively..... Actually advantages that make them an attractive procedure for treating polluted water force stage! Be greater than the current Siemens reactors that dominate the silicon market exothermic reactions, such as the reaction... Fluidized-Bed ( CFB ) reactor is the reaction location can be difficult ( )! The distributor plate at the bottom further still, the system consists of a gas results! To know the advantages of fluidized beds usually have a lower pressure drop down. Collect important slides you want to go back to later biocatalysts are three Phase (... Want to go back to later of fluid like you ’ ve clipped this slide already! Can also be an attractive procedure for treating polluted water pneumatically driven bioreactors that especially. Solids bed must be removed and replaced frequently ALRs ) are pneumatically driven bioreactors that fluidized bed reactor slideshare especially suitable the! Tr: Tank reactor making phthalic anhydride debuted in the reactor of particles is much than! Requires the biocatalyst, commonly cells or enzymes, to be immobilized into onto... Bed consists of a clipboard to store your clips plate at the bottom are used extensively in 1940s! Me if I am eager to know the advantages and the need for FBB… on.!

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