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Probing The Electrostatics And Hydrodynamics In Gas Solid Fluidized Beds
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Book Synopsis Probing the Electrostatics and Hydrodynamics in Gas-solid Fluidized Beds by : Chuan He
Download or read book Probing the Electrostatics and Hydrodynamics in Gas-solid Fluidized Beds written by Chuan He and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Use of an Optical Probe to Study the Hydrodynamics of a Gas-solid Fluidized Bed by : Fouad Arib
Download or read book Use of an Optical Probe to Study the Hydrodynamics of a Gas-solid Fluidized Bed written by Fouad Arib and published by . This book was released on 1989 with total page 180 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Effect of Operating Parameters and Particle Properties on Electrostatics in Gas-solid Fluidized Beds by :
Download or read book Effect of Operating Parameters and Particle Properties on Electrostatics in Gas-solid Fluidized Beds written by and published by . This book was released on 2009 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The influences of operating pressure, temperature and gas velocity on electrostatics in a fluidized bed of glass beads and different grades of polyethylene resin were investigated in a fluidization column of 150 mm inner diameter and 2.0 m height. Eight collision probes at different levels and radial positions measured the electrostatics in the bed. The electrostatics increased as pressure increased, probably due to an increase in bubble rise velocity, frequency and volume fraction. As the pressure increased, particle-particle and particle-wall collisions near the distributor and wall contributed heavily to charge generation. Temperature also played a role. At higher temperatures (up to 90°C), the polarity of net cumulative charge in the bed reversed. As the superficial gas velocity increased, the electrostatics increased. However, at higher gas velocities, the polarity in the freeboard was opposite to that in the bed, indicating that fines entrained from the column carried charges, resulting in a net charge of opposite polarity to that inside the bed. For Geldart group B particles the degree of electrification in the bed slightly increased with decreasing particle size. Charging for group A particles was significantly greater than for group B particles. For binary mixtures of group A and B particles the electrostatics increased as the proportion of small particles increased. As the relative humidity (RH) of fluidizing air increased, the electrostatics decreased. For the RH range (5-30%) explored, the sensitivity of the charging to RH varied significantly depending on the location of the probes. As the proportion of fine glass beads (
Book Synopsis Continuous Pharmaceutical Processing and Process Analytical Technology by : Ajit S. Narang
Download or read book Continuous Pharmaceutical Processing and Process Analytical Technology written by Ajit S. Narang and published by CRC Press. This book was released on 2023-03-01 with total page 495 pages. Available in PDF, EPUB and Kindle. Book excerpt: Continuous manufacturing of pharmaceuticals, including aspects of modern process development is highlighted in this book with both the ‘why’ and the ‘how’, emphasizing process modeling and process analytical technologies. Presenting specific case studies and drawing upon extensive experience from industry and academic opinion leaders, this book focuses on the practical aspects of continuous manufacturing. It gives the readers the strategic perspective and technical depth needed to adopt and implement these technologies, where appropriate, in order to gain the competitive edge in speed, agility, and reliability. Features: Discusses scientific solutions and process analytical technology to enable continuous manufacturing in the development of new drugs Includes short stories about how some companies have adopted CM and what their drivers were and what benefits were realized Addresses economic and practical considerations, unlike many other technical books Emphasizes the practical aspects to give the reader the strategic imperative and technological depth to adopt and implement these technologies Highlights the "why" and the "how", focusing on the need analysis and process modeling and process analytical technologies
Book Synopsis Hydrodynamics of Circulating Fluidized Beds by : P. M. Laussmann
Download or read book Hydrodynamics of Circulating Fluidized Beds written by P. M. Laussmann and published by . This book was released on 1990 with total page 201 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Flow of Gas-solids Suspensions in Circulating Fluidized Beds by : Hong Cheng
Download or read book The Flow of Gas-solids Suspensions in Circulating Fluidized Beds written by Hong Cheng and published by . This book was released on 1993 with total page 140 pages. Available in PDF, EPUB and Kindle. Book excerpt: CIRCULATING FLUIDIZED BED, SUPERFICIAL GAS VELOCITY, SOLIDS MASS FLUX, SOLIDS CONCENTRATION, SIMILAR PROFILE REGIME, OPTICAL FIBRE PROBE, DILUTE PHASE, L-VALVE, AERATION RATE, SOLIDS FLOW RATE.
Book Synopsis Gas Dispersion, Combustion and Hydrodynamics in Gas-solid Fluidized Beds by : Stephen Joseph Clough
Download or read book Gas Dispersion, Combustion and Hydrodynamics in Gas-solid Fluidized Beds written by Stephen Joseph Clough and published by . This book was released on 1996 with total page 876 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Electro-hydrodynamics of Gas-solid Fluidized Beds by : Farzaneh Jalalinejad
Download or read book Electro-hydrodynamics of Gas-solid Fluidized Beds written by Farzaneh Jalalinejad and published by . This book was released on 2013 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis An Investigation on the Mixing Hydrodynamics of a Gas-solid Fluidized Bed by : Mario A. Ruvalcaba
Download or read book An Investigation on the Mixing Hydrodynamics of a Gas-solid Fluidized Bed written by Mario A. Ruvalcaba and published by . This book was released on 2009 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Hydrodynamics of Gas-Liquid-Solid Fluidized and Semi-Fluidized Beds by :
Download or read book Hydrodynamics of Gas-Liquid-Solid Fluidized and Semi-Fluidized Beds written by and published by . This book was released on with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Two-phase and three-phase fluidized beds have been applied successfully to many industrial processes such as in the H-oil process for hydrogenation and hydrodesulfurization of residual oil, the H-coal process for coal liquefaction, Fischer-Tropsch process, and the bio-oxidation process for wastewater treatment. A semi-fluidized bed has the advantages of both the packed and the fluidized beds as it can partly over come the disadvantages of a fluidized bed, namely back-mixing of solids, attrition of particles and erosion of surfaces, and those of a packed bed, such as non-uniformity in bed temperatures, segregation of solids and channeling. Semi-fluidized beds have been applied successfully to many industrial processes (physical, chemical and biochemical)such as in the filtration, adsorption, catalytic reactions, heavy metal removal and recovery, coal pyrolysis, bio-oxidation, ethanol fermentation, granule tablet manufacturing etc.
Book Synopsis Hydrodynamic Analysis of Gas-solid Fluidized Beds by : Bozorg Ettehadieh
Download or read book Hydrodynamic Analysis of Gas-solid Fluidized Beds written by Bozorg Ettehadieh and published by . This book was released on 1982 with total page 298 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Effect of Operating Conditions and Particle Properties on Electrostatics and Entrainment in Gas-solid Fluidized Beds by : Turki A. Al-Smari
Download or read book Effect of Operating Conditions and Particle Properties on Electrostatics and Entrainment in Gas-solid Fluidized Beds written by Turki A. Al-Smari and published by . This book was released on 2014 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Investigation of Operating Parameters Influencing Electrostatic Charge Generation in Gas-solid Fluidized Beds by : Amanda Giffin
Download or read book Investigation of Operating Parameters Influencing Electrostatic Charge Generation in Gas-solid Fluidized Beds written by Amanda Giffin and published by . This book was released on 2011 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Electrostatic charge generation in gas-solid fluidized beds is a significant industrial problem. Associated problems include particle agglomeration and particle wall fouling. In the polymerization industry this may result in "sheets" of fused polymer, due to exothermic reaction causing the melting of the polymer, which can fall off and block the distributor plate disrupting fluidizing gas flow. Additionally, blockage of the catalyst feed or the polymer removal system can take place or the product can become non-uniform. All of these problems require shut-down of the reactor which results in lost production time. While this phenomena has been identified for many years, the mechanisms involved are not well understood, especially wall fouling and the distribution of charge within the bed. Isolation of individual parameters such as hydrodynamics, operating conditions, and material involved is necessary to evaluate how each parameter impacts charge generation during fluidization. In this thesis, the fluidization system consisted of a stainless steel column, two online Faraday cups, and a retractable distributor plate. This system allowed for the simultaneous measurement of charge within different regions of the bed: the entrained fine particles, the particles adhered to the column wall, and the bulk of the bed. Additionally, mass and particle size distributions were measured and images of the layer of particles adhered to the column wall were taken for comparison. This allowed for a charge distribution comparison and evaluation of wall fouling. Three different parameters were investigated: duration of fluidization, column wall material, and relative humidity of fluidizing gas. Fluidization time was studied for 15, 30, 60, 120, 180, and 360 min; relative humidity was investigated for 0%, 20%, 40%, 60%, and 80% relative humidity. Both fluidization time and relative humidity were evaluated at four different fluidization gas velocities, two each in the bubbling and slugging flow regimes. Column wall material was evaluated for a stainless steel and carbon steel column at two gas velocities, one each in the bubbling and slugging flow regimes. Fluidization time was found to influence wall fouling in the bubbling flow regime as the particle layer continued to build as fluidization progressed. In the slugging flow regime, the particle layer developed within 15 minutes of the onset of fluidization. The bubbling flow regime was shown to have a greater capacity for charge generation than the slugging flow regime. This was due to the vigorous mixing in the bubbling flow regime resulting in more particle-particle interactions. Column wall material was shown to influence wall fouling in the slugging flow regime due to the differences in surface roughness of the columns. This was due to the particle-wall contacts resulting in frictional charging which is the predominant charging mechanism in this flow regime. Charge was also impacted in the bubbling flow regime in those particles that were adhered to the column wall. Relative humidity was found to influence wall fouling at the lowest gas velocity tested. However, variations in generation of charge occurred at all fluidization gas velocities tested; the charge-to-mass ratios for the particles adhered to the column wall in the slugging flow regime decreased with high relative humidities. This was due to either the formation of a water film layer on the column wall or instantaneous surface water films on the particles throughout fluidization.
Book Synopsis The Proceedings of the ... International Conference on Fluidized-Bed Combustion by :
Download or read book The Proceedings of the ... International Conference on Fluidized-Bed Combustion written by and published by . This book was released on 1991 with total page 524 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Handbook of Fluidization and Fluid-Particle Systems by : Wen-Ching Yang
Download or read book Handbook of Fluidization and Fluid-Particle Systems written by Wen-Ching Yang and published by CRC Press. This book was released on 2003-03-19 with total page 876 pages. Available in PDF, EPUB and Kindle. Book excerpt: This reference details particle characterization, dynamics, manufacturing, handling, and processing for the employment of multiphase reactors, as well as procedures in reactor scale-up and design for applications in the chemical, mineral, petroleum, power, cement and pharmaceuticals industries. The authors discuss flow through fixed beds, elutriation and entrainment, gas distributor and plenum design in fluidized beds, effect of internal tubes and baffles, general approaches to reactor design, applications for gasifiers and combustors, dilute phase pneumatic conveying, and applications for chemical production and processing. This is a valuable guide for chemists and engineers to use in their day-to-day work.
Book Synopsis Theoretical Chemical Engineering Abstracts by :
Download or read book Theoretical Chemical Engineering Abstracts written by and published by . This book was released on 1984 with total page 634 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Advances in Engineering Fluid Mechanics: Mixed-Flow Hydrodynamics by : Nicholas P Cheremisinoff
Download or read book Advances in Engineering Fluid Mechanics: Mixed-Flow Hydrodynamics written by Nicholas P Cheremisinoff and published by Gulf Professional Publishing. This book was released on 1996-02-27 with total page 936 pages. Available in PDF, EPUB and Kindle. Book excerpt: This first volume in the series previously titled Encyclopedia of Fluid Mechanics covers multiphase systems and the transport problems associated with turbulent mixing, defining a fluid as any material displaying liquid-like behavior under the influence of deformation forces. Reports on research and application of the engineering principles associated with flow systems, highlighting topics such as jet mixing; mechanical agitation; fluidized bed reactors; and multiphase chemical reactors. Includes numerous bandw diagrams. Useful as a reference for researchers and engineers. Annotation copyright by Book News, Inc., Portland, OR