Theoretical Aspects of Gas Absorption in Packed Towers PDF Download
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Author: Bernard Lamar Schulman
Publisher:
ISBN:
Category :
Languages : en
Pages : 166
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Book Description
Author: Bernard Lamar Schulman
Publisher:
ISBN:
Category :
Languages : en
Pages : 166
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Author: Larew W. Wheaton
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Author: Jong Soo Cho
Publisher:
ISBN:
Category : Gases
Languages : en
Pages : 190
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Book Description
The surface renewal rate from Danckwerts' theory and the effective interfacial area between gas and liquid per unit packing volume in a packed absorption tower were evaluated for the absorption of carbon dioxide into carbonate/bicarbonate buffer solution accompanied by a pseudo-first order chemical reaction. The rate of chemical reaction in the liquid phase was controlled by varying the buffer ratios. A small absorption tower was constructed, which had a packing section, 30 cm high with 10.2 cm inside diameter. Two kinds of packing, 1/2-inch Rasehig ring for one part of the experiment and 1/2 inch Ben saddle for the other part of the experiment, were used in the investigation. Sodium carbonate/bicarbonate buffer solutions, with buffer ratios varying from 0.4 to 3.0, were used. Glycerine-water solutions were also used to investigate the effect of density and viscosity on the physical absorption of carbon dioxide; the content of glycerine varied from 0 to 40 % wt. Pure carbon dioxide was used to eliminate the gas side resistance in the mass transfer operation. The results of this investigation suggested the following conclusions: The surface renewal rate, s, and the effective interfacial area per unit packing volume, a, for each packing can be expressed as functions of Reynolds Number of the liquid flow. The comparison of values from this study with those of Danckwerts showed discrepancies; these discrepancies could be due to different flow patterns, packing densities, and the apparently more uniform distribution of liquid over the packing. The mass transfer coefficient for physical absorption into glycerine solution was expressed as a function of Reynolds number and Schmidt number. The mass transfer coefficient calculated from Danckwerts' model equation, kL*a = [Ds divided by a*] for absorption of carbon dioxide into water seemed to be larger than those measured in this experiment.
Author: Nikolai Kolev
Publisher: Elsevier
ISBN: 0080463924
Category : Technology & Engineering
Languages : en
Pages : 709
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Book Description
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
Author: Ralph F. Strigle
Publisher: Butterworth-Heinemann
ISBN:
Category : Technology & Engineering
Languages : en
Pages : 360
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Author: Reinhard Billet
Publisher: Wiley-VCH
ISBN:
Category : Science
Languages : en
Pages : 408
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Book Description
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.
Author: P. L. Spedding
Publisher:
ISBN:
Category : Gases
Languages : en
Pages : 46
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Author: Robert W. Houston
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Author: Dag Eimer
Publisher: John Wiley & Sons
ISBN: 1118877624
Category : Science
Languages : en
Pages : 512
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Book Description
Gas Treating: Absorption Theory and Practice provides an introduction to the treatment of natural gas, synthesis gas and flue gas, addressing why it is necessary and the challenges involved. The book concentrates in particular on the absorption–desorption process and mass transfer coupled with chemical reaction. Following a general introduction to gas treatment, the chemistry of CO2, H2S and amine systems is described, and selected topics from physical chemistry with relevance to gas treating are presented. Thereafter the absorption process is discussed in detail, column hardware is explained and the traditional mass transfer model mechanisms are presented together with mass transfer correlations. This is followed by the central point of the text in which mass transfer is combined with chemical reaction, highlighting the associated possibilities and problems. Experimental techniques, data analysis and modelling are covered, and the book concludes with a discussion on various process elements which are important in the absorption–desorption process, but are often neglected in its treatment. These include heat exchange, solution management, process flowsheet variations, choice of materials and degradation of absorbents. The text is rounded off with an overview of the current state of research in this field and a discussion of real-world applications. This book is a practical introduction to gas treating for practicing process engineers and chemical engineers working on purification technologies and gas treatment, in particular, those working on CO2 abatement processes, as well as post-graduate students in process engineering, chemical engineering and chemistry.
Author: Kirk-Othmer
Publisher: Wiley-Interscience
ISBN: 9780471020370
Category : Science
Languages : en
Pages : 967
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Book Description
Encyclopedia of Chemical Technology The Third Edition of the Encyclopedia of Chemical Technology is built on the solid foundation of the previous editions. All of the articles have been rewritten and updated and many new subjects have been added to reflect changes in chemical technology through the 1970s. The new edition, however, will be familiar to users of the earlier editions: comprehensive, authoritative, accessible, lucid. The Encyclopedia remains an indispensable information source for all producers and users of chemical products and materials. In the Third Edition emphasis is given to major present-day topics of concern to all chemists, scientists, and engineers—energy, health, safety, toxicology, and new materials. New subjects have been added, especially those related to polymer and plastics technology, fuels and energy, inorganic and solid-state chemistry, composite materials, coating, fermentation and enzymes, pharmaceuticals, surfactant technology, fibers and textiles. New features include the use of SI units as well as English units, Chemical Abstracts Service’s Registry Numbers, and complete indexing based on automated retrieval from a machine-readable composition system. Once again this classic serves as an unrivaled library of information for the chemical and allied industries. Some comments about Kirk-Othmer— The First Edition "No reference library worthy of the name will be without this series. It is simply a must for the chemist and chemical engineer…" —Chemical and Engineering News The Second Edition "A necessity for any technical library." —Choice
