simulation of a bubbling fluidized bed catalytic reactor
Airblown gasification of woody biomass in a bubbling fluidized bed gasifier
... municipal solid waste gasification with steam in a plasma gasification melting reactor Appl Energy 2012;98:219–29 [5] Munajat Nur Farizan, Catharina Erlich, Reza Fakhrai, Fransson Torsten H Influence of ... Char, tar and non-condensable gas are representative by-products from gasification Char is a residual solid material from devolatilization or pyrolysis of carbonaceous in biomass Tars are variable ... is particularly important in the air-blown gasification since it supplies necessary reaction heat An air-blown gasification system that uses air and biomass has the advantages of enhanced fuel...
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Parametric analysis of a circulating fluidized bed biomass gasifier for hydrogen production
... study was validated against the experimental data of Keawpanha et al [29] using Japan cedar as a biomass The gasifier was operated at the temperature of 700 C, S/B of one and steam temperature of ... material, which can be either sand or char; in addition, these apparatuses recirculate nearly all of the bed material and char with a cyclone separator A schematic diagram of a CFB biomass gasifier is ... Chutichai et al / Energy xxx (2015) 1e8 Table Proximate and ultimate analyses of the biomass Biomass Pine sawdusta Japan cedarb Proximate analysis (dry basis, wt.%) Volatile matter 79.5 Fixed carbon...
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Two dimensional numerical computation of a circulating fluidized bed biomass gasifier
... was divided into three stages including biomass pyrolysis, char–gas reactions, and gas-phase reaction At each stage, an empirical equation was estimated from experimental data to calculate carbon ... rate and particle size, biomass properties, air ratio, steam to biomass ratio, air to biomass ratio, and the superficial velocity The simulation model calculates the axial and radial profiles of ... 4258–4272 Ramzan, N., Ashraf, A. , Naveed, S., & Malik, A (2011) Simulation of hybrid biomass gasification using Aspen plus: A comparative performance analysis for food, municipal solid and poultry waste...
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Báo cáo vật lý: "Mixing Behavior of Binary Polymer Particles in Bubbling Fluidized Bed" doc
... number of sample number of particles in each sample fraction of the key component in a binary mixture pressure drop across the bed gas flow rare estimate of standard deviation of sample estimate of ... mixture as a measure of the quality of the mixture Thus a low standard deviation indicates a narrow spread in composition of samples and therefore predicts a good mixing The sample variance, S2 ... Letters ρba ρg ρp cross-sectional area of column the arithmetic mean of adjacent sieve size (particle size) mean sieve particle size m2 µm µm diameter of sphere having same volume as a particle...
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Study on the fate of metal elements from biomass in a benchscale fluidized bed gasifier
... Furusawa T, Kuchonthara P, et al Release behavior of tar and alkali and alkaline earth metals during biomass steam gasification Energy Fuels 2008;22(6):4235–9 [17] Sasaoka E, Hirano S, Kasaoka S, ... Leucaena leucocephala and sugarcane bagasse, fiber derived from Saccharum of cinarum, were gasified in a steam atmosphere using a bench-scale fluidized bed reactor The fate of trace elements (Ba, ... samples were subjected to elemental analysis using ICP–AES 2.5 Approach for elemental mass balance The input and output flow rate data can be used together to calculate a mass balance in a reactor...
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Simulation of a Multiple Input Multiple Output (MIMO) wireless system
... described as travelling along localized ray paths (i.e approximately a straight line) Therefore, ray tracing can be used as a method for the simulation and approximation of radio wave propagation ... the appropriate electric field value The ray list contains all of the data about rays propagating from a base station to a field point Each field point has a ray list associated with it A ray ... Fitzpatrick As can be seen, it is passed a particular base station, an image and its order, and also the field point As seen earlier a ray is made up of nodes, two of these nodes are always the base...
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Design and Simulation of A CMOS-MEMS Accelerometer
... ratio of parasitic capacitance and sensing capacitance can be measured, and the estimated value is calculated assuming a total sensing capacitance of 60fF Parasitic capacitance and mismatch of ... capacitors, Cd is about an order of magnitude larger than Cd_air, so approximately the total gap capacitance is equal to the sum of Cm_air and Cd_air, which is close to the gap capacitance of ... folded-cascode amplifier has good stability and reasonable gain with a single gain stage Hspice simulation shows a dc gain of 2800, with a open-loop -3dB bandwidth of 60kHz for a 2pF load capacitor A...
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Tài liệu Design And Simulation Of A Cmos-Mems Accelerometer doc
... ratio of parasitic capacitance and sensing capacitance can be measured, and the estimated value is calculated assuming a total sensing capacitance of 60fF Parasitic capacitance and mismatch of ... capacitors, Cd is about an order of magnitude larger than Cd_air, so approximately the total gap capacitance is equal to the sum of Cm_air and Cd_air, which is close to the gap capacitance of ... folded-cascode amplifier has good stability and reasonable gain with a single gain stage Hspice simulation shows a dc gain of 2800, with a open-loop -3dB bandwidth of 60kHz for a 2pF load capacitor A...
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Báo cáo khoa học: Structure, epitope mapping, and docking simulation of a gibberellin mimic peptide as a peptidyl mimotope for a hydrophobic ligand pot
... peptide-antibody recognition 11 Murata T, Fushinobu S, Nakajima M, Asami O, Sassa T, Wakagi T & Yamaguchi I (2002) Crystal structure of the liganded anti-gibberellin A4 antibody 4-B8(8) ⁄ E9 Fab fragment ... stage, the same protocol was applied by adding hydrogen bond restraints and dihedral angle restraints Additional NOE constraints were added in each round of calculations, and restraints that ... for v angles of serine residues The search ˚ area was set within 10 A of the centroid of heavy atoms of GA4 in the crystal structure Other calculation parameters were set to the default values...
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Case Study in Financial Modeling and Simulation of a Forestry Investment potx
... can span a lifetime of over 50 years Cash Flow Structure General for Projects initial cash outlay inflows from sale of product Particular to Forestry long term maintenance timed on-going outlays:thinnings, ... Wood growth is measured by the MAI: Mean Annual Increment; ‘the annual increase in cubic meters of harvestable timber per hectare’ The MAI is influenced byrelevant rainfall, soil fertility, ... fire, pests and diseases, unsuitable species, collateral damage at harvest Forestry Risks Timber return: inappropriate pruning and thinning, poor growth, timber usage and fashion changes Sovereign...
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Design and simulation of a shunt active filter pdf
... use of the automatic system based on active filtering From the analysis of the experimental data, in case of a nonlinear load of rectifier type, one may observe that there are different levels of ... controller Results obtained by numerical simulations The performance analysis of the system with active filtering was realized based on the data obtained by simulation in Matlab-Simulink environment ... ib [A] -10 10 ic [A] -10 a) b) Figure 6: Current waveforms of a nonlinear load represented by a controlled rectifier in case of a control angle equal with 30°, (a) and the harmonic spectrum of...
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KHÍ HÓA TẦNG SÔI Gasification of Biomass Using Fluidized Bed
... Bhattacharya, Fuel characteristics of gasified coconut shell in a fluidized and a spouted bed reactor Energy 26, pp 101– 110, 2001 S.Samy, Sadaka, A. E.Ghaly and M .A. Sabbah, Two phase biomass air-steam ... fundamentals of biomass gasification in dual fluidized bed. Fuel 86, pp 244–255,2007 A. Wan, G.Karim, R.Moghadam, S.Mohd.S,M Alias, Air Gasification of Agricultural Waste in a Fluidized Bed Gasifier:HydrogenProduction ... R.Moghadam, A. Alias, Air gasification of agricultural waste in a fluidized bed gasifier: hydrogen production performance, Energies 2, pp.258–268,2009 K.N.Sheeba , C.B.J.Sarat, and S.Jaisankar Air gasification...
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Development and biodynamic simulation of a detailed musculo skeletal spine model
... Nikhil Jagdish for his useful discussions and advices during the last two years The author is very grateful to Lakshmanan Kannan Anand Natara for his assistance and maintenance of LifeMOD software ... increase the levels of realism Especially, haptics has been investigated at length for medical education and surgical simulations, such as for surgical planning and laparoscopic surgical training ... devoid of muscles is validated against Panjabi et al (Panjabi et al., 1988, Panjabi et al., 1998) and colleagues’ experiments conducted using a bench-top trauma sled and isolated cervical spine...
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Modeling and simulation of a hybrid electric vehicle using MATLAB/Simulink and ADAMS
... simulate the hybrid vehicle Comparison of simulation results obtained from the MATLAB/ADAMS simulation platform and ADVISOR will be presented Chapter will contain comparative analysis of hybrid and ... Activating Mechanical Brakes The brake constant for this model is arbitrarily set as 200Nm, and can be modified if additional test data are available Modeling the mechanical brake interface with ... range of each is selected and utilized Notable current hybrid vehicle manufacturers are Toyota, Honda, and Nissan Toyota and Nissan both utilize a combination of parallel and series hybrid architecture...
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Tar abatement for clean syngas production during biomass gasification in a dual fluidized bed
... specifications: - DeTarCat FB (Fixed Bed) DeTarCat FB + CL (catalytically active inner tube) DeTarCat CL (Catalytically active Layer) DeTarCat CL + M (catalytically active monolith inside) In all cases, ... (C) catalytic layer (CL) and (D) catalytic layer with additional monolith (CL + M) Ceramic filter ; catalytic fixed bed ; catalytic layer ; catalytic foam ; ceramic caps (For interpretation of ... clean gas was around 0.25 g/Nm3 (N2 free, d.b.) A catalytically activated ceramic foam as additional reforming step for integration into the hollow-cylindrical space of the catalytically activated...
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Threedimensional fullloop simulation of a dual fluidizedbed biomass gasifier
... prescribed Table Model settings Bed material properties Bed material density (kg/m3) Mean diameter of bed material particles ðlmÞ; dp Size distribution of bed material particles Standard deviation of ... each computational particle is tracked The calculations of momentum, mass and energy transfer for the particle phase are on the basis of computational particles, rather than real particles Applying ... small external surface area, and therefore the adiabatic wall setting becomes a more reasonable option than the prescribed temperature setting As shown in Table 2, the mean diameter of biomass...
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Modeling and simulation of a downdraft biomass gasifier 1. Model development and validation
... consumption rate, the airflow rate can be calculated using global mass balance of produced gas, total air, wet biomass and ash For a given input of gas flow rate at gasifier exit and airflow rate, Eq (3) for ... of magnitudes [6] Non-equilibrium approaches use char conversion as a surface phenomena describing by char reactivity and global reactions of char–gas and gas–gas reactions An effective global ... the char reactivity factor, which represents the reactivity of char (or number of active sites on the char surface) and is a key parameter in simulation of fixed bed gasification As char burn-off...
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In situ catalytic conversion of tar using rice husk char/ash supported nickel–iron catalysts for biomass pyrolytic gasification combined with the mixing-simulation in fluidized-bed gasifier
... works as a carbon adsorbent to insert metal cations and tar 3.5 Mixing -simulation in fluidized bed gasifier (FBG) Gasification of biomass and wastes in FBG has advantages, since FBGs are capable of ... gasification and tar conversion Materials and methods The main experimental parameters of operating condition are shown in Table Fig 2A presents a schematic diagram of experimental apparatus, ... pyrolysis/gasification Although activated chars are extensively applied as carbon-based adsorbents to deal with various pollutants such as heavy metal wastewaters, they have been rarely fabricated into the catalysts...
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