Co-Processing Of Heavy Oil And Bio-Oil In A Continuous Mechanically Fluidized Reactor,
2011
The University of Western Ontario
Co-Processing Of Heavy Oil And Bio-Oil In A Continuous Mechanically Fluidized Reactor, Ryan Lance, Franco Berruti, Cedric Briens, Ran Xu, Louis Hagey, Will Rogers
Bioenergy III: Present and New Perspectives on Biorefineries
No abstract provided.
Antioxidant Activity Of Pyrolysis Oil Fractions From Different Biomass Feedstocks,
2011
University of Western Ontario
Antioxidant Activity Of Pyrolysis Oil Fractions From Different Biomass Feedstocks, Javeed Mohammad, Cedric Briens, Franco Berruti, Lorenzo Ferrante
Bioenergy III: Present and New Perspectives on Biorefineries
No abstract provided.
Stability Of Fluidized Bed Bio-Oils,
2011
University of Western Ontario
Stability Of Fluidized Bed Bio-Oils, Cedric Briens, Franco Berruti, Javeed Mohammad, Manjula Siriwardhana
Bioenergy III: Present and New Perspectives on Biorefineries
No abstract provided.
Bio-Oil From The Pyrolysis Of Canola, Brassica Napus, And Mustard, B. Carinata And B. Juncea, Straw: The Potential For Insecticide Development,
2011
University of Western Ontario
Bio-Oil From The Pyrolysis Of Canola, Brassica Napus, And Mustard, B. Carinata And B. Juncea, Straw: The Potential For Insecticide Development, Mohammad M. Hossain, Ian Scott, S.Q. Liu, B.D. Mcgarvey, Cedric Briens, Franco Berruti
Bioenergy III: Present and New Perspectives on Biorefineries
No abstract provided.
Modelling The Pyrolysis Of Lignin,
2011
Heriot-Watt University
Modelling The Pyrolysis Of Lignin, Raffaella Ocone, Cedric Briens, Franco Berruti, M Adam
Bioenergy III: Present and New Perspectives on Biorefineries
No abstract provided.
Investigating The Insecticidal Activity 1 Of Lignin, Cellulose And Hemicellulose Bio-Oil,
2011
University of Western Ontario
Investigating The Insecticidal Activity 1 Of Lignin, Cellulose And Hemicellulose Bio-Oil, Mohammad M. Hossain
Bioenergy III: Present and New Perspectives on Biorefineries
No abstract provided.
Isolation And Identification Of Active Components From Tomato Plant Bio-Oil,
2011
Univeristy of Western Ontario
Isolation And Identification Of Active Components From Tomato Plant Bio-Oil, Anna Majkrzak
Bioenergy III: Present and New Perspectives on Biorefineries
No abstract provided.
Pesticidal Properties And Chemical Composition Of Tomato Plant Bio-Oil,
2011
University of Western Ontario
Pesticidal Properties And Chemical Composition Of Tomato Plant Bio-Oil, Luis A. Caceres
Bioenergy III: Present and New Perspectives on Biorefineries
No abstract provided.
Evaluation Of A Lagrangian Discrete Phase Modeling Approach For Application To Industrial Scale Bubbling Fluidized Beds,
2011
Norwegian University of Science and Technology (NTNU), Norway
Evaluation Of A Lagrangian Discrete Phase Modeling Approach For Application To Industrial Scale Bubbling Fluidized Beds, Schalk Cloete, Shahriar Amini, S.T. Johansen, M. Braun, B. Popoff
10th International Conference on Circulating Fluidized Beds and Fluidization Technology - CFB-10
Industrial scale bubbling fluidized bed simulations were carried out within the Kinetic Theory of Granular Flows (KTGF). The KTGF was applied within two different modelling frameworks, the traditional Two Fluid Model (TFM) and a new approach in the form of the Dense Discrete Phase Model (DDPM), in order to identify any differences in performance. Only the DDPM was able to attain fully grid independent results for industrial scale 2D simulations. In fact, the performance was sufficiently good to enable the completion of reasonably affordable full 3D simulations. These simulations revealed some differences between 2D and 3D, but the global system …
Effects Of Tethering A Multistate Folding Protein To A Surface,
2011
Brigham Young University
Effects Of Tethering A Multistate Folding Protein To A Surface, Shuai Wei, Thomas A. Knotts Iv
Faculty Publications
Protein/surface interactions are important in a variety of fields and devices, yet fundamental understanding of the relevant phenomena remains fragmented due to resolution limitations of experimental techniques. Molecular simulation has provided useful answers, but such studies have focused on proteins that fold through a two-state process. This study uses simulation to show how surfaces can affect proteins which fold through a multistate process by investigating the folding mechanism of lysozyme (PDB ID: 7LZM). The results demonstrate that in the bulk 7LZM folds through a process with four stable states: the folded state, the unfolded state, and two stable intermediates. The …
Development Of A Phase Separation Model For A Biodiesel Reactor,
2011
University of Connecticut - Storrs
Development Of A Phase Separation Model For A Biodiesel Reactor, Lu Han
Honors Scholar Theses
The goal of this work is to establish a phase separation model for a biodiesel system, for the purpose of modeling a continuous flow multiphase biodiesel reactor. The Cahn-Hilliard theory is applied for a ternary system of two immiscible components and a third partially miscible component. The results of this work shows that phase field theory can be applied in phase modeling of a biodiesel system, and further investigations are required to develop a comprehensive biodiesel reactor model.
Comparison Of Entrainment Rate In Acrylonitrile Reactors Using Plant Data And Cfd Simulations,
2011
Ascend Performance Materials, LLC
Comparison Of Entrainment Rate In Acrylonitrile Reactors Using Plant Data And Cfd Simulations, S. Moffatt, S. Ramchandran, P. Zhao, K. Williams
10th International Conference on Circulating Fluidized Beds and Fluidization Technology - CFB-10
Accurate entrainment rates are important in fluidized bed reactors for several reasons, including determination of cyclone loadings and efficiencies, sizing of diplegs, and inputs to population balance models. Entrainment correlations exist in the literature and from other sources to predict entrainment rates from fluidized beds, but they can vary by orders of magnitude. In addition, many correlations do not take into account effects of internals which are present in many types of industrial reactors. A study was undertaken to better understand entrainment rates from Sohiotype acrylonitrile fluidized bed reactors containing catalyst classified as a Geldart type A powder. As part …
Cfd Simulation Of Co2 Sorption In A Circulating Fluidized Bed Using Deactivation Kinetic Model,
2011
Department of Chemical and Biological Engineering, Wanger Institute for Sustainable Energy Research (WISER), Illinois Institute of Technology
Cfd Simulation Of Co2 Sorption In A Circulating Fluidized Bed Using Deactivation Kinetic Model, Emadoddin Abbasi, Hamid Arastoopour
10th International Conference on Circulating Fluidized Beds and Fluidization Technology - CFB-10
The Computational Fluid Dynamics (CFD) approach was used to simulate sorption of CO2 using solid sorbents in the riser section of a circulating fluidized bed. The simulation results were compared with the experimental data of Korea Institute for Energy Research (KIER) for continuous CO2 sorption using potassium carbonate in a circulating fluidized bed system.
Critical Evaluation Of Euler-Euler And Euler-Lagrangian Modelling Strategies In A 2-D Gas Fluidized Bed,
2011
Carlos III University of Madrid, Spain
Critical Evaluation Of Euler-Euler And Euler-Lagrangian Modelling Strategies In A 2-D Gas Fluidized Bed, F. Hernández-Jiménez, J. R. Third, A. Acosta-Iborra, C. R, Müller
10th International Conference on Circulating Fluidized Beds and Fluidization Technology - CFB-10
Two-phase granular systems are commonly encountered in industry, and fluidized beds are particularly important due to their excellent heat and mass transfer characteristics. Here, we critically evaluate the differences between two modelling strategies, Euler-Euler and Euler-Lagrangian models. Euler-Euler simulations were performed using MFIX and an in-house code was used for Euler-Lagrangian simulations. A 2D bed of width, height and transverse thickness of respectively, 0.2 m, 0.5 m and 0.01 m, served as a test case. The settled bed height was H0 = 0.2 m. Particles of density ρ = 1000 kg/m³ and diameter dp = 1.2 mm were fluidized with …
Particle-Fluid Flow Simulations Of An Fcc Regenerator,
2011
CPFD Software, LLC
Particle-Fluid Flow Simulations Of An Fcc Regenerator, Sam Clark
10th International Conference on Circulating Fluidized Beds and Fluidization Technology - CFB-10
A particle-fluid flow simulation of a commercial-scale fluidized catalytic cracking unit has been conducted. The simulation was full-scale, three-dimensional, and with complex internal geometries. The focus of the computational model was to predict wear on internal structures. The geometry of the particle feed pipe was found to cause asymmetric flow of high-speed gas which led to significant wear.
Time-Resolved X-Ray Tomography Of A Fluidized Bed Of Geldart A Particles,
2011
Delft University of Technology
Time-Resolved X-Ray Tomography Of A Fluidized Bed Of Geldart A Particles, Robert Frank Mudde, Evert C. Wagner, J.R. Van Ommen, Q. Ricoux
10th International Conference on Circulating Fluidized Beds and Fluidization Technology - CFB-10
This paper discusses the influence of fines on the size of bubbles moving through a 23 cm ID fluidized bed of Geldart A particles imaged with an X-ray Tomographic Scanner. In earlier work [1], the bubble distribution in a fluidized bed of Geldart B particles was shown. The current study using Geldart A particles is more challenging to the reconstruction algorithm, since there are more bubbles, and they are smaller in size. We study the influence of adding fines (i.e. particles <= 45 micron) to the system. When adding a mass fraction of fines of 24%, we find a decrease of the average bubble of 40% of the size for the original powder, in line with earlier results from pressure probes and optical probes [2]. We find that the entire distribution of the bubble sizes shifts to smaller values.
A Study Of Solids And Gas Mixing In A Partitioned Fluidized Bed,
2011
Korea Institute of Energy Research, Daejon
A Study Of Solids And Gas Mixing In A Partitioned Fluidized Bed, Young-Ju Seo, Solim Kang, Seung-Yong Lee, Young Cheol Park, Ho-Jung Ryu, Gyoung Tae Jin, Jong-Ho Moon
10th International Conference on Circulating Fluidized Beds and Fluidization Technology - CFB-10
A partitioned fluidized bed gasifier has been developed for improving coal gasification performance. The basic concept is to divide a fluidized bed into two parts, a gasifier and a combustor, by a partition. Char is burnt in the combustor and generated heat is supplied to the gasifier by solid mixing. Therefore, solid mixing should be maximized whereas gas mixing between syngas and the combusted gas should be minimized. In this study, gas and solid mixing behaviors were verified in cold model acrylic beds. For monitoring solid mixing behavior, transient temperature trends in the beds were analyzed. A heat source and …
Cfd Modeling Of Fluidized Bed Reactor For The Synthesis Of Dimethyl Ether,
2011
RTI International
Cfd Modeling Of Fluidized Bed Reactor For The Synthesis Of Dimethyl Ether, Ranjeeth Kalluri, Nandita Akunuri, Aqil Jamal, Raghubir Gupta
10th International Conference on Circulating Fluidized Beds and Fluidization Technology - CFB-10
The syngas-to-DME reaction is highly exothermic, and the catalyst temperature window is very narrow. The fluidized-bed reactor is, therefore, an ideal choice to carry out these reactions. RTI is developing a circulating fluidized bed design for DME synthesis. This paper discusses a two-phase CFD model and optimization of the solids circulation rate.
A New Approach For Modeling Of A Fluidized Bed By Cfd-Dem,
2011
University of Tehran
A New Approach For Modeling Of A Fluidized Bed By Cfd-Dem, Shayan Karimipour, Navid Mostoufi, Rahmat Sotudeh-Gharebagh, H. Chizari
10th International Conference on Circulating Fluidized Beds and Fluidization Technology - CFB-10
Numerical studies of 3D cylindrical fluidized bed by means of combined computational fluid dynamics (CFD) and discrete element method (DEM) were carried out. For motion of particles, Newton's second law and 3D compressible Navier-Stokes equations in generalized curvilinear coordinates in its conservative form were used. Navier-Stokes equations were solved with high order compact finite difference scheme by fully implicit flux decomposition method. Non-reflecting boundary conditions (NRBC) were used for the outflow boundary. The convergence of this method, especially at high Reynolds number, is significantly better than the SIMPLE method.
Description Of Pressure Fluctuations In A Circulating Fluidized Bed By Statistical Analysis,
2011
Sasol Technology, South Africa
Description Of Pressure Fluctuations In A Circulating Fluidized Bed By Statistical Analysis, Adam Luckos, Roelof Coetzer, Andre Mostert
10th International Conference on Circulating Fluidized Beds and Fluidization Technology - CFB-10
In this paper we evaluate different methods for statistically analyzing the variability in pressure fluctuations measured at three locations in an 80-mm-ID, 5-m-tall CFB model operated with natural rutile particles and air at ambient conditions. The methods evaluated are the Shannon entropy, Fischer information matrix together with kernel density estimation, and an estimation of the magnitude of the pressure amplitudes. The accuracy of the different methods is estimated by the bootstrap method. We illustrate how informative statistics from these methods can be used to quantify the effect of the process variables on fluidization at different bed locations. Depending on the …
