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- The 14th International Conference on Fluidization – From Fundamentals to Products (132)
- The 12th International Conference on Fluidization - New Horizons in Fluidization Engineering (131)
- The 13th International Conference on Fluidization - New Paradigm in Fluidization Engineering (122)
- 10th International Conference on Circulating Fluidized Beds and Fluidization Technology - CFB-10 (95)
- Fluidization XV (72)
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- BioEnergy IV: Innovations in Biomass Conversion for Heat, Power, Fuels and Chemicals (51)
- Bioenergy - I: From Concept to Commercial Processes (49)
- Bioenergy - II: Fuels and Chemicals from Renewable Resources (49)
- CO2 Summit: Technology and Opportunity (40)
- Bioenergy III: Present and New Perspectives on Biorefineries (38)
- Biorefinery I: Chemicals and Materials From Thermo-Chemical Biomass Conversion and Related Processes (25)
- 5th International Congress on Green Process Engineering (GPE 2016) (24)
- Biochemical and Molecular Engineering XXI (5)
- Regulatory Sciences for Biologics and Vaccines: Accelerating Development and Enabling Manufacturing Innovation (1)
- File Type
Articles 421 - 450 of 834
Full-Text Articles in Chemical Engineering
The Development Of A Novel Cu-Mn Oxygen Carrier For The Chemical Looping Gasification Of Biomass, M. Aghabararnejad, Jamal Chaouki, Gregory S. Patience
The Development Of A Novel Cu-Mn Oxygen Carrier For The Chemical Looping Gasification Of Biomass, M. Aghabararnejad, Jamal Chaouki, Gregory S. Patience
10th International Conference on Circulating Fluidized Beds and Fluidization Technology - CFB-10
Circulating fluidized bed technology applied to combustion processes in which oxygen and fuel are fed into separate reactors is referred to as Chemical Looping Combustion. Typically, oxygen reacts with a reduced metal (-oxide), then it is transferred to a second vessel where the metal oxide is reduced by a hydrocarbon. In chemical looping gasification, a fuel is contacted indirectly by oxygen and/or steam again with a metal oxide shuttling between two vessels reducing the contact between fuel and air. In this case, a concentrated stream of syngas exits the fuel reactor undiluted by nitrogen. The objective of this study is …
A Pyrolysis Pilot Unit Integrated To A Circulating Fluidized Bed Boiler - Experiences From A Pilot Project, J. Autio, J. Lehto, A. Oasmaa, Y. Solantausta, P. Jokela, J. Alin
A Pyrolysis Pilot Unit Integrated To A Circulating Fluidized Bed Boiler - Experiences From A Pilot Project, J. Autio, J. Lehto, A. Oasmaa, Y. Solantausta, P. Jokela, J. Alin
10th International Conference on Circulating Fluidized Beds and Fluidization Technology - CFB-10
A novel integrated pyrolysis pilot plant has been built in Tampere, Finland by Metso, in co-operation with UPM, Fortum and VTT. A 7 tons of bio-oil per day (2 MWfuel input) fast pyrolysis unit has been integrated with Metso’s 4 MWth CFB pilot boiler. Test runs of bio-oil production have been carried out during 2009-2010. More than 80 tons of bio-oil has been produced and utilization tests have been started in district heating burner applications.
High-Resolution Simulations Of Gas-Solids Jet Penetration Into A High- Density Riser Flow, Tingwen Li, C. Guenther
High-Resolution Simulations Of Gas-Solids Jet Penetration Into A High- Density Riser Flow, Tingwen Li, C. Guenther
10th International Conference on Circulating Fluidized Beds and Fluidization Technology - CFB-10
High-resolution simulations of a gas-solids jet in a 0.3 m diameter and 15.9 m tall circulating fluidized bed (CFB) riser were conducted with the open source software-MFIX. In the numerical simulations, both gas and solids injected through a 1.6 cm diameter radial-directed tube 4.3 m above the bottom distributor were tracked as tracers, which enable the analysis of the characteristics of a two-phase jet. Two jetting gas velocities of 16.6 and 37.2 m/s were studied with the other operating conditions fixed. Reasonable flow hydrodynamics with respect to overall pressure drop, voidage, and solids velocity distributions were predicted. Due to the …
A Modeling Study Of Gas Streaming In A Deep Fluidized Bed Of Geldart A Particles, Shayan Karimipour, Todd S. Pugsley
A Modeling Study Of Gas Streaming In A Deep Fluidized Bed Of Geldart A Particles, Shayan Karimipour, Todd S. Pugsley
10th International Conference on Circulating Fluidized Beds and Fluidization Technology - CFB-10
Gas streaming has been modeled in a deep fluidized bed of 5 m depth and 0.3 m inside diameter. The model results suggest that the lower pressure drop of the stream zone compared to the remainder of the bed is the reason for severe streaming flow in deep beds. The effects of different parameters such as bed depth, gas velocity and particle size on the severity of the streaming flow are also evaluated with the model.
Fluidized Bed Membrane Reactor For Steam Reforming Of Higher Hydrocarbons: Model Sensitivity, M.A. Rakib, John R. Grace, C. Jim Lim
Fluidized Bed Membrane Reactor For Steam Reforming Of Higher Hydrocarbons: Model Sensitivity, M.A. Rakib, John R. Grace, C. Jim Lim
10th International Conference on Circulating Fluidized Beds and Fluidization Technology - CFB-10
A fluidized bed membrane reactor (FBMR) was built and operated at temperatures <600°C to reform higher hydrocarbons like propane and heptane. A two-phase reactor model is utilized to simulate the FBMR with hydrogen withdrawn from both phases. The superficial gas velocities in the reactor change because of variations in molar flow due to reaction and hydrogen withdrawal through the membranes, as well as variations in temperature, pressure and cross-sectional area. Sensitivity studies show that the FBMR performance is primarily controlled by chemical equilibrium and hydrogen permeation through the membranes, while being insensitive to errors in accurately characterizing the chemical kinetics and hydrodynamics.
Removal Of Nitrate From Water Using Fluidized Bed Ion Exchange Column, Ammar Arab Beddai, Basava Rao
Removal Of Nitrate From Water Using Fluidized Bed Ion Exchange Column, Ammar Arab Beddai, Basava Rao
10th International Conference on Circulating Fluidized Beds and Fluidization Technology - CFB-10
Experimental and theoretical studies were carried out to investigate the performance of a fluidized bed ion exchange system to remove nitrate. The exchange of nitrate on strong anion exchange resin (TULSION A-27) was studied in the flow rate range of 2 to 7 L/h. Nitrate removal was done at five conditions of the expanded bed height (Z). The results showed that the experimental data can be fitted to Richardson and Zaki equation, and the comparison between the experimental and calculated terminal velocities showed low relative error
Production Of Gasoline And Gaseous Olefins By Catalytic Cracking Of Pyrolysis Oil, Peter Bielansky, Alexander Reichhold, Alexander Weinert
Production Of Gasoline And Gaseous Olefins By Catalytic Cracking Of Pyrolysis Oil, Peter Bielansky, Alexander Reichhold, Alexander Weinert
10th International Conference on Circulating Fluidized Beds and Fluidization Technology - CFB-10
Co-processing of biomass in petroleum refineries is a promising approach for biofuel production. In this work fluid catalytic cracking of residue from a co-pyrolysis with sawdust and VGO (1:2) was investigated. The pyrolysis oil residue with a boiling range bigger than 350 °C was mixed in different ratios with VGO and could be processed successfully up to 20 m%. Crack gas amounts increased while gasoline and total fuel yields decreased compared to VGO cracking. The gasoline obtained has a high octane number and is oxygen free.
Fluid Dynamic Effects Of Ring- Type Internals In A Dual Circulating Fluidized Bed System, D.C Guio-Perez, K. Marx, Tobias Pröll, Hermann Hofbauer
Fluid Dynamic Effects Of Ring- Type Internals In A Dual Circulating Fluidized Bed System, D.C Guio-Perez, K. Marx, Tobias Pröll, Hermann Hofbauer
10th International Conference on Circulating Fluidized Beds and Fluidization Technology - CFB-10
Intensified gas-solids contact in the fuel reactor of chemical looping combustion systems can be a key issue for achieving the necessary gas-phase conversion rates. Wedge-shaped rings were designed and installed in the fuel reactor of a cold flow model for fluid dynamic testing. These internals are meant to reduce the typical radial and axial solids concentration non-uniformity. It is shown, that more solids are present in the upper regions of the riser when in-ternals are used. Additionally, increase of the solids elutriation rate from the riser was found
A Practical Model For A Dense- Bed Countercurrent Fcc Regenerator, Yongmin Zhang, Chunxi Lu
A Practical Model For A Dense- Bed Countercurrent Fcc Regenerator, Yongmin Zhang, Chunxi Lu
10th International Conference on Circulating Fluidized Beds and Fluidization Technology - CFB-10
In this study, a new practical countercurrent regenerator model for in-situ FCC operation optimization was proposed. A three-zone-and-two-phase gas model and a new two-CSTR-with-interchange model were used to give better descriptions on the gas and solids flow patterns, addressing the region-dependent mass transfer rates and the freeboard effect on catalyst regeneration. The model coupled mass and heat balances, hydrodynamics and reaction kinetics. The modeled results are in reasonable agreement with the commercial data from an industrial FCC regenerator under both partial and full CO combustion modes.
Study Of Calcination-Carbonation Of Calcium Carbonate In Different Fluidizing Mediums For Chemical Looping Gasification In Circulating Fluidized Beds, Prabir Basu, Bishnu Achayra, Animesh Dutta
Study Of Calcination-Carbonation Of Calcium Carbonate In Different Fluidizing Mediums For Chemical Looping Gasification In Circulating Fluidized Beds, Prabir Basu, Bishnu Achayra, Animesh Dutta
10th International Conference on Circulating Fluidized Beds and Fluidization Technology - CFB-10
Chemical looping gasification (CLG) of biomass in a circulating fluidized bed is an excellent option for production of separate streams of hydrogen rich and carbon dioxide rich gases. This process uses H2O (steam) instead of air or oxygen for gasification, and thereby produces high value nitrogen free product gas. An important feature of this process is in-process removal of carbon dioxide from the reaction site by CaO. This allows the reaction to move towards higher yield of hydrogen. Circulating fluidized bed (CFB) provides an ideal reactor configuration for such a looping reaction. A CFB based CLG unit operates somewhat similar …
The Influence Of Carbon Stripper Efficiency On Co2 Capture Rate In A Chemical-Looping Combustion Process For Solid Fuels, Marvin Kramp, Andreas Thon, Ernst-Ulrich Hartge, Stefan Heinrich, Joachim Werther
The Influence Of Carbon Stripper Efficiency On Co2 Capture Rate In A Chemical-Looping Combustion Process For Solid Fuels, Marvin Kramp, Andreas Thon, Ernst-Ulrich Hartge, Stefan Heinrich, Joachim Werther
10th International Conference on Circulating Fluidized Beds and Fluidization Technology - CFB-10
In the present work a Chemical-Looping Combustion process for solid fuels is simulated on the 100 MWth scale. The coal is gasified inside the fuel reactor by recirculated CO2 and H2O. A carbon stripper downstream of the fuel reactor is used to reduce the carryover of char from the fuel to the air reactor. The influence of the carbon stripper on the CO2 capture rate is investigated. The results demonstrate the significance of the carbon stripper in this process.
Understanding Standpipe Hydrodynamics Using Electrical Capacitance Tomography, Reddy Karri Dr, Changhua Qui, Robert Joachim S.B
Understanding Standpipe Hydrodynamics Using Electrical Capacitance Tomography, Reddy Karri Dr, Changhua Qui, Robert Joachim S.B
10th International Conference on Circulating Fluidized Beds and Fluidization Technology - CFB-10
Standpipes are often the bottleneck in a circulating fluidized bed processes. Understanding the pressure build and dissipation in a standpipe is critical in designing and operating a standpipe that can meet production needs. However, this critical component of a circulating fluidized bed (CFB) is often neglected in the design process which usually results in an underperforming unit operation. In an effort to better design new standpipe and to better optimize existing ones, electrical capacitance tomography (ECT) was evaluated in a 7-inch (18-cm) diameter standpipe to understand the gas-solid hydrodynamics in a standpipe with respect to circulation rates and aeration strategies.
Simulation Of Particle-Gas Flow In A Cyclone Using Urans, Aku Karvinen, Hannu Ahlstedt, Marko Palonen
Simulation Of Particle-Gas Flow In A Cyclone Using Urans, Aku Karvinen, Hannu Ahlstedt, Marko Palonen
10th International Conference on Circulating Fluidized Beds and Fluidization Technology - CFB-10
Particle-gas flow in a cyclone separator used in a circulating fluidized-bed boiler is simulated using computational fluid dynamics software Fluent 6.2.36 and an Unsteady Reynolds-Averaged Navier-Stokes (URANS) method. A Lagrangian method is used for particle simulation and a one-way coupling between particles and gas is assumed. The effect of the turbulence model is studied using several turbulence models. Only the Reynolds stress model gives a physically reasonable flow field without adjusting parameters unknown beforehand.
Design Requirements For Pressurized Chemical Looping Reforming, Tobias Pröll, Hermann Hofbauer, K. Marx
Design Requirements For Pressurized Chemical Looping Reforming, Tobias Pröll, Hermann Hofbauer, K. Marx
10th International Conference on Circulating Fluidized Beds and Fluidization Technology - CFB-10
A key issue in chemical looping reforming is to operate the process under pressurized conditions. Applicability of dual fluidized bed systems, currently used in atmospheric chemical looping processes, is affected by pressure. Critical design issues were studied and experimentally verified by cold flow model experiments. It turns out that it is important to achieve sufficient global solids circulation and to keep the pressure difference between the reactors low enough for proper operation of the loop seals.
Flow Field In A Novel Short Residence Time Gas-Solid Separator, Mengxi Liu, Chunxi Lu, Zhuan Wang
Flow Field In A Novel Short Residence Time Gas-Solid Separator, Mengxi Liu, Chunxi Lu, Zhuan Wang
10th International Conference on Circulating Fluidized Beds and Fluidization Technology - CFB-10
The gas flow field in a short residence time separator was investigated. The tangential velocity in the separator housing increases with increasing angle to the positive x axis, and decreases with increasing radial position. A swirl of opposite direction to the main current in the separator housing occurs in the gas outlet.
Cold Flow Model Study On Interconnected Fluidized Bed Reactors For Multi-Generation Systems And Chemical Looping Processes, Georgy A. Ryabov, O M. Folomeyev, D A. Sankin, K V. Khaneyev
Cold Flow Model Study On Interconnected Fluidized Bed Reactors For Multi-Generation Systems And Chemical Looping Processes, Georgy A. Ryabov, O M. Folomeyev, D A. Sankin, K V. Khaneyev
10th International Conference on Circulating Fluidized Beds and Fluidization Technology - CFB-10
Interconnected fluidized bed reactors (DCFB) were implemented in multi-generation systems (pyrolysis FB reactor and CFB boiler), chemical looping combustion (CLC) systems (double metal oxides or carbonate oxide reactors) and three reactor chemical looping gasification processes. The presented data focus on the solids circulation rate and on pressure profiles of the DCFB depended on selected operating parameters such as fluidization gas flow rate, loop seal fluidization, and solids inventory. Most work was devoted to studying standpipe and valve operation.
Conference Program, Ted Knowlton
Conference Program, Ted Knowlton
10th International Conference on Circulating Fluidized Beds and Fluidization Technology - CFB-10
No abstract provided.
Reflections On Mathematical Models And Simulation Of Gas-Particle Flows, Sankaran Sundaresan
Reflections On Mathematical Models And Simulation Of Gas-Particle Flows, Sankaran Sundaresan
10th International Conference on Circulating Fluidized Beds and Fluidization Technology - CFB-10
No abstract provided.
Gas Tracer Study In A Non Mechanical L-Valve, Mohammad-Mahdi Yazdanpanah, Ali Hoteit, Ann Forret, Thierry Gauthier, Arnaud Delebarre
Gas Tracer Study In A Non Mechanical L-Valve, Mohammad-Mahdi Yazdanpanah, Ali Hoteit, Ann Forret, Thierry Gauthier, Arnaud Delebarre
10th International Conference on Circulating Fluidized Beds and Fluidization Technology - CFB-10
No abstract provided.
New System For The Continuous Removal Of Bio-Char From Bubbling Bed Pyrolyzers, Craig Mara, Lorenzo Ferrante, Franco Berruti, Cedric Briens
New System For The Continuous Removal Of Bio-Char From Bubbling Bed Pyrolyzers, Craig Mara, Lorenzo Ferrante, Franco Berruti, Cedric Briens
Bioenergy III: Present and New Perspectives on Biorefineries
No abstract provided.
Fluidized Bed Pyrolysis Of Lignin In A Bubbling Bed Reactor, Pietro Palmisano, Valentina Lago, Franco Berruti, Cedric Briens
Fluidized Bed Pyrolysis Of Lignin In A Bubbling Bed Reactor, Pietro Palmisano, Valentina Lago, Franco Berruti, Cedric Briens
Bioenergy III: Present and New Perspectives on Biorefineries
No abstract provided.
Meat And Bone Meal Pyrolysis Study In A Laboratory-Scale Bubbling Fluidized Bed Reactor, Federico M. Berruti, Lorenzo Ferrante, Cedric Briens, Franco Berruti
Meat And Bone Meal Pyrolysis Study In A Laboratory-Scale Bubbling Fluidized Bed Reactor, Federico M. Berruti, Lorenzo Ferrante, Cedric Briens, Franco Berruti
Bioenergy III: Present and New Perspectives on Biorefineries
No abstract provided.
Effects Of Biochar On Products Yields During Biomass Pyrolysis In A Bubbling Bed Reactor, Pietro Palmisano, Franco Berruti, Cedric Briens
Effects Of Biochar On Products Yields During Biomass Pyrolysis In A Bubbling Bed Reactor, Pietro Palmisano, Franco Berruti, Cedric Briens
Bioenergy III: Present and New Perspectives on Biorefineries
No abstract provided.
A Multi-Objective Evaluation Of Pc Plants With Aqueous Amine Carbon Capture Systems, John Eslick
A Multi-Objective Evaluation Of Pc Plants With Aqueous Amine Carbon Capture Systems, John Eslick
CO2 Summit: Technology and Opportunity
No abstract provided.
Lifecycle Energy Modeling - Input Into Upstream Design Process, Prasanth Chandrahasan
Lifecycle Energy Modeling - Input Into Upstream Design Process, Prasanth Chandrahasan
CO2 Summit: Technology and Opportunity
No abstract provided.
Towards Sustainable Energy: Tailored Synthesis Of Carbon-Neutral Filler Materials During Carbon Mineral Sequestration, Ah-Hyung Alissa Park
Towards Sustainable Energy: Tailored Synthesis Of Carbon-Neutral Filler Materials During Carbon Mineral Sequestration, Ah-Hyung Alissa Park
CO2 Summit: Technology and Opportunity
No abstract provided.
Net Energy And Greenhouse Gas Emissions Evaluation Of Biodiesel Derived From Microalgae, Liaw Y. Batan
Net Energy And Greenhouse Gas Emissions Evaluation Of Biodiesel Derived From Microalgae, Liaw Y. Batan
CO2 Summit: Technology and Opportunity
No abstract provided.
Achieving Process Energy Efficiency Via Innovation, Greg Werba
Achieving Process Energy Efficiency Via Innovation, Greg Werba
CO2 Summit: Technology and Opportunity
No abstract provided.
Unblocking Biofuels With Microchannel Technology, Jeff Mcdaniel
Unblocking Biofuels With Microchannel Technology, Jeff Mcdaniel
CO2 Summit: Technology and Opportunity
No abstract provided.
Co2 Summit: Complete Conference Program, Frank Zhu
Co2 Summit: Complete Conference Program, Frank Zhu
CO2 Summit: Technology and Opportunity
Final Conference Program