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Parameter Estimation Of Liquid Film Mass Transfer Coefficient And Effective Interfacial Area For Random And Structured Packings
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Book Synopsis Parameter Estimation of Liquid Film Mass Transfer Coefficient and Effective Interfacial Area for Random and Structured Packings by : Xinsheng Ji
Download or read book Parameter Estimation of Liquid Film Mass Transfer Coefficient and Effective Interfacial Area for Random and Structured Packings written by Xinsheng Ji and published by . This book was released on 1997 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Parameter Estimation of Liquid Film Mass Transfer Coefficient and Effective Interfacial Area for Random and Structured Packings by :
Download or read book Parameter Estimation of Liquid Film Mass Transfer Coefficient and Effective Interfacial Area for Random and Structured Packings written by and published by . This book was released on 1997 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Packed Bed Columns by : Nikolai Kolev
Download or read book Packed Bed Columns written by Nikolai Kolev and published by Elsevier. This book was released on 2006-08-08 with total page 709 pages. Available in PDF, EPUB and Kindle. Book excerpt: Packed bed columns are largely employed for absorption, desorption, rectification and direct heat transfer processes in chemical and food industry, environmental protection and also processes in thermal power stations like water purification, flue gas heat utilization and SO2 removal. These Separation processes, are estimated to account for 40%-70% of capital and operating costs in process industry. Packed bed columns are widely employed in this area. Their usage also for direct heat transfer between gas and liquid, enlarge their importance. They are the best apparatuses, from thermodynamical point of view, for mass and heat transfer processes between gas and liquid phase. Their wide spreading is due to low capital investments and operating costs. Since 1995 there has not been published a specialised book in this area, and this is a period of quick development of packed columns. Packed Bed Columns reflects the state of this field including the author's experience on creating and investigating of new packings, column internals and industrial columns. - Considers the theories of mass transfer processes and shows how they help the construction of highly effective packings - Complete information about the performance characteristics of different modern types of highly effective packings - Considers the models for calculation and areas of their application
Book Synopsis Handbook of Separation Process Technology by : Ronald W. Rousseau
Download or read book Handbook of Separation Process Technology written by Ronald W. Rousseau and published by John Wiley & Sons. This book was released on 1987-05-13 with total page 1028 pages. Available in PDF, EPUB and Kindle. Book excerpt: Surveys the selection, design, and operation of most of the industrially important separation processes. Discusses the underlying principles on which the processes are based, and provides illustrative examples of the use of the processes in a modern context. Features thorough treatment of newer separation processes based on membranes, adsorption, chromatography, ion exchange, and chemical complexation. Includes a review of historically important separation processes such as distillation, absorption, extraction, leaching, and crystallization and considers these techniques in light of recent developments affecting them.
Book Synopsis Mass Transfer Coefficients and Effective Area of Packing by : Chao Wang
Download or read book Mass Transfer Coefficients and Effective Area of Packing written by Chao Wang and published by . This book was released on 2015 with total page 408 pages. Available in PDF, EPUB and Kindle. Book excerpt: The effective mass transfer area (a [subscript e]), liquid film mass transfer coefficient (k [subscript L]), and gas film mass transfer coefficient (k [subscript G]) of eleven structured packings and three random packings were measured consistently in a 0.428 m packed column. Absorption of CO2 with 0.1 gmol/L NaOH with 3.05 m packing was used to measure a [subscript e], while air stripping of toluene from water with 1.83 m packing was used to measure k [subscript L], and absorption of SO2 with 0.1 gmol/L NaOH with 0.51 m packing was used to measure k [subscript G]. The experiments were conducted with liquid load changing from 2.5 to 75 m3/(m2*h) and gas flow rate from 0.6 to 2.3 m/s. Packings with surface area from 125 to 500 m2/m3 and corrugation angle from 45 to 70 degree were tested to explore the effect of packing geometries on mass transfer. The effective area increases with packing surface area and liquid flow rate, and is independent of gas velocity. The packing corrugation angle has an insignificant effect on mass transfer area. The ratio of effective area to surface area decreases as surface area increases due to the limit of packing wettability. A correlation has been developed to predict the mass transfer area with an average deviation of 11%. [Mathematical equation]. The liquid film mass transfer coefficient is only a function of liquid velocity with a power of 0.74, while the gas film mass transfer coefficient is only a function of gas velocity with a power of 0.58. Both k [subscript L] and k [subscript G] increase with packing surface area, and decrease with corrugation angle. A new concept, Mixing Point Density, was introduced to account for effect of the packing geometry on k[subscript L] and k [subscript G]. Mixing Point Density represents the frequency at which liquid film is refreshed and gas is mixed. The mixing point density can be calculated by either packing characteristic length or by surface area and corrugation angle: [mathematical equation]. The dimensionless k [subscript L] and k [subscript G] models can then be developed based on the effects of liquid/gas velocity, mixing point density, packing surface area: [mathematical equation] [mathematical equation]. Mi is the dimensionless form of Mixing Point Density (M), which is M divided by a [subscript P]3. Because Mi is only a function of corrugation angle ([Theta]), it is a convenient transformation to represent the effect of [Theta] on mass transfer parameters. An economic analysis of the absorber was conducted for a 250 MW coal-fired power plant. The optimum operating condition is between 50 to 80 % of flooding, and the optimum design is to use packing with 200 to 250 m2/m3 surface area and high corrugation angle (60 to 70 degree). The minimum total cost ranges from $4.04 to $5.83 per tonne CO2 removed with 8 m PZ.
Book Synopsis Advances in Carbon Capture by : Mohammad Reza Rahimpour
Download or read book Advances in Carbon Capture written by Mohammad Reza Rahimpour and published by Woodhead Publishing. This book was released on 2020-08-04 with total page 574 pages. Available in PDF, EPUB and Kindle. Book excerpt: Advances in Carbon Capture reviews major implementations of CO2 capture, including absorption, adsorption, permeation and biological techniques. For each approach, key benefits and drawbacks of separation methods and technologies, perspectives on CO2 reuse and conversion, and pathways for future CO2 capture research are explored in depth. The work presents a comprehensive comparison of capture technologies. In addition, the alternatives for CO2 separation from various feeds are investigated based on process economics, flexibility, industrial aspects, purification level and environmental viewpoints. - Explores key CO2 separation and compare technologies in terms of provable advantages and limitations - Analyzes all critical CO2 capture methods in tandem with related technologies - Introduces a panorama of various applications of CO2 capture
Book Synopsis Effect of Liquid Viscosity on Liquid Film Mass Transfer for Packings by : Di Song
Download or read book Effect of Liquid Viscosity on Liquid Film Mass Transfer for Packings written by Di Song and published by . This book was released on 2017 with total page 526 pages. Available in PDF, EPUB and Kindle. Book excerpt: The effect of liquid viscosity ([mu]L) on liquid film mass transfer for packings was investigated in a pilot-scale column with 0.43 m (16.8 in) ID and 3 m (10 ft) maximum packing. Mass transfer area (ae) of three structured packings, one random packing, and one hybrid packings was measured by chemical absorption of CO2 into dilute (~ 0.1 mol/L) NaOH. Liquid film mass transfer coefficient (kL) of eight structured packings, one random packing, and one hybrid packing was measured by air stripping toluene from water. Liquid viscosity was varied 0.8-70 mPa·s by adding 0-89 wt % glycerol to water in one ae and nine kL experiments. In the experiments, the liquid load was varied 6-75 m3/m2·hr (2.5-30 gpm/ft2), and the gas rates were 0.6, 1, and 1.5 m/s (180, 300, and 450 ACFM). The models of ae,packing and kL were developed based on data for 39 packings from this work and the SRP air-water column database. The model of the gas film mass transfer coefficient, kG, was developed based on data for 20 packings in the SRP air-water database. The secondary (wall and end) effect of ae was corrected in the area model. A taller packing bed consistently gave smaller kL due to maldistribution. Liquid viscosity does not have a significant effect on ae. The kL depends on [mu]L to the -0.75 power, in which the -0.4 is the direct influence on the liquid turbulence, and -0.35 is the indirect effect via diffusivity of the mass transfer species. The effect of [mu]L on kL is the same for different packing geometry and types. To prepare for the pilot-scale area experiment with glycerol, reaction kinetic model of CO2 and hydroxide in aqueous glycerol was developed based on the wetted-wall column (WWC) experiments.
Book Synopsis Determination of a Mass Transfer Coefficient in Liquid-liquid Extraction Exclusive of the Interfacial Area by : John Patrick Mulroney
Download or read book Determination of a Mass Transfer Coefficient in Liquid-liquid Extraction Exclusive of the Interfacial Area written by John Patrick Mulroney and published by . This book was released on 1959 with total page 112 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Predictions of the Mass Transfer in Structured Packings Using Computational Fluid Dynamics by : Luke Howard Macfarlan
Download or read book Predictions of the Mass Transfer in Structured Packings Using Computational Fluid Dynamics written by Luke Howard Macfarlan and published by . This book was released on 2021 with total page 428 pages. Available in PDF, EPUB and Kindle. Book excerpt: Chemical separations are widely performed in industry, with vapor-liquid contactors often accomplishing these separations and providing high-purity products. Structured packings are commonly employed in vapor-liquid contactors and exhibit low pressure drops, high throughputs, and excellent chemical separation performance. Despite the widespread use of these packings, the transport phenomena occurring within them are incompletely understood, inhibiting improvement efforts. Computational fluid dynamics (CFD) is a promising approach to predict the transport phenomena occurring inside the packings and to guide packing innovation. In this work, CFD predicted the gas-phase mass transfer performance of structured packings, and several key observations resulted. After a model for turbulence-aided mass transfer was identified with pipe flow simulations, the gas-phase mass transfer performance of a traditional structured packing was predicted. The mass transfer coefficients from CFD showed a five percent deviation compared to experimental data, validating the simulations. A geometry investigation determined the impact of three fundamental structured packing parameters on the packing performance. Improved mass transfer performance often occurred at the cost of hydrodynamic performance. Turbulence had a large impact on the gas-phase predictions. The liquid-phase mass transfer in structured packings was also simulated. A novel simulation methodology enabled the structured packing performance predictions. To validate the hydrodynamic predictions from the CFD simulations, the predicted liquid holdup was compared to experimental liquid holdup data and showed a deviation of six percent. Comparisons of the predicted liquid flow angle and friction factor to analytical expressions further validated the hydrodynamic CFD predictions. The liquid mass transfer coefficient predictions were validated with experimental data, having a deviation of eight percent, as well as with semi-empirical models. A structured packing geometry study was conducted for the liquid-phase performance, and liquid upheaval near packing crimps significantly contributed to the chemical separation. A novel interfacial mass transfer model was developed for multiphase CFD simulations. This model can handle concentration jumps of multiple orders of magnitude across the gas-liquid interface. An analytical solution to a two-dimensional system validated the CFD predictions, producing an error of less than one percent. The model was adapted for turbulent conditions and was demonstrated on a structured packing system
Book Synopsis Estimation of Liquid-film Mass Transfer Coefficients for Countercurrently Operated Random Packed Absorption Columns by : Hayley E. Hoffpauir
Download or read book Estimation of Liquid-film Mass Transfer Coefficients for Countercurrently Operated Random Packed Absorption Columns written by Hayley E. Hoffpauir and published by . This book was released on 1997 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Distillation: Equipment and Processes by : Andrzej Gorak
Download or read book Distillation: Equipment and Processes written by Andrzej Gorak and published by Academic Press. This book was released on 2014-06-24 with total page 373 pages. Available in PDF, EPUB and Kindle. Book excerpt: Distillation: Equipment and Processes—winner of the 2015 PROSE Award in Chemistry & Physics from the Association of American Publishers—is a single source of authoritative information on all aspects of the theory and practice of modern distillation, suitable for advanced students and professionals working in a laboratory, industrial plants, or a managerial capacity. It addresses the most important and current research on industrial distillation, including all steps in process design (feasibility study, modeling, and experimental validation), together with operation and control aspects. This volume features an extra focus on distillation equipment and processes. - Winner of the 2015 PROSE Award in Chemistry & Physics from the Association of American Publishers - Practical information on the newest development written by recognized experts - Coverage of a huge range of laboratory and industrial distillation approaches - Extensive references for each chapter facilitates further study
Book Synopsis Mathematical Modelling for Prediction of Effective Interfacial Area and Mass Transfer Coefficients in Packed Columns for Absorption by : R. Sengupta
Download or read book Mathematical Modelling for Prediction of Effective Interfacial Area and Mass Transfer Coefficients in Packed Columns for Absorption written by R. Sengupta and published by . This book was released on 1990 with total page 21 pages. Available in PDF, EPUB and Kindle. Book excerpt: The available experimental data on effective interfacial area and mass transfer coefficients in irrigated packed towers, has been analysed in a systematic manner for the cases of physical absorption and absorption with chemical reaction. Generalised correlations are developed for effective interfacial area, liquid phase and gas phase mass transfer coefficients. Further an attempt has also been made to elucidate the mechanism of mass transfer. It is expected that the correlations developed in this investigation could be utilised conveniently for designing packed absorption towers. [Authors' abstract].
Download or read book Packed Towers written by Reinhard Billet and published by Wiley-VCH. This book was released on 1995-02-22 with total page 408 pages. Available in PDF, EPUB and Kindle. Book excerpt: Discusses important theoretical and practical aspects for the calculation, design and operation of packed towers. This text also outlines the advantages of packed towers, as opposed to plate towers, for saving energy and protecting the environment.
Book Synopsis Estimation of Liquid‐side Mass Transfer Coefficient and Liquid Film Thickness in a Bubble Column Using Single Spherical Bubble Model by :
Download or read book Estimation of Liquid‐side Mass Transfer Coefficient and Liquid Film Thickness in a Bubble Column Using Single Spherical Bubble Model written by and published by . This book was released on 2018 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Mass Transfer Area of Structured Packing by : Robert Edison Tsai
Download or read book Mass Transfer Area of Structured Packing written by Robert Edison Tsai and published by . This book was released on 2010 with total page 736 pages. Available in PDF, EPUB and Kindle. Book excerpt: The mass transfer area of nine structured packings was measured as a function of liquid load, surface tension, liquid viscosity, and gas rate in a 0.427 m (16.8 in) ID column via absorption of CO2 from air into 0.1 mol/L NaOH. Surface tension was decreased from 72 to 30 mN/m via the addition of a surfactant (TERGITOL[trademark] NP-7). Viscosity was varied from 1 to 15 mPa·s using poly(ethylene oxide) (POLYOX[trademark] WSR N750). A wetted-wall column was used to verify the kinetics of these systems. Literature model predictions matched the wetted-wall column data within 10%. These models were applied in the interpretation of the packing results. The packing mass transfer area was most strongly dictated by geometric area (125 to 500 m2/m3) and liquid load (2.5 to 75 m3/m2·h or 1 to 30 gpm/ft2). A reduction in surface tension enhanced the effective area. The difference was more pronounced for the finer (higher surface area) packings (15 to 20%) than for the coarser ones (10%). Gas velocity (0.6 to 2.3 m/s), liquid viscosity, and channel configuration (45° vs. 60° or smoothed element interfaces) had no appreciable impact on the area. Surface texture (embossing) increased the area by 10% at most. The ratio of effective area to specific area (a[subscript e]/a[subscript p]) was correlated within limits of "13% for the experimental database: [mathematical formula]. This area model is believed to offer better predictive accuracy than the alternatives in the literature, particularly under aqueous conditions. Supplementary hydraulic measurements were obtained. The channel configuration significantly impacted the pressure drop. For a 45°-to-60° inclination change, pressure drop decreased by more than a factor of two and capacity expanded by 20%. Upwards of a two-fold increase in hold-up was observed from 1 to 15 mPa·s. Liquid load strongly affected both pressure drop and hold-up, increasing them by several-fold over the operational range. An economic analysis of an absorber in a CO2 capture process was performed. Mellapak[trademark] 250X yielded the most favorable economics of the investigated packings. The minimum cost for a 7 m MEA system was around $5-7/tonne CO2 removed for capacities in the 100 to 800 MW range.
Book Synopsis Liquid-film Mass Transfer Coefficients for Three Different Types of Plastic Packings by : Sven-Gunnar Trulsson
Download or read book Liquid-film Mass Transfer Coefficients for Three Different Types of Plastic Packings written by Sven-Gunnar Trulsson and published by . This book was released on 1976 with total page 170 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Liquid Film Mass Transfer Coefficients for Countercurrent Random Packed Absorption Columns by : Anthony B. Ponter
Download or read book Liquid Film Mass Transfer Coefficients for Countercurrent Random Packed Absorption Columns written by Anthony B. Ponter and published by . This book was released on 2001 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
